HR 2554

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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]
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]
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
A Carinae, V415 Car, CCDM J06499-5337, CD−53 1613, CPD−53 1168, GC 8972, GSC 08536-00794, HD 50337, HIP 32761, HR 2554, PPM 335506, SAO 234737, TYC 8536-794-1.[1]
Database references

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[edit]

The primary component, HR 2554 A, is a yellow G-type bright giant with a mean apparent magnitude of +4.41.

HR 2554 B[edit]

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[edit]

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.


  1. ^ a b c d e f g h i V* V415 Car -- Eclipsing binary of Algol type, database entry, SIMBAD. Accessed on line August 23, 2008.
  2. ^ a b c d e 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. ^ a b 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.