HD 81040 b

{{Infobox planet

| extrasolarplanet = yes

| name = HD 81040 b

| image = HD 81040 Radial Velocity.png

| image_scale = 1.5

| image_alt = Radial velocity curve of HD 81040 b

| caption = Radial velocity curve of HD 81040 b

| discoverer = Sozzetti et al.

| discovery_site = Observatoire de Haute-Provence
in France

| discovered = November 24, 2005

| discovery_method = Doppler Spectroscopy

| orbit_ref =

| apsis = astron

| semimajor = {{convert|1.946|±|0.014|AU|km|abbr=on}}

| eccentricity = {{val|0.525|0.024|0.026}}

| period = {{convert|1004.7|±|3.0|d|yr|lk=on|abbr=off}}

| inclination = {{val|111.4|4.4|4.7|u=deg}}

| asc_node = {{val|19.2|5.0|4.8|u=deg}}

| time_periastron = {{val|245511.1|+10|-8.7}}

| arg_peri = {{val|73.1|4.3|u=deg}}

| semi-amplitude = 168 ± 9

| star = HD 81040

| mass = {{val|7.53|0.032|ul=Jupiter mass}}

}}

HD 81040 b is a massive gas giant exoplanet that orbits the star HD 81040, discovered in 2005 by radial velocity. Its orbital period is just over 1000 days. It has a semimajor axis of about 1.95 AU, and its orbit is quite eccentric, at a little over 0.5.

Astrometry of HD 81040 using Gaia, published in several papers, has determined an orbital inclination of about 111°. This, combined with the minimum mass, gives a true mass of {{jupiter mass|7.53|link=y}}. Since the inclination is high, there is a small chance that the planet transits.

File:HD 81040 Astrometry.png

References

{{Reflist|refs=

{{cite journal | title=A massive planet to the young disc star HD 81040 | url=http://www.aanda.org/articles/aa/full/2006/13/aa4303-05/aa4303-05.html | last1=Sozzetti | first1=A. | last2=Udry | first2=S. | last3=Zucker | first3=S. | last4=Torres | first4=G. | last5=Beuzit | first5=J. L. | last6=Latham | first6=D. W. | last7=Mayor | first7=M. | last8=Mazeh | first8=T. | last9=Naef | first9=D. | last10=Perrier | first10=C. | last11=Queloz | first11=D. | last12=Sivan | first12=J.-P. | display-authors=1 | journal=Astronomy and Astrophysics | volume=449 | issue=1 | pages=417–424 | year=2006 | arxiv=astro-ph/0511679 | bibcode=2006A&A...449..417S | doi=10.1051/0004-6361:20054303 | s2cid=7647622 }}

{{cite journal|doi=10.3847/1538-3881/ac27ab|title=Precise Masses and Orbits for Nine Radial-velocity Exoplanets|year=2021|last1=Li|first1=Yiting|last2=Brandt|first2=Timothy D.|last3=Brandt|first3=G. Mirek|last4=Dupuy|first4=Trent J.|last5=Michalik|first5=Daniel|last6=Jensen-Clem|first6=Rebecca|last7=Zeng|first7=Yunlin|last8=Faherty|first8=Jacqueline|author8-link=Jackie Faherty|last9=Mitra|first9=Elena L.|journal=The Astronomical Journal|volume=162|issue=6|page=266|arxiv=2109.10422|bibcode=2021AJ....162..266L|s2cid=237592581 |doi-access=free }}

{{cite web |url=https://www.cosmos.esa.int/web/gaia/iow_20220131 |title=Image of the Week: Astrometric Orbit of the Exoplanet-Host Star HD81040 |date=31 January 2022 |website=cosmos.esa.int |publisher=ESA/Gaia/DPAC/CU4-CU3 |access-date=14 September 2022}}

{{cite journal | arxiv = 2206.05595| last1 = Gaia Collaboration| last2 = Arenou| first2 = F.| last3 = Babusiaux| first3 = C.| last4 = Barstow| first4 = M. A.| last5 = Faigler| first5 = S.| last6 = Jorissen| first6 = A.| last7 = Kervella| first7 = P.| last8 = Mazeh| first8 = T.| last9 = Mowlavi| first9 = N.| last10 = Panuzzo| first10 = P.| last11 = Sahlmann| first11 = J.| last12 = Shahaf| first12 = S.| last13 = Sozzetti| first13 = A.| last14 = Bauchet| first14 = N.| last15 = Damerdji| first15 = Y.| last16 = Gavras| first16 = P.| last17 = Giacobbe| first17 = P.| last18 = Gosset| first18 = E.| last19 = Halbwachs| first19 = J. -L.| last20 = Holl| first20 = B.| last21 = Lattanzi| first21 = M. G.| last22 = Leclerc| first22 = N.| last23 = Morel| first23 = T.| last24 = Pourbaix| first24 = D.| last25 = Re Fiorentin| first25 = P.| last26 = Sadowski| first26 = G.| last27 = Ségransan| first27 = D.| last28 = Siopis| first28 = C.| last29 = Teyssier| first29 = D.| last30 = Zwitter| first30 = T.| title = Gaia Data Release 3| journal = Astronomy & Astrophysics| year = 2023| volume = 674| pages = A34| doi = 10.1051/0004-6361/202243782| s2cid = 249626026| display-authors = 1}}

{{cite journal |last1=Feng |first1=Fabo |last2=Butler |first2=R. Paul |display-authors=etal |date=August 2022 |title=3D Selection of 167 Substellar Companions to Nearby Stars |journal=The Astrophysical Journal Supplement Series |volume=262 |issue=21 |page=21 |doi=10.3847/1538-4365/ac7e57 |arxiv=2208.12720 |bibcode=2022ApJS..262...21F|s2cid=251864022 |doi-access=free }}

{{cite journal |last=Winn |first=Joshua N. |arxiv=2209.05516 |title=Joint Constraints on Exoplanetary Orbits from Gaia DR3 and Doppler Data |journal=The Astronomical Journal |date=September 2022|volume=164 |issue=5 |page=196 |doi=10.3847/1538-3881/ac9126 |bibcode=2022AJ....164..196W |s2cid=252211643 |doi-access=free }}

}}

Category:Leo (constellation)

Category:Giant planets

Category:Exoplanets discovered in 2005

Category:Exoplanets detected by radial velocity

Category:Exoplanets detected by astrometry

HD 81040 b

See also

References