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Current system
21561+2420
STT 454 AB
HD 208503


Nearby doubles
12' : 21553+2424
POU5568AB

13' : 21567+2412
POU5579

15' : 21551+2417
POU5563

16' : 21556+2406
POU5572

17' : 21549+2417
POU5562

22' : 21573+2408
POU5584

23' : 21545+2411
POU5559

26' : 21556+2356
POU5571

26' : 21543+2425
POU5557

26' : 21568+2357
POU5580

27' : 21561+2354
POU5575

28' : 21575+2402
LDS4927

29' : 21576+2440
POU5589

29' : 21542+2409
POU5556

30' : 21578+2437
POU5590

31' : 21574+2446
POU5586

32' : 21574+2354
POU5585

34' : 21559+2347
TDT3246

36' : 21583+2440
POU5592

36' : 21553+2454
POU5567

37' : 21564+2344
POU5578

38' : 21551+2345
POU5564

38' : 21588+2427
COU 839

40' : 21539+2446
POU5555

40' : 21590+2417
POU5595

40' : 21572+2457
POU5583



Selections
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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.

21561+2420 STT 454 AB (HD 208503)

 
 
21h 56m 04.91s +24° 20' 23.6" P.A. 278.00 sep 7.4 mag 7.97,10.04 Sp A0 dist. 271.74 pc (886.42 l.y.)
 
 
Coord 2000 21561+2420 Discov num STT 454 Comp AB Coord arcsec 2000 21 56 04.91 +24 20 23.6
Date first 1843 Date last 2018 Obs 40
Pa first 278 Pa last 278 P.A. Now (θ) 278°
Sep first 6.8 Sep last 7.429 Sep. Now (ρ) 7.429"
Mag pri 7.97 Mag sec 10.04 delta mag (ΔM) 2.07 Spectral class A0 (white)
Pri motion ra +012 Sec motion ra +007
Pri motion dec -012 Sec motion dec -013
Notes
rPM=0.3
Nature of this double is uncertain.
 
 
21561+2420 SYSTEM COMPONENTS
 
 
Show name SAO coord wds_name last obs pa sep mag1 mag2 d_mag orb current
Show HD 208503 21 56 05 +24 20 24 STT 454 AB 2018 40 278 7.4 7.97 10.04 2.07 <===
Show 21 56 05 +24 20 24 STT 454 AC 2015 12 264 43.0 7.97 12.08 4.11
Triple system
3 estimated visually detectable stars in this system
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Name HD 208503 Constellation Pegasus HIP 108270 Tycho2 2203-01481-1
Gaia DR2 1795239709175455488 HD 208503 ADS 15461 BD BD+23 4428
Distance 271.74 Distance ly 886.42
 
 
WDS 21561+2420 STT 454 AB (HD 208503) : NOTES
 
 
No records found.

 
 
REFERENCES
 
 
refcode metd author reference
STTA (O. Struve DD - Appendix list) ...................
Stt1864 Ma - Struve, O. 1864MNRAS..24..149S
Stt1864 MNRAS 24, 149, 1864
Stt1866 orb - Struve, O. .
Stt1866 Bull. Imp. Acad. Sci. St. Petersburg, 1866
Stt1874 orb - Struve, O. .
Stt1874 Compte Rendus 79, 1467, 1874
Stt1875 orb - Struve, O. 1875MNRAS..35..367S
Stt1875 MNRAS 35, 367, 1875
Stt1878 Ma - Struve, O. 1878ObPul...9....1S
Stt1878 Pulkova Observations 9, 1, 1878
Stt1879A Ma - Struve, O. 1879Obs.....2..304G
Stt1879A cited by Gledhill (Obs 2, 304, 1879)
Stt1879B Ma - Struve, O. 1879Obs.....3..245G
Stt1879B cited by Gledhill (Obs 3, 245, 1879)
Stt1879C Ma - Struve, O. 1879Obs.....2..344G
Stt1879C cited by Gledhill (Obs 2, 344, 1879)
Stt1880A Ma - Struve, O. 1880Obs.....2..605H
Stt1880A cited by Hunt (Obs. 3, 605, 1880)
Stt1880B Ma - Struve, O. 1880Obs.....3..535G
Stt1880B cited by Gledhill (Obs 3, 535, 1880)
Stt1880C Ma - Struve, O. 1880MNRAS..40..497B
Stt1880C cited by Burnham (MNRAS 40, 497, 1880)
Stt1884A Ma - Struve, O. 1884AReg...22..216S
Stt1884A cited by Sadler (Astr. Register 22, 216, 1884)
Stt1893a Ma j Struve, O. 1893ObPul..10....1S
Stt1893a Pulkova Obs. Observations 10, 1, 1893
Stt1906A Ma - Struve, O. 1906MmRAS..56....1L
Stt1906A cited by Lewis (MemRAS 56, 1, 1906)
Stt1906B Ma j Struve, O. 1906QB821.B972.....
Stt1906B cited in BDS (Burnham Double Star Cat., 1906)
Stt1908A Ma - Struve, O. 1908MNRAS..68..465B
Stt1908A cited by Barnard (MNRAS 68, 465, 1908)
Stt1913A Ma - Struve, O. 1913QB811.B8.......
Stt1913A cited by Burnham (Carnegie Inst. Wash. #168, 1913)
Stt1914A Ma - Struve, O. 1914AN....198..107R
Stt1914A cited by Rabe (AN 198, 107, 1914)
Stt1932A Ma - Struve, O. 1932QB821.A43......
Stt1932A cited in ADS (Aitken Double Star Cat., 1932)
 
 
WDS HISTORIC DATA
 
 
coord_2000 discov_num comp epoch obs pa sep mag_pri mag_sec spectr notes coord_arcsec_2000
21561+2420 STT 454 AB 2007 31 279 7.1 7.97 10.04 A0 D 215604.91+242023.6
21561+2420 STT 454 AB 2009 34 278 7.1 7.97 10.04 A0 D 215604.91+242023.6
21561+2420 STT 454 AB 2015 35 278 7.2 7.97 10.04 A0 215604.91+242023.6
21561+2420 STT 454 AB 2018 38 278 7.4 7.97 10.04 A0 215604.91+242023.6

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

 
 
WDS 21561+2420 STT 454 AB (HD 208503) : VISUAL OBSERVATIONS REPORTS
 
 
No records found.


 
 
WDS 21561+2420 STT 454 AB (HD 208503) : MEASURES
 
 
No records found.

 
 
WDS 21561+2420 (HD 208503) : VIRTUAL EYEPIECE
 
 

21561+2420 STT 454A mag 7.97 Sp A0 21561+2420 STT 454B sep 6.8 P.A. 278.80 mag 10.04 21561+2420 STT 454C sep 39.2 P.A. 263.50 mag 12.08 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 21561+2420 (HD 208503) : ALADIN DSS IMAGE @ 21h 56m 04.91s +24° 20' 23.6"
 
 
 
 
WDS 21561+2420 STT 454 AB (HD 208503) : NEIGHBORHOODS
 
 
FoV:
Limit:
Primaries only

21561+2420 STT 454AB distance=0' 21553+2424 POU5568AB distance=12' 21553+2424 POU5569AC distance=12' 21553+2424 POU5570AD distance=12' 21567+2412 POU5579 distance=13' 21551+2417 POU5563 distance=15' 21556+2406 POU5572 distance=16' 21549+2417 POU5562 distance=17' 21573+2408 POU5584 distance=22' 21545+2411 POU5559 distance=23' 21556+2356 POU5571 distance=26' 21543+2425 POU5557 distance=26' 21568+2357 POU5580 distance=26' 21561+2354 POU5575 distance=27' 21575+2402 LDS4927 distance=28' 21576+2440 POU5589 distance=29' 21542+2409 POU5556 distance=29' 21578+2437 POU5590 distance=30' 21574+2446 POU5586 distance=31' 21574+2354 POU5585 distance=32' 21559+2347 TDT3246 distance=34' 21583+2440 POU5592 distance=36' 21553+2454 POU5567 distance=36' 21564+2344 POU5578 distance=37' 21551+2345 POU5564 distance=38' 21588+2427 COU 839 distance=38' 21539+2446 POU5555 distance=40' 21590+2417 POU5595 distance=40' 21572+2457 POU5583 distance=40' 21535+2440 POU5551 distance=41' 21584+2447 POU5594 distance=42' 21574+2458 POU5587 distance=42' 21575+2457 POU5588 distance=42' 21533+2404 POU5548 distance=42' 21530+2412 POU5546 distance=44' 21548+2340 POU5561 distance=44' 21593+2424 POU5598 distance=45' 21556+2504 POU5573 distance=45' 21552+2503 POU5566 distance=45' 21564+2335 HJ 1708 distance=45' 21534+2447 POU5549 distance=47' 21527+2429 POU5541 distance=48' 21535+2347 POU5550 distance=49' 21596+2407 POU5600 distance=50' 21547+2334 POU5560 distance=51' 21571+2509 POU5582 distance=51' 21529+2354 POU5545 distance=51' 21594+2443 POU5599 distance=51' 21545+2506 POU5558 distance=51' 21590+2349 POU5596 distance=52' 21598+2435 POU5604 distance=53' 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 21561+2420 STT 454 AB 278 7.4
Show 21561+2420 STT 454 AC 264 43.0
Show 21553+2424 POU5568 AB 259 12.4 12
Show 21553+2424 POU5569 AC 116 4.4 12
Show 21553+2424 POU5570 AD 127 9.1 12
Show 21567+2412 POU5579 314 6.8 13
Show 21551+2417 POU5563 115 4.2 15
Show 21556+2406 POU5572 277 20.4 16
Show 21549+2417 POU5562 44 3.0 17
Show 21573+2408 POU5584 324 19.7 22
Show 21545+2411 POU5559 292 12.7 23
Show 21556+2356 POU5571 314 17.3 26
Show 21543+2425 POU5557 21 9.4 26
Show 21568+2357 POU5580 140 15.1 26
Show 21561+2354 POU5575 267 16.3 27
Show 21575+2402 LDS4927 10 31.4 28
Show 21576+2440 POU5589 24 13.3 29
Show 21542+2409 POU5556 183 1.7 29
Show 21578+2437 POU5590 137 10.3 30
Show 21574+2446 POU5586 339 3.7 31
Show 21574+2354 POU5585 75 5.1 32
Show 21559+2347 TDT3246 99 0.7 34
Show 21583+2440 POU5592 98 9.3 36
Show 21553+2454 POU5567 156 15.0 36
Show 21564+2344 POU5578 86 3.4 37
Show 21551+2345 POU5564 110 16.8 38
Show 21588+2427 COU 839 95 0.3 38
Show 21539+2446 POU5555 15.6 40
Show 21590+2417 POU5595 298 6.7 40
Show 21572+2457 POU5583 17 13.1 40
Show 21535+2440 POU5551 178 5.9 41
Show 21584+2447 POU5594 287 9.4 42
Show 21574+2458 POU5587 329 13.1 42
Show 21575+2457 POU5588 5 5.5 42
Show 21533+2404 POU5548 191 3.6 42
Show 21530+2412 POU5546 35 10.6 44
Show 21548+2340 POU5561 309 10.4 44
Show 21593+2424 POU5598 86 4.9 45
Show 21556+2504 POU5573 227 16.3 45
Show 21552+2503 POU5566 214 7.6 45
Show 21564+2335 HJ 1708 236 7.2 45
Show 21534+2447 POU5549 100 9.9 47
Show 21527+2429 POU5541 126 6.6 48
Show 21535+2347 POU5550 123 9.3 49
Show 21596+2407 POU5600 332 15.8 50
Show 21547+2334 POU5560 269 16.3 51
Show 21571+2509 POU5582 337 8.0 51
Show 21529+2354 POU5545 123 18.8 51
Show 21594+2443 POU5599 306 11.1 51
Show 21545+2506 POU5558 222 11.1 51
Show 21590+2349 POU5596 353 18.3 52

 
 
WDS 21561+2420 : COMPONENTS
 
 
  A B
B pa=278.8°
sep=6.78"
 
C pa=263.5°
sep=39.25"
pa=260.4°
sep=32.76"
 
 
21561+2420 A
 
 
Name HD 208503 Coord arcsec 2000 215604.91+242023.6 Mag 7.97 Spectral class A0 (white)
PmRA 12.00 PmDE -12.0 HIP 108270 Tycho2 2203-01481-1
HD 208503 ADS 15461 BD BD+23 4428
Tycho2
Tycho2 2203-01481-1 Pflag RAmdeg 329.02050149 DEmdeg 24.33986235
PmRA 13.0 PmDE -13.4 E RAmdeg 5 E DEmdeg 6
E pmRA 1.2 E pmDE 1.1 EpRAm 1991.52 EpDEm 1991.22
Num 8 Q RAmdeg 2.2 Q DEmdeg 1.0 Q pmRA 2.2
Q pmDE 1.0 BTmag 8.006 E BTmag 0.016 VTmag 7.972
E VTmag 0.012 Prox 72 TYC T HIP 108270
CCDM A RAdeg 329.02046889 DEdeg 24.33989361 EpRA 1990 1.73
EpDE 1990 1.58 E RAdeg 5.4 E DEdeg 5.8 Posflg
Corr -0.1
Hipparcos
Catalog H HIP 108270 Proxy H RAhms 21 56 04.91
DEdms +24 20 23.6 Vmag 7.85 VarFlag R Vmag H
RAdeg 329.02 DEdeg 24.3399 AstroRef A Plx 4.49
CCDM 21561+2420 N CCDM I Nsys 1 Ncomp 2
MultFlag C Source Qual A M HIP AB
Theta 278 Rho 7.211 HD 208503 BD BD+23 4428
CD CP Dm number +23 4428 VIred 0.05
SpType A0+... R SpType Coord arcsec 2000 215604.91+242023.6
Hipparcos 2
HIP 108270 Sn 15 So 3 Nc 2
RArad 5.7424904507 DErad 0.4248113183 Plx 3.68 PmRA 10.96
PmDE -13.02 E RArad 0.7 E DErad 0.65 E Plx 0.84
E pmRA 0.75 E pmDE 0.67 Hpmag 7.8866 E Hpmag 0.0016
SHp 0.011 VA 0 BV 0.097 E BV 0.017
VI 0.11
CCDM
Ccdm 21561+2420 RComp Comp A Note1
Note2 Discov num DRAs -1.03 DDEs 23.0
R dRAs 10 Year Theta Rho
Obs 3 Vmag 8.2 Sp A0 PmNote *
PmRA 9 PmDE -24 Dm number +23 4428 Cat1 BD
Name2 +24 2391 Cat2 AGK2/3 HD 208503 M HD
ADS BDS A15461 M ADS BDS N IDS IDS 21515N2352A
HIC 108270
 
 
21561+2420 B
 
 
Coord arcsec 2000 215604.42+242024.6 Mag 10.04 PmRA 7.00 PmDE -13.0
Calc delta mag 2.07 Calc coord yes
CCDM
Ccdm 21561+2420 RComp Comp B Note1
Note2 Discov num STT 454 DRAs -1.53 DDEs 24.0
R dRAs 10 Year 1850 Theta 278 Rho 7.2
Obs 13 Vmag 10.2 Sp PmNote *
PmRA 52 PmDE -18 Dm number Cat1
Name2 +24 2390 Cat2 AGK2/3 HD M HD
ADS BDS A15461 M ADS BDS N IDS IDS 21515N2352B
HIC 108270
 
 
21561+2420 C
 
 
Coord arcsec 2000 215602.06+242019.2 Mag 12.08 PmRA 8.00 PmDE -12.0
Calc delta mag 4.11 Calc coord yes
CCDM
Ccdm 21561+2420 RComp Comp C Note1
Note2 Discov num STT 454 DRAs DDEs
R dRAs Year 1895 Theta 265 Rho 43.2
Obs 3 Vmag 11.9 Sp PmNote
PmRA PmDE Dm number Cat1
Name2 Cat2 HD M HD
ADS BDS A15461 M ADS BDS N IDS IDS 21515N2352C
HIC