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Current system
21004+3426
FAR 1


Nearby doubles
15' : 20593+3430
POP 28

16' : 21004+3411
BU 1329AB

17' : 20592+3435
POP 27

32' : 21024+3409
GYL 29

34' : 21007+3353
BUP 222AB

46' : 21000+3512
TDT2685

49' : 20584+3344
COU1635

52' : 20582+3510
COU1813

53' : 21030+3507
TDS1113

53' : 21025+3512
CRB 136

55' : 20593+3520
TDT2676

59' : 20568+3348
COU1812AB

59' : 20564+3353
TDT2647

60' : 21020+3331
TDT2705

65' : 21011+3324
GYL 45

65' : 21056+3421
TDS1114

66' : 21038+3338
ROE 52

66' : 21011+3532
SEI1366

67' : 21046+3345
CXT 1

67' : 20588+3530
SEI1342

67' : 21054+3447
GRV 414

69' : 21057+3407
TOB 210

73' : 20578+3321
TDT2661

73' : 21013+3315
CRC 75

73' : 21011+3315
LDS1049AB

73' : 21013+3314
CRC 39



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.

21004+3426 FAR 1

 
 
21h 00m 21.51s +34° 26' 21.0" P.A. 104.00 sep 46.4 mag 15.68,19.50 Sp DB5
 
 
Coord 2000 21004+3426 Discov num FAR   1 Comp Coord arcsec 2000 21 00 21.51 +34 26 21.0
Date first 1951 Date last 2016 Obs 14
Pa first 104 Pa last 104.4 P.A. Now (θ) 104.4°
Sep first 46.4 Sep last 46.445 Sep. Now (ρ) 46.445"
Mag pri 15.68 Mag sec 19.50 delta mag (ΔM) 3.82 Spectral class DB5 (white dwarf)
Pri motion ra +130 Sec motion ra
Pri motion dec +116 Sec motion dec
Notes N V (See Notes, Proper motion indicates physical)
This double is physical.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Constellation Cygnus Gaia DR2 1866605263732785792
 
 
WDS 21004+3426 FAR 1 : NOTES
 
 
discov_num notes refcode
FAR 1 SKF 321. Primary is DB white dwarf GD 392. Comparison of POSS I and II
plates indicate FAR 1 comprises a common proper motion pair
(pm 0.17+/-0.01 "/yr at 44+/-5 deg). Spectroscopy and multi-color
photometry indicate companion is a DC white dwarf. Assuming a log g
value for the primary of 8.0, distance is about 57.8 pc, masses ~0.59
and 0.153 Msun, and T_eff 11,625 and 3,509K. Far2004
Primary is white dwarf WD 2058+342 = GD 392. Far2005b
 
 
REFERENCES
 
 
refcode metd author reference
Far2004 Ci - Farihi, J. 2004ApJ...610.1013F
Far2004 +C ApJ 610, 1013, 2004
Far2005b C+ - Farihi, J., Becklin, E.E., & Zuckerman, B. 2005ApJS..161..394F
Far2005b +E2 ApJS 161, 394, 2005
 
 
DISCOVERER
 
 
discov author
FAR Farihi, J.
FAR Farihi, J., Bond, H.E., Dufour, P., Haghighipour, N., Schaefer, G.H.,
FAR Holberg, J.B., Barstow, M.A., & Burleigh, M.R.
 
 
WDS HISTORIC DATA
 
 
coord_2000 discov_num comp epoch obs pa sep mag_pri mag_sec spectr dm_number notes coord_arcsec_2000
21004+3426 FAR 1 2003 3 103 46.2 15.68 19.50 DB5 N DV 210021.51+342621.0
21004+3426 FAR 1 2010 7 104 46.4 15.68 19.50 DB5 NV 210021.51+342621.0
21004+3426 FAR 1 2015 8 104 45.4 15.68 19.50 DB5 NV 210021.51+342621.0
21004+3426 FAR 1 2016 14 104 46.4 15.68 19.50 DB5 NV 210021.51+342621.0

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

 
 
WDS 21004+3426 FAR 1 : VISUAL OBSERVATIONS REPORTS
 
 
No records found.


 
 
WDS 21004+3426 FAR 1 : MEASURES
 
 
No records found.

 
 
WDS 21004+3426 : VIRTUAL EYEPIECE
 
 

21004+3426 FAR 1A mag 15.68 Sp DB5 21004+3426 FAR 1B sep 46.5 P.A. 104.40 mag 19.5 virtual eyepiece
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Pass over with the mouse cursor to display the catalog designation.
Radius:
Components only
 
 
WDS 21004+3426 : ALADIN DSS IMAGE @ 21h 00m 21.51s +34° 26' 21.0"
 
 
 
 
WDS 21004+3426 FAR 1 : NEIGHBORHOODS
 
 
FoV:
Limit:
Primaries only

21004+3426 FAR 1 distance=0' 20593+3430 POP 28 distance=15' 21004+3411 BU 1329AB distance=16' 21004+3411 BU 1329AB,C distance=16' 20592+3435 POP 27 distance=17' 21024+3409 GYL 29 distance=32' 21007+3353 BUP 222AB distance=34' 21007+3353 BUP 222AC distance=34' 21007+3353 BUP 222AD distance=34' 21007+3353 BUP 222AE distance=34' 21007+3353 OSO 138AH distance=34' 21007+3353 OSO 138AI distance=34' 21007+3353 BUP 222AJ distance=34' 21007+3353 ACA 9AK distance=34' 21007+3353 ACA 9AL distance=34' 21007+3353 ACA 9AM distance=34' 21007+3353 FYM 196AN distance=34' 21007+3353 FYM 196AO distance=34' 21000+3512 TDT2685 distance=46' 20584+3344 COU1635 distance=49' 20582+3510 COU1813 distance=52' 21030+3507 TDS1113 distance=53' 21025+3512 CRB 136 distance=53' 20593+3520 TDT2676 distance=55' 20568+3348 COU1812AB distance=59' 20568+3348 DAM 220AB,C distance=59' 20564+3353 TDT2647 distance=59' 21020+3331 TDT2705 distance=60' 21011+3324 GYL 45 distance=65' 21056+3421 TDS1114 distance=65' 21038+3338 ROE 52 distance=66' 21011+3532 SEI1366 distance=66' 21046+3345 CXT 1 distance=67' 20588+3530 SEI1342 distance=67' 21054+3447 GRV 414 distance=67' 21057+3407 TOB 210 distance=69' 21050+3347 KPP2494BC distance=70' 20578+3321 TDT2661 distance=73' 21013+3315 CRC 75 distance=73' 21011+3315 LDS1049AB distance=73' 21011+3315 LDT 18AD distance=73' 21013+3314 CRC 39 distance=73' 21011+3315 JNN 288BC distance=73' 20592+3314 COU1637 distance=74' 21028+3534 SEI1375AB distance=74' 21028+3534 SEI1376AC distance=74' 21028+3534 BTG 6BC distance=74' 21028+3534 BTG 6BD distance=74' 20562+3335 ES 2312 distance=74' 20544+3435 SEI1304 distance=75' 20592+3541 TDT2674 distance=76' 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 21004+3426 FAR 1 104 46.4 0
Show 20593+3430 POP 28 5 2.9 15
Show 21004+3411 BU 1329 AB 39 0.3 16
Show 21004+3411 BU 1329 AB,C 30 6.8 16
Show 20592+3435 POP 27 157 1.5 17
Show 21024+3409 GYL 29 178 14.3 32
Show 21007+3353 BUP 222 AB 317 12.5 34
Show 21007+3353 BUP 222 AC 5 118.0 34
Show 21007+3353 BUP 222 AD 268 18.1 34
Show 21007+3353 BUP 222 AE 89 813.7 34
Show 21007+3353 OSO 138 AH 166 19.1 34
Show 21007+3353 OSO 138 AI 121 31.9 34
Show 21007+3353 BUP 222 AJ 271 944.5 34
Show 21007+3353 ACA 9 AK 50 59.5 34
Show 21007+3353 ACA 9 AL 311 69.2 34
Show 21007+3353 ACA 9 AM 200 80.8 34
Show 21007+3353 FYM 196 AN 93 23.6 34
Show 21007+3353 FYM 196 AO 346 10.4 34
Show 21000+3512 TDT2685 137 0.7 46
Show 20584+3344 COU1635 232 1.6 49
Show 20582+3510 COU1813 313 1.2 52
Show 21030+3507 TDS1113 9 2.1 53
Show 21025+3512 CRB 136 267 20.1 53
Show 20593+3520 TDT2676 23 0.8 55
Show 20568+3348 COU1812 AB 105 1.1 59
Show 20568+3348 DAM 220 AB,C 193 7.6 59
Show 20564+3353 TDT2647 196 0.9 59
Show 21020+3331 TDT2705 179 0.4 60
Show 21011+3324 GYL 45 205 10.1 65
Show 21056+3421 TDS1114 258 0.8 65
Show 21038+3338 ROE 52 79 6.5 66
Show 21011+3532 SEI1366 279 22.9 66
Show 21046+3345 CXT 1 178 7.7 67
Show 20588+3530 SEI1342 100 4.1 67
Show 21054+3447 GRV 414 170 67.7 67
Show 21057+3407 TOB 210 60 19.1 69
Show 21050+3347 KPP2494 BC 283 22.3 70
Show 20578+3321 TDT2661 208 0.6 73
Show 21013+3315 CRC 75 355 0.3 73
Show 21011+3315 LDS1049 AB 95 56.6 73
Show 21011+3315 LDT 18 AD 357 0.2 73
Show 21013+3314 CRC 39 63 10.1 73
Show 21011+3315 JNN 288 BC 34 0.1 73
Show 20592+3314 COU1637 359 0.1 74
Show 21028+3534 SEI1375 AB 339 6.5 74
Show 21028+3534 SEI1376 AC 270 11.1 74
Show 21028+3534 BTG 6 BC 235 10.6 74
Show 21028+3534 BTG 6 BD 274 15.9 74
Show 20562+3335 ES 2312 11 2.7 74
Show 20544+3435 SEI1304 68 21.0 75
Show 20592+3541 TDT2674 340 0.9 76

 
 
WDS 21004+3426 : COMPONENTS
 
 
  A
B pa=104.4°
sep=46.45"
 
 
21004+3426 A
 
 
Coord arcsec 2000 210021.51+342621.0 Mag 15.68 Spectral class DB5 (white dwarf) PmRA 130.00
PmDE 116.0
 
 
21004+3426 B
 
 
Coord arcsec 2000 210025.15+342609.4 Mag 19.5 Delta magnitude 3.82 Coordinate calculated yes