28 Vulpeculae

Last updated
28 Vulpeculae
Observation data
Epoch J2000.0       Equinox J2000.0
Constellation Vulpecula
Right ascension 20h 38m 31.9139s [1]
Declination +24° 06 57.4433 [1]
Apparent magnitude  (V)5.05 [2]
Characteristics
Evolutionary stage Subgiant
Spectral type B5IV [3]
U−B color index −0.53 [4]
B−V color index −0.14 [4]
Astrometry
Radial velocity (Rv)−22.6±1.2 [5]  km/s
Proper motion (μ)RA: 10.317±0.273 [1]   mas/yr
Dec.: −6.940±0.253 [1]   mas/yr
Parallax (π)5.8740 ± 0.1760  mas [1]
Distance 560 ± 20  ly
(170 ± 5  pc)
Absolute magnitude  (MV)−0.96 [5]
Details
Mass 5.0 [2]   M
Luminosity 713 [2]   L
Surface gravity (log g)3.77 [6]   cgs
Temperature 15,200 [2]   K
Metallicity [Fe/H]+0.02±0.04 [6]   dex
Rotational velocity (v sin i)285 [7]  km/s
Other designations
28 Vul, BD+23°4084, HD  196740, HIP  101868, HR  7894, SAO  88945 [8]
Database references
SIMBAD data

28 Vulpeculae is a single [9] star in the northern constellation of Vulpecula. It lies approximately 560 light years away and is visible to the naked eye as a faint, blue-white hued star with an apparent visual magnitude of 5.047. [2] The star is moving closer to the Sun with a heliocentric radial velocity of −23 km/s, and may come as close as 198 light-years in 5.9 million years. [5]

This is a subgiant star with a spectral class of B5 IV, [3] indicating a hot massive star that has started to evolve away from the main sequence after exhausting it core hydrogen. It has been included in a list of the least variable stars observed with the Hipparcos satellite; its brightness varied by no more than 0.0005 magnitudes in the Hipparcos passband. [10] The star has five [2] times the mass of the Sun and is spinning rapidly with a projected rotational velocity of 285 km/s. [7] It is radiating 713 times the Sun's luminosity from its photosphere at an effective temperature of 15,200 K. [2]

Related Research Articles

62 Andromedae, abbreviated 62 And, is a single star in the northern constellation Andromeda. 62 Andromedae is the Flamsteed designation; it also bears the Bayer designation of c Andromedae. It is bright enough to be seen by the naked eye, with an apparent magnitude of 5.31. Based upon parallax measurements made during the Gaia mission, it is at a distance of roughly 273 light-years from Earth. The star is moving closer to the Earth with a heliocentric radial velocity of −30 km/s, and is predicted to come to within 144.6 light-years in 1,6 million years.

5 Aquarii is a single star in the zodiac constellation of Aquarius, located about 830 light years away from the Sun, based on parallax. 5 Aquarii is the Flamsteed designation. It is visible to the naked eye as a faint, blue-white hued star with an apparent visual magnitude of 5.55. This object is moving closer to the Earth with a heliocentric radial velocity of −3 km/s.

Psi<sup>3</sup> Aurigae Star in the constellation Auriga

Psi3 Aurigae, Latinized from ψ3 Aurigae, is a single, blue-white hued star in the northern constellation of Auriga. It is dimly visible to the naked eye with an apparent visual magnitude of +5.20. Based upon an annual parallax shift of 2.38 ± 0.39 mas as seen from the Earth, it is approximately 1,370 light-years distant from the Sun.

<span class="mw-page-title-main">12 Vulpeculae</span> Star in the constellation Vulpecula

12 Vulpeculae is a star in the northern constellation of Vulpecula, located approximately 630 light years away based on parallax. It has the variable star designation V395 Vul; 12 Vulpeculae is the Flamsteed designation. This object is visible to the naked eye as a faint, blue-white hued star with a baseline apparent visual magnitude of 4.928. It is moving closer to the Earth with a heliocentric radial velocity of -25 km/s.

17 Vulpeculae is a single, blue-white hued star in the northern constellation of Vulpecula. The distance to this star can be estimated from its annual parallax shift of 6.8168±0.1430, which yields a separation of roughly 480 light years. It is moving nearer with a heliocentric radial velocity of −8 km/s, and will make its closest approach in around 6.1 million years at a distance of about 419 ly (128.36 pc). The star is faintly visible to the naked eye with an apparent visual magnitude of 5.08.

HD 167965 is a single star in the northern constellation of Lyra. It is dimly visible to the naked eye on a sufficiently dark night, having an apparent visual magnitude of 5.56. The star is located at a distance of approximately 590 light years from the Sun based on parallax. It is drifting closer with a radial velocity of −20.5 km/s and is predicted to come as near as 72.7 light-years in around 8.5 million years.

<span class="mw-page-title-main">21 Vulpeculae</span> Star in the constellation Vulpecula

21 Vulpeculae is a single, white-hued star in the northern constellation of Vulpecula. Its distance can be estimated from the annual parallax shift of 10.4302±0.0696 mas, yielding a separation of 313 light years. The star is faintly visible to the naked eye at night, having an apparent visual magnitude of 5.19. It is moving further away with a heliocentric radial velocity of about +7 km/s, having come within 243 ly (74.53 pc) around 4.2 million years ago.

33 Vulpeculae is a single star located around 500 light-years away from the Sun in the northern constellation of Vulpecula. It is visible to the naked eye as a dim, orange-hued star with an apparent visual magnitude of 5.31. The object is drifting closer to the Earth with a heliocentric radial velocity of −25 km/s.

25 Vulpeculae is a single star in the northern constellation of Vulpecula, located roughly 1,170 light years away from the Sun. It is visible to the naked eye as a faint, blue-white hued star with an apparent visual magnitude of 5.50 This object is moving closer to the Earth with a heliocentric radial velocity of −11 km/s.

<span class="mw-page-title-main">Mu Ophiuchi</span> Star in the constellation Ophiuchus

μ Ophiuchi, Latinized as Mu Ophiuchi, is a solitary, blue-white hued star in the equatorial constellation of Ophiuchus. It is visible to the naked as a faint point of light with an apparent visual magnitude of 4.62. This object is located approximately 760 light years away from the Sun based on parallax, but is drifting closer with a radial velocity of −18.5 km/s.

<span class="mw-page-title-main">HD 24479</span> Star in the constellation Camelopardalis

HD 24479, also designated as HR 1204, is a solitary, bluish-white hued star located in the northern circumpolar constellation Camelopardalis. The star is visible to the naked eye with an apparent visual magnitude of 5.04. Based on Gaia DR3 parallax measurements, it is located 385 light years from the Sun. However, it is receding with a somewhat constrained heliocentric radial velocity of 4.6 km/s. At its current distance, HD 24479's brightness is diminished by 0.29 magnitudes due to interstellar dust.

<span class="mw-page-title-main">5 Vulpeculae</span> Star in the constellation Vulpecula

5 Vulpeculae is a single, white-hued star in the northern constellation of Vulpecula. It is situated amidst a random concentration of bright stars designated Collinder 399, or Brocchi's Cluster. This is a faint star that is just visible to the naked eye with an apparent visual magnitude of 5.60. Based upon an annual parallax shift of 13.8921±0.0900 mas, it is located around 235 light years from the Sun. It is moving closer with a heliocentric radial velocity of −21 km/s, and will make its closest approach in 2.5 million years at a separation of around 120 ly (36.89 pc).

<span class="mw-page-title-main">14 Vulpeculae</span> Star in the constellation Vulpecula

14 Vulpeculae is a single, yellow-white hued star in the northern constellation of Vulpecula and proximate to the Dumbbell Nebula on the celestial sphere, although actually much closer to the Earth. It is a dim star that is faintly visible to the naked eye with an apparent visual magnitude of 5.68. The distance to 14 Vul, as determined from its annual parallax shift of 18.7753±0.1714, is around 174 light years. It is moving nearer with a heliocentric radial velocity of about −38 km/s, and will make its closest approach in a million years when comes to within about 62 ly (19.04 pc).

20 Vulpeculae is single star located around 1,170 light years away in the northern constellation of Vulpecula. It is visible to the naked eye as a dim, blue-white hued star with an apparent visual magnitude of 5.91. The object is moving closer to the Earth with a heliocentric radial velocity of −22 km/s.

<span class="mw-page-title-main">27 Vulpeculae</span> Star in the constellation Vulpecula

27 Vulpeculae is a single, blue-white star in the northern constellation of Vulpecula. It is a dim star, visible to the naked eye, with an apparent visual magnitude of 5.59. An annual parallax shift of 10.6692±0.0483 mas provides a distance estimate of about 306 light-years. It is moving closer with a heliocentric radial velocity of −22 km/s, and will make perihelion passage at a distance of around 119 ly (36.56 pc) in 3.75 million years.

<span class="mw-page-title-main">3 Monocerotis</span> Star in Monoceros constellation

3 Monocerotis is a binary star system in the equatorial constellation of Monoceros, located approximately 780 light years away from the Sun based on parallax. It is visible to the naked eye as a faint, blue-white hued star with a combined apparent visual magnitude of 4.92. The system is moving further from the Earth with a heliocentric radial velocity of +39 km/s.

<span class="mw-page-title-main">4 Persei</span> Star in the constellation Perseus

4 Persei is a single star in the northern constellation of Perseus, located around 670 light years away from the Sun. It is visible to the naked eye as a faint, blue-white hued star with an apparent visual magnitude of 5.04 The Bayer designation for this star is g Persei; 4 Persei is the Flamsteed designation. This object has a peculiar velocity of 26.3 km/s and may be a runaway star.

<span class="mw-page-title-main">29 Persei</span> Star in the constellation Perseus

29 Persei is a single star in the northern constellation of Perseus, located approximately 640 light years away from the Sun based on parallax. It is visible to the naked eye as faint, blue-white hued star with an apparent visual magnitude of 5.16. This object is a member of the Alpha Persei Cluster.

Nu Leporis, Latinized from ν Leporis, is a probable astrometric binary star system in the constellation Lepus. It is visible to the naked eye as a faint star with an apparent visual magnitude of 5.29. Based upon an annual parallax shift of 7.70 mas as seen from the Earth, it is 420 light years from the Sun.

<span class="mw-page-title-main">HD 10390</span> B-type main-sequence star; Triangulum

HD 10390 is a solitary star located in the northern constellation Triangulum. It is faintly visible to the naked eye as a bluish-white hued point of light with an apparent magnitude of 5.64. The object is located relatively close at a distance of 292 light-years based on Gaia DR3 parallax measurements and it is drifting closer with a heliocentric radial velocity of −1.9 km/s. At its current distance, HD 10390's brightness is diminished by an interstellar extinction of only five-hundredths of a magnitude and it has an absolute magnitude of +1.00.

References

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