HD 18970

Last updated
HD 18970
Perseus constellation map.svg
Red circle.svg
Location of k Persei (circled)
Observation data
Epoch J2000       Equinox J2000
Constellation Perseus
Right ascension 03h 05m 32.41223s [1]
Declination 56° 42 20.5858 [1]
Apparent magnitude  (V)4.77 [2]
Characteristics
Spectral type G9.5III [3]
U−B color index +0.85 [4]
B−V color index +1.02 [4]
Astrometry
Radial velocity (Rv)-46.37 [5]  km/s
Proper motion (μ)RA: -12.72 [1]   mas/yr
Dec.: +70.04 [1]   mas/yr
Parallax (π)15.45 ± 0.27 [1]   mas
Distance 211 ± 4  ly
(65 ± 1  pc)
Absolute magnitude  (MV)0.72 [2]
Details
Mass 1.53 [6]   M
Radius 11 [6]   R
Luminosity 63.48 [2]   L
Surface gravity (log g)2.54 [6]   cgs
Temperature 4,900 [7]   K
Metallicity [Fe/H]-0.08 [2]   dex
Rotational velocity (v sin i)< 1.0 [8]  km/s
Other designations
k Persei, BD+56°767, FK5  2217, GC  3674, HIP  14382, HR  918, HD  18970, SAO  23791
Database references
SIMBAD data

HD 18970 is a class G9.5III [3] (yellow giant) star in the constellation Perseus. Its apparent magnitude is 4.77 [2] and it is approximately 211 light years away based on parallax. [1]

Related Research Articles

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1 Aurigae Star in the constellation Perseus

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Epsilon Monocerotis Star in the constellation Monoceros

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10 Leonis Minoris Star in the constellation Leo Minor

10 Leonis Minoris is a single, variable star in the northern constellation Leo Minor, located approximately 180 light years away based on parallax. It has the variable star designation SU Leonis Minoris; 10 Leonis Minoris is the Flamsteed designation. This body is visible to the naked eye as a faint, orange-hued star with a baseline apparent visual magnitude of 4.54. It is moving closer to the Earth with a heliocentric radial velocity of −12 km/s.

18 Monocerotis Star in the constellation Monoceros

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24 Scorpii Star in the constellation Ophiuchus

24 Scorpii is a star that was originally placed by John Flamsteed within the constellation of Scorpius but in now placed within the southeastern constellation of Ophiuchus. It is visible to the naked eye as a faint, yellow-hued point of light with an apparent visual magnitude of 4.91. Based on the trigonometric parallax published in Gaia Data Release 2, the star lies approximately 121 parsecs or 390 light years away. It is positioned near the ecliptic and thus is subject to lunar occultations.

11 Orionis Star in the constellation Orion

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31 Orionis Variable star in the constellation Orion

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72 Pegasi Star in the constellation Pegasus

72 Pegasi is a binary star system in the northern constellation of Pegasus. It is visible to the naked eye as a faint, orange-hued point of light with a combined apparent visual magnitude of 4.97. The system is located approximately 550 light years away from the Sun, based on parallax, but is drifting closer with a radial velocity of −25 km/s.

24 Persei Star in the constellation Perseus

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QZ Puppis Star in the constellation Puppis

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HD 63744 Star in the constellation Puppis

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HD 61772 Star in the constellation Puppis

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HD 50235 Star in the constellation Puppis

HD 50235 is a class K5III star located approximately 811 light years away, in the constellation Puppis. Its apparent magnitude is 4.99. HD 50235 made its closest approach to the Sun 7.8 million years ago, at the distance of 137 light years, during which it had an apparent magnitude of 1.13.

43 Sagittarii Star in the constellation of Sagittarius

43 Sagittarii is a single star in the southern constellation of Sagittarius. It has the Bayer designation d Sagittarii, while 43 Sagittarii is the Flamsteed designation. This object is visible to the naked eye as a faint, yellow-hued star with an apparent visual magnitude of 4.88. From parallax measurements, it is estimated to lie around 470 light years away from the Sun. The star is drifting further from the Earth with a heliocentric radial velocity of +15.2 km/s. It is located near the ecliptic and thus is subject to lunar occultations.

HD 190056 is a class K1III star in the constellation Sagittarius. Its apparent magnitude is 4.99 and it is approximately 291 light years away based on parallax.

Theta<sup>2</sup> Microscopii Star in the constellation Microscopium

Theta2 Microscopii is a class A0III star in the constellation Microscopium. Its apparent magnitude is 5.76 and it is approximately 390 light years away based on parallax. It is an Ap star, a chemically peculiar star with unusually strong metallic spectral lines.

HD 42540 Star in the constellation Pictor

HD 42540, also known as HR 2196, is a suspected variable star in the constellation Pictor. A class K2-3III orange giant, its apparent magnitude is 5.04 and it is approximately 362 light years away based on parallax.

Epsilon Octantis Variable star in the constellation Octans

Epsilon Octantis, Latinized from ε Octantis, is a star in the southern circumpolar constellation of Octans. It is a faintly visible to the naked eye with an apparent visual magnitude of 5.09. The annual parallax shift of 11.22 mas yields a distance estimate of around 291 light years. It is moving further from the Sun with a radial velocity of +11.7 km/s.

References

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