Observation data Epoch J2000 Equinox J2000 | |
---|---|
Constellation | Puppis |
Right ascension | 07h 38m 18.04541s [1] |
Declination | −25° 21′ 53.3017″ [1] |
Apparent magnitude (V) | 4.69 [2] |
Characteristics | |
Spectral type | B8III [3] |
U−B color index | −0.35 [4] |
B−V color index | −0.11 [4] |
Variable type | β Lyr [5] |
Astrometry | |
Radial velocity (Rv) | +41.00 [6] km/s |
Proper motion (μ) | RA: −3.03 [1] mas/yr Dec.: −7.42 [1] mas/yr |
Parallax (π) | 5.27 ± 0.26 mas [1] |
Distance | 620 ± 30 ly (190 ± 9 pc) |
Absolute magnitude (MV) | −1.80 ± 0.25 (−1.77 + 5.85) [7] |
Absolute bolometric magnitude (Mbol) | −2.35 + 5.54 [7] |
Orbit [7] | |
Period (P) | 2.58237 ± 0.00005 d |
Semi-major axis (a) | 13.30 ± 0.40 R☉ |
Inclination (i) | 56.2° |
Details [7] | |
PU Pup A | |
Mass | 4.10 ± 0.20 M☉ |
Radius | 6.60 ± 0.30 R☉ |
Luminosity | 695 ± 80 L☉ |
Surface gravity (log g) | 3.40 ± 0.05 cgs |
Temperature | 11500 ± 500 K |
Rotational velocity (v sin i) | 123 [8] km/s |
PU Pup B | |
Mass | 0.65 ± 0.05 M☉ |
Radius | 0.90 ± 0.10 R☉ |
Luminosity | 0.50 ± 0.10 L☉ |
Surface gravity (log g) | 4.30 ± 0.10 cgs |
Temperature | 5000 ± 350 K |
Other designations | |
Database references | |
SIMBAD | data |
PU Puppis (PU Pup) is a class B8III [3] (blue giant) star in the constellation Puppis. Its apparent magnitude is 4.69 [2] and it is approximately 620 light years away based on parallax. [1]
It is a β Lyrae variable, ranging from 4.75 to 4.69 magnitude with a period of 2.58 days. [5] The secondary is estimated at 5.6 magnitude, although recent observations have failed to confirm it. [10] [11] The primary has a mass of 4.10 solar masses, and is radiating at an effective temperature of 11,500 K. The secondary, with a mass 65% that of the Sun, has a surface temperature of about 5,000 K. [7]
Tau Pegasi, formally named Salm, is a magnitude 4.6 star 162 light years away in the constellation of Pegasus. With about twice the mass of the Sun and thirty times as luminous, tt is a δ Scuti variable star with its brightness changing by a few hundredths of a magnitude over about an hour.
15 Vulpeculae is a variable star in the northern constellation of Vulpecula, located approximately 243 light years away based on parallax. It has the variable star designation NT Vulpeculae; 15 Vulpeculae is the Flamsteed designation. It is visible to the naked eye as a faint, white-hued star with a typical apparent visual magnitude of 4.66. This object is moving closer to the Earth with a heliocentric radial velocity of −26 km/s.
9 Vulpeculae is a star in the northern constellation of Vulpecula, located about 560 light years away based on parallax. It is visible to the naked eye as a faint, blue-white hued star with a baseline apparent visual magnitude of 5.01. The star is moving further from the Earth with a heliocentric radial velocity of +5 km/s.
HD 192685, also known as QR Vulpeculae or HR 7739, is a Be star about 1,000 ly away in the Vulpecula constellation. It is visible to the naked eye.
28 Monocerotis is a single star in the equatorial constellation of Monoceros. It has an orange-hue and is faintly visible to the naked eye with an apparent visual magnitude of 4.69. The distance to this star is approximately 450 light years based on parallax, and it has an absolute magnitude of −1.00. The star is drifting further away from the Sun with a radial velocity of +26.7 km/s.
11 Orionis is a solitary Ap star in the equatorial constellation of Orion, near the border with Taurus. It is visible to the naked eye with an apparent visual magnitude of 4.65, and it is located approximately 365 light years away from the Sun based on parallax. The star is moving further from the Sun with a heliocentric radial velocity of +16.8 km/s.
31 Orionis is a binary star system in the equatorial constellation of Orion, located near the bright star Mintaka. It is visible to the naked eye as a faint, orange-hued point of light with a baseline apparent visual magnitude of 4.71. The distance to this system is approximately 490 light years away based on parallax, and it is drifting further away with a mean radial velocity of +6 km/s.
λ Pavonis, Latinized as Lambda Pavonis, is a single, variable star in the southern constellation of Pavo. It is a blue-white hued star that is faintly visible to the naked eye with an apparent visual magnitude that fluctuates around 4.22. This object is located approximately 1,400 light years from the Sun, based upon parallax. It is a member of the Scorpius–Centaurus association.
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.
11 Puppis is a single star in the southern constellation of Puppis, located approximately 522 light years away based on parallax. It has the Bayer designation j Puppis; 11 Puppis is the Flamsteed designation. This object is visible to the naked eye as a faint, yellow-white star with an apparent visual magnitude of 4.20. It is moving further from the Earth with a heliocentric radial velocity of +13.3 km/s.
V Puppis is a star system in the constellation Puppis. Its apparent magnitude is 4.41. There is a binary star system at the center with a B1 dwarf orbiting a B3 subgiant star. They have an orbital period of 1.45 days and a distance of only 15 solar radii apart. However, the system moves back and forth, indicating that there is a massive object orbiting them with a period around 5.47 years. Based on the mass of the object, its lack of a visible spectrum, and circumstellar matter in the system with many heavy elements, it is probably a black hole. However, a follow-up study could not confirm this object, but found signs that there may be a third object which is fainter than the other components.
QZ Puppis is a class B2.5V star in the constellation Puppis. Its apparent magnitude is 4.5 and it is approximately 650 light years away based on parallax.
NV Puppis, also known as υ1 Puppis, is a class B2V star in the constellation Puppis. Its apparent magnitude is 4.67 and it is approximately 800 light years away based on parallax.
MX Puppis is a class B1.5IV star in the constellation Puppis. Its apparent magnitude varies irregularly between magnitude 4.6 and 4.9 and it is classified as a Gamma Cassiopeiae variable. It is approximately 930 light years away based on parallax.
OU Puppis is a chemically peculiar class A0 star in the constellation Puppis. Its apparent magnitude is about 4.9 and it is approximately 188 light-years away based on parallax.
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.
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.
21 Persei is a single, variable star in the northern constellation of Perseus, located about 331 light years away from the Sun. It is visible to the naked eye as a faint, white-hued star with an apparent visual magnitude of 5.10 km/s. The object is moving further from the Earth with a heliocentric radial velocity of +8.5 km/s. It has the variable star designation LT Persei; 21 Persei is the Flamsteed designation.
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.
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 about 5. 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.