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Doubles in session


Current system
02157+2503
COU 79 AB
21 Ari


Nearby doubles
7' : 02154+2507
POU 165

11' : 02162+2455
POU 168

32' : 02159+2431
POU 166

34' : 02136+2521
GRV 116

38' : 02157+2426
HDO 57

40' : 02140+2431
POU 164

48' : 02127+2439
POU 163

51' : 02168+2415
POU 170

51' : 02194+2512
POU 173

52' : 02189+2529
POU 172

58' : 02197+2446
POU 174

64' : 02204+2456
POU 175

69' : 02165+2355
POU 169

74' : 02174+2353
STF 240

77' : 02105+2435
POU 161

79' : 02203+2415
J 1120

81' : 02123+2357
STF 226AB

82' : 02131+2616
LDS3358

84' : 02140+2342
HU 424

87' : 02112+2604
BRT3260AB

89' : 02092+2458
POU 160

91' : 02218+2425
POU 179

92' : 02222+2437
POU 180

99' : 02143+2326
AZC 22

100' : 02109+2348
HDS 292

100' : 02209+2353
POU 176



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.

02157+2503 COU 79 AB (21 Ari)

 
 
02h 15m 42.83s +25° 02' 35.7" P.A. 39.00 sep 0.2 mag 6.40,6.48 Sp F6V dist. 51.07 pc (166.59 l.y.)
 
 
Coord 2000 02157+2503 Discov num COU  79 Comp AB Coord arcsec 2000 02 15 42.83 +25 02 35.7
Date first 1965 Date last 2014 Obs 219
Pa first 50 Pa last 39.2 P.A. Now (θ) 39.2°
Sep first 0.3 Sep last 0.195 Sep. Now (ρ) 0.195"
Mag pri 6.40 Mag sec 6.48 delta mag (ΔM) 0.08 Spectral class F6V (yellow-white)
Pri motion ra -088 Sec motion ra
Pri motion dec -087 Sec motion dec
Notes N O W (See Notes, Orbital solution, )
This double is physical.
 
 
02157+2503 SYSTEM COMPONENTS
 
 
Show name SAO coord wds_name last obs pa sep mag1 mag2 d_mag orb current
Show 21 Ari 75238 02 15 43 +25 02 36 COU 79 AB 2014 219 39 0.2 6.40 6.48 0.08 Y <===
Show 02 15 49 +24 58 50 RAO 635 Ca,Cb 2019 1 150 0.7 12.20 13.90 1.70
Quadruple system
2 estimated visually detectable stars in this system
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Name 21 Ari Constellation Aries SAO 75238 HIP 10535
Tycho2 1769-01309-1 HD 13872 HR 657 GC 2706
BD BD+24 329 Flamsteed 21 Arietis Flamsteed name 21 Ari FK5 1059
Distance 51.07 Distance ly 166.59
 
 
SUSPECTED ORBITAL ELEMENTS
 
 
 
 
SUSPECTED ORBITAL ELEMENTS SOLUTION #1
 
 
Identifier02157+2503 COU 79 A
coord_arcsec_2000021542.83+250235.7
Period (P)925d (2.53y)± 90 Periastron (T)54092m (2006.976y)± 62 Semi-major axis (a)
Eccentricity (e)0 Inclination (i)71°± 45 Longitude of periastron (ω)0°
Node (Ω)211°± 55 Notesn ReferenceMut2010e
Equinox2000 Last observation2008 Grade9(1=Definitive, 9=Indet.)
Not enought orbital data to create a graph.
 
 
SUSPECTED ORBITAL ELEMENTS
 
 
 
 
SUSPECTED ORBITAL ELEMENTS SOLUTION #2
 
 
Identifier02157+2503 COU 79
coord_arcsec_2000021542.83+250235.7
Period (P)8622.7d (23.61y)± 4.4 Periastron (T)46497.2m (1986.182y)± 4.3 Semi-major axis (a)0.2347a± 0.0017
Eccentricity (e)0.68119± 0.00096 Inclination (i)104.437°± 0.025 Longitude of periastron (ω)263.927°± 0.031
Node (Ω)55.823°± 0.032 Notesn ReferenceMut2010e
Equinox2000 Last observation2008 Grade2(1=Definitive, 9=Indet.)
label theta rho
2000 317.9 0.097
2001 302.2 0.102
2002 288.6 0.111
2003 277.4 0.124
2004 268.4 0.137
2005 261.0 0.150
2006 254.5 0.158
2007 248.5 0.160
2008 242.1 0.146
2009 232.2 0.099
2010 95.9 0.029
2011 57.4 0.125
2012 50.5 0.170
2013 45.8 0.190
2014 41.7 0.195
2015 37.6 0.192
2016 33.3 0.183
2017 28.4 0.171
2018 22.7 0.157
2019 15.8 0.142
2020 7.3 0.127
2021 356.5 0.113
2022 343.2 0.103
2023 327.8 0.097
2024 311.6 0.098
2025 296.6 0.105
2026 283.9 0.116
2027 273.7 0.129
2028 265.3 0.142
2029 258.4 0.154
2030 252.2 0.160


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


 
  


wds02157%2B2503a.png orbit plot
Measures: green=micrometric, blue=interferometric, purple=photographic		  
 
 
WDS 02157+2503 COU 79 AB (21 Ari) : NOTES
 
 
discov_num notes refcode
COU 79 21 Ari. Couteau & Morel (1982) computed masses disagree with spectral Cou1982d
type. Authors suggest 3rd component (mass ~1 Msun) as possible
explanation. 1985.8375: This measure was erroneously attributed to
02130+0851 = MCA 5 by McAlister et al. (1987). The data were re-reduced McA1987b
by Hartkopf et al., giving similar results. The measure has now been Hrt1996a
replaced by the mean of the two separate reduction results.
1986.567: The separation of this partially resolved pair was
calculated under the assumption of zero or otherwise known magnitude
difference. Pair passed periastron earlier than predicted; now the
orbit is definitive Tok1985
Malkov et al. (2012) derive dynamical, photometric, and spectroscopic
masses of 3.09 +/- 0.30, 3.04, and 1.17 Msun, respectively. Mlk2012
 
 
REFERENCES
 
 
refcode metd author reference
Cou1982d orb - Couteau, P. & Morel, P.J. 1982A&A...105..323C
Cou1982d A&A 105, 323, 1982
Hrt1996a Sc j Hartkopf, W.I., Mason, B.D., & McAlister, H.A. 1996AJ....111..370H
Hrt1996a +orb AJ 111, 370, 1996
McA1987b Sc j McAlister, H.A., Hartkopf, W.I., Hutter, D.J., & Franz, O.G. 1987AJ.....93..688M
McA1987b AJ 93, 688, 1987
Mlk2012 not - Malkov, O.Yu., Tamazian, V.S., Docobo, J.A., & Chulkov, D.A. 2012A&A...546A..69M
Mlk2012 A&A 546, A69, 2012
Tok1985 Ig u Tokovinin, A.A. 1985A&AS...61..483T
Tok1985 A&AS 61, 483, 1985
 
 
DISCOVERER
 
 
idgroup discov author
1 RAO Robo AO (Palomar 60" AO project or KPNO 2.1m)
1 RAO Law, N.M., Morton, T., Baranec, C., Riddle, R., Ravichandran, G., Ziegler, C.,
1 RAO Johnson, J.A., Tendulkar, S.P., Bui, K., Burse, M.P., Das, H., Dekany, R., et al.
2 RAO Riddle, R.L., Tokovinin, A., Mason, B.D., Hartkopf, W.I., Roberts, L.C., Jr.,
2 RAO Baranec, C., Law, N.M., Bui, K., Burse, M.P., Das, H.K., Dekany, R.G.,
2 RAO Kulkarni, S., Punnadi, S., Ramaprakash, A.N., & Tendulkar, S.P.
7 RAO Baranec, C., Ziegler, C., Law, N.M., Morton, T., Riddle, R.L., Atkinson, D.,
7 RAO Schonhut, J., & Crepp, J.
8 RAO Ziegler, C., Law, N.M., Nicholas, M., Morton, T., Baranec, C., Riddle, R.L.,
8 RAO Atkinson, D., Baker, A., Roberts, S., & Ciardi, D.R.
9 RAO Schonhut-Stasik, J.S., Baranec, C., Huber, D., Ziegler, C., Atkinson, D., Gaidos,
9 RAO E., Law, N.M., Riddle, R., Hagelberg, J., van der Marel, N., & Hodapp, K.W.
10 RAO Hillenbrand, L.A., Zhang, C., Riddle, R.L., Baranec, C., Ziegler, C., Law, N.M. &
10 RAO Stauffer, J.
12 RAO Ziegler, C., Law, N.M., Baranec, C., Riddle, R., Duev, D.A., Howard, W.,
12 RAO Jensen-Clem, R., Kulkarni, S.R., Morton, T. & Salama, M.
13 RAO Ziegler, C., Law, N.M., Baranec, C., Morton, T., Riddle, R., De Lee, N., Huber, D.,
13 RAO Mahadevan, S. & Pepper, J.
14 RAO Bowler, B.P., Hinkley, S., Ziegler, C., Baranec, C., Gizis, J.E., Law, N.M., Liu,
14 RAO M.C., Shah, V.S., Shkolnik, E.L., Riaz, B. & Riddle, R.
15 RAO Schonhut-Stasik, J.S., Huber, D., Baranec, C., Lamman, C., Salama, M., Jensen-Clem,
15 RAO R., Duev, D.A., Riddle, R., Kulkarni, S.R. & Law, N.M.
16 RAO Lamman, C., Baranec, C., Berta-Thompson, Z.K., Law, N.M., Schonhut-Stasik, J.,
16 RAO Ziegler, C., Salama, M., Jensen-Clem, R., Duev, D.A., Riddle, R., Kulkarni, S.R.,
16 RAO Winters, J.G. & Irwin, J.M.
19 RAO Salama, M., Ou, J., Barance, C., Liu, M.C., Bowler, B.P., Barnes, P., Bonnet, M.,
19 RAO Chun, M., Duev, D.A., Goebel, S., Hall, D., Jacobson, S., Jensen-Clem, R., Law,
19 RAO N.M., Lockhart, C., Riddle, R., Situ, H., Warmbier, E. & Zhang, Z.
20 RAO Salama, M., Ziegler, C., Baranec, C., Liu, M.C., Law, N.M., Riddle, R., Henry,
20 RAO T.J., Winters, J.G., Jao, W.-C., Ou, J. & Ruiz, A.H.
 
 
WDS HISTORIC DATA
 
 
coord_2000 discov_num comp epoch obs pa sep mag_pri mag_sec spectr notes coord_arcsec_2000
02157+2503 COU 79 AB 2014 219 39 0.2 6.40 6.48 F6V NOW 021542.83+250235.7

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

 
 
WDS 02157+2503 COU 79 AB (21 Ari) : VISUAL OBSERVATIONS REPORTS
 
 
No records found.


 
 
WDS 02157+2503 COU 79 AB (21 Ari) : MEASURES
 
 
No records found.

 
 
WDS 02157+2503 (21 Ari) : VIRTUAL EYEPIECE
 
 

02157+2503 COU 79A mag 6.4 Sp F6V 02157+2503 COU 79B sep 0.2 P.A. 36.50 mag 6.48 02157+2503 RAO 635C sep 239.3 P.A. 160.50 mag 12.2 02157+2503 RAO 635Cb sep 240.0 P.A. 160.50 mag 13.9 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 02157+2503 (21 Ari) : ALADIN DSS IMAGE @ 02h 15m 42.83s +25° 02' 35.7"
 
 
 
 
WDS 02157+2503 COU 79 AB (21 Ari) : NEIGHBORHOODS
 
 
FoV:
Limit:
Primaries only

02157+2503 COU 79AB distance=0' 02157+2503 RAO 635Ca,Cb distance=4' 02154+2507 POU 165 distance=7' 02162+2455 POU 168 distance=11' 02159+2431 POU 166 distance=32' 02136+2521 GRV 116 distance=34' 02157+2426 HDO 57 distance=38' 02140+2431 POU 164 distance=40' 02127+2439 POU 163 distance=48' 02168+2415 POU 170 distance=51' 02194+2512 POU 173 distance=51' 02189+2529 POU 172 distance=52' 02197+2446 POU 174 distance=58' 02204+2456 POU 175 distance=64' 02165+2355 POU 169 distance=69' 02174+2353 STF 240 distance=74' 02105+2435 POU 161 distance=77' 02203+2415 J 1120 distance=79' 02123+2357 STF 226AB distance=81' 02123+2357 LEP 6AC distance=81' 02131+2616 LDS3358 distance=82' 02140+2342 HU 424 distance=84' 02112+2604 BRT3260AB distance=87' 02112+2604 BRT3260AC distance=87' 02092+2458 POU 160 distance=89' 02218+2425 POU 179 distance=91' 02222+2437 POU 180 distance=92' 02143+2326 AZC 22 distance=99' 02109+2348 HDS 292 distance=100' 02209+2353 POU 176 distance=100' 02094+2556 H 6 69AB distance=101' 02094+2556 H 6 69AC distance=101' 02206+2618 GRV 123 distance=101' 02200+2632 COU 355 distance=107' 02085+2547 LDS3347 distance=108' 02215+2348 POU 177 distance=108' 02229+2417 LDS3376 distance=108' 02083+2543 ALP 6AB distance=109' 02083+2543 ALP 6AC distance=109' 02236+2502 LDS3379 distance=109' 02118+2327 POU 162 distance=110' 02237+2433 POU 183 distance=113' 02228+2406 HJL1017 distance=113' 02184+2651 SKF2813 distance=115' 02216+2338 STF 254 distance=117' 02217+2631 A 2014 distance=120' 02164+2703 TDS2187 distance=121' 02082+2356 UC 690 distance=122' 02190+2309 BRT2308 distance=123' 02106+2645 UC 692 distance=124' 02246+2537 ALP 7 distance=126' 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 02157+2503 COU 79 AB 39 0.2
Show 02157+2503 RAO 635 Ca,Cb 150 0.7 4
Show 02154+2507 POU 165 125 15.9 7
Show 02162+2455 POU 168 355 4.2 11
Show 02159+2431 POU 166 11 14.3 32
Show 02136+2521 GRV 116 188 42.7 34
Show 02157+2426 HDO 57 95 7.8 38
Show 02140+2431 POU 164 157 6.7 40
Show 02127+2439 POU 163 133 12.4 48
Show 02168+2415 POU 170 77 4.8 51
Show 02194+2512 POU 173 191 5.2 51
Show 02189+2529 POU 172 147 9.5 52
Show 02197+2446 POU 174 276 21.1 58
Show 02204+2456 POU 175 45 12.0 64
Show 02165+2355 POU 169 75 5.2 69
Show 02174+2353 STF 240 52 4.8 74
Show 02105+2435 POU 161 18 20.5 77
Show 02203+2415 J 1120 288 3.3 79
Show 02123+2357 STF 226 AB 231 1.8 81
Show 02123+2357 LEP 6 AC 102 252.6 81
Show 02131+2616 LDS3358 205 38.1 82
Show 02140+2342 HU 424 335 1.4 84
Show 02112+2604 BRT3260 AB 176 3.9 87
Show 02112+2604 BRT3260 AC 186 4.1 87
Show 02092+2458 POU 160 142 10.4 89
Show 02218+2425 POU 179 78 19.1 91
Show 02222+2437 POU 180 160 12.4 92
Show 02143+2326 AZC 22 6 18.5 99
Show 02109+2348 HDS 292 148 0.1 100
Show 02209+2353 POU 176 223 3.7 100
Show 02094+2556 H 6 69 AB 35 93.1 101
Show 02094+2556 H 6 69 AC 279 106.0 101
Show 02206+2618 GRV 123 47 12.1 101
Show 02200+2632 COU 355 344 4.5 107
Show 02085+2547 LDS3347 86 358.0 108
Show 02215+2348 POU 177 317 2.5 108
Show 02229+2417 LDS3376 65 95.3 108
Show 02083+2543 ALP 6 AB 117 31.8 109
Show 02083+2543 ALP 6 AC 304 31.8 109
Show 02236+2502 LDS3379 180 15.8 109
Show 02118+2327 POU 162 61 6.2 110
Show 02237+2433 POU 183 176 7.2 113
Show 02228+2406 HJL1017 256 114.3 113
Show 02184+2651 SKF2813 113 5.7 115
Show 02216+2338 STF 254 16 12.2 117
Show 02217+2631 A 2014 30 1.2 120
Show 02164+2703 TDS2187 106 0.5 121
Show 02082+2356 UC 690 307 40.4 122
Show 02190+2309 BRT2308 125 3.8 123
Show 02106+2645 UC 692 181 65.7 124
Show 02246+2537 ALP 7 48 41.5 126

 
 
WDS 02157+2503 : COMPONENTS
 
 
  A B C
B pa=36.5°
sep=0.19"
 
C pa=160.5°
sep=239.30"
pa=160.6°
sep=239.40"
 
Cb pa=160.5°
sep=239.96"
pa=160.5°
sep=240.07"
pa=152.5°
sep=0.67"
 
 
02157+2503 A
 
 
Name 21 Ari Coord arcsec 2000 021542.83+250235.7 Mag 6.4 Spectral class F6V (yellow-white)
PmRA -88.00 PmDE -87.0 SAO 75238 HIP 10535
Tycho2 1769-01309-1 HD 13872 HR 657 GC 2706
BD BD+24 329 Flamsteed 21 Arietis Flamsteed name 21 Ari FK5 1059
Tycho2
Tycho2 1769-01309-1 Pflag RAmdeg 33.92823939 DEmdeg 25.04303817
PmRA -88.1 PmDE -89.3 E RAmdeg 3 E DEmdeg 4
E pmRA 0.7 E pmDE 0.7 EpRAm 1991.46 EpDEm 1991.27
Num 21 Q RAmdeg 1.3 Q DEmdeg 1.0 Q pmRA 1.6
Q pmDE 0.9 BTmag 6.178 E BTmag 0.014 VTmag 5.637
E VTmag 0.009 Prox 999 TYC T HIP 10535
CCDM AB RAdeg 33.92846111 DEdeg 25.04324222 EpRA 1990 1.78
EpDE 1990 1.77 E RAdeg 3.4 E DEdeg 3.8 Posflg P
Corr -0.2
SAO
SAO 75238 DelFlag RA1950 PmRA1950 -0.0065
DE1950 PmDE1950 -0.082 Vmag 5.6 SpType F5
Double code Source 74 CatNum 1059 DM BD+24 329
DMcomp BDsup HD 13872 M HD 0
GC 2706 RA1950rad 0.57975283 DE1950rad 0.43305749 PmRA2000 -0.0065
PmDE2000 -0.086
Hipparcos
Catalog H HIP 10535 Proxy H RAhms 02 15 42.83
DEdms +25 02 35.7 Vmag 5.57 VarFlag R Vmag H
RAdeg 33.9285 DEdeg 25.0433 AstroRef * Plx 20.77
CCDM 02157+2503 N CCDM I Nsys 1 Ncomp 2
MultFlag C Source S Qual A M HIP AB
Theta 36 Rho 0.187 HD 13872 BD BD+24 329
CD CP Dm number +24 329 VIred 0.58
SpType F6V R SpType Coord arcsec 2000 021542.83+250235.7
Hipparcos 2
HIP 10535 Sn 55 So 3 Nc 2
RArad 0.5921636272 DErad 0.4370872595 Plx 19.58 PmRA -89.72
PmDE -86.42 E RArad 0.43 E DErad 0.34 E Plx 0.61
E pmRA 0.52 E pmDE 0.5 Hpmag 5.6885 E Hpmag 0.0004
SHp 0.005 VA 0 BV 0.52 E BV 0.004
VI 0.59
CCDM
Ccdm 02157+2503 RComp Comp A Note1
Note2 Discov num DRAs 0.76 DDEs -25.0
R dRAs 10 Year Theta Rho
Obs 2 Vmag 6.5 Sp F5 PmNote *
PmRA -89 PmDE -82 Dm number +24 329 Cat1 BD
Name2 +24 201 Cat2 AGK2/3 HD 13872 M HD
ADS BDS M ADS BDS N IDS IDS 02101N2435A
HIC 10535
 
 
02157+2503 B
 
 
Coord arcsec 2000 021542.84+250235.9 Mag 6.48 Calc delta mag 0.08 Calc coord yes
CCDM
Ccdm 02157+2503 RComp Comp B Note1 *
Note2 Discov num COU 79 DRAs DDEs
R dRAs Year 1965 Theta 50 Rho 0.2
Obs 1 Vmag 6.8 Sp PmNote
PmRA PmDE Dm number Cat1
Name2 Cat2 HD M HD
ADS BDS M ADS BDS N IDS IDS 02101N2435B
HIC 10535
 
 
02157+2503 C
 
 
Coord arcsec 2000 021548.70+245850.1 Mag 12.2 PmRA -88.00 PmDE -90.0
Calc delta mag 5.8
 
 
02157+2503 Cb
 
 
Coord arcsec 2000 021548.72+245849.5 Mag 13.9 Calc delta mag 7.5 Calc coord yes