18512+5923 STF 2420 BC

 
 
18h 51m 08.98s +59° 23' 45.8" P.A. 326.00 sep 103.5 mag 8.26,12.67 Sp K3IIIp
 
 
Coord 2000 18512+5923 Discov num STF2420 Comp BC Coord arcsec 2000 18 51 08.98 +59 23 45.8
Date first 1880 Date last 2015 Obs 9
Pa first 327 Pa last 326.2 P.A. Now (θ) 326.2°
Sep first 107.8 Sep last 103.462 Sep. Now (ρ) 103.462"
Mag pri 8.26 Mag sec 12.67 delta mag (ΔM) 4.41 Spectral class K3IIIp (yellow-orange)
Pri motion ra Sec motion ra -000
Pri motion dec Sec motion dec -003
Notes N (See Notes)
Nature of this double is uncertain.
 
 
18512+5923 SYSTEM COMPONENTS
 
 
Show name SAO coord wds_name last obs pa sep mag1 mag2 d_mag orb current
Show 31218 18 51 12 +59 23 18 CIA 8 Aa,Ab 2014 6 202 0.0 4.77 11.00 6.23 Y
Show Omi Dra 31218 18 51 12 +59 23 18 STF 2420 AB 2019 94 316 37.6 4.77 8.26 3.49
Show 31218 18 51 12 +59 23 18 STF 2420 AC 2014 4 324 141.3 4.77 12.67 7.90
Show 18 51 09 +59 23 46 STF 2420 BC 2015 9 326 103.5 8.26 12.67 4.41 <===
Quadruple system
3 estimated visually detectable stars in this system
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Constellation Draco Gaia DR2 2156134949085645184
 
 
WDS 18512+5923 STF 2420 BC : NOTES
 
 
discov_num notes refcode
STF2420 omi Dra = 47 Dra. A is a spectroscopic binary and also variable.
AB: Optical pair, based on study of relative motion of the components
using the method of apparent motion parameters. Kiy2008
AB: H 4 20. MEv2010
omi Dra Hipparcos astrometric solution adopted some elements from the orbit of HIP1997d
Young (1920). YRK1920
Ren & Fu (2013) calculated an astrometric orbit, combining Hipparcos Ren2013
Intermediate Astrometric Data with spectroscopic elements by
Young (1920). YRK1920
CIA 8 Aa,Ab: Roettenbacher et al. (2015) resolve the RS CVn binary omi Dra
and determined a combined spectroscopic/astrometric orbit. The orbital
parallax is 9.36 +/- 0.10 mas (106.8 +/- 1.1pc), flux ratio in H is
370 +/- 40, the system age 3.0 +/- 0.5 Gyr. Radii are 25.1 +/- 0.3 and
1.0 +/- 0.1 Rsun, luminosities 220 +/- 30 and 1.3 +/- 0.2 Lsun.
Derived masses are 1.35 +/- 0.05 and 0.99 +/- 0.02 Msun. CIA2015c
 
 
REFERENCES
 
 
refcode metd author reference
CIA2015c Kc j Roettenbacher, R.M., Monnier, J., Fekel, F.C., Henry, G.W., Korhonen, H., 2015ApJ...809..159R
CIA2015c Latham, D.W., Muterspaugh, M.W., Williamson, M.H., Baron, F.,
CIA2015c ten Brummelaar, T.A., Che, X., Harmon, R.O., et al.
CIA2015c ApJ 809, 159, 2015
HIP1997d orb - Hipparcos 1997yCat.1239....0E
HIP1997d Hipparcos Catalog, ESA SP-1200, 1997
HIP1997d (DMSA/O Orbital Solutions)
Kiy2008 - Kiyaeva, O.V., Kiselev, A.A. & Izmailov, I.S. 2008SvAL...32..405K
Kiy2008 SvAL 34, 405, 2008
MEv2010 - MacEvoy, B. ...................
MEv2010 private communication, 2010 (see http://www.handprint.com/ASTRO/index.html)
Ren2013 orb - Ren, S. & Fu, Y. 2013AJ....145...81R
Ren2013 AJ 145, 81, 2013
YRK1920 orb - Young, R.K. 1920PDAO....1..263Y
YRK1920 Pub. Dom. Astr. Obs. 1, 263, 1920
 
 
DISCOVERER
 
 
idgroup discov author
1 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
18512+5923 STF2420 BC 2000 3 326 104.0 8.26 12.70 185112.01+592317.8
18512+5923 STF2420 BC 2003 5 326 103.9 8.26 12.67 N 185108.98+592345.8
18512+5923 STF2420 BC 2015 6 326 103.5 8.26 12.67 K3IIIp N 185108.98+592345.8

If you need more information about this double, apply for a data request form to the WDS.

 
 
WDS 18512+5923 STF 2420 BC : VISUAL OBSERVATIONS REPORTS
 
 
No records found.


 
 
WDS 18512+5923 STF 2420 BC : MEASURES
 
 
No records found.

 
 
WDS 18512+5923 : VIRTUAL EYEPIECE
 
 

18512+5923 STF2420A mag 4.77 Sp G7III 18512+5923 CIA   8Ab mag 11 Sp IV 18512+5923 STF2420B sep 36.3 P.A. 320.40 mag 8.26 Sp K3IIIp 18512+5923 STF2420C sep 121.5 P.A. 339.50 mag 12.67 Sp IV virtual eyepiece
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Pass over with the mouse cursor to display the catalog designation.

Radius:
Components only
 
 
WDS 18512+5923 : ALADIN DSS IMAGE @ 18h 51m 08.98s +59° 23' 45.8"
 
 
 
 
WDS 18512+5923 STF 2420 BC : NEIGHBORHOODS
 
 
FoV:
Limit:
Primaries only


18512+5923  STF2420BC distance=0' 18512+5923  STF2420AB distance=1' 18512+5923  STF2420AC distance=1' 18512+5923  CIA   8Aa,Ab distance=1' 18524+5938  STI 867 distance=18' 18519+5948  STI 865 distance=26' 18520+5951  STI 866 distance=29' 18469+5920  STF2410 distance=33' 18545+5946  TOI1307 distance=34' 18459+5924  MLB1079AB distance=41' 18459+5924  MLB1079BC distance=41' 18527+5842  HDS2678 distance=44' 18537+6005  TDT1117 distance=46' 18449+5916  UC 3661 distance=49' 18564+5854  TDS 955 distance=50' 18593+5929  TDT1168 distance=63' 18478+5826  STI2387 distance=65' 18428+5938  STF2398BC distance=66' 18428+5938  STF2398AB distance=66' 18428+5938  POP1224AD distance=66' 18428+5938  STF2398AC distance=66' 18549+5823  STI2397 distance=68' 18437+6005  STI 859 distance=70' 18530+5816  ES 1746 distance=71' 18585+6012  LDS2754 distance=74' 18494+5811  STI2392 distance=74' 18432+5840  TDT1017 distance=76' 18483+6044  LDS2751 distance=83' 18414+5849  STI2381 distance=83' 18401+5922  UC 3633 distance=85' 18459+6040  TDT1041 distance=86' 18575+5814  STF2438 distance=86' 19030+5920  STI 871 distance=91' 18392+5925  TDT 975 distance=92' 19029+5949  LDS2756 distance=92' 18439+6039  ES  189AB distance=93' 18483+5752  STI2390BC distance=95' 18483+5752  STI2390AC distance=95' 18483+5752  GAT   3AB distance=95' 18449+5759  STI2385 distance=98' 18552+5750  HJ 2848AB distance=100' 18552+5750  HJ 2848AC distance=100' 19044+5911  TDT1210 distance=102' 19017+6028  MLB 139AB distance=104' 19017+6028  MLB 139AC distance=104' 18416+6047  STI 857 distance=110' 18399+5815  A   251AB distance=112' 18399+5815  A   251AC distance=112' 18480+6113  LDS2750 distance=112' 18443+6103  STF2403 distance=112' 18417+6051  STI 858 distance=113' grafico limitrofi
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Pass over with the mouse cursor to display the catalog designation.

Show name coord_2000 discov# comp pa sep dist(')
Show 18512+5923 STF2420 BC 326 103.5
Show 18512+5923 STF2420 AB 316 37.6 1
Show 18512+5923 STF2420 AC 324 141.3 1
Show 18512+5923 CIA 8 Aa,Ab 202 0.0 1
Show 18524+5938 STI 867 220 6.1 18
Show 18519+5948 STI 865 179 3.7 26
Show 18520+5951 STI 866 274 3.8 29
Show 18469+5920 STF2410 85 1.7 33
Show 18545+5946 TOI1307 35 0.3 34
Show 18459+5924 MLB1079 AB 203 34.1 41
Show 18459+5924 MLB1079 BC 279 7.4 41
Show 18527+5842 HDS2678 214 0.7 44
Show 18537+6005 TDT1117 44 2.0 46
Show 18449+5916 UC 3661 240 24.1 49
Show 18564+5854 TDS 955 149 0.9 50
Show 18593+5929 TDT1168 250 1.9 63
Show 18478+5826 STI2387 84 12.4 65
Show 18428+5938 STF2398 BC 157 202.7 66
Show 18428+5938 STF2398 AB 181 11.4 66
Show 18428+5938 POP1224 AD 110 100.0 66
Show 18428+5938 STF2398 AC 158 216.8 66
Show 18549+5823 STI2397 235 14.4 68
Show 18437+6005 STI 859 165 11.9 70
Show 18530+5816 ES 1746 114 1.8 71
Show 18585+6012 LDS2754 73 18.4 74
Show 18494+5811 STI2392 142 5.3 74
Show 18432+5840 TDT1017 223 0.5 76
Show 18483+6044 LDS2751 152 7.6 83
Show 18414+5849 STI2381 139 8.7 83
Show 18401+5922 UC 3633 276 49.7 85
Show 18459+6040 TDT1041 7 2.5 86
Show 18575+5814 STF2438 356 0.8 86
Show 19030+5920 STI 871 149 9.2 91
Show 18392+5925 TDT 975 42 0.6 92
Show 19029+5949 LDS2756 287 12.5 92
Show 18439+6039 ES 189 AB 107 3.3 93
Show 18483+5752 STI2390 BC 85 2.9 95
Show 18483+5752 STI2390 AC 100 5.1 95
Show 18483+5752 GAT 3 AB 117 2.3 95
Show 18449+5759 STI2385 143 12.4 98
Show 18552+5750 HJ 2848 AB 289 6.5 100
Show 18552+5750 HJ 2848 AC 52 30.0 100
Show 19044+5911 TDT1210 327 0.8 102
Show 19017+6028 MLB 139 AB 126 5.2 104
Show 19017+6028 MLB 139 AC 268 35.8 104
Show 18416+6047 STI 857 176 4.5 110
Show 18399+5815 A 251 AB 53 4.0 112
Show 18399+5815 A 251 AC 78 13.5 112
Show 18480+6113 LDS2750 136 2.2 112
Show 18443+6103 STF2403 278 1.1 112
Show 18417+6051 STI 858 10 4.2 113

 
 
WDS 18512+5923 : COMPONENTS
 
 
  A Ab B
Ab pa=191.6°
sep=0.01"
 
B pa=320.4°
sep=36.33"
pa=320.4°
sep=36.33"
 
C pa=339.5°
sep=121.55"
pa=339.5°
sep=121.55"
pa=347.2°
sep=88.02"
 
 
18512+5923 A
 
 
Name Omi Dra Coord arcsec 2000 185112.01+592317.8 Mag 4.77 Spectral class G7III (yellow)
PmRA 78.00 PmDE 25.0 SAO 31218 HIP 92512
Tycho2 3930-01790-1 HD 175306 HR 7125 GC 25905
BD BD+59 1925 Bayer Omicron Draconis Bayer name Omi Dra Flamsteed 47 Draconis
Flamsteed name 47 Dra FK5 707
Tycho2
Tycho2 3930-01790-1 Pflag RAmdeg 282.80040920 DEmdeg 59.38834934
PmRA 79.4 PmDE 24.8 E RAmdeg 3 E DEmdeg 3
E pmRA 0.6 E pmDE 0.8 EpRAm 1991.21 EpDEm 1991.35
Num 18 Q RAmdeg 1.3 Q DEmdeg 1.7 Q pmRA 1.2
Q pmDE 1.5 BTmag 6.129 E BTmag 0.014 VTmag 4.765
E VTmag 0.009 Prox 363 TYC T HIP 92512
CCDM RAdeg 282.80004778 DEdeg 59.38829139 EpRA 1990 1.66
EpDE 1990 1.64 E RAdeg 3.4 E DEdeg 3.4 Posflg
Corr 0.0
SAO
SAO 31218 DelFlag RA1950 PmRA1950 0.0095
DE1950 PmDE1950 0.027 Vmag 4.9 SpType K0
Double code Source 74 CatNum 707 DM BD+59 1925
DMcomp A BDsup HD 175306 M HD 0
GC 25905 RA1950rad 4.93257513 DE1950rad 1.0354474 PmRA2000 0.0102
PmDE2000 0.027
Hipparcos
Catalog H HIP 92512 Proxy RAhms 18 51 12.01
DEdms +59 23 17.8 Vmag 4.63 VarFlag 1 R Vmag H
RAdeg 282.8 DEdeg 59.3883 AstroRef + Plx 10.12
CCDM 18512+5924 N CCDM I Nsys 1 Ncomp 1
MultFlag O Source Qual M HIP
Theta Rho HD 175306 BD BD+59 1925
CD CP Dm number +59 1925 VIred 1.2
SpType K0II-III SB R SpType Coord arcsec 2000 185112.01+592317.8
Hipparcos 2
HIP 92512 Sn 75 So 4 Nc 1
RArad 4.9357916014 DErad 1.0365211815 Plx 9.54 PmRA 77.47
PmDE 25.37 E RArad 0.2 E DErad 0.21 E Plx 0.21
E pmRA 0.24 E pmDE 0.28 Hpmag 4.7911 E Hpmag 0.0009
SHp 0.011 VA 1 BV 1.185 E BV 0.013
VI 1.2
 
 
18512+5923 Ab
 
 
Coord arcsec 2000 185112.01+592317.8 Mag 11 Spectral class IV Calc delta mag 6.23
Calc coord yes
 
 
18512+5923 B
 
 
Coord arcsec 2000 185108.98+592345.8 Coord calc 185108.98+592345.8 Mag 8.26 Spectral class K3IIIp (yellow-orange)
Calc delta mag 3.49
 
 
18512+5923 C
 
 
Coord arcsec 2000 185106.43+592511.7 Mag 12.67 Spectral class IV PmRA 0.00
PmDE -3.0 Calc delta mag 7.9 Calc coord yes