Gliese 649

Coordinates: Sky map 16h 58m 08.85s, +25° 44′ 38.97″
Source: Wikipedia, the free encyclopedia.
Gliese 649
Observation data
Epoch J2000.0      Equinox J2000.0
Constellation Hercules[1]
Right ascension 16h 58m 08.850s[2]
Declination +25° 44′ 38.97″[2]
Apparent magnitude (V) 9.655[3]
Characteristics
Evolutionary stage Main sequence
Spectral type M1.0V[3]
Apparent magnitude (B) 11.222[1]
Apparent magnitude (R) 8.80[1]
Apparent magnitude (I) 8.000[1]
Apparent magnitude (J) 6.448[3]
Apparent magnitude (H) 5.865[3]
Apparent magnitude (K) 5.624[3]
B−V color index 1.48[3]
V−R color index 0.8
R−I color index 0.8
Distance
33.892 ± 0.009 ly
(10.391 ± 0.003 pc)
Absolute magnitude (MV)9.63[1]
Details
Gyr
TYC 2063-00479-1, 2MASS J16580884+2544392[6]
Database references
Exoplanet Archive
data
ARICNSdata

Gliese 649 is a small

light years based on parallax, and is drifting further away with a radial velocity of 3.8 km/s.[2]

This is an

rotation period of 24.9 days.[3]

Planetary system

A Saturn-mass planet was detected around the red dwarf star by J. A. Johnson and associates in 2010.

apastron
positions of 0.8 and 1.49 AU respectively, the planet could likely show seasonal temperature changes.

Debris disk

Using results from the Herschel Space Observatory survey of 21 late-type stars carried out in 2010, a debris disk was discovered between approximately 6 and 30 AU. The disk was not detected at 22µm by NASA's Wide-field Infrared Survey Explorer so therefore it is likely to be below 100 Kelvin and similar to the Kuiper belt. The disk was marginally resolved, appearing very asymmetric, and so is probably consistent with being closer to edge-on, rather than face-on, in its inclination.[8]

The Gliese 649 planetary system[3][8]
Companion
(in order from star) 		Mass Semimajor axis
(AU) 		Orbital period
(days) 		Eccentricity Inclination Radius
b ≥0.258+0.023
−0.022 MJ 		1.112+0.035
−0.037 		600.1±1.7 0.083+0.068
−0.055 		— —
Kuiper belt ~6–~30 AU ~45-90° —

References

  1. ^
    S2CID 119257644
    .
  2. ^
    S2CID 244398875
    . Gaia DR3 record for this source at VizieR.
  3. ^
    S2CID 259095781
    .
  4. ^
    S2CID 235435757
    . 40.
  5. doi:10.1093/mnras/stad343
    .
  6. ^ "9 Cet", SIMBAD, Centre de données astronomiques de Strasbourg, retrieved 2015-12-10.
  7. S2CID 119254409
    .
  8. ^
    S2CID 62879401
    .

See also


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