Ross 614

Ross 614
Observation data
Epoch J2000      Equinox J2000
Constellation Monoceros
CCDM J06294-0249 A[1]
Right ascension 06h 29m 23.401s[1]
Declination −02° 48′ 50.32″[1]
Apparent magnitude (V) 11.15[1]
CCDM J06294-0249 B[2]
Right ascension 06h 29m 23.52s[2]
Declination −02° 48′ 51.1″[2]
Apparent magnitude (V) 14.23[2]
Characteristics
Spectral type M4.5V[1]/M8V[2]
Apparent magnitude (B) ~12.77[1]/~15.96[3]
Apparent magnitude (V) ~11.08[1]/~14.23[2]
Apparent magnitude (R) ~9.78[1]
Apparent magnitude (I) ~8.06[1]
Apparent magnitude (J) ~6.376[1]/~8.17[3]
Apparent magnitude (H) ~5.754[1]/~7.38[3]
Apparent magnitude (K) ~5.486[1]/~6.99[3]
U−B color index 1.19/—
B−V color index 1.72/—
Variable type UV Ceti[4]Flare star[1]/
Astrometry
Radial velocity (Rv)+18.2 km/s
Proper motion (μ) RA: 694.73 mas/yr
Dec.: -618.62 mas/yr
Parallax (π)244.07 ± 0.73[3] mas
Distance13.36 ± 0.04 ly
(4.10 ± 0.01 pc)
Absolute magnitude (MV)13.09/16.17
Orbit
Period (P)16.595 ±0.0077[3] yr
Semi-major axis (a)1.1012 ±.0082[3]"
Details
Mass0.2228 ±0.0055[3]/
0.1107 ±0.0028[3] M☉
Other designations
A: CCDM J06294-0249A, GCTP 1509.00, GJ 234 A, G 106-049, HIP 30920, LFT 473, LHS 1849/1850, LPM 239, LTT 2564, NLTT 16580, V577 Monocerotis
B: CCDM J06294-0249B, GJ 234 B, LHS 1850
Database references
SIMBADdata

Ross 614 (V577 Monocerotis) is a red dwarf UV Ceti[4]flare star and it is the primary member of a nearby binary star system in the constellation of Monoceros. This star has a magnitude of about 11, making it invisible to the unaided eye even though it is one of the stars nearest to the Sun.[1] This system is among the closest to our Sun at an estimated distance of about 13.3 light years. Because this star is so close to the Earth it is often the subject of study, hence the large number of designations by which it is known.

Binary star system

This binary star system consists of two closely spaced low-mass red dwarfs. The secondary star is a dim magnitude 14 lost in the glare of the nearby primary star.[2]
The most recent determination of the system orbital elements comes from a study by George Gatewood using older sources along with data from the Hipparcos satellite. This study yielded an orbital period of about 16.6 years and a semi-major axis separation of about 1.1 arc seconds (2.4—5.3 AU).[3]

History

The primary star was discovered in 1927 by F. E. Ross using the 40 in (100 cm) refractor telescope at the Yerkes Observatory. He noticed the high proper motion of this dim 11th magnitude star in his second-epoch plates that were part of an astronomical survey started by E. E. Barnard, his predecessor at the observatory. Ross then included this new star in his eponymous catalog along with many others he discovered.
The first detection of a binary system was in 1936 by Dirk Reuyl using the 26-in refractor telescope of the McCormick Observatory at the University of Virginia using astrometric analysis of photographic plates.[5] In 1951 Sarah L. Lippincott made the first reasonably accurate predictions of the position of the secondary star using the 24 in (61 cm) refractor telescope of the Sproul Observatory.[6] These calculations were used by Walter Baade to find and optically resolve this binary system for the first time using the then new 5 m (200 in) Hale Telescope at the Palomar Observatory in California.[3]

Distance

Ross 614 distance estimates

Source Parallax, mas Distance, pc Distance, ly Distance, Pm Ref.
Woolley et al. (1970) 252±4 3.97±0.06 12.94+0.21
−0.2		 122.4+2
−1.9		 [7]
Gliese & Jahreiß (1991) 242.1±1.7 4.131±0.029 13.47+0.1
−0.09		 127.5±0.9 [8]
van Altena et al. (1995) 244.2±3.7 4.1±0.06 13.36+0.21
−0.2		 126.4±1.9 [9]
Perryman et al. (1997) (Hipparcos) 242.89±2.64 4.12+0.05
−0.04		 13.43+0.15
−0.14		 127±1.4 [10]
Perryman et al. (1997) (Tycho) (absents) [11]
Söderhjelm (1999) 244.4±2.4 4.09±0.04 13.35±0.13 126.3+1.3
−1.2		 [12]
Gatewood et al. (2003) (Weighted mean) 244.07±0.73 4.097±0.012 13.36±0.04 126.4±0.4 [3]
van Leeuwen (2007) 242.32±3.12 4.13±0.05 13.46+0.18
−0.17		 127.3+1.7
−1.6		 [13]
RECONS TOP100 (2009) 244.34±2.01[note 1] 4.09±0.03 13.35±0.11 126.3±1 [14]
RECONS TOP100 (2012) 244.44±0.92[note 2] 4.091±0.015 13.34±0.05 126.2±0.5 [15]

Non-trigonometric distance estimates are marked in italic. The most precise estimate is marked in bold.

See also

References

  1. ↑ 1.0 1.1 1.2 1.3 1.4 1.5 1.6 1.7 1.8 1.9 1.10 1.11 1.12 1.13 "SIMBAD query result: V* V577 Mon -- Flare Star". Centre de Données astronomiques de Strasbourg. Retrieved 2009-06-02.
  2. ↑ 2.0 2.1 2.2 2.3 2.4 2.5 2.6 "SIMBAD query result: LHS 1850 -- High proper-motion Star". Centre de Données astronomiques de Strasbourg. Retrieved 2009-06-02.
  3. ↑ 3.0 3.1 3.2 3.3 3.4 3.5 3.6 3.7 3.8 3.9 3.10 3.11 George Gatewood et al. (2003). "An Astrometric Study of the Low-Mass Binary Star Ross 614" (PDF). The Astronomical Journal 125 (3): 1530–1536. Bibcode:2003AJ....125.1530G. doi:10.1086/346143.
  4. ↑ 4.0 4.1 "GCVS Query=V577 Mon". General Catalog of Variable Stars. Centre de Données astronomiques de Strasbourg. Retrieved 2009-06-02.
  5. ↑ Reuyl, Dirk (July 1936). "Variable proper motion of Ross 614". The Astronomical Journal 45 (1050): 133–135. Bibcode:1936AJ.....45..133R. doi:10.1086/105356.
  6. ↑ Lippincott, S. L. (February 1951). "Parallax and orbit analysis of Ross 614". Astronomical Journal 55: 236–242. Bibcode:1951AJ.....55..236L. doi:10.1086/106471.
  7. ↑ Woolley R.; Epps E. A.; Penston M. J.; Pocock S. B. (1970). "Woolley 234". Catalogue of stars within 25 parsecs of the Sun. Retrieved 2014-10-21.
  8. ↑ Gliese, W. and Jahreiß, H. (1991). "Gl 234". Preliminary Version of the Third Catalogue of Nearby Stars. Retrieved 2014-10-21.
  9. ↑ Van Altena W. F., Lee J. T., Hoffleit E. D. (1995). "GCTP 1509". The General Catalogue of Trigonometric Stellar Parallaxes (Fourth ed.). Retrieved 2014-10-21.
  10. ↑ Perryman et al. (1997). "HIP 30920". The Hipparcos and Tycho Catalogues. Retrieved 2014-10-21.
  11. ↑ Perryman et al. (1997). "HIP 30920". The Hipparcos and Tycho Catalogues. Retrieved 2014-10-21.
  12. ↑ Söderhjelm, Staffan (1999). "HIP 30920". Visual binary orbits and masses post Hipparcos. Retrieved 2014-10-21.
  13. ↑ van Leeuwen F. (2007). "HIP 30920". Validation of the new Hipparcos reduction. Retrieved 2014-10-21.
  14. ↑
  15. ↑ "RECONS TOP100". THE ONE HUNDRED NEAREST STAR SYSTEMS brought to you by RECONS (Research Consortium On Nearby Stars). 2012. Retrieved 2014-10-21.

Notes

  1. ↑ Weighted parallax based on parallaxes from van Altena et al. (1995) and Söderhjelm (1999).
  2. ↑ Weighted parallax based on parallaxes from van Altena et al. (1995), Söderhjelm (1999) and Gatewood et al. (2003) (not weighted mean).