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Doubles in session


Current system
20312+0513
AG 257
MR Del


Nearby doubles
18' : 20316+0530
A 395

26' : 20295+0514
UC 4199

30' : 20315+0444
BAL2966

30' : 20311+0444
UC 4205

30' : 20327+0453
J 2314AB

31' : 20331+0525
TDT2364

37' : 20335+0527
STF2696AB

51' : 20324+0426
A 2281

54' : 20348+0514
SCJ 26

54' : 20285+0443
J 3220

58' : 20340+0433
A 2282

69' : 20358+0508
BAL2968

73' : 20309+0626
DAE 10AB

74' : 20309+0400
BAL2538

74' : 20271+0551
HJ 2963

81' : 20346+0615
UC 4218

81' : 20352+0608
HWE 98

87' : 20367+0447
CBL 528

89' : 20370+0452
SMA 118

91' : 20253+0453
KPP4195AB

92' : 20286+0351
HJ 2967

94' : 20283+0351
BAL2533

97' : 20329+0647
UC 4213

98' : 20256+0604
UC 4177

98' : 20360+0411
J 2192

99' : 20264+0620
GWP2946



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.

20312+0513 AG 257 (MR Del)

 
 
20h 31m 13.51s +05° 13' 08.7" P.A. 75.00 sep 1.7 mag 9.49,9.77 Sp K0 dist. 48.54 pc (158.34 l.y.)
 
 
Coord 2000 20312+0513 Discov num AG  257 Comp Coord arcsec 2000 20 31 13.51 +05 13 08.7
Date first 1902 Date last 2016 Obs 46
Pa first 55 Pa last 75 P.A. Now (θ) 75°
Sep first 1.6 Sep last 1.687 Sep. Now (ρ) 1.687"
Mag pri 9.49 Mag sec 9.77 delta mag (ΔM) 0.28 Spectral class K0 (yellow-orange)
Pri motion ra +303 Sec motion ra +303
Pri motion dec +275 Sec motion dec +275
Notes N O (See Notes, Orbital solution)
This double is physical.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Var name MR Del Constellation Delphinus SAO 125889 HIP 101236
Tycho2 0518-01755-1 Gaia DR2 4245659976226458752 HD 195434 GC 28539
BD BD+04 4470 Distance 48.54 Distance ly 158.34
 
 
ORBITAL ELEMENTS
 
 
Period (P)676.2405y± 293.8216 Periastron (T)1836.3877y± 38.3978 Semi-major axis (a)2.50711a± 1.08477
Eccentricity (e)0.62797± 0.28087 Inclination (i)75.379°± 8.433 Longitude of periastron (ω)272.461°± 20.931
Node (Ω)46.399°± 9.075 Notesn ReferenceIzm2019
Equinox Last observation2015 Grade5(1=Definitive, 9=Indet.)
label theta rho
2000 70.7 1.746
2001 70.9 1.741
2002 71.1 1.736
2003 71.4 1.731
2004 71.6 1.725
2005 71.8 1.720
2006 72.0 1.715
2007 72.3 1.709
2008 72.5 1.704
2009 72.7 1.698
2010 72.9 1.693
2011 73.2 1.687
2012 73.4 1.682
2013 73.6 1.676
2014 73.9 1.671
2015 74.1 1.665
2016 74.3 1.660
2017 74.6 1.654
2018 74.8 1.648
2019 75.1 1.642
2020 75.3 1.637
2021 75.6 1.631
2022 75.8 1.625
2023 76.1 1.619
2024 76.3 1.613
2025 76.6 1.607
2026 76.8 1.602
2027 77.1 1.596
2028 77.3 1.590
2029 77.6 1.584
2030 77.9 1.578


 
 grafico orbita
Note: Theta is PA, Rho is Sep. For yearly orbits, data refer to Jan 1st.


 
  


wds20312%2B0513b.png orbit plot
Measures: green=micrometric, blue=interferometric, purple=photographic		  
 
 
WDS 20312+0513 AG 257 (MR Del) : NOTES
 
 
discov_num notes refcode
AG 257 Primary is eclipsing binary MR Del (period 0.52169 day). Zas2010
 
 
REFERENCES
 
 
refcode metd author reference
Izm2019 orb u Izmailov, I.S. 2019AstL...45...30I
Izm2019 Ast. Lett. 45, 30, 2019
Izm2019 (Orbital elements from weighted solutions used when available (Table 2),
Izm2019 unweighted elements (Table 1) used for remaining 29 systems.)
Zas2010 - Zasche, P. ...................
Zas2010 private communication, 2010
 
 
DISCOVERER
 
 
idgroup discov author
1 AG Astronomische Gesellschaft (see also ref codes KR and WFD)
 
 
WDS HISTORIC DATA
 
 
coord_2000 discov_num comp epoch obs pa sep mag_pri mag_sec spectr notes coord_arcsec_2000
20312+0513 AG 257 1999 36 70 1.7 9.49 9.77 K0 D 203113.51+051308.7
20312+0513 AG 257 2008 37 73 1.7 9.49 9.77 K0 D 203113.51+051308.7
20312+0513 AG 257 2009 44 73 1.7 9.49 9.77 K0 D 203113.51+051308.7
20312+0513 AG 257 2015 42 75 1.7 9.49 9.77 K0 NO 203113.51+051308.7
20312+0513 AG 257 2016 43 75 1.7 9.49 9.77 K0 NO 203113.51+051308.7

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

 
 
WDS 20312+0513 AG 257 (MR Del) : VISUAL OBSERVATIONS REPORTS
 
 
No records found.


 
 
WDS 20312+0513 AG 257 (MR Del) : MEASURES
 
 
No records found.

 
 
WDS 20312+0513 (MR Del) : VIRTUAL EYEPIECE
 
 

20312+0513 AG 257A mag 9.49 Sp K0 20312+0513 AG 257B sep 1.7 P.A. 74.90 mag 9.77 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 20312+0513 (MR Del) : ALADIN DSS IMAGE @ 20h 31m 13.51s +05° 13' 08.7"
 
 
 
 
WDS 20312+0513 AG 257 (MR Del) : NEIGHBORHOODS
 
 
FoV:
Limit:
Primaries only

20312+0513 AG 257 distance=0' 20316+0530 A 395 distance=18' 20295+0514 UC 4199 distance=26' 20315+0444 BAL2966 distance=30' 20311+0444 UC 4205 distance=30' 20327+0453 J 2314AB distance=30' 20327+0453 J 2314AC distance=30' 20331+0525 TDT2364 distance=31' 20335+0527 STF2696AB distance=37' 20335+0527 STF2696AC distance=37' 20324+0426 A 2281 distance=51' 20348+0514 SCJ 26 distance=54' 20285+0443 J 3220 distance=54' 20340+0433 A 2282 distance=58' 20358+0508 BAL2968 distance=69' 20309+0626 DAE 10AB distance=73' 20309+0626 WSP 2AC distance=73' 20309+0626 WSP 2AD distance=73' 20309+0626 WSP 2AE distance=73' 20309+0626 WSP 2AF distance=73' 20309+0400 BAL2538 distance=74' 20271+0551 HJ 2963 distance=74' 20346+0615 UC 4218 distance=81' 20352+0608 HWE 98 distance=81' 20367+0447 CBL 528 distance=87' 20370+0452 SMA 118 distance=89' 20253+0453 KPP4195AB distance=91' 20286+0351 HJ 2967 distance=92' 20283+0351 BAL2533 distance=94' 20329+0647 UC 4213 distance=97' 20256+0604 UC 4177 distance=98' 20360+0411 J 2192 distance=98' 20264+0620 GWP2946 distance=99' 20246+0531 BU 664AB distance=102' 20246+0531 FOX9034AC distance=102' 20300+0655 LDS4845 distance=104' 20327+0656 HDS2934 distance=105' 20382+0459 BAL2970 distance=106' 20321+0330 J 2573 distance=106' 20314+0701 J 3221 distance=107' 20294+0330 HJ 2970 distance=107' 20345+0653 BU 1208 distance=112' 20291+0325 HJ 2968 distance=113' 20388+0512 GWP2976 distance=113' 20238+0506 J 556 distance=113' 20302+0321 DOO 87 distance=113' 20234+0535 WHC 19 distance=119' 20253+0355 UC 4175 distance=119' 20233+0534 OPI 24 distance=120' 20290+0710 A 610 distance=121' 20307+0311 BAL2029 distance=122' 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 20312+0513 AG 257 75 1.7
Show 20316+0530 A 395 160 0.7 18
Show 20295+0514 UC 4199 240 54.1 26
Show 20315+0444 BAL2966 117 10.4 30
Show 20311+0444 UC 4205 254 48.5 30
Show 20327+0453 J 2314 AB 70 4.9 30
Show 20327+0453 J 2314 AC 138 19.0 30
Show 20331+0525 TDT2364 126 1.9 31
Show 20335+0527 STF2696 AB 298 0.5 37
Show 20335+0527 STF2696 AC 348 13.7 37
Show 20324+0426 A 2281 63 1.9 51
Show 20348+0514 SCJ 26 88 25.1 54
Show 20285+0443 J 3220 181 3.9 54
Show 20340+0433 A 2282 166 0.2 58
Show 20358+0508 BAL2968 10 13.9 69
Show 20309+0626 DAE 10 AB 103 0.7 73
Show 20309+0626 WSP 2 AC 114 11.6 73
Show 20309+0626 WSP 2 AD 183 13.6 73
Show 20309+0626 WSP 2 AE 16 18.5 73
Show 20309+0626 WSP 2 AF 176 19.8 73
Show 20309+0400 BAL2538 202 10.8 74
Show 20271+0551 HJ 2963 209 9.5 74
Show 20346+0615 UC 4218 315 75.8 81
Show 20352+0608 HWE 98 1 58.5 81
Show 20367+0447 CBL 528 234 20.5 87
Show 20370+0452 SMA 118 125 19.1 89
Show 20253+0453 KPP4195 AB 16 11.7 91
Show 20286+0351 HJ 2967 131 7.1 92
Show 20283+0351 BAL2533 256 19.0 94
Show 20329+0647 UC 4213 204 9.0 97
Show 20256+0604 UC 4177 278 14.3 98
Show 20360+0411 J 2192 18 4.8 98
Show 20264+0620 GWP2946 30 25.6 99
Show 20246+0531 BU 664 AB 287 9.0 102
Show 20246+0531 FOX9034 AC 89 35.6 102
Show 20300+0655 LDS4845 27 83.4 104
Show 20327+0656 HDS2934 75 1.2 105
Show 20382+0459 BAL2970 35 12.5 106
Show 20321+0330 J 2573 151 4.0 106
Show 20314+0701 J 3221 167 3.9 107
Show 20294+0330 HJ 2970 180 12.0 107
Show 20345+0653 BU 1208 332 3.1 112
Show 20291+0325 HJ 2968 50 15.3 113
Show 20388+0512 GWP2976 324 6.5 113
Show 20238+0506 J 556 187 2.9 113
Show 20302+0321 DOO 87 33 11.9 113
Show 20234+0535 WHC 19 178 2.0 119
Show 20253+0355 UC 4175 87 20.7 119
Show 20233+0534 OPI 24 351 9.2 120
Show 20290+0710 A 610 99 0.6 121
Show 20307+0311 BAL2029 141 7.5 122

 
 
WDS 20312+0513 : COMPONENTS
 
 
  A
B pa=74.9°
sep=1.68"
 
 
20312+0513 A
 
 
Componente originario normalizzato AB Var name MR Del Coord arcsec 2000 203113.51+051308.7 Mag 9.49
Spectral class K0 (yellow-orange) PmRA 303.00 PmDE 275.0 SAO 125889
HIP 101236 Tycho2 0518-01755-1 HD 195434 GC 28539
BD BD+04 4470
Tycho2
Tycho2 0518-01755-1 Pflag P RAmdeg 307.80627378 DEmdeg 5.21907648
PmRA 303.2 PmDE 275.3 E RAmdeg 16 E DEmdeg 21
E pmRA 2.0 E pmDE 1.9 EpRAm 1990.84 EpDEm 1989.88
Num 3 Q RAmdeg 0.4 Q DEmdeg 0.5 Q pmRA 0.3
Q pmDE 0.5 BTmag 10.410 E BTmag 0.038 VTmag 9.492
E VTmag 0.025 Prox 17 TYC T HIP 101236
CCDM A RAdeg 307.80539389 DEdeg 5.21834750 EpRA 1990 1.61
EpDE 1990 1.32 E RAdeg 16.4 E DEdeg 20.6 Posflg D
Corr -0.1
SAO
SAO 125889 DelFlag RA1950 PmRA1950 0.0219
DE1950 PmDE1950 0.276 Vmag 9.1 SpType K0
Double code Source 70 CatNum 28539 DM BD+04 4470
DMcomp BDsup HD 195434 M HD 0
GC 28539 RA1950rad 5.36132704 DE1950rad 0.08806418 PmRA2000 0.022
PmDE2000 0.274
Hipparcos
Catalog H HIP 101236 Proxy H RAhms 20 31 13.29
DEdms +05 13 06.1 Vmag 8.77 VarFlag 2 R Vmag H
RAdeg 307.805 DEdeg 5.21835 AstroRef A Plx 22.53
CCDM 20312+0513 N CCDM I Nsys 1 Ncomp 2
MultFlag C Source Qual B M HIP AB
Theta 69 Rho 1.802 HD 195434 BD BD+04 4470
CD CP Dm number +04 4470 VIred 0.76
SpType K0 R SpType Coord arcsec 2000 203113.29+051306.1
Hipparcos 2
HIP 101236 Sn 15 So 3 Nc 2
RArad 5.3722169245 DErad 0.0910773573 Plx 20.6 PmRA 304.7
PmDE 281.28 E RArad 2.23 E DErad 1.49 E Plx 2.47
E pmRA 3.34 E pmDE 1.96 Hpmag 8.9066 E Hpmag 0.0062
SHp 0.1 VA 1 BV 0.696 E BV 0.039
VI 0.75
CCDM
Ccdm 20312+0513 RComp Comp A Note1
Note2 Discov num DRAs 1.61 DDEs 10.2
R dRAs 10 Year Theta Rho
Obs 2 Vmag 9.8 Sp K0 PmNote *
PmRA 333 PmDE 302 Dm number +04 4470 Cat1 BD
Name2 +05 2981 Cat2 AGK2/3 HD 195434 M HD
ADS BDS A13940 M ADS BDS N IDS IDS 20262N0452A
HIC 101236
 
 
20312+0513 B
 
 
Componente originario normalizzato AB Coord arcsec 2000 203113.62+051309.1 Mag 9.77 PmRA 303.00
PmDE 275.0 HIP 101236 Tycho2 0518-01755-2 Calc delta mag 0.28
Calc coord yes
Tycho2
Tycho2 0518-01755-2 Pflag P RAmdeg 307.80627378 DEmdeg 5.21907648
PmRA 303.2 PmDE 275.3 E RAmdeg 16 E DEmdeg 21
E pmRA 2.0 E pmDE 1.9 EpRAm 1990.84 EpDEm 1989.88
Num 3 Q RAmdeg 0.4 Q DEmdeg 0.5 Q pmRA 0.3
Q pmDE 0.5 BTmag 10.721 E BTmag 0.048 VTmag 9.772
E VTmag 0.032 Prox 17 TYC T HIP 101236
CCDM B RAdeg 307.80584667 DEdeg 5.21852000 EpRA 1990 1.62
EpDE 1990 1.32 E RAdeg 21.3 E DEdeg 26.9 Posflg D
Corr -0.1
Hipparcos
Catalog H HIP 101236 Proxy H RAhms 20 31 13.29
DEdms +05 13 06.1 Vmag 8.77 VarFlag 2 R Vmag H
RAdeg 307.805 DEdeg 5.21835 AstroRef A Plx 22.53
CCDM 20312+0513 N CCDM I Nsys 1 Ncomp 2
MultFlag C Source Qual B M HIP AB
Theta 69 Rho 1.802 HD 195434 BD BD+04 4470
CD CP Dm number +04 4470 VIred 0.76
SpType K0 R SpType Coord arcsec 2000 203113.29+051306.1
Hipparcos 2
HIP 101236 Sn 15 So 3 Nc 2
RArad 5.3722169245 DErad 0.0910773573 Plx 20.6 PmRA 304.7
PmDE 281.28 E RArad 2.23 E DErad 1.49 E Plx 2.47
E pmRA 3.34 E pmDE 1.96 Hpmag 8.9066 E Hpmag 0.0062
SHp 0.1 VA 1 BV 0.696 E BV 0.039
VI 0.75
CCDM
Ccdm 20312+0513 RComp Comp B Note1
Note2 Discov num AG 257 DRAs DDEs
R dRAs Year 1957 Theta 064 Rho 2.0
Obs 14 Vmag 9.9 Sp PmNote
PmRA PmDE Dm number Cat1
Name2 Cat2 HD M HD
ADS BDS A13940 M ADS BDS N IDS IDS 20262N0452B
HIC 101236