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| ra = {{RA|13|24|51.8439}}<ref name=TRC>{{cite journal|author1=Hog, E.|date=1998|title=The Tycho Reference Catalogue |journal=Astronomy and Astrophysics|volume=335|bibcode=1998A&A...335L..65H}}</ref>
| ra = {{RA|13|24|51.8439}}<ref name=TRC>{{cite journal|author1=Hog, E.|date=1998|title=The Tycho Reference Catalogue |journal=Astronomy and Astrophysics|volume=335|bibcode=1998A&A...335L..65H}}</ref>
| dec = {{DEC|+54|53|50.905}}<ref name=TRC/>
| dec = {{DEC|+54|53|50.905}}<ref name=TRC/>
| appmag_v = +7.58<ref name="SIMBAD">{{cite simbad|title=Stella Ludoviciana| access-date=26 December 2016}}</ref>
| appmag_v = +7.58<ref name=tycho2>{{cite journal |bibcode=2000A&A...355L..27H }}</ref>
}}
}}
{{Starbox character
{{Starbox character

Revision as of 10:43, 22 September 2019

Sidus Ludoviciana
Observation data
Epoch J2000.0      Equinox J2000.0
Constellation Ursa Major
Right ascension 13h 24m 51.8439s[1]
Declination +54° 53′ 50.905″[1]
Apparent magnitude (V) +7.58[2]
Characteristics
Spectral type A8/F0III[3]
Astrometry
Radial velocity (Rv)−4.9[3] km/s
Proper motion (μ) RA: −19.910[4] mas/yr
Dec.: −5.202[4] mas/yr
Parallax (π)10.8536 ± 0.0280 mas[4]
Distance300.5 ± 0.8 ly
(92.1 ± 0.2 pc)
Details
Radius1.61[4] R
Luminosity6.159[4] L
Temperature7,167[4] K
Other designations
Sidus Ludoviciana, HD 116798, SAO 28748, BD+55°1602, GC 18150, TYC 3850-257-1, 2MASS J13245185+5453509
Database references
SIMBADdata

Sidus Ludoviciana /ˈsdəs ˌljdˌvɪsiˈnə/[5] is an 8th-magnitude star in the asterism of the Big Dipper in the constellation Ursa Major, halfway between Mizar and Alcor. It was discovered on 2 December 1722 by Johann Georg Liebknecht, who mistook it for a planet and named it after Louis V, Landgrave of Hesse-Darmstadt. A line-of-sight companion with Mizar and Alcor (with a spectral type similar to the latter), it is roughly five times more distant.[6] It has the spectral type A8/F0 III.[3]

References

  1. ^ a b Hog, E. (1998). "The Tycho Reference Catalogue". Astronomy and Astrophysics. 335. Bibcode:1998A&A...335L..65H.
  2. ^ . Bibcode:2000A&A...355L..27H. {{cite journal}}: Cite journal requires |journal= (help); Missing or empty |title= (help)
  3. ^ a b c Grenier, S.; Baylac, M.-O.; Rolland, L.; Burnage, R.; Arenou, F.; Briot, D.; Delmas, F.; Duflot, M.; Genty, V.; Gómez, A. E.; Halbwachs, J.-L.; Marouard, M.; Oblak, E.; Sellier, A. (1999). "Radial velocities. Measurements of 2800 B2-F5 stars for HIPPARCOS" (PDF). Astronomy and Astrophysics Supplement. 137 (3): 451. Bibcode:1999A&AS..137..451G. doi:10.1051/aas:1999489.
  4. ^ a b c d e f Brown, A. G. A.; et al. (Gaia collaboration) (August 2018). "Gaia Data Release 2: Summary of the contents and survey properties". Astronomy & Astrophysics. 616. A1. arXiv:1804.09365. Bibcode:2018A&A...616A...1G. doi:10.1051/0004-6361/201833051. Gaia DR2 record for this source at VizieR.
  5. ^ Fine Gardening, The Plant Guide, Artemisia ludoviciana
  6. ^ "A New View Of Mizar". Retrieved 2016-10-03.