GJ 445 (HIP 57544)

GJ 445 is a red main-sequence star in the constellation Camelopardalis. It lies about 17 light years away. It is moving through the Galaxy at a speed of 113.7 km/s relative to the Sun.

Sky position: RA 11h 47.7m, Dec +78° 41.5'

Common designations: GJ 445, HIP 57544, Gaia DR3 1129149723913123456

GJ 445 has the spectral type M4.0V. M-type stars are cool red stars below about 3,900 K whose spectra are dominated by titanium oxide molecular bands. Red dwarfs, red giants and red supergiants all fall in this class. Its luminosity class V means it is a main-sequence (dwarf) star, still fusing hydrogen into helium in its core like the Sun.

How to find GJ 445 in the sky

GJ 445 lies in Camelopardalis. With a declination of +78° 41.5', it is visible from the entire Northern Hemisphere and from the Southern Hemisphere down to about latitude 11° S. Observers poleward of latitude 11° N see it as circumpolar: it never sets. It is highest in the sky at local midnight around April, which makes the weeks around that month the best time to observe it.

Tabulated data for GJ 445

Astrometry and spectroscopy

Right Ascension (J2000)	176.92244548° (11h 47.7m)
Declination (J2000)	78.69116006° (+78° 41.5')
Galactic Longitude	126.84720974°
Galactic Latitude	37.94806845°
Proper motion RA	748.42 mas/yr
Proper motion Dec	480.80 mas/yr
Parallax	190.33 ± 0.02 mas
Spectral Type	M4.0V
Radial Velocity	-111.51 km/s

Photometry

Band	Magnitude	Abs. Mag.
B	12.74	14.14
R	10.00	11.40
J	6.72	8.12
H	6.22	7.61
K	5.95	7.35

Derivations

Heliocentric distance: 5.25 pc (17 light years) (0.0% margin of error)
Transverse velocity: 22.2 km/s
Space velocity relative to the Sun: 113.7 km/s
Galactic position (X, Y, Z): -2.5 pc, 3.3 pc, 3.2 pc
Galactic velocity (U, V, W): 67.8 km/s, -54.8 km/s, -73.0 km/s

Data: Extended Hipparcos Compilation (XHIP) and SIMBAD.