21521+2748 HO 171 (HD 207931)

 
 
21h 52m 08.95s +27° 48' 02.2" P.A. 342.00 sep 0.8 mag 9.36,9.50 Sp A3 dist. 512.82 pc (1672.82 l.y.)
 
 
Coord 2000 21521+2748 Discov num HO  171 Comp Coord arcsec 2000 21 52 08.95 +27 48 02.2
Date first 1884 Date last 2016 Obs 64
Pa first 359 Pa last 341.5 P.A. Now (θ) 341.5°
Sep first 0.6 Sep last 0.758 Sep. Now (ρ) 0.758"
Mag pri 9.36 Mag sec 9.50 delta mag (ΔM) 0.14 Spectral class A3 (white)
Pri motion ra +013 Sec motion ra +013
Pri motion dec +004 Sec motion dec +004
Notes
Nature of this double is uncertain.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Name HD 207931 Constellation Pegasus SAO 90057 HIP 107946
Tycho2 2210-00105-1 Gaia DR2 1800212177498483840 HD 207931 BD BD+27 4184
Distance 512.82 Distance ly 1672.82
 
 
WDS 21521+2748 HO 171 (HD 207931) : NOTES
 
 
No records found.

 
 
REFERENCES
 
 
refcode metd author reference
Ho_1883 Ma j Hough, G.W. 1883MNRAS..43..371H
Ho_1883 MNRAS 43, 371, 1883 (data also in Ho_1890) 1890AN....125....1H
Ho_1884 Ma j Hough, G.W. 1884MNRAS..44..365H
Ho_1884 MNRAS 44, 365, 1884 (data also in Ho_1890) 1890AN....125....1H
Ho_1885 Ma j Hough, G.W. 1885MNRAS..45..417H
Ho_1885 MNRAS 45, 417, 1885 (data also in Ho_1890) 1890AN....125....1H
Ho_1886 Ma j Hough, G.W. 1886MNRAS..46..393H
Ho_1886 MNRAS 46, 393, 1886 (data also in Ho_1890) 1890AN....125....1H
Ho_1887 Ma j Hough, G.W. 1887AN....116..273H
Ho_1887 AN 116, 273, 1887
Ho_1890 Ma j Hough, G.W. 1890AN....125....1H
Ho_1890 AN 125, 1, 1890
Ho_1890b Ma j Hough, G.W. 1890AJ......9..177H
Ho_1890b AJ 9, 177, 1890 (some data also in Ho_1890 or Ho_1894b) 1890AN....125....1H
Ho_1894a Ma - Hough, G.W. 1894MNRAS..54..251H
Ho_1894a MNRAS 54, 251, 1894
Ho_1894b Ma j Hough, G.W. (HO 304 - 490) 1894AN....135..281H
Ho_1894b AN 135, 281, 1894
Ho_1894c Ma - Hough, G.W. (measure by Dembowski, H.) 1894AN....135..281H
Ho_1894c AN 135, 281, 1894
Ho_1899a Ma j Hough, G.W. 1899AN....149..65H
Ho_1899a AN 149, 65, 1899
Ho_1899b Ma - Hough, G.W. (measure by Burnham, S.W.) 1899AN....149..65H
Ho_1899b AN 149, 65, 1899
Ho_1907 Ma - Hough, G.W. 1907PFAO....3c...1D
Ho_1907 Pub. Univ. Penn. 3, Pt. 3, 1907 (measures sent to Doolittle)
Ho_1932A Ma - Hough, G.W. 1932QB821.A43......
Ho_1932A cited in ADS, 1932 (unpublished measures sent to Aitken in manuscript by Fox)
 
 
WDS HISTORIC DATA
 
 
coord_2000 discov_num comp epoch obs pa sep mag_pri mag_sec spectr notes coord_arcsec_2000
21521+2748 HO 171 2000 51 341 0.7 9.36 9.50 A3 D 215208.95+274802.2
21521+2748 HO 171 2009 53 342 0.7 9.36 9.50 A3 D 215208.95+274802.2
21521+2748 HO 171 2010 56 342 0.7 9.36 9.50 A3 D 215208.95+274802.2
21521+2748 HO 171 2015 57 342 0.7 9.36 9.50 A3 215208.95+274802.2
21521+2748 HO 171 2016 58 342 0.8 9.36 9.50 A3 215208.95+274802.2

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WDS 21521+2748 HO 171 (HD 207931) : VISUAL OBSERVATIONS REPORTS
 
 
No records found.


 
 
WDS 21521+2748 HO 171 (HD 207931) : MEASURES
 
 
No records found.

 
 
WDS 21521+2748 (HD 207931) : VIRTUAL EYEPIECE
 
 

21521+2748 HO  171A mag 9.36 Sp A3 21521+2748 HO  171B sep 0.8 P.A. 343.50 mag 9.5 virtual eyepiece
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Radius:
Components only
 
 
WDS 21521+2748 (HD 207931) : ALADIN DSS IMAGE @ 21h 52m 08.95s +27° 48' 02.2"
 
 
 
 
WDS 21521+2748 HO 171 (HD 207931) : NEIGHBORHOODS
 
 
FoV:
Limit:
Primaries only


21521+2748  HO  171 distance=0' 21505+2756  AZC 116 distance=24' 21503+2754  MLB 576 distance=26' 21524+2823  NSN  67 distance=35' 21539+2821  WSI   8 distance=41' 21559+2753  HJ 1704 distance=50' 21536+2701  ES  523 distance=51' 21555+2724  A   303AB distance=51' 21555+2724  STJ   1AC distance=51' 21556+2823  MLB 577BC distance=58' 21556+2823  MLB 577AB distance=59' 21477+2740  CVR 922 distance=60' 21480+2819  MLB 541 distance=63' 21517+2852  SHN 256 distance=64' 21567+2721  GRV 521 distance=67' 21517+2856  HLD  49 distance=68' 21573+2738  NSN 749 distance=70' 21540+2852  GRV 519 distance=70' 21561+2701  J   854 distance=72' 21538+2856  MLB 495 distance=73' 21547+2643  CVR 924 distance=74' 21553+2648  A   302 distance=74' 21553+2850  COU 836 distance=75' 21468+2718  HO  608 distance=77' 21580+2755  KPP3375 distance=78' 21474+2834  A   300AB distance=78' 21474+2834  A   300AC distance=78' 21474+2834  A   300AD distance=78' 21491+2640  LDS4912 distance=79' 21561+2846  COU 837AB distance=79' 21561+2846  GII 104AC distance=79' 21510+2911  A   889AB distance=84' 21510+2911  A   889Aa,Ab distance=84' 21462+2817  MLB 540AB distance=87' 21462+2817  MLB 540AC distance=87' 21462+2817  ABH 152AD distance=87' 21462+2817  ABH 152AE distance=87' 21585+2725  A   304AB distance=88' 21585+2725  A   304AB,C distance=88' 21474+2855  AG  420 distance=92' 21565+2900  HJ 1706 distance=93' 21456+2709  MLB1050 distance=95' 21457+2708  BKO 633 distance=95' 21453+2722  HO  606 distance=95' 21593+2800  MLB 578 distance=96' 21454+2819  J  3145 distance=97' 21575+2856  LEP 104 distance=99' 21564+2627  KPP3374 distance=99' 21461+2855  BRT  58 distance=105' 21469+2907  CVR 919 distance=106' 21444+2824  KPP3373 distance=109' grafico limitrofi
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Show name coord_2000 discov# comp pa sep dist(')
Show 21521+2748 HO 171 342 0.8
Show 21505+2756 AZC 116 353 20.9 24
Show 21503+2754 MLB 576 267 13.1 26
Show 21524+2823 NSN 67 285 5.1 35
Show 21539+2821 WSI 8 142 0.1 41
Show 21559+2753 HJ 1704 317 5.6 50
Show 21536+2701 ES 523 95 6.2 51
Show 21555+2724 A 303 AB 52 2.3 51
Show 21555+2724 STJ 1 AC 337 3.4 51
Show 21556+2823 MLB 577 BC 18 6.4 58
Show 21556+2823 MLB 577 AB 300 48.8 59
Show 21477+2740 CVR 922 225 9.9 60
Show 21480+2819 MLB 541 340 9.9 63
Show 21517+2852 SHN 256 -1 0.6 64
Show 21567+2721 GRV 521 306 45.5 67
Show 21517+2856 HLD 49 341 2.1 68
Show 21573+2738 NSN 749 84 1.7 70
Show 21540+2852 GRV 519 318 22.1 70
Show 21561+2701 J 854 305 2.8 72
Show 21538+2856 MLB 495 134 4.8 73
Show 21547+2643 CVR 924 252 21.1 74
Show 21553+2648 A 302 239 5.8 74
Show 21553+2850 COU 836 161 1.3 75
Show 21468+2718 HO 608 130 0.6 77
Show 21580+2755 KPP3375 114 14.2 78
Show 21474+2834 A 300 AB 252 2.3 78
Show 21474+2834 A 300 AC 29 7.5 78
Show 21474+2834 A 300 AD 170 8.4 78
Show 21491+2640 LDS4912 134 16.5 79
Show 21561+2846 COU 837 AB 150 1.2 79
Show 21561+2846 GII 104 AC 105 1.9 79
Show 21510+2911 A 889 AB 15 0.2 84
Show 21510+2911 A 889 Aa,Ab 323 0.0 84
Show 21462+2817 MLB 540 AB 256 4.1 87
Show 21462+2817 MLB 540 AC 322 8.7 87
Show 21462+2817 ABH 152 AD 68 41.8 87
Show 21462+2817 ABH 152 AE 96 80.1 87
Show 21585+2725 A 304 AB 131 0.6 88
Show 21585+2725 A 304 AB,C 240 13.9 88
Show 21474+2855 AG 420 145 7.5 92
Show 21565+2900 HJ 1706 260 10.0 93
Show 21456+2709 MLB1050 67 6.9 95
Show 21457+2708 BKO 633 18 7.4 95
Show 21453+2722 HO 606 93 18.4 95
Show 21593+2800 MLB 578 151 3.1 96
Show 21454+2819 J 3145 112 5.4 97
Show 21575+2856 LEP 104 189 85.0 99
Show 21564+2627 KPP3374 328 11.3 99
Show 21461+2855 BRT 58 165 4.4 105
Show 21469+2907 CVR 919 201 23.5 106
Show 21444+2824 KPP3373 242 2.1 109

 
 
WDS 21521+2748 : COMPONENTS
 
 
  A
B pa=343.5°
sep=0.75"
 
 
21521+2748 A
 
 
Componente originario normalizzato AB Name HD 207931 Coord arcsec 2000 215208.95+274802.2 Mag 9.36
Spectral class A3 (white) PmRA 13.00 PmDE 4.0 SAO 90057
HIP 107946 Tycho2 2210-00105-1 HD 207931 BD BD+27 4184
Tycho2
Tycho2 2210-00105-1 Pflag RAmdeg 328.03725333 DEmdeg 27.80070696
PmRA 12.9 PmDE 4.0 E RAmdeg 10 E DEmdeg 11
E pmRA 1.4 E pmDE 1.3 EpRAm 1990.62 EpDEm 1990.17
Num 8 Q RAmdeg 0.5 Q DEmdeg 0.7 Q pmRA 0.6
Q pmDE 0.7 BTmag 9.288 E BTmag 0.022 VTmag 8.900
E VTmag 0.018 Prox 999 TYC T HIP 107946
CCDM AB RAdeg 328.03721944 DEdeg 27.80069750 EpRA 1990 1.68
EpDE 1990 1.68 E RAdeg 10.2 E DEdeg 11.4 Posflg P
Corr -0.1
SAO
SAO 90057 DelFlag RA1950 PmRA1950 0.0014
DE1950 PmDE1950 -0.007 Vmag 8.6 SpType A3
Double code Source 34 CatNum 12960 DM BD+27 4184
DMcomp BDsup HD 207931 M HD 0
GC RA1950rad 5.71550321 DE1950rad 0.48110212 PmRA2000 0.0015
PmDE2000 -0.012
Hipparcos
Catalog H HIP 107946 Proxy H RAhms 21 52 08.94
DEdms +27 48 02.2 Vmag 8.73 VarFlag R Vmag H
RAdeg 328.037 DEdeg 27.8006 AstroRef B Plx 5.05
CCDM 21521+2748 N CCDM I Nsys 1 Ncomp 2
MultFlag C Source Qual A M HIP BA
Theta 344 Rho 0.793 HD 207931 BD BD+27 4184
CD CP Dm number +27 4184 VIred 0.28
SpType A3 R SpType Coord arcsec 2000 215208.94+274802.2
Hipparcos 2
HIP 107946 Sn 15 So 3 Nc 2
RArad 5.7253300024 DErad 0.4852119924 Plx 1.95 PmRA 11.96
PmDE 6.01 E RArad 1.74 E DErad 2.54 E Plx 3.23
E pmRA 1.62 E pmDE 2.78 Hpmag 8.8107 E Hpmag 0.0027
SHp 0.018 VA 0 BV 0.317 E BV 0.025
VI 0.37
CCDM
Ccdm 21521+2748 RComp Comp A Note1
Note2 Discov num DRAs 2.97 DDEs 2.6
R dRAs 10 Year Theta Rho
Obs 2 Vmag 9.5 Sp A3 PmNote *
PmRA 20 PmDE 11 Dm number +27 4184 Cat1 BD
Name2 +27 2520 Cat2 AGK2/3 HD 207931 M HD
ADS BDS A15401 M ADS BDS N IDS IDS 21476N2719A
HIC 107946
 
 
21521+2748 B
 
 
Componente originario normalizzato AB Coord arcsec 2000 215208.93+274802.9 Mag 9.5 PmRA 13.00
PmDE 4.0 Calc delta mag 0.14 Calc coord yes
CCDM
Ccdm 21521+2748 RComp Comp B Note1
Note2 Discov num HO 171 DRAs DDEs
R dRAs Year 1957 Theta 166 Rho 0.8
Obs 24 Vmag 9.5 Sp PmNote
PmRA PmDE Dm number Cat1
Name2 Cat2 HD M HD
ADS BDS A15401 M ADS BDS N IDS IDS 21476N2719B
HIC 107946