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Current system
21080+0509
STT 527
HD 201221


Nearby doubles
20' : 21069+0458
UC 4382

22' : 21094+0502
STT 429

31' : 21080+0539
HJ 3011AB

44' : 21091+0429
J 848

48' : 21096+0550
TDT2793

56' : 21046+0530
BUP 223

57' : 21090+0410
HJ 5515AB

62' : 21054+0557
BUP 224

63' : 21093+0410
BU 1330AB

66' : 21069+0405
BAL2555

72' : 21093+0618
TDT2789

77' : 21126+0437
HJ 3013

82' : 21080+0630
SKF2741

85' : 21024+0513
A 615

89' : 21109+0352
HO 151

91' : 21131+0558
GWP3043AB

91' : 21140+0457
GWP3048

92' : 21041+0359
TOK 371

92' : 21032+0411
BAL2554

94' : 21138+0545
KPP3367

94' : 21101+0341
BAL2558

96' : 21090+0643
STT 428

96' : 21020+0436
CVR 884

98' : 21139+0427
BAL2977

102' : 21145+0441
BU 682AB

104' : 21102+0331
UC 4396



Selections
Full WDS
Binocular doubles
Binary Systems
Triple Systems
Quadruple Systems
Multiple Systems
Neglected List I
Neglected List II
Observed
Herschel, W.
Herschel, J.F.W.
Struve, Otto
Struve, F.G.W.

21080+0509 STT 527 (HD 201221)

 
 
21h 08m 00.68s +05° 09' 06.0" P.A. 114.00 sep 0.4 mag 7.14,8.14 Sp A2V dist. 219.78 pc (716.92 l.y.)
 
 
Coord 2000 21080+0509 Discov num STT 527 Comp Coord arcsec 2000 21 08 00.68 +05 09 06.0
Date first 1846 Date last 2016 Obs 84
Pa first 297 Pa last 113.9 P.A. Now (θ) 113.9°
Sep first 0.3 Sep last 0.416 Sep. Now (ρ) 0.416"
Mag pri 7.14 Mag sec 8.14 delta mag (ΔM) 1 Spectral class A2V (white)
Pri motion ra -016 Sec motion ra
Pri motion dec -010 Sec motion dec
Notes O (Orbital solution)
This double is physical.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Name HD 201221 Constellation Equuleus SAO 126562 HIP 104324
Tycho2 0535-02156-1 Gaia DR2 1733031127982160640 HD 201221 GC 29538
ADS 14666 BD BD+04 4615 Distance 219.78 Distance ly 716.92
 
 
ORBITAL ELEMENTS
 
 
Period (P)561.15y Periastron (T)1950.18y Semi-major axis (a)0.5576a
Eccentricity (e)0.4192 Inclination (i)117.09° Longitude of periastron (ω)240.24°
Node (Ω)91.3° Notes ReferencePop1995d
Equinox2000 Last observation1987 Grade4(1=Definitive, 9=Indet.)
label theta rho
2000 117.3 0.310
2001 116.5 0.317
2002 115.7 0.323
2003 114.9 0.329
2004 114.1 0.335
2005 113.4 0.341
2006 112.7 0.346
2007 112.0 0.352
2008 111.4 0.358
2009 110.7 0.364
2010 110.1 0.370
2011 109.5 0.375
2012 109.0 0.381
2013 108.4 0.386
2014 107.9 0.392
2015 107.3 0.397
2016 106.8 0.403
2017 106.3 0.408
2018 105.8 0.413
2019 105.3 0.418
2020 104.9 0.423
2021 104.4 0.428
2022 104.0 0.433
2023 103.5 0.438
2024 103.1 0.443
2025 102.7 0.448
2026 102.3 0.453
2027 101.9 0.457
2028 101.5 0.462
2029 101.1 0.466
2030 100.7 0.471
2031 100.4 0.475
2032 100.0 0.480
2033 99.7 0.484
2034 99.3 0.488
2035 99.0 0.492
2036 98.6 0.496
2037 98.3 0.500
2038 98.0 0.504
2039 97.7 0.508
2040 97.3 0.512
2041 97.0 0.516
2042 96.7 0.519
2043 96.4 0.523
2044 96.1 0.526
2045 95.8 0.530
2046 95.5 0.533
2047 95.2 0.537
2048 95.0 0.540
2049 94.7 0.543
2050 94.4 0.547


 
 grafico orbita
Note: Theta is PA, Rho is Sep. For yearly orbits, data refer to Jan 1st.


 
  


wds21080%2B0509a.png orbit plot
Measures: green=micrometric, blue=interferometric, purple=photographic		  
 
 
WDS 21080+0509 STT 527 (HD 201221) : NOTES
 
 
No records found.

 
 
REFERENCES
 
 
refcode metd author reference
Pop1995d orb - Popovic, G.M. & Pavlovic, R. 1995BOBeo.151...45P
Pop1995d Bull. Obs. Astron. Belgrade #151, 45, 1995
 
 
DISCOVERER
 
 
idgroup discov author
1 POP Popovic, G.M.
 
 
WDS HISTORIC DATA
 
 
coord_2000 discov_num comp epoch obs pa sep mag_pri mag_sec spectr notes coord_arcsec_2000
21080+0509 STT 527 2004 85 123 0.3 7.14 8.14 A2V NOD 210800.68+050906.0
21080+0509 STT 527 2008 86 115 0.4 7.14 8.14 A2V NOD 210800.68+050906.0
21080+0509 STT 527 2016 82 114 0.4 7.14 8.14 A2V O 210800.68+050906.0

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

 
 
WDS 21080+0509 STT 527 (HD 201221) : VISUAL OBSERVATIONS REPORTS
 
 
No records found.


 
 
WDS 21080+0509 STT 527 (HD 201221) : MEASURES
 
 
No records found.

 
 
WDS 21080+0509 (HD 201221) : VIRTUAL EYEPIECE
 
 

21080+0509 STT 527A mag 7.14 Sp A2V 21080+0509 STT 527B sep 0.4 P.A. 114.00 mag 8.14 virtual eyepiece
Click on the map to see the double of your interest.
Pass over with the mouse cursor to display the catalog designation.
Radius:
Components only
 
 
WDS 21080+0509 (HD 201221) : ALADIN DSS IMAGE @ 21h 08m 00.68s +05° 09' 06.0"
 
 
 
 
WDS 21080+0509 STT 527 (HD 201221) : NEIGHBORHOODS
 
 
FoV:
Limit:
Primaries only

21080+0509 STT 527 distance=0' 21069+0458 UC 4382 distance=20' 21094+0502 STT 429 distance=22' 21080+0539 BU 9018CD distance=30' 21080+0539 HJ 3011AB distance=31' 21080+0539 BU 9018AC distance=31' 21091+0429 J 848 distance=44' 21096+0550 TDT2793 distance=48' 21046+0530 BUP 223 distance=56' 21090+0410 HJ 5515AB distance=57' 21090+0410 HJ 5515AC distance=57' 21054+0557 BUP 224 distance=62' 21093+0410 BU 1330AB distance=63' 21069+0405 BAL2555 distance=66' 21093+0618 TDT2789 distance=72' 21126+0437 HJ 3013 distance=77' 21080+0630 SKF2741 distance=82' 21024+0513 A 615 distance=85' 21109+0352 HO 151 distance=89' 21131+0558 GWP3043AB distance=91' 21131+0558 GWP3044AC distance=91' 21140+0457 GWP3048 distance=91' 21041+0359 TOK 371 distance=92' 21032+0411 BAL2554 distance=92' 21138+0545 KPP3367 distance=94' 21101+0341 BAL2558 distance=94' 21090+0643 STT 428 distance=96' 21020+0436 CVR 884 distance=96' 21139+0427 BAL2977 distance=98' 21145+0441 BU 682AB distance=102' 21145+0441 BU 682AC distance=102' 21102+0331 UC 4396 distance=104' 21014+0542 ELP 47 distance=104' 21149+0440 BAL2979 distance=107' 21047+0332 SE 3Aa,Ab distance=109' 21047+0332 STF2749A,BC distance=109' 21047+0332 SE 3AD distance=109' 21047+0332 STF2749AC distance=109' 21047+0332 SE 3BC distance=109' 21024+0625 TDT2708 distance=113' 21158+0515 WRH 35 (Kitalpha) distance=117' 21126+0644 KPP 6 distance=118' 21009+0419 BAL2553 distance=119' 21006+0554 GRV 403 distance=119' 21129+0333 UC 4407 distance=121' 21053+0704 ENG 80AB distance=122' 21053+0704 ENG 80AC distance=122' 21020+0346 HO 148 distance=123' 21156+0419 TDT2865 distance=125' 21124+0656 BRT2190 distance=125' 21147+0354 UC 4420 distance=126' grafico limitrofi
Click on the map to see the double of your interest.
Pass over with the mouse cursor to display the catalog designation.
Show name coord_2000 discov# comp pa sep dist(')
Show 21080+0509 STT 527 114 0.4 0
Show 21069+0458 UC 4382 272 53.5 20
Show 21094+0502 STT 429 -1 -1.0 22
Show 21080+0539 BU 9018 CD 340 6.0 30
Show 21080+0539 HJ 3011 AB 273 10.6 31
Show 21080+0539 BU 9018 AC 252 139.3 31
Show 21091+0429 J 848 141 2.8 44
Show 21096+0550 TDT2793 354 0.5 48
Show 21046+0530 BUP 223 252 82.5 56
Show 21090+0410 HJ 5515 AB 126 14.4 57
Show 21090+0410 HJ 5515 AC 68 47.8 57
Show 21054+0557 BUP 224 301 30.4 62
Show 21093+0410 BU 1330 AB 54 3.7 63
Show 21069+0405 BAL2555 164 17.1 66
Show 21093+0618 TDT2789 20 2.0 72
Show 21126+0437 HJ 3013 119 11.3 77
Show 21080+0630 SKF2741 40 1.9 82
Show 21024+0513 A 615 129 3.5 85
Show 21109+0352 HO 151 17 1.6 89
Show 21131+0558 GWP3043 AB 300 81.7 91
Show 21131+0558 GWP3044 AC 139 96.7 91
Show 21140+0457 GWP3048 278 115.4 91
Show 21041+0359 TOK 371 272 0.1 92
Show 21032+0411 BAL2554 307 21.3 92
Show 21138+0545 KPP3367 245 1.8 94
Show 21101+0341 BAL2558 38 2.2 94
Show 21090+0643 STT 428 256 24.0 96
Show 21020+0436 CVR 884 312 11.4 96
Show 21139+0427 BAL2977 305 17.1 98
Show 21145+0441 BU 682 AB 102 5.7 102
Show 21145+0441 BU 682 AC 179 93.0 102
Show 21102+0331 UC 4396 215 59.1 104
Show 21014+0542 ELP 47 25 6.3 104
Show 21149+0440 BAL2979 182 11.5 107
Show 21047+0332 SE 3 Aa,Ab 153 0.6 109
Show 21047+0332 STF2749 A,BC 179 3.2 109
Show 21047+0332 SE 3 AD 78 114.3 109
Show 21047+0332 STF2749 AC 176 3.5 109
Show 21047+0332 SE 3 BC 136 0.7 109
Show 21024+0625 TDT2708 27 0.8 113
Show Kitalpha 21158+0515 WRH 35 104 0.0 117
Show 21126+0644 KPP 6 61 6.7 118
Show 21009+0419 BAL2553 110 10.6 119
Show 21006+0554 GRV 403 116 33.5 119
Show 21129+0333 UC 4407 306 58.2 121
Show 21053+0704 ENG 80 AB 240 64.6 122
Show 21053+0704 ENG 80 AC 106 169.4 122
Show 21020+0346 HO 148 201 2.2 123
Show 21156+0419 TDT2865 112 2.1 125
Show 21124+0656 BRT2190 15 3.7 125
Show 21147+0354 UC 4420 80 51.3 126

 
 
WDS 21080+0509 : COMPONENTS
 
 
  A
B pa=114.0°
sep=0.41"
 
 
21080+0509 A
 
 
Name HD 201221 Coord arcsec 2000 210800.68+050906.0 Mag 7.14 Spectral class A2V (white)
PmRA -16.00 PmDE -10.0 SAO 126562 HIP 104324
Tycho2 0535-02156-1 HD 201221 GC 29538 BD BD+04 4615
Tycho2
Tycho2 0535-02156-1 Pflag RAmdeg 317.00280104 DEmdeg 5.15161585
PmRA -14.8 PmDE -17.6 E RAmdeg 4 E DEmdeg 5
E pmRA 1.4 E pmDE 1.3 EpRAm 1991.67 EpDEm 1991.63
Num 12 Q RAmdeg 0.8 Q DEmdeg 1.2 Q pmRA 0.8
Q pmDE 1.3 BTmag 6.891 E BTmag 0.015 VTmag 6.758
E VTmag 0.010 Prox 999 TYC T HIP 104324
CCDM AB RAdeg 317.00283500 DEdeg 5.15165556 EpRA 1990 1.80
EpDE 1990 1.85 E RAdeg 4.3 E DEdeg 4.5 Posflg P
Corr -0.2
SAO
SAO 126562 DelFlag RA1950 PmRA1950 -0.001
DE1950 PmDE1950 -0.008 Vmag 6.7 SpType A2
Double code Source 70 CatNum 29538 DM BD+04 4615
DMcomp BDsup HD 201221 M HD 0
GC 29538 RA1950rad 5.52185766 DE1950rad 0.08638133 PmRA2000 -0.0008
PmDE2000 -0.012
Hipparcos
Catalog H HIP 104324 Proxy H RAhms 21 08 00.68
DEdms +05 09 06.0 Vmag 6.73 VarFlag R Vmag H
RAdeg 317.003 DEdeg 5.15166 AstroRef * Plx 4.2
CCDM 21080+0509 N CCDM I Nsys 1 Ncomp 2
MultFlag C Source Qual A M HIP AB
Theta 130 Rho 0.25 HD 201221 BD BD+04 4615
CD CP Dm number +04 4615 VIred 0.12
SpType A2 R SpType Coord arcsec 2000 210800.68+050906.0
Hipparcos 2
HIP 104324 Sn 55 So 3 Nc 2
RArad 5.532743255 DErad 0.0899133764 Plx 4.55 PmRA -19.01
PmDE -16.27 E RArad 0.47 E DErad 0.54 E Plx 0.68
E pmRA 0.67 E pmDE 0.56 Hpmag 6.7752 E Hpmag 0.0009
SHp 0.008 VA 0 BV 0.127 E BV 0.008
VI 0.14
CCDM
Ccdm 21080+0509 RComp Comp A Note1
Note2 Discov num DRAs 0.69 DDEs 6.8
R dRAs 10 Year Theta Rho
Obs 2 Vmag 6.9 Sp A2 PmNote *
PmRA -4 PmDE 2 Dm number +04 4615 Cat1 BD
Name2 +04 2864 Cat2 AGK2/3 HD 201221 M HD
ADS BDS A14666 M ADS BDS N IDS IDS 21030N0445A
HIC 104324
 
 
21080+0509 B
 
 
Coord arcsec 2000 210800.71+050905.8 Mag 8.14 Calc delta mag 1 Calc coord yes
CCDM
Ccdm 21080+0509 RComp Comp B Note1 *
Note2 Discov num STT 527 DRAs DDEs
R dRAs Year 1960 Theta 201 Rho 0.1
Obs 99 Vmag 8.4 Sp PmNote
PmRA PmDE Dm number Cat1
Name2 Cat2 HD M HD
ADS BDS A14666 M ADS BDS N IDS IDS 21030N0445B
HIC 104324