CD-44 170

Coordinates: Sky map 00h 39m 58.8243s, −44° 15′ 11.5824″
Source: Wikipedia, the free encyclopedia.
CD-44 170
Observation data
Epoch J2000      Equinox J2000
Constellation Phoenix
Right ascension 00h 39m 58.8243s[1]
Declination −44° 15′ 11.5824″[1]
Apparent magnitude (V) 11.401
Characteristics
Evolutionary stage
main-sequence star
Spectral type M0.5V[2]
Distance
77.05 ± 0.05 ly
(23.62 ± 0.01 pc)
Details
dex
Rotation31.8 d[2]
TYC 7531-1014-1, 2MASS J00395880-4415117[1]
Database references
SIMBADdata

CD-44 170, also known as Gliese 27.1, Gliese 9018 and HIP 3143, is an

M-type main-sequence star. Its surface temperature is 3,604 K (6,028 °F; 3,331 °C)±72 K. The star's concentration of heavy elements is similar to that of the Sun.[6]

Planetary system

In 2014, a planet named Gliese 27.1 b with an orbital period of 16 days was announced. It was discovered using the

radial velocity method.[7] The planetary equilibrium temperature is 406 K (271 °F; 133 °C).[5] The planet's existence was doubted until 2020 because the putative orbital period is equal to half of the star's rotational period.[2]

The Gliese 27.1 planetary system[5]
Companion
(in order from star) 		Mass Semimajor axis
(AU) 		Orbital period
(days) 		Eccentricity Inclination Radius
b (disputed) > 13+4.1
−6.6 M🜨 		0.101+0.009
−0.013 		15.8190+0.0049
−0.0026 		— — >3.63 R🜨

References

  1. ^ a b c "CD-44 170". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2021-04-26.
  2. ^
    S2CID 210064560
    .
  3. ^
    doi:10.1051/0004-6361/202039657e). Gaia EDR3 record for this source at VizieR
    .
  4. S2CID 73538034
    .
  5. ^
    S2CID 204904780
    .
  6. ^
    doi:10.3847/1538-4357/ab1fe9
    .
  7. doi:10.1093/mnras/stu358
    .


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