18421+3445 STF 2372 AB (HD 173087)

 
 
18h 42m 08.09s +34° 44' 46.7" P.A. 82.00 sep 25.0 mag 6.45,7.73 Sp B5V dist. 456.62 pc (1489.49 l.y.)
 
 
Coord 2000 18421+3445 Discov num STF2372 Comp AB Coord arcsec 2000 18 42 08.09 +34 44 46.7
Date first 1782 Date last 2019 Obs 79
Pa first 85 Pa last 82.3 P.A. Now (θ) 82.3°
Sep first 22.9 Sep last 25.009 Sep. Now (ρ) 25.009"
Mag pri 6.45 Mag sec 7.73 delta mag (ΔM) 1.28 Spectral class B5V (blue-white)
Pri motion ra +000 Sec motion ra +001
Pri motion dec -004 Sec motion dec -003
Notes N Y (See Notes, Parallax indicates components are non-physical)
rPM=0.354
This double is not physical.
 
 
18421+3445 SYSTEM COMPONENTS
 
 
Show name SAO coord wds_name last obs pa sep mag1 mag2 d_mag orb current
Show 67265 18 42 08 +34 44 47 B 2546 Aa,Ab 2016 45 24 0.1 6.50 7.50 1.00 Y
Show HD 173087 67265 18 42 08 +34 44 47 STF 2372 AB 2019 79 82 25.0 6.45 7.73 1.28 <===
Show 67265 18 42 08 +34 44 47 BLL 34 AC 2013 9 69 114.0 6.45 11.79 5.34
Show 18 42 10 +34 44 50 BLL 34 BC 2015 16 65 91.1 7.73 11.79 4.06
Quadruple system
3 estimated visually detectable stars in this system
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Name HD 173087 Constellation Lyra SAO 67265 HIP 91707
Tycho2 2645-02013-1 Gaia DR2 2091774627937648256 HD 173087 HR 7033
GC 25597 ADS 11593 BD BD+34 3285 Distance 456.62
Distance ly 1489.49
 
 
WDS 18421+3445 STF 2372 AB (HD 173087) : NOTES
 
 
discov_num notes refcode
B 2546 A is called a spectroscopic binary, but the variation is likely caused
by motion in the close visual pair.
B is BD+34@3286.
STF2372 AB: H 4 94. MEv2010
STF2372 AB: SEI 571. Nsn2017b
 
 
REFERENCES
 
 
refcode metd author reference
MEv2010 - MacEvoy, B. ...................
MEv2010 private communication, 2010 (see http://www.handprint.com/ASTRO/index.html)
Nsn2017b not - Nanson, J. ...................
Nsn2017b private communication, 2017
 
 
DISCOVERER
 
 
idgroup discov author
1 B van den Bos, W.H.
212 BLL Ball, R.S.
219 STF Struve, F.G.W.
 
 
WDS HISTORIC DATA
 
 
coord_2000 discov_num comp epoch obs pa sep mag_pri mag_sec spectr notes coord_arcsec_2000
18421+3445 STF2372 AB 2007 60 82 24.8 6.45 7.73 YD 184208.09+344446.7
18421+3445 STF2372 AB 2008 61 82 24.9 6.45 7.73 YD 184208.09+344446.7
18421+3445 STF2372 AB 2010 63 82 25.2 6.45 7.73 NYD 184208.09+344446.7
18421+3445 STF2372 AB 2012 66 82 24.9 6.45 7.73 NYD 184208.09+344446.7
18421+3445 STF2372 AB 2013 69 82 24.9 6.45 7.73 B5V NY 184208.09+344446.7
18421+3445 STF2372 AB 2014 71 82 24.9 6.45 7.73 B5V NY 184208.09+344446.7
18421+3445 STF2372 AB 2015 72 82 25.1 6.45 7.73 B5V NY 184208.09+344446.7
18421+3445 STF2372 AB 2016 74 82 25.2 6.45 7.73 B5V NY 184208.09+344446.7
18421+3445 STF2372 AB 2017 75 83 25.0 6.45 7.73 B5V NY 184208.09+344446.7
18421+3445 STF2372 AB 2018 77 83 25.0 6.45 7.73 B5V NY 184208.09+344446.7
18421+3445 STF2372 AB 2019 78 82 25.0 6.45 7.73 B5V NY 184208.09+344446.7

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WDS 18421+3445 STF 2372 AB (HD 173087) : VISUAL OBSERVATIONS REPORTS
 
 
No records found.


 
 
WDS 18421+3445 STF 2372 AB (HD 173087) : MEASURES
 
 
No records found.

 
 
WDS 18421+3445 (HD 173087) : VIRTUAL EYEPIECE
 
 

virtual eyepiece
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Radius:
Components only
 
 
WDS 18421+3445 (HD 173087) : ALADIN DSS IMAGE @
 
 
Error -22130
Not valid ID.
Error -22130
Not valid ID.
Error -27220
Not valid ID.