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Current system
20401+3044
TDT 2457 Aa,Ab
HD 334900


Nearby doubles
12' : 20410+3047
TDT2470

16' : 20396+3030
STF2711

17' : 20414+3049
TDS1091

22' : 20391+3103
J 1238

26' : 20419+3054
TDT2480

32' : 20408+3115
TDT2468

35' : 20382+3109
AG 261

37' : 20413+3012
ARY 28AB

38' : 20416+3117
TDT2474

39' : 20407+3007
TDT2467

42' : 20377+3112
BRT 283

46' : 20412+3001
COU1173

49' : 20416+3000
COU1174

50' : 20363+3044
TDT2411

54' : 20381+2958
A 743

57' : 20406+2948
HO 137AB

58' : 20381+2953
A 744

58' : 20403+2947
STF2714

59' : 20374+2958
HJ 1547

60' : 20439+3119
ES 366

60' : 20375+3134
STFA 53AB

61' : 20435+3127
TDT2499

62' : 20378+2951
TDT2435

62' : 20362+3010
TDT2408

63' : 20439+3005
TDS1097

63' : 20376+3138
COU1328



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Neglected List I
Neglected List II
Observed
Herschel, W.
Herschel, J.F.W.
Struve, Otto
Struve, F.G.W.

20401+3044 TDT 2457 Aa,Ab (HD 334900)

 
 
20h 40m 07.24s +30° 44' 28.2" P.A. 139.00 sep 0.9 mag 11.27,11.48 Sp A0
 
 
Coord 2000 20401+3044 Discov num TDT2457 Comp Aa,Ab Coord arcsec 2000 20 40 07.24 +30 44 28.2
Date first 1991 Date last 2016 Obs 3
Pa first 135 Pa last 138.5 P.A. Now (θ) 138.5°
Sep first 1.0 Sep last 0.888 Sep. Now (ρ) 0.888"
Mag pri 11.27 Mag sec 11.48 delta mag (ΔM) 0.21 Spectral class A0 (white)
Pri motion ra +002 Sec motion ra +002
Pri motion dec -005 Sec motion dec -005
Notes
Nature of this double is uncertain.
 
 
20401+3044 SYSTEM COMPONENTS
 
 
Show name SAO coord wds_name last obs pa sep mag1 mag2 d_mag orb current
Show HD 334900 20 40 07 +30 44 28 TDT 2457 Aa,Ab 2016 3 139 0.9 11.27 11.48 0.21 <===
Show 20 40 07 +30 44 28 ROE 15 AB 2014 8 249 7.6 11.27 13.30 2.03
Show 20 40 07 +30 44 28 ROE 15 AC 2014 9 257 30.4 11.27 11.54 0.27
Quadruple system
3 estimated visually detectable stars in this system
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Name HD 334900 Constellation Cygnus Tycho2 2686-00543-1 Gaia DR2 1862380287224808320
HD 334900
 
 
WDS 20401+3044 TDT 2457 Aa,Ab (HD 334900) : NOTES
 
 
No records found.

 
 
REFERENCES
 
 
refcode metd author reference
Roe1908 Ma - Roe, E.D. 1908AN....178..169R
Roe1908 AN 178, 169, 1908
Roe1909 Ma - Roe, E.D. 1909AN....181..285R
Roe1909 AN 181, 285, 1909
Roe1910a Ma - Roe, E.D. 1910AJ.....26...93R
Roe1910a AJ 26, 93, 1910
Roe1910b Ma j Roe, E.D. ...................
Roe1910b Journal Astronomique 1, no. 4, 25, 1910
Roe1910c Ma - Roe, E.D. 1910AN....183..197R
Roe1910c AN 183, 197, 1910
Roe1910d Ma j Roe, E.D. 1910PA.....18..354R
Roe1910d Popular Astronomy 18, 354, 1910
Roe1910e Ma j Roe, E.D. 1910PA.....18..554R
Roe1910e Popular Astronomy 18, 554, 1910
Roe1911a Ma - Roe, E.D. 1911AN....187...39R
Roe1911a AN 187, 39, 1911
Roe1911b Ma - Roe, E.D. 1911AN....188..373R
Roe1911b AN 188, 373, 1911
Roe1911c Ma - Roe, E.D. 1911AN....190..137R
Roe1911c AN 190, 137, 1911
Roe1911d Ma j Roe, E.D. 1911PA.....19..383R
Roe1911d Popular Astronomy 19, 383, 1911
Roe1914 Ma j Roe, E.D. 1914AN....199..169R
Roe1914 AN 199, 169, 1914
Roe1915 Ma - Roe, E.D. 1915AN....202..99R
Roe1915 AN 202, 99, 1915
Roe1917 Ma j Roe, E.D. 1917AN....204...21R
Roe1917 AN 204, 21, 1917
Roe1918 Ma - Roe, E.D. 1918AJ.....31..149R
Roe1918 AJ 31, 149, 1918
Roe1919a Ma j Roe, E.D. 1919AJ.....32....6R
Roe1919a AJ 32, 6, 1919
Roe1919b Ma j Roe, E.D. 1919AJ.....32...25R
Roe1919b AJ 32, 25, 1919
Roe1932A - Roe, E.D. 1932QB821.A43......
Roe1932A 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
20401+3044 TDT2457 Aa,Ab 1991 1 135 1.0 11.28 11.47 A0 204007.25+304428.0
20401+3044 TDT2457 Aa,Ab 2015 2 137 0.9 11.27 11.48 A0 204007.24+304428.2
20401+3044 TDT2457 Aa,Ab 2016 3 139 0.9 11.27 11.48 A0 204007.24+304428.2

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

 
 
WDS 20401+3044 TDT 2457 Aa,Ab (HD 334900) : VISUAL OBSERVATIONS REPORTS
 
 
No records found.


 
 
WDS 20401+3044 TDT 2457 Aa,Ab (HD 334900) : MEASURES
 
 
No records found.

 
 
WDS 20401+3044 (HD 334900) : VIRTUAL EYEPIECE
 
 

20401+3044 ROE 15A mag 11.27 Sp A0 20401+3044 TDT2457Ab sep 0.8 P.A. 142.80 mag 11.48 20401+3044 ROE 15B sep 6.6 P.A. 245.70 mag 13.3 20401+3044 ROE 15C sep 26.4 P.A. 254.40 mag 11.54 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 20401+3044 (HD 334900) : ALADIN DSS IMAGE @ 20h 40m 07.24s +30° 44' 28.2"
 
 
 
 
WDS 20401+3044 TDT 2457 Aa,Ab (HD 334900) : NEIGHBORHOODS
 
 
FoV:
Limit:
Primaries only

20401+3044 TDT2457Aa,Ab distance=1' 20401+3044 ROE 15AB distance=1' 20401+3044 ROE 15AC distance=1' 20410+3047 TDT2470 distance=12' 20396+3030 STF2711 distance=16' 20414+3049 TDS1091 distance=17' 20391+3103 J 1238 distance=22' 20419+3054 TDT2480 distance=26' 20408+3115 TDT2468 distance=32' 20382+3109 AG 261 distance=35' 20413+3012 ARY 28AB distance=37' 20413+3012 ARY 28AC distance=37' 20416+3117 TDT2474 distance=38' 20407+3007 TDT2467 distance=39' 20377+3112 BRT 283 distance=42' 20412+3001 COU1173 distance=46' 20416+3000 COU1174 distance=49' 20363+3044 TDT2411 distance=50' 20381+2958 A 743 distance=54' 20406+2948 HO 137AB distance=57' 20406+2948 GII 290Aa,Ab distance=57' 20375+3134 FYM 138BD distance=58' 20375+3134 FYM 138BE distance=58' 20375+3134 FYM 138BF distance=58' 20375+3134 FYM 138BG distance=58' 20381+2953 A 744 distance=58' 20403+2947 STF2714 distance=58' 20374+2958 HJ 1547 distance=59' 20439+3119 ES 366 distance=60' 20375+3134 STFA 53AB distance=60' 20375+3134 STFA 53AC distance=60' 20375+3134 FYM 138AH distance=60' 20435+3127 TDT2499 distance=61' 20378+2951 TDT2435 distance=62' 20362+3010 TDT2408 distance=62' 20439+3005 TDS1097 distance=63' 20376+3138 COU1328 distance=63' 20385+2945 COU1172 distance=64' 20371+2953 MLB 663 distance=65' 20368+2955 TDT2421 distance=65' 20448+3022 AG 410 distance=66' 20351+3031 COU1327 distance=67' 20371+3138 TDT2425 distance=67' 20378+2943 A 742BC distance=68' 20378+2943 A 742A,BC distance=68' 20368+2951 BTN 1 distance=69' 20399+3154 TDT2456 distance=70' 20437+3137 LDS2929 distance=71' 20422+2939 COU1175 distance=71' 20456+3043 STF2726 distance=72' 20361+2955 TDT2407 distance=72' 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 20401+3044 TDT2457 Aa,Ab 139 0.9 1
Show 20401+3044 ROE 15 AB 249 7.6 1
Show 20401+3044 ROE 15 AC 257 30.4 1
Show 20410+3047 TDT2470 181 2.5 12
Show 20396+3030 STF2711 223 2.4 16
Show 20414+3049 TDS1091 350 0.8 17
Show 20391+3103 J 1238 18 3.6 22
Show 20419+3054 TDT2480 147 0.6 26
Show 20408+3115 TDT2468 247 1.9 32
Show 20382+3109 AG 261 154 4.3 35
Show 20413+3012 ARY 28 AB 332 62.8 37
Show 20413+3012 ARY 28 AC 35 102.2 37
Show 20416+3117 TDT2474 224 1.7 38
Show 20407+3007 TDT2467 160 0.8 39
Show 20377+3112 BRT 283 266 4.3 42
Show 20412+3001 COU1173 46 1.1 46
Show 20416+3000 COU1174 32 0.3 49
Show 20363+3044 TDT2411 90 0.8 50
Show 20381+2958 A 743 309 1.2 54
Show 20406+2948 HO 137 AB 358 0.8 57
Show 20406+2948 GII 290 Aa,Ab 43 0.1 57
Show 20375+3134 FYM 138 BD 35 41.0 58
Show 20375+3134 FYM 138 BE 29 58.4 58
Show 20375+3134 FYM 138 BF 81 38.8 58
Show 20375+3134 FYM 138 BG 83 62.5 58
Show 20381+2953 A 744 272 0.7 58
Show 20403+2947 STF2714 338 6.8 58
Show 20374+2958 HJ 1547 8 17.0 59
Show 20439+3119 ES 366 128 4.4 60
Show 20375+3134 STFA 53 AB 177 182.7 60
Show 20375+3134 STFA 53 AC 71.3 60
Show 20375+3134 FYM 138 AH 89 111.0 60
Show 20435+3127 TDT2499 80 0.4 61
Show 20378+2951 TDT2435 143 2.3 62
Show 20362+3010 TDT2408 177 0.4 62
Show 20439+3005 TDS1097 357 0.9 63
Show 20376+3138 COU1328 35 2.8 63
Show 20385+2945 COU1172 100 0.3 64
Show 20371+2953 MLB 663 265 4.3 65
Show 20368+2955 TDT2421 159 0.4 65
Show 20448+3022 AG 410 187 19.0 66
Show 20351+3031 COU1327 8 2.7 67
Show 20371+3138 TDT2425 261 0.5 67
Show 20378+2943 A 742 BC 132 1.2 68
Show 20378+2943 A 742 A,BC 343 56.8 68
Show 20368+2951 BTN 1 1 13.8 69
Show 20399+3154 TDT2456 18 0.7 70
Show 20437+3137 LDS2929 219 2.5 71
Show 20422+2939 COU1175 138 3.5 71
Show 20456+3043 STF2726 74 5.8 72
Show 20361+2955 TDT2407 124 0.5 72

 
 
WDS 20401+3044 : COMPONENTS
 
 
  A Ab B
Ab pa=142.8°
sep=0.84"
 
B pa=245.7°
sep=6.64"
pa=252.5°
sep=6.88"
 
C pa=254.4°
sep=26.40"
pa=256.1°
sep=26.72"
pa=257.3°
sep=19.86"
 
 
20401+3044 A
 
 
Coord arcsec 2000 204007.24+304428.2 Mag 11.27 Spectral class A0 (white) PmRA 4.00
PmDE -6.0 Tycho2 2686-00543-1 HD 334900 ADS 14136
DM BD+30 4129
Tycho2
Tycho2 2686-00543-1 Pflag P RAmdeg 310.03024384 DEmdeg 30.74111168
PmRA 2.4 PmDE -5.0 E RAmdeg 29 E DEmdeg 24
E pmRA 2.7 E pmDE 2.6 EpRAm 1990.41 EpDEm 1990.90
Num 3 Q RAmdeg 0.7 Q DEmdeg 0.0 Q pmRA 0.7
Q pmDE 0.0 BTmag 11.330 E BTmag 0.039 VTmag 11.270
E VTmag 0.054 Prox 10 TYC T HIP
CCDM RAdeg 310.03016500 DEdeg 30.74118417 EpRA 1990 1.67
EpDE 1990 1.82 E RAdeg 28.7 E DEdeg 23.6 Posflg D
Corr 0.3
CCDM
Ccdm 20401+3044 RComp Comp A Note1
Note2 Discov num DRAs 1.12 DDEs 27.2
R dRAs 65 Year Theta Rho
Obs 3 Vmag 10.3 Sp PmNote
PmRA PmDE Dm number +30 4129 Cat1 BD
Name2 Cat2 HD M HD
ADS BDS A14136 M ADS BDS N IDS IDS 20360N3023A
HIC
 
 
20401+3044 Ab
 
 
Coord arcsec 2000 204007.28+304427.5 Mag 11.48 PmRA 2.00 PmDE -5.0
Calc delta mag 0.21 Calc coord yes
 
 
20401+3044 B
 
 
Coord arcsec 2000 204006.77+304425.5 Mag 13.3 PmRA -3.00 PmDE -13.0
Calc delta mag 2.03 Calc coord yes
CCDM
Ccdm 20401+3044 RComp Comp B Note1
Note2 Discov num ROE 15 DRAs DDEs
R dRAs Year 1909 Theta 251 Rho 5.5
Obs 1 Vmag 12.3 Sp PmNote
PmRA PmDE Dm number Cat1
Name2 Cat2 HD M HD
ADS BDS A14136 M ADS BDS N IDS IDS 20360N3023B
HIC
 
 
20401+3044 C
 
 
Coord arcsec 2000 204005.27+304421.1 Mag 11.54 PmRA -9.00 PmDE -17.0
Tycho2 2686-00543-2 Calc delta mag 0.27 Calc coord yes
Tycho2
Tycho2 2686-00543-2 Pflag P RAmdeg 310.03024384 DEmdeg 30.74111168
PmRA 2.4 PmDE -5.0 E RAmdeg 29 E DEmdeg 24
E pmRA 2.7 E pmDE 2.6 EpRAm 1990.41 EpDEm 1990.90
Num 3 Q RAmdeg 0.7 Q DEmdeg 0.0 Q pmRA 0.7
Q pmDE 0.0 BTmag 11.837 E BTmag 0.053 VTmag 11.482
E VTmag 0.065 Prox 10 TYC HIP
CCDM RAdeg 310.03039528 DEdeg 30.74098917 EpRA 1990 1.67
EpDE 1990 1.82 E RAdeg 40.9 E DEdeg 33.6 Posflg D
Corr 0.3
CCDM
Ccdm 20401+3044 RComp Comp C Note1
Note2 Discov num ROE 15 DRAs -1.01 DDEs 21.6
R dRAs 65 Year 1909 Theta 259 Rho 29.6
Obs 1 Vmag 11.5 Sp PmNote
PmRA PmDE Dm number Cat1
Name2 Cat2 HD M HD
ADS BDS A14136 M ADS BDS N IDS IDS 20360N3023C
HIC