G 208-44/208-45

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G 208-44/208-45
Observation data
Epoch J2000      Equinox J2000
Constellation Cygnus
Right ascension 19h 53m 54.492s
Declination +44° 24′ 53.41″
Apparent magnitude (V) 13.41 / 14.01 / 16.75
Characteristics
Spectral type M5.5 / M6 / M5.5
Variable type Suspected
Astrometry
Proper motion (μ) RA: 397 mas/yr
Dec.: -482 mas/yr
Parallax (π) 220.2 ± 1.0[1] mas
Distance 14.81 ± 0.07 ly
(4.54 ± 0.02 pc)
Absolute magnitude (MV) 15.31 / 15.72 / 18.46
Details
Luminosity 0.000084 / 0.000048 L
Orbit
Companion G 208-44/208-45 B
Semi-major axis (a) 33 AU"
Other designations
GJ 1245, V1581 Cyg, NLTT 48414, LHS 3494.
Database references
SIMBAD data

G 208-44/208-45 (V1581 Cygni, GJ 1245) is a triple star system, 14 light-years away, relatively close to the Solar System. The star system contains G 208-44 A, G 208-44 B, and G 208-45. All of the stars are rather dim. It is the 42nd closest stellar system to the Solar System, located in the constellation Cygnus.[2]

Distance[edit]

G 208-44/208-45 distance estimates

Source Parallax, mas Distance, pc Distance, ly Ref.
Gliese & Jahreiß (1991) 212.0 ± 4.3 4.72+0.1
−0.09
15.38+0.32
−0.31
[3]
van Altena et al. (1995) 220.2 ± 1.0 4.541 ± 0.021 14.81 ± 0.07 [1]
? 215 ± 3.0[note 1] 4.65+0.07
−0.06
15.17 ± 0.21
RECONS TOP100 (2012) 220.2 ± 1.0[note 2] 4.541 ± 0.021 14.81 ± 0.07 [4]

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

References[edit]

  1. ^ a b Van Altena W. F., Lee J. T., Hoffleit E. D. (1995). "GCTP 4706.01". The General Catalogue of Trigonometric Stellar Parallaxes, Fourth Edition. Retrieved 2014-10-22. 
  2. ^ "The One Hundred Nearest Star Systems". RECONS. Retrieved 2010-04-13. 
  3. ^ Gliese, W. and Jahreiß, H. (1991). "GJ 1245". Preliminary Version of the Third Catalogue of Nearby Stars. Retrieved 2014-10-22. 
  4. ^ "RECONS TOP100". THE ONE HUNDRED NEAREST STAR SYSTEMS brought to you by RECONS (Research Consortium On Nearby Stars). 2012. Retrieved 2014-10-22. 

Notes[edit]

  1. ^ Parallax from earlier version of this article.
  2. ^ Parallax from van Altena et al. (1995).

External links[edit]