HD 98649

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HD 98649
Observation data
Epoch J2000.0      Equinox J2000.0
Constellation Crater
Right ascension 11h 20m 51.76855s[1]
Declination −23° 13′ 02.4295″[1]
Apparent magnitude (V) +8.00[2]
Characteristics
Spectral type G3/5V[3]
B−V color index +0.658[3]
Distance
137.5 ± 0.1 ly
(42.16 ± 0.04 pc)
Absolute magnitude (MV)+4.91[2]
Details
Gyr
LTT 4199[5]
Database references
Exoplanet Archive
data

HD 98649 is a

″·yr−1.[6]

The

magnetic activity in the chromosphere is minimal.[2]

Planetary system

From 1998 to 2012, the star was under observance from the

apoastron, or 250 milliarcseconds of separation as viewed from Earth.[2]

Using astrometry from Gaia, astronomers were able to deduce the true mass of HD 98649 b as 9.7 MJ, somewhat higher than its minimum mass deduced from radial velocity measurements.[4][7]

The HD 98649 planetary system[4]
Companion
(in order from star) 		Mass Semimajor axis
(AU) 		Orbital period
(years) 		Eccentricity Inclination Radius
b 9.7+2.3
−1.9 MJ 		5.97+0.24
−0.21 		14.74+0.88
−0.75 		0.852+0.033
−0.022 		43.7+13
−8.1° 		—

References

  1. ^
    S2CID 244398875
    . Gaia DR3 record for this source at VizieR.
  2. ^
    S2CID 59467665
    .
  3. ^
    S2CID 91184450
    . A71.
  4. ^
    S2CID 237592581
    .
  5. ^ "HD 98649". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2015-12-20.
  6. Bibcode:1995yCat.1098....0L
    .
  7. S2CID 251864022
    .
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