Gliese 754

Coordinates: Sky map 19h 20m 47.98349s, −45° 33′ 29.6292″
Source: Wikipedia, the free encyclopedia.
Gliese 754
Observation data
Epoch J2000.0      Equinox J2000.0
Constellation Telescopium
Right ascension 19h 20m 47.98349s[1]
Declination −45° 33′ 29.6292″[1]
Apparent magnitude (V) 12.25[2]
Characteristics
Spectral type M4V[2]
Distance
19.272 ± 0.007 ly
(5.909 ± 0.002 pc)
Details
dex
Rotation132.651 days
LTT 7652, 2MASS J19204795-4533283[7]
Database references
SIMBADdata
Gliese 754 is located in the constellation Telescopium
Gliese 754 is located in the constellation Telescopium
Gliese 754
Location of Gliese 754 in the constellation Telescopium

Gliese 754 is a dim

apparent visual magnitude of 12.25,[2] which requires a telescope to view. The star is located at a distance of 19.3 light-years from the Sun based on parallax,[1] and it is drifting further away with a radial velocity of +7 km/s.[3] It is one of the hundred closest stars to the Solar System. Calculations of its orbit around the Milky Way showed that it is eccentric, and indicate that it might be a thick disk object.[8]

The

luminosity of the Sun from its photosphere at an effective temperature of around 3,202 K.[6]

Planetary System

In June 2019, a candidate exoplanet was reported in orbit around Gliese 754. It was detected using the Doppler method and is orbiting at a distance of 0.28 AU with a period of 78 days. The orbit is essentially circular, to within the margin of error.[10] The habitable zone for this star ranges from 0.05 AU to 0.14 AU;[5] inside the orbit of this proposed companion.

The Gliese 754 planetary system
Companion
(in order from star) 		Mass Semimajor axis
(AU) 		Orbital period
(days) 		Eccentricity Inclination Radius
b
 (unconfirmed) 		≥9.8+4.6
−5.2 M🜨 		0.277+0.025
−0.028 		78.37+0.55
−0.47 		0.03+0.20
−0.03 		— —

References

  1. ^
    doi:10.1051/0004-6361/201833051. Gaia DR2 record for this source at VizieR
    .
  2. ^
    S2CID 53983430
    .
  3. ^
    S2CID 119209638
    . 217.
  4. doi:10.1051/0004-6361/202039657e). Gaia EDR3 record for this source at VizieR
    .
  5. ^
    S2CID 116365802
    .
  6. ^
    S2CID 119118088
    . 97.
  7. ^ "L 347-14". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2020-12-12.
  8. Bibcode:2010JRASC.104..223I
    .
  9. doi:10.1093/mnras/sty1670
    .
  10. Bibcode:2019arXiv190604644T. {{cite journal}}: Cite journal requires |journal= (help
    )
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