HD 53367 explained

HD 53367 is a triple star system in the constellation of Monoceros. The primary star was identified as a variable Herbig Ae/Be star in 1989.^[1] Its companion, spectroscopically discovered in 2006, is a pre-main-sequence star star with an average separation of 1.7 AU.^[2] The star system is embedded in the extended nebula IC 2177.

The binary HD 53367A is part of the hierarchical triple star system RST 3489, with an additional Herbig Ae/Be star HD 53367B of spectral class B1Ve at a projected separation of 0.6″. All stars in the system belong to the star-forming CMa OB1 association.^[1] The Hipparcos,^[3] Gaia Data Release 2, and Gaia Data Release 3 parallax values for HD 53367A are highly discrepant, but the system is thought to be about 1,000 parsecs away.

Extended nebula

HD 53367A is a very young and gas-rich system, with most of the gas still obscuring the secondary component HD 53367Ab.^[2]

Notes and References

1. 1989PASP..101.1004H . Photometry of Three Herbig be Stars: HD 53367, HD 200775, and HD 259431 . Halbedel . Elaine M. . Publications of the Astronomical Society of the Pacific . 1989 . 101 . 1004 . 10.1086/132567 . 119992761 . free .
2. 2006A&A...452..551P . The Herbig B0e star HD 53367: Circumstellar activity and evidence of binarity . Pogodin . M. A. . Malanushenko . V. P. . Kozlova . O. V. . Tarasova . T. N. . Franco . G. A. P. . Astronomy and Astrophysics . 2006 . 452 . 2 . 551 . 10.1051/0004-6361:20053704 . free .
3. 0708.1752 . 2007A&A...474..653V . 10.1051/0004-6361:20078357 . Validation of the new Hipparcos reduction . Astronomy and Astrophysics . 474 . 2 . 653–664 . 2007 . Van Leeuwen . F. . 18759600 .