HD 85512: Difference between revisions

HD 85512
	; Close-up of the sky around the star HD 85512.; Credit: ESO and Digitized Sky Survey 2.
Observation data; Epoch J2000 Equinox J2000
Constellation	Vela
Right ascension	09h 51m 07.0520s
Declination	−43° 30′ 10.0220″
Apparent magnitude (V)	7.66
Characteristics
Spectral type	K5V
U−B color index	1.12
B−V color index	1.18
V−R color index	0.71
Astrometry
Radial velocity (Rv)	−9.6 km/s
Proper motion (μ)	RA: 461.446±0.103 mas/yr ; Dec.: −472.010±0.116 mas/yr
Parallax (π)	88.6158 ± 0.0406 mas
Distance	36.81 ± 0.02 ly ; (11.285 ± 0.005 pc)
Absolute magnitude (MV)	7.39
Details
Mass	0.69 M☉
Radius	0.533 ± 0.04 R☉
Luminosity (bolometric)	0.126 ± 0.008 L☉
Surface gravity (log g)	4.39 ± 0.28 cgs
Temperature	4715 ± 102 K
Metallicity	44–50%
Rotation	47.13 ± 6.98
Rotational velocity (v sin i)	<3 km/s
Age	5.61 ± 0.61 Gyr
Other designations
	CD−42°5678, GJ 370, HD 85512, HIP 48331, LHS 2201, 2MASS J09510700-4330097
Database references
SIMBAD	data

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Revision as of 22:45, 22 September 2019

HD 85512 is a solitary K-type main-sequence star located approximately 37 light-years away in the constellation Vela. It is approximately one billion years older than the Sun. It is extremely chromospherically inactive, only slightly more active than Tau Ceti. The star is known to host one low-mass planet.

Planetary system

On August 19, 2011, a ≥3.6 Earth-mass planet was discovered using HARPS that is "just inside" the habitable zone, along with the planets of 82 G. Eridani and HR 7722 c.^[5] The planet could be potentially cool enough to host liquid water if the planet exhibits more than 50% cloud coverage. HD 85512 b is currently the fifth best candidate for habitability according to the Habitable Exoplanets Catalog.

The HD 85512 planetary system^[5]
Companion (in order from star)	Mass	Semimajor axis (AU)	Orbital period (days)	Eccentricity	Inclination	Radius
b	≥3.6 $M$ _🜨	0.26 ± 0.005	58.43 ± 0.13	0.11 ± 0.1	—	—

References

^ ^a ^b ^c ^d ^e 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.
^ Holmberg, J.; et al. (July 2009), "The Geneva-Copenhagen survey of the solar neighbourhood. III. Improved distances, ages, and kinematics", Astronomy and Astrophysics, 501 (3): 941–947, arXiv:0811.3982, Bibcode:2009A&A...501..941H, doi:10.1051/0004-6361/200811191.
^ "HD 85512". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2019-09-22.
^ "Fifty New Exoplanets Discovered by HARPS". ESO Science Release. 12 September 2011. Retrieved 13 September 2011.
^ ^a ^b Pepe, F.; et al. (2011). "The HARPS search for Earth-like planets in the habitable zone. I. Very low-mass planets around HD 20794, HD 85512, and HD 192310". Astronomy and Astrophysics. 534. A58. arXiv:1108.3447. Bibcode:2011A&A...534A..58P. doi:10.1051/0004-6361/201117055.

Notes

^ From $R={\sqrt {\frac {L}{4\pi \sigma T_{\rm {eff}}^{4}}}}$ , where $R$ is the radius, $L$ is the luminosity, $T_{\rm {eff}}$ is the effective surface temperature and $\sigma$ is the Stefan–Boltzmann constant.

External links

"ARICNS: 00766". ARICNS. Centre of Astronomy, Heidelberg University.

Template:Gliese 370

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[Gaia_DR2-1] 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.

[Holmberg2009-2] Holmberg, J.; et al. (July 2009), "The Geneva-Copenhagen survey of the solar neighbourhood. III. Improved distances, ages, and kinematics", Astronomy and Astrophysics, 501 (3): 941–947, arXiv:0811.3982, Bibcode:2009A&A...501..941H, doi:10.1051/0004-6361/200811191.

[Simbad-4] "HD 85512". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2019-09-22.

[5] "Fifty New Exoplanets Discovered by HARPS". ESO Science Release. 12 September 2011. Retrieved 13 September 2011.

[Pepe2011-6] Pepe, F.; et al. (2011). "The HARPS search for Earth-like planets in the habitable zone. I. Very low-mass planets around HD 20794, HD 85512, and HD 192310". Astronomy and Astrophysics. 534. A58. arXiv:1108.3447. Bibcode:2011A&A...534A..58P. doi:10.1051/0004-6361/201117055.

[3] From $R={\sqrt {\frac {L}{4\pi \sigma T_{\rm {eff}}^{4}}}}$ , where $R$ is the radius, $L$ is the luminosity, $T_{\rm {eff}}$ is the effective surface temperature and $\sigma$ is the Stefan–Boltzmann constant.

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@@ Line 43: / Line 43: @@
 }}
 {{Starbox catalog
+| names = {{odlist | 2MASS=J09510700-4330097 | CD=−42°5678 | GJ=370 | HD=85512 | HIP=48331 | LHS=2201 }}<ref name="Simbad"/>
-| names = [[Durchmusterung|CD]]-42&nbsp;5678, [[Gliese Catalogue of Nearby Stars|Gliese]]&nbsp;370, [[Henry Draper Catalogue|HD]]&nbsp;85512, [[Hipparcos#Published catalogues|HIP]]&nbsp;48331, [[Luyten Half-Second catalogue|LHS]]&nbsp;2201, [[Nearby Stars Database|NStars]]&nbsp;0951-4330
 }}
 {{Starbox reference
@@ Line 52: / Line 52: @@
 '''HD 85512''' is a solitary [[K-type main-sequence star]] located approximately 37 light-years away in the constellation [[Vela (constellation)|Vela]]. It is approximately one billion years older than the [[Sun]]. It is extremely [[chromosphere|chromospherically]] inactive, only slightly more active than [[Tau Ceti]]. The star is known to host one low-mass planet.
-== Planetary system ==
+==Planetary system==
 [[File:HD 85512 Planetary system.jpg|thumb|left|Artists's impression of [[HD 85512 b]].<ref>{{cite news|title=Fifty New Exoplanets Discovered by HARPS|url=http://www.eso.org/public/news/eso1134/|accessdate=13 September 2011|newspaper=ESO Science Release|date=12 September 2011}}</ref> Credit: [[ESO]]/M. Kornmesser.]]
@@ Line 70: / Line 70: @@
 {{Orbitbox end}}
-== References ==
+==References==
 {{reflist|refs=
@@ Line 85: / Line 85: @@
 <ref name="Pepe2011">{{cite journal | title=The HARPS search for Earth-like planets in the habitable zone. I. Very low-mass planets around HD 20794, HD 85512, and HD 192310 | url=http://www.aanda.org/articles/aa/full_html/2011/10/aa17055-11/aa17055-11.html | last1=Pepe | first1=F. | last2=Lovis | first2=C. | last3=Ségransan | first3=D. | last4=Benz | first4=W. | last5=Bouchy | first5=F. | last6=Dumusque | first6=X. | last7=Mayor | first7=M. | last8=Queloz | first8=D. | last9=Santos | first9=N. C. | last10=Udry | first10=S. | display-authors=1 | journal=Astronomy and Astrophysics | volume=534 | at=A58 | year=2011 | arxiv=1108.3447 | bibcode=2011A&A...534A..58P | bibcode-access=free | doi=10.1051/0004-6361/201117055 | doi-access=free }}</ref>
+<ref name="Simbad">{{cite simbad | title=HD 85512 | access-date=2019-09-22 }}</ref>
 }}
-== Notes ==
+==Notes==
 {{Reflist|group=note}}
-== External links ==
+==External links==
 * {{ARICNS link|id=4c00766|label='''ARICNS''': 00766}}