Jump to content

Equuleus: Difference between revisions

Coordinates: Sky map 21h 00m 00s, +10° 00′ 00″
From Wikipedia, the free encyclopedia
Browse history interactively
← Previous edit
Content deleted Content added
VisualWikitext
pronunciation needs citation
 
(23 intermediate revisions by 21 users not shown)
Line 1: Line 1:
{{short description|Constellation in the northern celestial hemisphere}}
{{short description|Constellation in the northern celestial hemisphere}}
{{redirects here|Equ|other uses|EQU (disambiguation){{!}}EQU}}
{{Infobox constellation
{{Infobox constellation
| name = Equuleus
| name = Equuleus
Line 6: Line 7:
| pronounce = {{IPAc-en|ᵻ|ˈ|k|w|uː|l|i|ə|s}} ''Equúleus,'' genitive {{IPAc-en|ᵻ|ˈ|k|w|uː|l|i|aɪ}}
| pronounce = {{IPAc-en|ᵻ|ˈ|k|w|uː|l|i|ə|s}} ''Equúleus,'' genitive {{IPAc-en|ᵻ|ˈ|k|w|uː|l|i|aɪ}}
| symbolism = the [[pony]]
| symbolism = the [[pony]]
| RA = {{RA|20|56|10.9212}}–{{RA|21|26|20.0331}}{{sfn|IAU, ''The Constellations'', Equuleus}}
| RA = {{RA|21}}
| dec = {{dec|13.0390635}}–{{dec|2.4773185}}{{sfn|IAU, ''The Constellations'', Equuleus}}
| dec= {{DEC|+10}}
| family = [[Heavenly Waters (astronomy)|Heavenly Waters]]
| family = [[Heavenly Waters (astronomy)|Heavenly Waters]]
| quadrant = NQ4
| quadrant = NQ4
Line 30: Line 31:
| notes=}}
| notes=}}


'''Equuleus''' ({{IPAc-en|ᵻ|ˈ|k|w|uː|l|i|ə|s}} {{respell|ih|KWOO|lee|əs}}) is a [[constellation]] of stars that are visible in the night sky. Its name is [[Latin]] for "little horse", a [[foal]]. Located on the northern [[celestial hemisphere]], it was one of the 48 constellations listed by the 2nd century astronomer [[Ptolemy]], and remains one of the 88 modern constellations. It is the second smallest of the modern constellations (after [[Crux]]), spanning only 72 square degrees. It is also very faint, having no stars brighter than the [[apparent magnitude|fourth magnitude]].
'''Equuleus''' is a faint [[constellation]] located just north of the [[celestial equator]]. Its name is [[Latin]] for "little horse", a [[foal]]. It was one of the 48 constellations listed by the 2nd century astronomer [[Ptolemy]], and remains one of the 88 modern constellations. It is the second smallest of the modern constellations (after [[Crux]]), spanning only 72 square degrees. It is also very faint, having no stars brighter than the [[apparent magnitude|fourth magnitude]].


==Notable features==
==Notable features==
Line 39: Line 40:
===Stars===
===Stars===
{{see|List of stars in Equuleus}}
{{see|List of stars in Equuleus}}
The brightest star in Equuleus is [[Alpha Equulei]], traditionally called Kitalpha, a yellow star magnitude 3.9, 186 light-years from Earth. Its traditional name means "the section of the horse".{{sfn|Ridpath|Tirion|2001|pp=144-145}}
The brightest star in Equuleus is [[Alpha Equulei|α Equulei]], traditionally called Kitalpha, a yellow star magnitude 3.9, 186 light-years from Earth. Its traditional name means "the section of the horse".{{sfn|Ridpath|Tirion|2001|pp=144-145}}


There are few [[variable star]]s in Equuleus. Only around 25 are known, most of which are faint. [[Gamma Equulei]] is an [[alpha CVn star]], ranging between magnitudes 4.58 and 4.77 over a period of around 12½ minutes.<!-- not cited to Ridpath and Tirion 2001 --> It is a white star 115 light-years from Earth, and has an [[optical binary|optical companion]] of magnitude 6.1, [[6 Equulei]]. It is divisible in binoculars.{{sfn|Ridpath|Tirion|2001|pp=144-145}} [[R Equulei]] is a [[Mira variable]] that ranges between magnitudes 8.0 and 15.7 over nearly 261 days.
There are few [[variable star]]s in Equuleus. Only around 25 are known, most of which are faint. [[Gamma Equulei|γ Equulei]] is an [[Alpha2 Canum Venaticorum variable|α<sup>2</sup> CVn variable star]], ranging between magnitudes 4.58 and 4.77<ref>{{cite journal|bibcode=2009yCat....102025S|title=VizieR Online Data Catalog: General Catalogue of Variable Stars (Samus+ 2007-2013)|journal=VizieR On-line Data Catalog: B/GCVS. Originally Published in: 2009yCat....102025S|volume=1|display-authors=etal|last1=Samus|first1=N. N.|last2=Durlevich|first2=O. V.|year=2009}}</ref> over a period of around 12½ minutes.<!-- not cited to Ridpath and Tirion 2001 --> It is a white star 115 light-years from Earth, and has an [[optical binary|optical companion]] of magnitude 6.1, [[6 Equulei]]. It is divisible in binoculars.{{sfn|Ridpath|Tirion|2001|pp=144-145}} 6 Equulei is an astrometric binary system itself,<ref name=Frankowski2007>{{citation | last1=Frankowski | first1=A. | last2=Jancart | first2=S. | last3=Jorissen | first3=A. | title=Proper-motion binaries in the Hipparcos catalogue. Comparison with radial velocity data | journal=Astronomy and Astrophysics | volume=464 | issue=1 | pages=377–392 |date=March 2007 | doi=10.1051/0004-6361:20065526 | bibcode=2007A&A...464..377F |arxiv = astro-ph/0612449 | s2cid=14010423 }}</ref> with an apparent magnitude of 6.07.<ref name=clpl4_99>{{citation | display-authors=1 | last1=Johnson | first1=H. L. | last2=Iriarte | first2=B. | last3=Mitchell | first3=R. I. | last4=Wisniewskj | first4=W. Z. | title=UBVRIJKL photometry of the bright stars | journal=Communications of the Lunar and Planetary Laboratory | volume=4 | issue=99 | year=1966 | page=99 | bibcode=1966CoLPL...4...99J }}</ref> [[R Equulei]] is a [[Mira variable]] that ranges between magnitudes 8.0 and 15.7<ref name=REqu /> over nearly 261 days. It has a spectral type of M3e-M4e<ref name=REqu>{{citation|postscript=.|bibcode=2009yCat....102025S|title=VizieR Online Data Catalog: General Catalogue of Variable Stars (Samus+ 2007-2013)|journal=VizieR On-line Data Catalog: B/GCVS. Originally Published in: 2009yCat....102025S|volume=1|pages=B/gcvs|display-authors=etal|last1=Samus|first1=N. N.|last2=Durlevich|first2=O. V.|year=2009}}</ref> and has an average B-V colour index of +1.41.<ref name=Zacharias_et_al_2012>{{citation
| title=The fourth US Naval Observatory CCD Astrograph Catalog (UCAC4)
| display-authors=1 | last1=Zacharias | first1=N.
| last2=Finch | first2=C. T. | last3=Girard | first3=T. M.
| last4=Henden | first4=A. | last5=Bartlett | first5=J. L.
| last6=Monet | first6=D. G. | last7=Zacharias | first7=M. I.
| journal=VizieR On-line Data Catalog
| volume=1322 | date=2012 | issue=2 | page=44 | doi=10.1088/0004-6256/145/2/44 | postscript=.
| bibcode=2012yCat.1322....0Z | arxiv=1212.6182 | s2cid=119299381 }}</ref>


Equuleus contains some [[double star]]s of interest. γ Equ consists of a primary star with a magnitude around 4.7 (slightly variable) and a secondary star of magnitude 11.6, separated by 2 [[arcsecond]]s. [[Epsilon Equulei]] is a triple star also designated 1 Equulei. The system, 197 light-years away, has a primary of magnitude 5.4 that is itself a binary star; its components are of magnitude 6.0 and 6.3 and have a period of 101 years. The secondary is of magnitude 7.4 and is visible in small telescopes. The components of the primary are becoming closer together and will not be divisible in amateur telescopes beginning in 2015.{{sfn|Ridpath|Tirion|2001|pp=144-145}} [[Delta Equulei|δ Equ]] is a [[binary star]] with an orbital period of 5.7 years, which at one time was the shortest known orbital period for an optical binary. The two components of the system are never more than 0.35 arcseconds apart.
Equuleus contains some [[double star]]s of interest. γ Equulei consists of a primary star with a magnitude around 4.7 (slightly variable) and a secondary star of magnitude 11.6, separated by 2 [[arcsecond]]s. [[Epsilon Equulei|ε Equulei]] is a triple star also designated 1 Equulei. The system, 197 light-years away, has a primary of magnitude 5.4 that is itself a binary star; its components are of magnitude 6.0 and 6.3 and have a period of 101 years. The secondary is of magnitude 7.4 and is visible in small telescopes. The components of the primary are becoming closer together and will not be divisible in amateur telescopes beginning in 2015.{{sfn|Ridpath|Tirion|2001|pp=144-145}} [[Delta Equulei|δ Equulei]] is a [[binary star]] with an orbital period of 5.7 years, which at one time was the shortest known orbital period for an optical binary. The two components of the system are never more than 0.35 arcseconds apart.


===Deep-sky objects===
===Deep-sky objects===
Due to its small size and its distance from the plane of the [[Milky Way]], Equuleus contains no notable deep sky objects. Some very faint [[galaxy|galaxies]] between magnitudes 13 and 15 include [[NGC 7015]], [[NGC 7040]], [[NGC 7045]] and [[NGC 7046]].
Due to its small size and its distance from the plane of the [[Milky Way]], Equuleus is rather devoid of deep sky objects. Some very faint [[galaxy|galaxies]] in the [[New General Catalogue|NGC catalog]] between [[Apparent magnitude|magnitudes]] 13 and 15 include [[NGC 7015]], [[NGC 7040]], and [[NGC 7046]]. [[NGC 7045]] is a [[triple star]] that was mistaken as a [[nebula]] by its discoverer, [[John Herschel]].<ref>{{Cite web |date= |title=NGC 7045 Basic Information |url=http://ngcicproject.observers.org/NGC/NGC_70xx/NGC_7045.htm |access-date=2024-03-25 |website=The NGC/IC Project}}</ref> Other faint galaxies in the [[Index Catalogue|IC Catalog]] include IC 1360, IC 1361, IC 1364, IC 1367, IC 1375, and IC 5083. IC 1365 is a group of galaxies. The magnitudes of these objects vary from 14.5 to 15.5, making them hard to see in even the largest of [[Amateur astronomy|amateur]] telescopes.<ref>{{Cite web |title=Deep sky objects in Equuleus - Full list |url=https://theskylive.com/sky/constellations/equuleus-deepsky-objects |access-date=2024-03-25 |website=The Sky Live}}</ref>

{{Expand section|date=June 2008}}


==Mythology==
==Mythology==
Line 54: Line 61:
In [[Greek mythology]], one myth associates Equuleus with the foal Celeris (meaning "swiftness" or "speed"), who was the offspring or brother of the winged horse [[Pegasus]]. Celeris was given to [[Castor and Pollux|Castor]] by [[Mercury (mythology)|Mercury]]. Other myths say that Equuleus is the horse struck from [[Poseidon]]'s trident, during the contest between him and [[Athena]] when deciding which would be the superior. Because this section of stars rises before [[Pegasus]], it is often called Equus Primus, or the First Horse. Equuleus is also linked to the story of [[Philyra (mythology)|Philyra]] and [[Saturn (mythology)|Saturn]].<ref>{{Cite book|last=Olcott|first=William Tyler|url=https://www.worldcat.org/oclc/947036847|title=Star lore of all ages : myths, legends, and facts|date=2004|publisher=Dover Publications|others=Fred Schaaf|isbn=978-0-486-14080-3|edition=Dover|location=Mineola, N.Y.|pages=297|oclc=947036847}}</ref>
In [[Greek mythology]], one myth associates Equuleus with the foal Celeris (meaning "swiftness" or "speed"), who was the offspring or brother of the winged horse [[Pegasus]]. Celeris was given to [[Castor and Pollux|Castor]] by [[Mercury (mythology)|Mercury]]. Other myths say that Equuleus is the horse struck from [[Poseidon]]'s trident, during the contest between him and [[Athena]] when deciding which would be the superior. Because this section of stars rises before [[Pegasus]], it is often called Equus Primus, or the First Horse. Equuleus is also linked to the story of [[Philyra (mythology)|Philyra]] and [[Saturn (mythology)|Saturn]].<ref>{{Cite book|last=Olcott|first=William Tyler|url=https://www.worldcat.org/oclc/947036847|title=Star lore of all ages : myths, legends, and facts|date=2004|publisher=Dover Publications|others=Fred Schaaf|isbn=978-0-486-14080-3|edition=Dover|location=Mineola, N.Y.|pages=297|oclc=947036847}}</ref>


Created by [[Hipparchus]] and included by [[Ptolemy]], it abuts Pegasus; unlike the larger horse it is depicted as a horse's head alone.{{sfn|Ridpath|Tirion|2001|pp=144-145}}
Created by [[Hipparchus]] and included by [[Ptolemy]], it abuts Pegasus; unlike the larger horse, it is depicted as a horse's head alone.{{sfn|Ridpath|Tirion|2001|pp=144-145}}
<ref>Evans, James "The History and Practice of Ancient Astronomy" Oxford University Press, 1998.</ref>
<ref>Evans, James "The History and Practice of Ancient Astronomy" Oxford University Press, 1998.</ref>


==Equivalents==
==Equivalents==
In [[Chinese astronomy]], the stars that correspond to Equuleus are located within the [[Black Tortoise (Chinese constellation)|Black Tortoise of the North]] (北方玄武, ''Běi Fāng Xuán Wǔ'').<ref>{{in lang|zh}} [http://aeea.nmns.edu.tw/2006/0605/ap060515.html AEEA (Activities of Exhibition and Education in Astronomy) 天文教育資訊網 2006 年 5 月 15 日]</ref>
In [[Chinese astronomy]], the stars that correspond to Equuleus are located within the [[Black Tortoise (Chinese constellation)|Black Tortoise of the North]] (北方玄武, ''Běi Fāng Xuán Wǔ'').<ref>{{in lang|zh}} [http://aeea.nmns.edu.tw/2006/0605/ap060515.html AEEA (Activities of Exhibition and Education in Astronomy) 天文教育資訊網 2006 年 5 月 15 日]</ref>

==In fiction==
Equuleus is briefly mentioned in the ''[[Martha Speaks (TV series)|Martha Speaks]]'' episode "Dogs in Space" as one of Helen Lorraine's favorite constellations.


==See also==
==See also==
Line 67: Line 71:


==References==
==References==
* {{cite web |ref={{sfnRef|IAU, ''The Constellations'', Equuleus}} |title=Equuleus |work=The Constellations |publisher=International Astronomical Union |url=https://www.iau.org/public/themes/constellations/#equ}}
* Burnham, Robert (1978). ''Burnham's Celestial Handbook: An observer's guide to the universe beyond the solar system'', vol 2. Dover Publications {{ISBN|0-486-23567-X}}
* Burnham, Robert (1978). ''Burnham's Celestial Handbook: An observer's guide to the universe beyond the solar system'', vol 2. Dover Publications {{ISBN|0-486-23567-X}}
* Hoffleit+ (1991) ''V/50 The Bright Star Catalogue'', 5th revised ed, Yale University Observatory, [https://web.archive.org/web/20061012000011/http://cdsweb.u-strasbg.fr/viz-bin/Cat?V%2F50 Strasbourg astronomical Data Center]
* Hoffleit+ (1991) ''V/50 The Bright Star Catalogue'', 5th revised ed, Yale University Observatory, [https://web.archive.org/web/20061012000011/http://cdsweb.u-strasbg.fr/viz-bin/Cat?V%2F50 Strasbourg astronomical Data Center]
Line 77: Line 82:
* [http://www.allthesky.com/constellations/delphinus/ The Deep Photographic Guide to the Constellations: Equuleus]
* [http://www.allthesky.com/constellations/delphinus/ The Deep Photographic Guide to the Constellations: Equuleus]
* [http://astrojan.eu5.org/delphin.htm The clickable Equuleus]
* [http://astrojan.eu5.org/delphin.htm The clickable Equuleus]
* [http://www.ianridpath.com/startales/equuleus.htm Star Tales – Equuleus]
* [http://www.ianridpath.com/startales/equuleus.html Star Tales – Equuleus]
* [http://warburg.sas.ac.uk/vpc/VPC_search/subcats.php?cat_1=9&cat_2=71&cat_3=32&cat_4=40&cat_5=38 Warburg Institute Iconographic Database (over 50 medieval and early modern images of Equuleus)]
* [https://iconographic.warburg.sas.ac.uk/category/vpc-taxonomy-017055 Warburg Institute Iconographic Database (medieval and early modern images of Equuleus)]


{{Stars of Equuleus}}
{{Stars of Equuleus}}
Line 85: Line 90:
{{Sky|21|00|00|+|10|00|00|10}}
{{Sky|21|00|00|+|10|00|00|10}}


{{DEFAULTSORT:Constellation, Equuleus}}
{{DEFAULTSORT:Equuleus Constellation}}
[[Category:Equuleus| ]]
[[Category:Equuleus| ]]
[[Category:Constellations]]
[[Category:Constellations]]

Latest revision as of 15:33, 27 September 2024

"Equ" redirects here. For other uses, see EQU.
Equuleus
Constellation
Equuleus
List of stars in Equuleus
AbbreviationEqu
GenitiveEquulei
Pronunciation/ɪˈkwuːliəs/ Equúleus, genitive /ɪˈkwuːliaɪ/
Symbolismthe pony
Right ascension20h 56m 10.9212s–21h 26m 20.0331s[1]
Declination13.0390635°–2.4773185°[1]
QuadrantNQ4
Area72 sq. deg. (87th)
Main stars3
Bayer/Flamsteed
stars		10
Stars with planets2
Stars brighter than 3.00m0
Stars within 10.00 pc (32.62 ly)0
Brightest starα Equ (Kitalpha) (3.92m)
Messier objects0
Meteor showers0
Bordering
constellations		Aquarius
Delphinus
Pegasus
Visible at latitudes between +90° and −80°.
Best visible at 21:00 (9 p.m.) during the month of September.

Equuleus is a faint constellation located just north of the celestial equator. Its name is Latin for "little horse", a foal. It was one of the 48 constellations listed by the 2nd century astronomer Ptolemy, and remains one of the 88 modern constellations. It is the second smallest of the modern constellations (after Crux), spanning only 72 square degrees. It is also very faint, having no stars brighter than the fourth magnitude.

Notable features

[edit]
The constellation Equuleus as it can be seen by the naked eye.
The constellation Equuleus, color and contrast enhanced.

Stars

[edit]
Further information: List of stars in Equuleus

The brightest star in Equuleus is α Equulei, traditionally called Kitalpha, a yellow star magnitude 3.9, 186 light-years from Earth. Its traditional name means "the section of the horse".[2]

There are few variable stars in Equuleus. Only around 25 are known, most of which are faint. γ Equulei is an α2 CVn variable star, ranging between magnitudes 4.58 and 4.77[3] over a period of around 12½ minutes. It is a white star 115 light-years from Earth, and has an optical companion of magnitude 6.1, 6 Equulei. It is divisible in binoculars.[2] 6 Equulei is an astrometric binary system itself,[4] with an apparent magnitude of 6.07.[5] R Equulei is a Mira variable that ranges between magnitudes 8.0 and 15.7[6] over nearly 261 days. It has a spectral type of M3e-M4e[6] and has an average B-V colour index of +1.41.[7]

Equuleus contains some double stars of interest. γ Equulei consists of a primary star with a magnitude around 4.7 (slightly variable) and a secondary star of magnitude 11.6, separated by 2 arcseconds. ε Equulei is a triple star also designated 1 Equulei. The system, 197 light-years away, has a primary of magnitude 5.4 that is itself a binary star; its components are of magnitude 6.0 and 6.3 and have a period of 101 years. The secondary is of magnitude 7.4 and is visible in small telescopes. The components of the primary are becoming closer together and will not be divisible in amateur telescopes beginning in 2015.[2] δ Equulei is a binary star with an orbital period of 5.7 years, which at one time was the shortest known orbital period for an optical binary. The two components of the system are never more than 0.35 arcseconds apart.

Deep-sky objects

[edit]

Due to its small size and its distance from the plane of the Milky Way, Equuleus is rather devoid of deep sky objects. Some very faint galaxies in the NGC catalog between magnitudes 13 and 15 include NGC 7015, NGC 7040, and NGC 7046. NGC 7045 is a triple star that was mistaken as a nebula by its discoverer, John Herschel.[8] Other faint galaxies in the IC Catalog include IC 1360, IC 1361, IC 1364, IC 1367, IC 1375, and IC 5083. IC 1365 is a group of galaxies. The magnitudes of these objects vary from 14.5 to 15.5, making them hard to see in even the largest of amateur telescopes.[9]

Mythology

[edit]
Seen in Urania's Mirror (1825)

In Greek mythology, one myth associates Equuleus with the foal Celeris (meaning "swiftness" or "speed"), who was the offspring or brother of the winged horse Pegasus. Celeris was given to Castor by Mercury. Other myths say that Equuleus is the horse struck from Poseidon's trident, during the contest between him and Athena when deciding which would be the superior. Because this section of stars rises before Pegasus, it is often called Equus Primus, or the First Horse. Equuleus is also linked to the story of Philyra and Saturn.[10]

Created by Hipparchus and included by Ptolemy, it abuts Pegasus; unlike the larger horse, it is depicted as a horse's head alone.[2] [11]

Equivalents

[edit]

In Chinese astronomy, the stars that correspond to Equuleus are located within the Black Tortoise of the North (北方玄武, Běi Fāng Xuán Wǔ).[12]

See also

[edit]

References

[edit]
  • "Equuleus". The Constellations. International Astronomical Union.
  • Burnham, Robert (1978). Burnham's Celestial Handbook: An observer's guide to the universe beyond the solar system, vol 2. Dover Publications ISBN 0-486-23567-X
  • Hoffleit+ (1991) V/50 The Bright Star Catalogue, 5th revised ed, Yale University Observatory, Strasbourg astronomical Data Center
  • Ridpath, Ian; Tirion, Wil (2001), Stars and Planets Guide, Princeton University Press, ISBN 0-691-08913-2
  • Ian Ridpath & Wil Tirion (2007). Stars and Planets Guide, Collins, London. ISBN 978-0-00-725120-9. Princeton University Press, Princeton. ISBN 978-0-691-13556-4.
  1. ^ a b IAU, The Constellations, Equuleus.
  2. ^ a b c d Ridpath & Tirion 2001, pp. 144–145.
  3. ^ Samus, N. N.; Durlevich, O. V.; et al. (2009). "VizieR Online Data Catalog: General Catalogue of Variable Stars (Samus+ 2007-2013)". VizieR On-line Data Catalog: B/GCVS. Originally Published in: 2009yCat....102025S. 1. Bibcode:2009yCat....102025S.
  4. ^ Frankowski, A.; Jancart, S.; Jorissen, A. (March 2007), "Proper-motion binaries in the Hipparcos catalogue. Comparison with radial velocity data", Astronomy and Astrophysics, 464 (1): 377–392, arXiv:astro-ph/0612449, Bibcode:2007A&A...464..377F, doi:10.1051/0004-6361:20065526, S2CID 14010423
  5. ^ Johnson, H. L.; et al. (1966), "UBVRIJKL photometry of the bright stars", Communications of the Lunar and Planetary Laboratory, 4 (99): 99, Bibcode:1966CoLPL...4...99J
  6. ^ a b Samus, N. N.; Durlevich, O. V.; et al. (2009), "VizieR Online Data Catalog: General Catalogue of Variable Stars (Samus+ 2007-2013)", VizieR On-line Data Catalog: B/GCVS. Originally Published in: 2009yCat....102025S, 1: B/gcvs, Bibcode:2009yCat....102025S.
  7. ^ Zacharias, N.; et al. (2012), "The fourth US Naval Observatory CCD Astrograph Catalog (UCAC4)", VizieR On-line Data Catalog, 1322 (2): 44, arXiv:1212.6182, Bibcode:2012yCat.1322....0Z, doi:10.1088/0004-6256/145/2/44, S2CID 119299381.
  8. ^ "NGC 7045 Basic Information". The NGC/IC Project. Retrieved 2024-03-25.
  9. ^ "Deep sky objects in Equuleus - Full list". The Sky Live. Retrieved 2024-03-25.
  10. ^ Olcott, William Tyler (2004). Star lore of all ages : myths, legends, and facts. Fred Schaaf (Dover ed.). Mineola, N.Y.: Dover Publications. p. 297. ISBN 978-0-486-14080-3. OCLC 947036847.
  11. ^ Evans, James "The History and Practice of Ancient Astronomy" Oxford University Press, 1998.
  12. ^ (in Chinese) AEEA (Activities of Exhibition and Education in Astronomy) 天文教育資訊網 2006 年 5 月 15 日
[edit]
Wikimedia Commons has media related to Equuleus.
Retrieved from "https://en.wikipedia.org/enwiki/w/index.php?title=Equuleus&oldid=1248088543"