HD 38, a type M2 star in Andromeda

HD 38 (HIP 473)

HD 38 is a type M2 star in the constellation Andromeda. At 37 light years away, it shines at an apparent visual magnitude of 8.20. HD 38 is a multiple-star system. It is moving through the Galaxy at a speed of 48.3 km/s relative to the Sun. Its projected Galactic orbit carries it between 19,800 and 26,100 light years from the center of the Galaxy.

Sky position: RA 0h 5.7m, Dec +45° 48.6'

Common designations: HIP 473, HD 38

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Galactic Orbit of HD 38
(compared to the Sun)

E

ccentricity: 13.8% vs. 16.0%

Angle φ : -118.9°vs. 26.0°

Semi-major axis : 7,046 pc vs. 8,686 pc

Semi-minor axis: 6,979 pc vs. 8,574 pc

Focus-to-center

: 969 pcvs. 1,388 pc

Semilatus rectum : 6,912 pc vs. 8,464 pc

Perigalacticon: 6,077 pc vs. 7,297 pc

Apogalacticon

: 8,014 pcvs. 10,074 pc
  Some Tabulated XHIP Data for HD 38
(see also: SIMBAD)

Astrometry
2007A&A...474..653V

Position	Proper Motion
Right Ascension:	1.41782131° ±0.89 mas	887.48 ±1.02 mas/yr.
Declination:	45.81245486° ±0.81 mas	-152.02 ±1.04 mas/yr.
Galactic Longitude:	114.64836718°	844.37 mas/yr.
Galactic Latitude:	-16.32189883°	-312.69 mas/yr.

Parallax: 88.44 ± 1.56 mas

Spectrography

Spectral Type: M2 1947AnDea...5....1L.

Radial Velocity: 1.49 ±0.10 km/s [A rating] 2002ApJS..141..503N, 1992A&A...256..121T.
This star is a spectroscopic binary with a solved orbit.

Iron Abundance [Fe/H]: n/a

Photometry
 

band	magnitude	Abs. Mag.
U
B	9.61	9.34
V	8.20	7.93
R
I	6.60	6.33
J
H
K

B-V: +1.41 V-I: +1.60

Derivations

Heliocentric distance: 11.30 pc (1.8% margin of error)

Galactocentric distance: 7,405 pc

Transverse velocity: 48.2 km/s

3D heliocentric position and motion:

toward:	Galactic center	Galactic rotation	North Galactic Pole
Position ( X, Y, Z)	-4.5 pc	9.9 pc	-3.2 pc
Velocity (U, V, W)	-39.8 km/s	-21.8 km/s	-16.5 km/s