Ross 154

Ross 154
Ross 154 is located in the constellation Sagittarius.
Ross 154 is located in the constellation Sagittarius.
Ross 154
Location of Ross 154 in the constellation Sagittarius

Observation data
Epoch J2000      Equinox J2000
Constellation Sagittarius
Right ascension 18h 49m 49.36378s[1]
Declination –23° 50′ 10.4474″[1]
Apparent magnitude (V) 10.44[2]
Characteristics
Spectral type M3.5V[2]
B−V color index 1.76[3]
Variable type Flare star[4]
Astrometry
Radial velocity (Rv)−11.12±0.57[1] km/s
Proper motion (μ) RA: +639.368 mas/yr[1]
Dec.: –193.958 mas/yr[1]
Parallax (π)336.0266 ± 0.0317 mas[1]
Distance9.7063 ± 0.0009 ly
(2.9760 ± 0.0003 pc)
Absolute magnitude (MV)13.07[2]
Details
Mass0.177 ± 0.004[5] M☉
Radius0.200 ± 0.008[5] R☉
Luminosity0.004015±0.000048[5] L☉
Surface gravity (log g)5.00 ± 0.05[6] cgs
Temperature3,248+68
−66[5] K
Metallicity [Fe/H]-0.25[7] dex
Rotation2.848 ± 0.001[8] days
Rotational velocity (v sin i)3.5 ± 1.5[7] km/s
Ageunder 1[7] Gyr
Other designations
CD−23° 14742, GCTP 4338, GJ 729, HIP 92403, LHS 3414, V1216 Sagittarii.[9]
Database references
SIMBADdata

Ross 154 (V1216 Sgr) is a star in the southern zodiac constellation of Sagittarius. It has an apparent visual magnitude of 10.44,[2] making it much too faint to be seen with the naked eye. At a minimum, viewing Ross 154 requires a telescope with an aperture of 6.5 cm (3 in) under ideal conditions.[10] The distance to this star can be estimated from parallax measurements, which places it at 9.71 light-years (2.98 parsecs) away from Earth.[1] It is the nearest star in the southern constellation Sagittarius, and one of the nearest stars to the Sun.

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  2. ^ a b c d Cite error: The named reference RECONS was invoked but never defined (see the help page).
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  5. ^ a b c d Cite error: The named reference Pineda2021 was invoked but never defined (see the help page).
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  7. ^ a b c Cite error: The named reference apj676 was invoked but never defined (see the help page).
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  9. ^ Cite error: The named reference SIMBAD was invoked but never defined (see the help page).
  10. ^ Cite error: The named reference mills1994 was invoked but never defined (see the help page).