HIP 41378

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HIP 41378
Observation data
Epoch J2000      Equinox J2000
Constellation
Cancer
Right ascension 08h 26m 27.84909s[1]
Declination +10° 04′ 49.3342″[1]
Apparent magnitude (V) 8.92[2]
Characteristics
Evolutionary stage Main sequence[3]
Spectral type F8[4]
Distance
345.7 ± 0.8 ly
(106.0 ± 0.2 pc)
Details
Rotational velocity (v sin i)
5.7[6] km/s
PPM 125260, YZ 10 3402, AG+10 1097, EPIC 211311380[7]
Database references
SIMBADdata

HIP 41378 is a

constellation of Cancer. The star has an apparent magnitude of 8.92. This F-type main sequence dwarf has a mass of 1.15 M☉ and a radius of 1.25 R☉. It has a surface temperature of about 6,251 K
.

Planetary system

In 2016, the K2 Kepler mission discovered five planets around HIP 41378, with sizes ranging from 2 times the size of Earth to the size of Jupiter, out to about 1 AU for the outermost planet.[8] The semi-major axes were not known until K2 Haute-Provence Observatory radial velocity data was obtained in 2019. Also, a sixth non-transiting planet, HIP 41378 g, was discovered, along with speculation that additional planets may exist between HIP 41378 g and HIP 41378 d. The planet HIP 41378 f was also found to likely have optically-thick rings or a highly extended atmosphere.[3][9]

The HIP 41378 planetary system[3][10]
Companion
(in order from star) 		Mass Semimajor axis
(AU) 		Orbital period
(days) 		Eccentricity Inclination Radius
b 6.89 ± 0.88 M🜨 0.1283 15.57208 ± 0.00002 0.07 ± 0.06 88.75 ± 0.13° 2.17 ± 0.28 R🜨
c 4.4 ± 1.1 M🜨 0.2161 31.706038 ± 0.00006 0.04 88.477 ± 0.06° 2.727 ± 0.06 R🜨
g 7.0 ± 1.5 M🜨 0.3227 ± 0.0036 62.06 ± 0.32 0.06 — —
d <4.6 M🜨 0.88 ± 0.01 278.3618 ± 0.0005 0.06 ± 0.06 89.80 ± 0.02° 3.54 ± 0.06 R🜨
e 12 ± 5 M🜨 1.06 ± 0.03 369 ± 10 0.14 ± 0.09 89.84 ± 0.07° 4.92 ± 0.09 R🜨
f 12 ± 3 M🜨 1.37 ± 0.02 542.07975 ± 0.00014 0 89.971 ± 0.01° 9.2 ± 0.1 R🜨

See also

References

  1. ^
    S2CID 244398875
    . Gaia DR3 record for this source at VizieR.
  2. Bibcode:2000A&A...355L..27H
    .
  3. ^
    arXiv:1911.07355 [astro-ph.EP
    ].
  4. Bibcode:1952CoRut..32....1H
    .
  5. doi:10.1051/0004-6361/201833051. Gaia DR2 record for this source at VizieR
    .
  6. ^
    S2CID 55674757
    .
  7. ^ "HIP 41378". SIMBAD. Centre de données astronomiques de Strasbourg.
  8. S2CID 8794583
    .
  9. ISSN 0004-6361
    .
  10. ^ exoplanet.eu Planet HIP 41378 g
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