18213-0254 STFB 8 (Eta Ser)

18h 21m 18.60s -02° 53' 55.8" P.A. 54.00 sep 251.4 mag 3.34,10.87 Sp K2IIIab dist. 18.54 pc (60.48 l.y.)

Coord 2000 18213-0254 Discov num STFB  8 Comp Coord arcsec 2000 18 21 18.60 -02 53 55.8
Date first 1835 Date last 2010 Obs 25
Pa first 77 Pa last 54.2 P.A. Now (θ) 54.2°
Sep first 110.9 Sep last 251.38 Sep. Now (ρ) 251.38"
Mag pri 3.34 Mag sec 10.87 delta mag (ΔM) 7.53 Spectral class K2IIIab (yellow-orange)
Pri motion ra -548 Sec motion ra +000
Pri motion dec -701 Sec motion dec -007
Notes N L U (See Notes, Linear solution, Proper motion indicates non-physical)




rPM=0.994

This double is not physical.



OTHER CATALOGS AND DESIGNATIONS

Name Eta Ser Var name NSV10675 Ser Constellation Serpens SAO 142241
HIP 89962 Tycho2 5102-00416-1 HD 168723 HR 6869
GC 25046 GL Gl 711 BD BD-02 4599 Bayer Eta Serpentis
Bayer name Eta Ser Flamsteed 58 Serpentis Flamsteed name 58 Ser FK5 688
Distance 18.54 Distance ly 60.48 Bayer greek η Ser