DU Lyncis

DU Lyncis
Observation data
Epoch J2000      Equinox J2000
Constellation Lynx
Right ascension 07h 46m 39.28149s[1]
Declination +37° 31′ 02.6318″[1]
Apparent magnitude (V) 5.15[2]
Characteristics
Spectral type M3 III[3]
B−V color index 1.588±0.010[2]
Variable type SRb[4]
Astrometry
Radial velocity (Rv)−37.20±0.21[5] km/s
Proper motion (μ) RA: +27.245[1] mas/yr
Dec.: +12.499[1] mas/yr
Parallax (π)9.2149 ± 0.2986 mas[1]
Distance350 ± 10 ly
(109 ± 4 pc)
Absolute magnitude (MV)−0.46[2]
Details
Luminosity536[6] L☉
Temperature3,779[6] K
Other designations
DU Lyn, NSV 3721, BD+37 1769, FK5 1199, HD 62647, HIP 37946, HR 2999, SAO 60328[7]
Database references
SIMBADdata

DU Lyncis is a single[8] variable star in the constellation Lynx. It is a faint star but visible to the naked eye with an apparent visual magnitude of 5.15.[2] With an annual parallax shift of 9.2 mas,[1] it is located some 350 light years from the Sun. The star is moving closer with a heliocentric radial velocity of −37 km/s.[5]

This is an aging red giant star with a stellar classification of M3 III, indicating that it has consumed the hydrogen at its core and evolved away from the main sequence. Eggen lists it as being on the asymptotic giant branch.[9] It has been classified as a semiregular variable of type SRb,[4] ranging from magnitude 5.18 down to 5.31[10] with periods of 360 and possibly 22 days.[3] It shines with a luminosity approximately 536 times that of the Sun and has an effective temperature of 3,779 K.[6]

  1. ^ a b c d e f Cite error: The named reference GaiaDR2 was invoked but never defined (see the help page).
  2. ^ a b c d Cite error: The named reference Anderson2012 was invoked but never defined (see the help page).
  3. ^ a b Cite error: The named reference glass2007 was invoked but never defined (see the help page).
  4. ^ a b Cite error: The named reference gcvs was invoked but never defined (see the help page).
  5. ^ a b Cite error: The named reference deBruijne2012 was invoked but never defined (see the help page).
  6. ^ a b c Cite error: The named reference Mcdonald2012 was invoked but never defined (see the help page).
  7. ^ Cite error: The named reference SIMBAD was invoked but never defined (see the help page).
  8. ^ Cite error: The named reference Eggleton2008 was invoked but never defined (see the help page).
  9. ^ Cite error: The named reference eggen1992 was invoked but never defined (see the help page).
  10. ^ Cite error: The named reference AAVSODU was invoked but never defined (see the help page).