HR 2554
Star in the constellation Carina From Wikipedia, the free encyclopedia
HR 2554, also known as V415 Carinae and A Carinae, is an eclipsing spectroscopic binary of the Algol type in the constellation of Carina whose apparent visual magnitude varies by 0.06 magnitude and is approximately 4.39 at maximum brightness. It is easily visible to the naked eye of a person far from brightly-lit urban ares. Its primary is a G-type bright giant star and its secondary is an A-type main-sequence star. It is approximately 553 light-years from Earth.
| Observation data Epoch J2000.0 Equinox J2000.0 (ICRS) | |
|---|---|
| Constellation | Carina |
| Right ascension | 06h 49m 51.31414s[1] |
| Declination | −53° 37′ 20.8182″[1] |
| Apparent magnitude (V) | +4.40[2] ([3]) |
| Characteristics | |
| Spectral type | G6II + A1V[4] |
| U−B color index | +0.61[2] |
| B−V color index | +0.92[2] |
| R−I color index | +0.45[2] |
| Variable type | EA[3] |
| Astrometry | |
| Radial velocity (Rv) | 26.0 ± 0.9[5] km/s |
| Proper motion (μ) | RA: −1.99[1] mas/yr Dec.: 17.58[1] mas/yr |
| Parallax (π) | 5.99 ± 0.18 mas[1] |
| Distance | 182[4] pc |
| Absolute magnitude (MV) | –1.58[6] |
| Orbit[7] | |
| Period (P) | 195.245 days |
| Eccentricity (e) | 0.00585 |
| Inclination (i) | 82.7° |
| Semi-amplitude (K1) (primary) | 24.2535 km/s |
| Semi-amplitude (K2) (secondary) | 38.6[4] km/s |
| Details[4] | |
| A | |
| Mass | 3.14 M☉ |
| Radius | 31.3 R☉ |
| Luminosity | 537 L☉ |
| Surface gravity (log g) | 1.94 cgs |
| Temperature | 4,981 K |
| B | |
| Mass | 1.98 M☉ |
| Radius | 1.9 R☉ |
| Luminosity | 25 L☉ |
| Surface gravity (log g) | 4,18 cgs |
| Temperature | 9,388 K |
| Metallicity | −0.04 |
| Other designations | |
| Database references | |
| SIMBAD | data |
HR 2554 A
The primary component, HR 2554 A, is a yellow G-type bright giant with a mean apparent magnitude of +4.4.
HR 2554 B
The secondary component, HR 2554 B, is a white A-type main-sequence dwarf, about three magnitudes fainter than the primary.
HR 2554 binary system
HR 2554 has two components in orbit around each other, making it a binary star. The semi-major axis of the secondary's orbit is 2.17 arcseconds. Thomas B. Ake and Sidney B. Parsons discovered that HR 2554 is a variable star, in 1986.[9] It was given its variable star designation, V415 Carinae, in 1989.[10] The two components regularly eclipse each other. The system's brightness varies by 0.06 magnitude with a period equal to its orbital period of 195 days.[3]
References
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