HR 2554
| Observation data Epoch J2000.0 Equinox J2000.0 (ICRS) | |
|---|---|
| Constellation | Carina |
| Right ascension | 06h 49m 51.3139s[1] |
| Declination | −53° 37′ 20.818″[1] |
| Apparent magnitude (V) | +4.418[1] |
| Characteristics | |
| Spectral type | G6II/A0V[2] |
| U−B color index | +0.61[2] |
| B−V color index | +0.92[2] |
| R−I color index | +0.45[2] |
| Variable type | EA/GS[3] |
| Astrometry | |
| Radial velocity (Rv) | 26.0 ± 0.9[1] km/s |
| Proper motion (μ) | RA: −2.27[1] mas/yr Dec.: 17.57[1] mas/yr |
| Parallax (π) | 5.90 ± 0.51[1] mas |
| Distance | 550 ± 50 ly (170 ± 10 pc) |
| Other designations | |
| Database references | |
| SIMBAD | data |
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 magnitudes and is approximately 4.39 at maximum brightness.[1][3] Its primary is a G-type bright giant star and its secondary is an A-type main sequence star.[2] It is approximately 553 light years from Earth.
HR 2554 A
The primary component, HR 2554 A, is a yellow G-type bright giant with a mean apparent magnitude of +4.41.
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. The two components regularly eclipse each other, making A Carinae a variable star. Its brightness varies by 0.06 magnitudes with a period equal to its orbital period of 195 days.
References
- ↑ 1.0 1.1 1.2 1.3 1.4 1.5 1.6 1.7 1.8 V* V415 Car -- Eclipsing binary of Algol type, database entry, SIMBAD. Accessed on line August 23, 2008.
- ↑ 2.0 2.1 2.2 2.3 2.4 HR 2554, database entry, The Bright Star Catalogue, 5th Revised Ed. (Preliminary Version), D. Hoffleit and W. H. Warren, Jr., CDS ID V/50. Accessed on line August 23, 2008.
- ↑ 3.0 3.1 V415 Car, database entry, The combined table of GCVS Vols I-III and NL 67-78 with improved coordinates, General Catalogue of Variable Stars, Sternberg Astronomical Institute, Moscow, Russia. Accessed on line August 23, 2008.
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