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Doubles in session


Current system
21407+3056
GRV 490


Nearby doubles
14' : 21412+3043
J 3143

20' : 21422+3100
OSO 154AB

23' : 21389+3058
TDT3081

26' : 21409+3122
AG 275

33' : 21384+3044
LDS4900

42' : 21396+3136
TDT3088

50' : 21395+3009
A 772

52' : 21429+3014
TDT3119

61' : 21378+3143
ES 2359

61' : 21431+3149
A 1222

62' : 21412+2955
GRV 491

64' : 21455+3113
TDT3141

64' : 21372+3142
TDT3064

64' : 21358+3101
HJ 939AB

65' : 21358+3104
HJ 940

65' : 21451+3026
TDT3136

65' : 21444+3140
HJ 1686

67' : 21383+2958
HJ 1670

68' : 21420+2951
MLB 720

70' : 21384+2953
MLB 491

70' : 21364+3015
MLB 719

71' : 21353+3043
TDT3047

72' : 21449+3145
ES 381

73' : 21430+2951
KPP 498

73' : 21360+3137
HO 163

79' : 21362+3003
BU 167



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.

21407+3056 GRV 490

 
 
21h 40m 42.88s +30° 56' 44.9" P.A. 328.00 sep 31.7 mag 11.34,12.07
 
 
Coord 2000 21407+3056 Discov num GRV 490 Comp Coord arcsec 2000 21 40 42.88 +30 56 44.9
Date first 1895 Date last 2015 Obs 12
Pa first 329 Pa last 328.1 P.A. Now (θ) 328.1°
Sep first 32.6 Sep last 31.7 Sep. Now (ρ) 31.7"
Mag pri 11.34 Mag sec 12.07 delta mag (ΔM) 0.73 Spectral class
Pri motion ra -015 Sec motion ra -016
Pri motion dec -022 Sec motion dec -027
Notes S (Parallax indidates non-physical)
rPM=0.162 (< 0.3, Physical double)
This double is not physical.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Constellation Cygnus Tycho2 2717-01252-1 Gaia DR2 1849782220424037376
 
 
WDS 21407+3056 GRV 490 : NOTES
 
 
No records found.

 
 
REFERENCES
 
 
refcode metd author reference
Grv2004 Eu - Greaves, J. 2004MNRAS.355..585G
Grv2004 MNRAS 355, 585, 2004
Grv2005a Es - Greaves, J. ...................
Grv2005a +C Webb Soc., Double Star Circ. 13, 2005 (GRV 973 - 1147)
Grv2005a (Note: RA for all WDS designations inadvertently truncated to integer minute)
Grv2005b Pa - Greaves, J. ...................
Grv2005b private communication
Grv2005c C - Greaves, J. 2005JDSO....1...41G
Grv2005c JDSO 1, 41, 2005
Grv2006 - Greaves, J. ...................
Grv2006 private communication, 2006
Grv2006 (measures done using LSPM-north, see Vizier On-line Data Catalog I/298;
Grv2006 Lepine & Shara 2005)
Grv2006b Es - Greaves, J. ...................
Grv2006b private Communication, 2006
Grv2006b (Reduction of SDSS data. Calculated position is to J2000, but actual observation
Grv2006b epoch is unknown and proper motion may or may not have been applied.)
Grv2006c Ey - Greaves, J. ...................
Grv2006c private Communication, 2006
Grv2006c (Reduction of SPM3.3 data. Calculated position is to 1991.25, but actual
Grv2006c observation epoch is unknown and proper motion may or may not have been applied.)
Grv2008 Es - Greaves, J. ...................
Grv2008 Webb Soc., Double Star Circ. 16, 2008
Grv2011 C - Greaves, J. ...................
Grv2011 Webb Soc., Double Star Circ. 19, 2011
Grv2011 These carry a discovery designation of SPM and come from the SPM4 Catalog 2011AJ....142...15G
Grv2019a Hg u Greaves, J. 2019JDSO...15...59G
Grv2019a JDSO 15, 59, 2019
Grv2019b Hg u Greaves, J. 2019JDSO...15...77G
Grv2019b JDSO 15, 59, 2019
Grv2019c Hg u Greaves, J. ...................
Grv2019c private communication, 2019 (17 April 2019 email)
Grv2019d Hg - Greaves, J. .
Grv2019d private communication, 2019 (4 Nov 2019 email)
Grv2020a not - Greaves, J. .
Grv2020a private communication, 2020 (14 Mar 2020 email)
Grv2020b Hg j Greaves, J. .
Grv2020b Webb Soc., Double Star Circ. 28, 23, 2020
Grv2020c Hg j Greaves, J. .
Grv2020c Webb Soc., Double Star Circ. 28, 35, 2020
Grv2020d Hg j Greaves, J. .
Grv2020d Webb Soc., Double Star Circ. 28, 39, 2020
Grv2020e Hg u Greaves, J. 2020JDSO...16..317G
Grv2020e JDSO 16, 317, 2020
Grv2020f Hg Greaves, J. 2020JDSO...16..362G
Grv2020f JDSO 16, 362, 2020
Grv2020g Hg - Greaves, J. .
Grv2020g private communication, 2020 (29 Nov 2020 email)
Grv2020h Hg - Greaves, J. .
Grv2020h private communication, 2020 (10 Dec 2020 email)
Grv2020i Hg - Greaves, J. .
Grv2020i private communication, 2020 (12 Dec 2020 email)
Grv2020j Hg - Greaves, J. .
Grv2020j private communication, 2020 (21 Dec 2020 email)
Grv2021a not - Greaves, J. .
Grv2021a private communication, 2021 (18 Feb 2021 email)
Grv2021b not - Greaves, J. .
Grv2021b private communication, 2021 (23 Feb 2021 email)
Grv2021c Hg+ - Greaves, J., Rica Romero, F.M. & Otero, S. 2021JDSO...17..137G
Grv2021c +orb JDSO 17, 137, 2021
Grv2021d Hg - Greaves, J. .
Grv2021d private communication, 2021 (23 Aug 2021 email)
Grv2021e Hg - Greaves, J. .
Grv2021e private communication, 2021 (24 Aug 2021 email)
Grv2022 Hg j Greaves, J. .
Grv2022 Webb Soc., Double Star Circ. 30, 27, 2022
Grv2023a Hg - Greaves, J. .
Grv2023a private communication, 2023 (15 Feb 2023 email)
 
 
WDS HISTORIC DATA
 
 
coord_2000 discov_num comp epoch obs pa sep mag_pri mag_sec spectr notes coord_arcsec_2000
21407+3056 GRV 490 2000 6 328 31.7 11.34 12.15 D 214042.88+305644.9
21407+3056 GRV 490 2002 7 328 31.7 11.34 12.15 D 214042.88+305644.9
21407+3056 GRV 490 2015 7 328 31.7 11.34 12.07 214042.88+305644.9

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

 
 
WDS 21407+3056 GRV 490 : VISUAL OBSERVATIONS REPORTS
 
 
No records found.


 
 
WDS 21407+3056 GRV 490 : MEASURES
 
 
No records found.

 
 
WDS 21407+3056 : VIRTUAL EYEPIECE
 
 

21407+3056 GRV 490A mag 11.34 21407+3056 GRV 490B sep 30.5 P.A. 331.90 mag 12.07 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 21407+3056 : ALADIN DSS IMAGE @ 21h 40m 42.88s +30° 56' 44.9"
 
 
 
 
WDS 21407+3056 GRV 490 : NEIGHBORHOODS
 
 
FoV:
Limit:
Primaries only

21407+3056 GRV 490 distance=0' 21412+3043 J 3143 distance=14' 21422+3100 OSO 154AB distance=20' 21422+3100 OSO 154AC distance=20' 21422+3100 OSO 154AD distance=20' 21422+3100 OSO 154AE distance=20' 21389+3058 TDT3081 distance=23' 21409+3122 AG 275 distance=26' 21384+3044 LDS4900 distance=33' 21396+3136 TDT3088 distance=42' 21395+3009 A 772 distance=50' 21429+3014 TDT3119 distance=52' 21422+3008 MLB 575AC distance=52' 21422+3008 MLB 575BC distance=52' 21378+3143 ES 2359 distance=61' 21431+3149 A 1222 distance=61' 21412+2955 GRV 491 distance=62' 21455+3113 TDT3141 distance=64' 21372+3142 TDT3064 distance=64' 21358+3101 HJ 939AB distance=64' 21358+3101 STF2808AC distance=64' 21358+3104 HJ 940 distance=65' 21451+3026 TDT3136 distance=65' 21444+3140 HJ 1686 distance=65' 21358+3101 HJ 939CD distance=65' 21383+2958 HJ 1670 distance=67' 21420+2951 MLB 720 distance=68' 21384+2953 MLB 491 distance=70' 21364+3015 MLB 719 distance=70' 21353+3043 TDT3047 distance=71' 21449+3145 ES 381 distance=72' 21430+2951 KPP 498 distance=73' 21360+3137 HO 163 distance=73' 21362+3003 BU 167 distance=79' 21353+3020 MLB 718 distance=80' 21441+3203 J 2355 distance=81' 21355+3012 UC 4502 distance=81' 21441+3205 DAM 235BC distance=83' 21441+3205 J 2354AB distance=83' 21457+3152 J 2356 distance=84' 21385+3217 ES 2319 distance=86' 21348+3016 ES 380CD distance=86' 21348+3016 ES 380AB distance=87' 21348+3016 ES 380AC distance=87' 21442+2942 MLB 493 distance=88' 21457+2957 TDT3145 distance=88' 21401+2928 BRT 57 distance=89' 21458+2954 TDT3146 distance=92' 21455+2948 DAM 237 distance=92' 21479+3117 HJ 1688 distance=95' 21334+3058 COU 732Aa,Ab distance=95' 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 21407+3056 GRV 490 328 31.7
Show 21412+3043 J 3143 262 6.6 14
Show 21422+3100 OSO 154 AB 25 15.3 20
Show 21422+3100 OSO 154 AC 239 15.8 20
Show 21422+3100 OSO 154 AD 166 16.4 20
Show 21422+3100 OSO 154 AE 108 19.6 20
Show 21389+3058 TDT3081 114 0.8 23
Show 21409+3122 AG 275 13 10.9 26
Show 21384+3044 LDS4900 213 17.4 33
Show 21396+3136 TDT3088 149 2.9 42
Show 21395+3009 A 772 112 0.1 50
Show 21429+3014 TDT3119 157 2.7 52
Show 21422+3008 MLB 575 AC 133 17.4 52
Show 21422+3008 MLB 575 BC 108 2.7 52
Show 21378+3143 ES 2359 83 2.7 61
Show 21431+3149 A 1222 352 0.7 61
Show 21412+2955 GRV 491 21 31.4 62
Show 21455+3113 TDT3141 358 2.5 64
Show 21372+3142 TDT3064 90 0.8 64
Show 21358+3101 HJ 939 AB 176 15.6 64
Show 21358+3101 STF2808 AC 286 42.8 64
Show 21358+3104 HJ 940 329 21.0 65
Show 21451+3026 TDT3136 0.8 65
Show 21444+3140 HJ 1686 229 13.7 65
Show 21358+3101 HJ 939 CD 344 15.1 65
Show 21383+2958 HJ 1670 78 11.7 67
Show 21420+2951 MLB 720 140 7.2 68
Show 21384+2953 MLB 491 34 4.8 70
Show 21364+3015 MLB 719 136 6.0 70
Show 21353+3043 TDT3047 19 2.4 71
Show 21449+3145 ES 381 110 4.6 72
Show 21430+2951 KPP 498 58 3.9 73
Show 21360+3137 HO 163 19 9.0 73
Show 21362+3003 BU 167 89 1.7 79
Show 21353+3020 MLB 718 307 8.1 80
Show 21441+3203 J 2355 346 3.5 81
Show 21355+3012 UC 4502 264 46.1 81
Show 21441+3205 DAM 235 BC 206 6.5 83
Show 21441+3205 J 2354 AB 199 4.9 83
Show 21457+3152 J 2356 135 6.3 84
Show 21385+3217 ES 2319 58 2.9 86
Show 21348+3016 ES 380 CD 312 2.9 86
Show 21348+3016 ES 380 AB 49 16.2 87
Show 21348+3016 ES 380 AC 106 61.5 87
Show 21442+2942 MLB 493 330 8.6 88
Show 21457+2957 TDT3145 250 2.2 88
Show 21401+2928 BRT 57 137 5.0 89
Show 21458+2954 TDT3146 359 2.5 92
Show 21455+2948 DAM 237 233 6.3 92
Show 21479+3117 HJ 1688 351 16.4 95
Show 21334+3058 COU 732 Aa,Ab 265 0.5 95

 
 
WDS 21407+3056 : COMPONENTS
 
 
  A
B pa=331.9°
sep=30.51"
 
 
21407+3056 A
 
 
Componente originario normalizzato AB Coord arcsec 2000 214042.88+305644.9 Mag 11.34 PmRA -15.00
PmDE -22.0 Tycho2 2717-01252-1
Tycho2
Tycho2 2717-01252-1 Pflag RAmdeg 325.17867709 DEmdeg 30.94581480
PmRA -15.7 PmDE -20.0 E RAmdeg 42 E DEmdeg 42
E pmRA 2.0 E pmDE 1.9 EpRAm 1986.39 EpDEm 1986.27
Num 4 Q RAmdeg 1.4 Q DEmdeg 1.1 Q pmRA 1.4
Q pmDE 1.1 BTmag 11.885 E BTmag 0.070 VTmag 11.340
E VTmag 0.068 Prox 317 TYC T HIP
CCDM RAdeg 325.17872000 DEdeg 30.94586111 EpRA 1990 1.59
EpDE 1990 1.67 E RAdeg 42.5 E DEdeg 43.1 Posflg
Corr 0.2
 
 
21407+3056 B
 
 
Componente originario normalizzato AB Coord arcsec 2000 214041.76+305711.8 Mag 12.07 PmRA -16.00
PmDE -27.0 Tycho2 2717-00908-1 Calc delta mag 0.73 Calc coord yes
Tycho2
Tycho2 2717-00908-1 Pflag RAmdeg 325.17328281 DEmdeg 30.95330235
PmRA -16.9 PmDE -26.8 E RAmdeg 71 E DEmdeg 71
E pmRA 2.3 E pmDE 2.2 EpRAm 1978.91 EpDEm 1978.23
Num 4 Q RAmdeg 1.7 Q DEmdeg 1.1 Q pmRA 1.7
Q pmDE 1.0 BTmag 13.129 E BTmag 0.235 VTmag 12.152
E VTmag 0.145 Prox 317 TYC HIP
CCDM RAdeg 325.17332889 DEdeg 30.95336444 EpRA 1990 1.58
EpDE 1990 1.66 E RAdeg 77.3 E DEdeg 77.0 Posflg
Corr 0.2