stampa
Login

Filter only those doubles you can observe? Yes, you can!
Register here


Search



Actions
Advanced Search
Go to Simbad
New report
New measure
Login


Computed Lists
Populars
Latest Populars
Doubles in session


Current system
21304+3504
HLD 45
HD 204842


Nearby doubles
16' : 21299+3519
TDT2996

19' : 21308+3446
COU1479

25' : 21320+3448
COU1480

26' : 21308+3440
SEI1522

28' : 21295+3438
TDT2993

30' : 21284+3447
COU1638

35' : 21316+3535
TDS1132

39' : 21279+3439
TDT2980

46' : 21300+3549
TDT2998

51' : 21339+3530
TDT3033

52' : 21328+3546
SEI1524

53' : 21267+3438
SEI1515

53' : 21261+3457
TDT2962

53' : 21272+3428
TDT2975

56' : 21321+3412
HO 603AB

57' : 21349+3505
GRV 478

58' : 21261+3529
POP 49

59' : 21334+3419
TDT3029

61' : 21302+3404
HJ 1652

64' : 21254+3446
TDS1128

67' : 21356+3446
COU1481

68' : 21267+3413
ES 2261

69' : 21352+3431
TDT3044

70' : 21326+3401
KPP1585

70' : 21257+3422
GRV 465

70' : 21291+3357
ES 2263



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.

21304+3504 HLD 45 (HD 204842)

 
 
21h 30m 21.53s +35° 03' 40.1" P.A. 198.00 sep 1.3 mag 9.30,9.73 Sp A0 dist. 8333.33 pc (27183.32 l.y.)
 
 
Coord 2000 21304+3504 Discov num HLD  45 Comp Coord arcsec 2000 21 30 21.53 +35 03 40.1
Date first 1881 Date last 2016 Obs 36
Pa first 198 Pa last 198.4 P.A. Now (θ) 198.4°
Sep first 1.3 Sep last 1.302 Sep. Now (ρ) 1.302"
Mag pri 9.30 Mag sec 9.73 delta mag (ΔM) 0.43 Spectral class A0 (white)
Pri motion ra +005 Sec motion ra +005
Pri motion dec +005 Sec motion dec +005
Notes
Nature of this double is uncertain.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Name HD 204842 Constellation Cygnus SAO 71407 HIP 106174
Tycho2 2712-00574-1 Gaia DR2 1951236146892530560 HD 204842 BD BD+34 4437
Distance 8333.33 Distance ly 27183.32
 
 
WDS 21304+3504 HLD 45 (HD 204842) : NOTES
 
 
No records found.

 
 
REFERENCES
 
 
refcode metd author reference
Hld1874 Ma - Holden, E.S. .
Hld1874 Washington Observations, 1874
Hld1875 Ma - Holden, E.S. .
Hld1875 Washington Observations, 1875
Hld1875b Ma j Holden, E.S. & Newcomb, S. 1875AN.....86..321H
Hld1875b AN 86, 321, 1875
Hld1875c Ma j Holden, E.S. 1875AN.....86..321H
Hld1875c AN 86, 321, 1875
Hld1876 Ma - Holden, E.S. .
Hld1876 Washington Observations, 1876
Hld1876b Ma j Holden, E.S. 1876AN.....88..131H
Hld1876b AN 88, 131, 1876
Hld1877 Ma - Holden, E.S. 1877AN.....90..161H
Hld1877 AN 90, 161, 1877
Hld1877b Ma j Holden, E.S. 1877AN.....90..161H
Hld1877b AN 90, 161, 1877
Hld1878 Ma - Holden, E.S. .
Hld1878 Washington Observations, 1878
Hld1878b Ma j Holden, E.S. 1878AN.....93...65H
Hld1878b AN 93, 65, 1878 (data also in Hld1878)
Hld1879 Ma - Holden, E.S. .
Hld1879 Washington Observations, 1879
Hld1879b Ma j Holden, E.S. 1879AN.....95..329H
Hld1879b AN 95, 329, 1879 (data also in Hld1879)
Hld1880 Ma - Holden, E.S. .
Hld1880 Washington Observations, 1880
Hld1880b Ma j Holden, E.S. 1880AN.....97..319H
Hld1880b AN 97, 319, 1880 (data also in Hld1880)
Hld1881 Ma - Holden, E.S. .
Hld1881 Washington Observations, 1881
Hld1881b Ma j Holden, E.S. 1881MNRAS..41..416.
Hld1881b MNRAS 41, 416, 1881
Hld1882 Ma - Holden, E.S. 1882PWasO...1...77H
Hld1882 Pub. Washburn Obs. 1, 77, 1882 (see Pub. Lick Obs. 2, 1894) 1894PLicO...2.....B
Hld1884 Ma - Holden, E.S. 1884PWasO...2...97H
Hld1884 Pub. Washburn Obs. 2, 97, 1884
 
 
WDS HISTORIC DATA
 
 
coord_2000 discov_num comp epoch obs pa sep mag_pri mag_sec spectr notes coord_arcsec_2000
21304+3504 HLD 45 2001 31 198 1.3 9.30 9.73 A0 D 213021.53+350340.1
21304+3504 HLD 45 2009 34 198 1.2 9.30 9.73 A0 D 213021.53+350340.1
21304+3504 HLD 45 2016 34 198 1.3 9.30 9.73 A0 213021.53+350340.1

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

 
 
WDS 21304+3504 HLD 45 (HD 204842) : VISUAL OBSERVATIONS REPORTS
 
 
No records found.


 
 
WDS 21304+3504 HLD 45 (HD 204842) : MEASURES
 
 
No records found.

 
 
WDS 21304+3504 (HD 204842) : VIRTUAL EYEPIECE
 
 

21304+3504 HLD 45A mag 9.3 Sp A0 21304+3504 HLD 45B sep 1.3 P.A. 195.20 mag 9.73 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 21304+3504 (HD 204842) : ALADIN DSS IMAGE @ 21h 30m 21.53s +35° 03' 40.1"
 
 
 
 
WDS 21304+3504 HLD 45 (HD 204842) : NEIGHBORHOODS
 
 
FoV:
Limit:
Primaries only

21304+3504 HLD 45 distance=0' 21299+3519 TDT2996 distance=16' 21308+3446 COU1479 distance=19' 21320+3448 COU1480 distance=25' 21308+3440 SEI1522 distance=26' 21295+3438 TDT2993 distance=28' 21284+3447 COU1638 distance=30' 21316+3535 TDS1132 distance=35' 21279+3439 TDT2980 distance=39' 21300+3549 TDT2998 distance=46' 21339+3530 TDT3033 distance=51' 21328+3546 SEI1524 distance=52' 21267+3438 SEI1515 distance=53' 21261+3457 TDT2962 distance=53' 21272+3428 TDT2975 distance=53' 21321+3412 HO 603BC distance=56' 21321+3412 HO 603AB distance=56' 21349+3505 GRV 478 distance=57' 21261+3529 POP 49 distance=58' 21334+3419 TDT3029 distance=59' 21302+3404 HJ 1652 distance=61' 21254+3446 TDS1128 distance=64' 21356+3446 COU1481 distance=67' 21267+3413 ES 2261 distance=68' 21352+3431 TDT3044 distance=69' 21326+3401 KPP1585 distance=70' 21257+3422 GRV 465 distance=70' 21291+3357 ES 2263 distance=70' 21282+3355 TDT2982 distance=74' 21271+3402 ES 2262 distance=74' 21340+3605 TDT3034 distance=76' 21353+3549 GRV 479 distance=76' 21318+3349 STF2802 distance=77' 21358+3423 GYL 62 distance=78' 21322+3349 HEI 882 distance=79' 21296+3625 ES 258AB distance=84' 21296+3625 ES 258BC distance=84' 21322+3341 ES 2383 distance=87' 21318+3338 KUI 124 distance=88' 21229+3459 TDT2934 distance=92' 21271+3627 SEI1517 distance=93' 21295+3635 ES 2128AB distance=94' 21295+3635 ES 2128AC distance=94' 21268+3337 ES 2382 distance=94' 21285+3636 ALI 443 distance=96' 21232+3543 ALI 218 distance=96' 21382+3514 SEI1528 distance=97' 21225+3509 POP 50 distance=97' 21244+3607 TDS1125 distance=97' 21294+3640 CRB 16 distance=98' 21262+3339 TDT2964 distance=100' 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 21304+3504 HLD 45 198 1.3
Show 21299+3519 TDT2996 122 1.3 16
Show 21308+3446 COU1479 143 0.7 19
Show 21320+3448 COU1480 204 1.7 25
Show 21308+3440 SEI1522 180 23.7 26
Show 21295+3438 TDT2993 246 0.5 28
Show 21284+3447 COU1638 226 1.3 30
Show 21316+3535 TDS1132 306 1.4 35
Show 21279+3439 TDT2980 235 2.3 39
Show 21300+3549 TDT2998 209 2.0 46
Show 21339+3530 TDT3033 150 0.6 51
Show 21328+3546 SEI1524 130 24.8 52
Show 21267+3438 SEI1515 43 10.6 53
Show 21261+3457 TDT2962 238 2.4 53
Show 21272+3428 TDT2975 259 2.1 53
Show 21321+3412 HO 603 BC 276 3.6 56
Show 21321+3412 HO 603 AB 251 80.6 56
Show 21349+3505 GRV 478 134 28.6 57
Show 21261+3529 POP 49 205 4.8 58
Show 21334+3419 TDT3029 133 2.3 59
Show 21302+3404 HJ 1652 26 15.4 61
Show 21254+3446 TDS1128 18 1.3 64
Show 21356+3446 COU1481 178 0.5 67
Show 21267+3413 ES 2261 155 4.1 68
Show 21352+3431 TDT3044 63 0.6 69
Show 21326+3401 KPP1585 342 12.0 70
Show 21257+3422 GRV 465 6 51.1 70
Show 21291+3357 ES 2263 28 2.8 70
Show 21282+3355 TDT2982 358 1.8 74
Show 21271+3402 ES 2262 74 1.3 74
Show 21340+3605 TDT3034 125 0.6 76
Show 21353+3549 GRV 479 117 52.1 76
Show 21318+3349 STF2802 9 3.9 77
Show 21358+3423 GYL 62 175 58.7 78
Show 21322+3349 HEI 882 182 2.0 79
Show 21296+3625 ES 258 AB 36 9.8 84
Show 21296+3625 ES 258 BC 10 19.7 84
Show 21322+3341 ES 2383 44 5.2 87
Show 21318+3338 KUI 124 143 4.2 88
Show 21229+3459 TDT2934 304 1.0 92
Show 21271+3627 SEI1517 80 16.3 93
Show 21295+3635 ES 2128 AB 304 7.2 94
Show 21295+3635 ES 2128 AC 101 24.9 94
Show 21268+3337 ES 2382 257 7.7 94
Show 21285+3636 ALI 443 298 4.3 96
Show 21232+3543 ALI 218 264 12.2 96
Show 21382+3514 SEI1528 64 22.0 97
Show 21225+3509 POP 50 29 7.1 97
Show 21244+3607 TDS1125 12 1.4 97
Show 21294+3640 CRB 16 56 111.6 98
Show 21262+3339 TDT2964 258 0.4 100

 
 
WDS 21304+3504 : COMPONENTS
 
 
  A
B pa=195.2°
sep=1.28"
 
 
21304+3504 A
 
 
Componente originario normalizzato AB Name HD 204842 Coord arcsec 2000 213021.53+350340.1 Mag 9.3
Spectral class A0 (white) PmRA 5.00 PmDE 5.0 SAO 71407
HIP 106174 Tycho2 2712-00574-1 HD 204842 BD BD+34 4437
Tycho2
Tycho2 2712-00574-1 Pflag P RAmdeg 322.58971537 DEmdeg 35.06113155
PmRA 4.5 PmDE 4.7 E RAmdeg 8 E DEmdeg 7
E pmRA 1.7 E pmDE 1.6 EpRAm 1991.11 EpDEm 1991.35
Num 7 Q RAmdeg 1.2 Q DEmdeg 0.9 Q pmRA 1.3
Q pmDE 0.9 BTmag 9.317 E BTmag 0.016 VTmag 9.303
E VTmag 0.015 Prox 13 TYC T HIP 106174
CCDM B RAdeg 322.58974944 DEdeg 35.06124139 EpRA 1990 1.44
EpDE 1990 1.62 E RAdeg 7.8 E DEdeg 6.7 Posflg D
Corr 0.1
SAO
SAO 71407 DelFlag RA1950 PmRA1950 -0.0002
DE1950 PmDE1950 -0.012 Vmag 8.4 SpType A0
Double code Source 6 CatNum 2189 DM BD+34 4437
DMcomp BDsup HD 204842 M HD 0
GC RA1950rad 5.62114349 DE1950rad 0.60808411 PmRA2000 0
PmDE2000 -0.015
Hipparcos
Catalog H HIP 106174 Proxy H RAhms 21 30 21.54
DEdms +35 03 40.5 Vmag 8.73 VarFlag R Vmag H
RAdeg 322.59 DEdeg 35.0612 AstroRef B Plx 1.57
CCDM 21304+3504 N CCDM I Nsys 1 Ncomp 2
MultFlag C Source Qual A M HIP BA
Theta 198 Rho 1.307 HD 204842 BD BD+34 4437
CD CP Dm number +34 4437 VIred 0.04
SpType A0 R SpType Coord arcsec 2000 213021.54+350340.5
Hipparcos 2
HIP 106174 Sn 15 So 3 Nc 2
RArad 5.6302532288 DErad 0.6119341071 Plx -0.12 PmRA 1.47
PmDE 0.73 E RArad 0.56 E DErad 0.66 E Plx 1.07
E pmRA 0.6 E pmDE 0.7 Hpmag 8.7717 E Hpmag 0.0015
SHp 0.017 VA 0 BV 0.106 E BV 0.033
VI 0.12
CCDM
Ccdm 21304+3504 RComp Comp A Note1
Note2 Discov num DRAs -2.52 DDEs -20.0
R dRAs 10 Year Theta Rho
Obs 2 Vmag 9.3 Sp A0 PmNote *
PmRA -6 PmDE 4 Dm number +34 4437 Cat1 BD
Name2 +34 2189 Cat2 AGK2/3 HD 204842 M HD
ADS BDS A15039 M ADS BDS N IDS IDS 21262N3437A
HIC 106174
 
 
21304+3504 B
 
 
Componente originario normalizzato AB Coord arcsec 2000 213021.50+350338.9 Mag 9.73 PmRA 5.00
PmDE 5.0 Tycho2 2712-00574-2 Calc delta mag 0.43 Calc coord yes
Tycho2
Tycho2 2712-00574-2 Pflag P RAmdeg 322.58971537 DEmdeg 35.06113155
PmRA 4.5 PmDE 4.7 E RAmdeg 8 E DEmdeg 7
E pmRA 1.7 E pmDE 1.6 EpRAm 1991.11 EpDEm 1991.35
Num 7 Q RAmdeg 1.2 Q DEmdeg 0.9 Q pmRA 1.3
Q pmDE 0.9 BTmag 9.712 E BTmag 0.018 VTmag 9.727
E VTmag 0.020 Prox 13 TYC T HIP 106174
CCDM A RAdeg 322.58961361 DEdeg 35.06089556 EpRA 1990 1.43
EpDE 1990 1.62 E RAdeg 10.5 E DEdeg 8.9 Posflg D
Corr 0.1
CCDM
Ccdm 21304+3504 RComp Comp B Note1
Note2 Discov num HLD 45 DRAs DDEs
R dRAs Year 1881 Theta 018 Rho 1.3
Obs 16 Vmag 9.3 Sp PmNote
PmRA PmDE Dm number Cat1
Name2 Cat2 HD M HD
ADS BDS A15039 M ADS BDS N IDS IDS 21262N3437B
HIC 106174