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Current system
20498+1321
HJ 1578


Nearby doubles
5' : 20496+1322
TDT2565

7' : 20503+1317
BPM2279

11' : 20497+1331
BPM2277

26' : 20499+1255
HJ 1577

33' : 20516+1340
TDT2583

37' : 20488+1248
GWP3000

38' : 20502+1246
J 3277

39' : 20492+1243
GWP3001

39' : 20523+1304
GRV 390

48' : 20471+1257
BPM2265

48' : 20496+1233
BU 1495AB

49' : 20524+1353
BPM2285

50' : 20487+1407
LIT 34

51' : 20481+1404
UC 4293

51' : 20466+1334
GWP2996

52' : 20467+1343
BPM2262

53' : 20528+1351
UC 4315AB

61' : 20486+1223
BPM2273

63' : 20541+1306
STF2734

65' : 20457+1302
WFC 258

67' : 20495+1426
BRT1955

70' : 20520+1422
BRT1956

71' : 20529+1415
GAI9015AB

72' : 20500+1432
CVR 874

73' : 20460+1235
KPP 477

74' : 20468+1420
BRT1347



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.

20498+1321 HJ 1578

 
 
20h 49m 53.07s +13° 20' 27.7" P.A. 311.00 sep 11.5 mag 9.84,12.01
 
 
Coord 2000 20498+1321 Discov num HJ 1578 Comp Coord arcsec 2000 20 49 53.07 +13 20 27.7
Date first 1828 Date last 2015 Obs 9
Pa first 308 Pa last 311.3 P.A. Now (θ) 311.3°
Sep first 8.0 Sep last 11.52 Sep. Now (ρ) 11.52"
Mag pri 9.84 Mag sec 12.01 delta mag (ΔM) 2.17 Spectral class
Pri motion ra +009 Sec motion ra -004
Pri motion dec -042 Sec motion dec -033
Notes
rPM=0.368
Nature of this double is uncertain.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Constellation Delphinus Tycho2 1102-00878-1 Gaia DR2 1761146430580021120
 
 
WDS 20498+1321 HJ 1578 : NOTES
 
 
No records found.

 
 
REFERENCES
 
 
refcode metd author reference
HJ_1826 Mb - Herschel, J.F.W. 1826MmRAS...2..459H
HJ_1826 MemRAS 2, 459, 1826
HJ_1829a Mb - Herschel, J.F.W. 1829MmRAS...3...47H
HJ_1829a MemRAS 3, 47, 1829
HJ_1829b Mb - Herschel, J.F.W. 1829MmRAS...3..177H
HJ_1829b MemRAS 3, 177, 1829
HJ_1831 Ma - Herschel, J.F.W. 1831MmRAS...4..331H
HJ_1831 +Mb MemRAS 4, part 2, 331, 1831
HJ_1833a Ma - Herschel, J.F.W. 1833MmRAS...5...13H
HJ_1833a +Mb MemRAS 5, 13, 1833
HJ_1833b orb - Herschel, J.F.W. 1833MmRAS...5..171H
HJ_1833b MemRAS 5, 171, 1833
HJ_1833c Mb - Herschel, J.F.W. 1833MmRAS...6....1H
HJ_1833c MemRAS 6, 1, 1833
HJ_1833d orb - Herschel, J.F.W. 1833MmRAS...6..149H
HJ_1833d MemRAS 6, 149, 1833
HJ_1835 Ma - Herschel, J.F.W. 1835MmRAS...8...37H
HJ_1835 +Mb MemRAS 8, 37, 1835
HJ_1836 Mb - Herschel, J.F.W. 1836MmRAS...9..193H
HJ_1836 MemRAS 9, 193, 1836
HJ_1847a Ma j Herschel, J.F.W. .
HJ_1847a +Mb Cape Results, London, 1847 (Cape of Good Hope Astronomical Observations 1834-1838)
HJ_1847b Ma j Herschel, J.F.W. .
HJ_1847b Cape Results, London, 1847
HJ_1850 orb - Herschel, J.F.W. 1850MmRAS..18...47H
HJ_1850 MemRAS 18, 47, 1850
HJ_1870 Mb - Herschel, J.F.W. 1870MmRAS..38....1H
HJ_1870 MemRAS 38, 1, 1870
HJ_1874A - Herschel, J.F.W. 1874MNRAS..35...28B
HJ_1874A cited by Burnham (MNRAS 35, 28, 1874)
HJ_1875A Ma - Herschel, J.F.W. 1875AN.....85..323D
HJ_1875A +Mb cited by Doberck, 1875 (see Dob1875b,f,g,h)
HJ_1880A Ma - Herschel, J.F.W. 1880Obs.....3..508G
HJ_1880A +Mb cited by Gledhill (Obs 3, 508, 1880)
HJ_1880B Mb - Herschel, J.F.W. 1880MNRAS..40..497B
HJ_1880B cited by Burnham (MNRAS 40, 497, 1880)
HJ_1897A Ma j Herschel, J.F.W. 1897MNRAS..57..541S
HJ_1897A cited by See (MNRAS 57, 541, 1897)
HJ_1905A Ma - Herschel, J.F.W. 1905LicOB...3..147A
HJ_1905A +Mb cited by Aitken (Lick Obs. Bull. 3, 147, 1905)
HJ_1906A Ma - Herschel, J.F.W. 1906MmRAS..56....1L
HJ_1906A +Mb cited by Lewis (MemRAS 56, 1, 1906)
HJ_1906B Ma - Herschel, J.F.W. 1906QB821.B972.....
HJ_1906B +Mb cited in BDS (Burnham Double Star Cat.), 1906
HJ_1927A Mb - Herschel, J.F.W. 1927sdsc.book......
HJ_1927A cited in SDS (Southern Double Star Catalog), 1927
HJ_1932A Mb - Herschel, J.F.W. 1932QB821.A43......
HJ_1932A cited in ADS (Aitken Double Star Cat.), 1932
HJ_9999 M j Herschel, J.F.W. ...................
HJ_9999 +Ma Unpublished, manuscript or reference not found.
 
 
WDS HISTORIC DATA
 
 
coord_2000 discov_num comp epoch obs pa sep mag_pri mag_sec spectr notes coord_arcsec_2000
20498+1321 HJ 1578 2000 2 311 11.4 9.84 12.01 204953.07+132027.7
20498+1321 HJ 1578 2001 4 311 11.5 9.84 12.01 D 204953.07+132027.7
20498+1321 HJ 1578 2010 5 311 11.2 9.84 12.01 204953.07+132027.7
20498+1321 HJ 1578 2015 6 311 11.5 9.84 12.01 204953.07+132027.7

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

 
 
WDS 20498+1321 HJ 1578 : VISUAL OBSERVATIONS REPORTS
 
 
No records found.


 
 
WDS 20498+1321 HJ 1578 : MEASURES
 
 
No records found.

 
 
WDS 20498+1321 : VIRTUAL EYEPIECE
 
 

20498+1321 HJ 1578A mag 9.84 20498+1321 HJ 1578B sep 11.3 P.A. 312.10 mag 12.01 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 20498+1321 : ALADIN DSS IMAGE @ 20h 49m 53.07s +13° 20' 27.7"
 
 
 
 
WDS 20498+1321 HJ 1578 : NEIGHBORHOODS
 
 
FoV:
Limit:
Primaries only

20498+1321 HJ 1578 distance=1' 20496+1322 TDT2565 distance=5' 20503+1317 BPM2279 distance=7' 20497+1331 BPM2277 distance=11' 20499+1255 HJ 1577 distance=26' 20516+1340 TDT2583 distance=33' 20488+1248 GWP3000 distance=37' 20502+1246 J 3277 distance=38' 20492+1243 GWP3001 distance=39' 20523+1304 GRV 390 distance=39' 20471+1257 BPM2265 distance=48' 20496+1233 BU 1495AB distance=48' 20496+1233 BU 1495AC distance=48' 20496+1233 BU 1495AD distance=48' 20524+1353 BPM2285 distance=49' 20487+1407 LIT 34 distance=50' 20481+1404 UC 4293 distance=51' 20466+1334 GWP2996 distance=51' 20467+1343 BPM2262 distance=52' 20528+1351 UC 4315AB distance=53' 20486+1223 BPM2273 distance=61' 20541+1306 STF2734 distance=63' 20457+1302 WFC 258 distance=65' 20495+1426 BRT1955 distance=67' 20520+1422 BRT1956 distance=70' 20529+1415 GAI9015AB distance=71' 20529+1415 GAI9015AC distance=71' 20500+1432 CVR 874 distance=72' 20460+1235 KPP 477 distance=73' 20468+1420 BRT1347 distance=74' 20458+1405 BPM2256 distance=75' 20541+1402 J 846 distance=75' 20515+1432 GRV 388 distance=77' 20550+1259 BPM2293 distance=78' 20477+1430 TDT2542 distance=78' 20446+1333 YSC 242AB distance=78' 20446+1312 TDS1098 distance=78' 20450+1244 BU 64AB distance=81' 20450+1244 STTA209AC distance=81' 20450+1244 BU 64AD distance=81' 20450+1244 D 32CD distance=81' 20548+1403 BPM2291 distance=84' 20519+1203 J 3245 distance=84' 20465+1429 BPM2260 distance=84' 20549+1236 BPM2292 distance=86' 20483+1444 LSC 93 distance=88' 20524+1200 GWP3008 distance=89' 20440+1256 DAM 218 distance=90' 20438+1330 BPM2238 distance=90' 20553+1236 BPM2295 distance=91' 20485+1450 BRT1349 distance=92' 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 20498+1321 HJ 1578 311 11.5 1
Show 20496+1322 TDT2565 136 1.4 5
Show 20503+1317 BPM2279 146 89.2 7
Show 20497+1331 BPM2277 190 94.4 11
Show 20499+1255 HJ 1577 245 9.4 26
Show 20516+1340 TDT2583 98 0.6 33
Show 20488+1248 GWP3000 280 24.1 37
Show 20502+1246 J 3277 326 4.1 38
Show 20492+1243 GWP3001 126 94.3 39
Show 20523+1304 GRV 390 107 42.6 39
Show 20471+1257 BPM2265 51 16.1 48
Show 20496+1233 BU 1495 AB 19 52.1 48
Show 20496+1233 BU 1495 AC 86 105.5 48
Show 20496+1233 BU 1495 AD 276 189.6 48
Show 20524+1353 BPM2285 88 101.7 49
Show 20487+1407 LIT 34 206 9.5 50
Show 20481+1404 UC 4293 5 14.4 51
Show 20466+1334 GWP2996 157 54.2 51
Show 20467+1343 BPM2262 331 74.6 52
Show 20528+1351 UC 4315 AB 157 14.6 53
Show 20486+1223 BPM2273 132 52.3 61
Show 20541+1306 STF2734 227 24.4 63
Show 20457+1302 WFC 258 284 11.7 65
Show 20495+1426 BRT1955 109 5.0 67
Show 20520+1422 BRT1956 197 6.4 70
Show 20529+1415 GAI9015 AB 277 1.3 71
Show 20529+1415 GAI9015 AC 167 51.8 71
Show 20500+1432 CVR 874 82 16.7 72
Show 20460+1235 KPP 477 52 4.5 73
Show 20468+1420 BRT1347 30 3.3 74
Show 20458+1405 BPM2256 194 73.0 75
Show 20541+1402 J 846 155 3.6 75
Show 20515+1432 GRV 388 239 51.4 77
Show 20550+1259 BPM2293 25 100.2 78
Show 20477+1430 TDT2542 76 0.5 78
Show 20446+1333 YSC 242 AB 157 1.5 78
Show 20446+1312 TDS1098 279 0.9 78
Show 20450+1244 BU 64 AB 174 0.7 81
Show 20450+1244 STTA209 AC 155 97.2 81
Show 20450+1244 BU 64 AD 117 64.3 81
Show 20450+1244 D 32 CD 15 60.8 81
Show 20548+1403 BPM2291 100 25.7 84
Show 20519+1203 J 3245 249 3.8 84
Show 20465+1429 BPM2260 89 86.7 84
Show 20549+1236 BPM2292 143 61.9 86
Show 20483+1444 LSC 93 142 0.2 88
Show 20524+1200 GWP3008 252 11.1 89
Show 20440+1256 DAM 218 342 5.7 90
Show 20438+1330 BPM2238 50 66.9 90
Show 20553+1236 BPM2295 182 40.1 91
Show 20485+1450 BRT1349 46 2.7 92

 
 
WDS 20498+1321 : COMPONENTS
 
 
  A
B pa=312.1°
sep=11.35"
 
 
20498+1321 A
 
 
Componente originario normalizzato AB Coord arcsec 2000 204953.07+132027.7 Mag 9.84 PmRA 9.00
PmDE -42.0 Tycho2 1102-00878-1 DM BD+12 4475
Tycho2
Tycho2 1102-00878-1 Pflag RAmdeg 312.47114579 DEmdeg 13.34103529
PmRA 9.0 PmDE -43.9 E RAmdeg 19 E DEmdeg 20
E pmRA 1.2 E pmDE 1.2 EpRAm 1987.28 EpDEm 1987.74
Num 5 Q RAmdeg 1.5 Q DEmdeg 0.6 Q pmRA 1.6
Q pmDE 0.5 BTmag 10.522 E BTmag 0.037 VTmag 9.838
E VTmag 0.030 Prox 996 TYC T HIP
CCDM RAdeg 312.47112917 DEdeg 13.34113528 EpRA 1990 1.74
EpDE 1990 1.73 E RAdeg 20.7 E DEdeg 21.3 Posflg
Corr -0.2
 
 
20498+1321 B
 
 
Componente originario normalizzato AB Coord arcsec 2000 204952.49+132035.3 Mag 12.01 PmRA -4.00
PmDE -33.0 Calc delta mag 2.17 Calc coord yes