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Doubles in session


Current system
07201+2159
STF 1066
Wasat


Nearby doubles
11' : 07194+2201
HDS1023

11' : 07200+2210
HO 33

27' : 07182+2157
COU 276

37' : 07227+2205
HO 345AB

41' : 07175+2142
UC 1559

41' : 07190+2122
COU 88

43' : 07230+2213
RAO 217

46' : 07216+2118
OCC 279

47' : 07190+2243
HJ 416

49' : 07167+2206
GRV 731

49' : 07205+2247
POU2702

54' : 07213+2250
POU2712

55' : 07239+2212
COU 277

58' : 07192+2255
POU2682

61' : 07186+2255
POU2669

62' : 07187+2258
BKO 725

63' : 07184+2257
WLY 2

63' : 07192+2058
HDS1019AB

64' : 07191+2301
POU2680

64' : 07156+2210
OCC9133

64' : 07156+2158
BLL 20

64' : 07224+2255
POU2728

65' : 07241+2127
STF1081AB

65' : 07216+2301
POU2717

67' : 07187+2302
POU2671

72' : 07181+2304
POU2654



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.

07201+2159 STF 1066 (Wasat)

 
 
07h 20m 07.39s +21° 58' 56.4" P.A. 229.00 sep 5.5 mag 3.55,8.18 Sp F2V+K6V dist. 18.54 pc (60.48 l.y.)
 
 
Coord 2000 07201+2159 Discov num STF1066 Comp Coord arcsec 2000 07 20 07.39 +21 58 56.4
Date first 1822 Date last 2018 Obs 275
Pa first 198 Pa last 228.9 P.A. Now (θ) 228.9°
Sep first 7.1 Sep last 5.541 Sep. Now (ρ) 5.541"
Mag pri 3.55 Mag sec 8.18 delta mag (ΔM) 4.63 Spectral class F2V+K6V (yellow-white/yellow-orange)
Pri motion ra -028 Sec motion ra -028
Pri motion dec -015 Sec motion dec -013
Notes N O T (See Notes, Orbital solution, Parallax indicates physical)
rPM=0.063 (< 0.3, Physical double)
This double is physical.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Common name Wasat Constellation Gemini SAO 79294 HIP 35550
Tycho2 1359-02672-1 Gaia DR2 866177431953646464 HD 56986 HR 2777
GC 9755 ADS 5983 BD BD+22 1645 Bayer Delta Geminorum
Bayer name Del Gem Flamsteed 55 Geminorum Flamsteed name 55 Gem FK5 279
Distance 18.54 Distance ly 60.48 Bayer greek δ Gem
Other names Wesat
Meaning the center of the sky
 
 
ORBITAL ELEMENTS
 
 
Period (P)1418.4375y± 625.7623 Periastron (T)2150.9833y± 47.4472 Semi-major axis (a)7.76117a± 2.62776
Eccentricity (e)0.70913± 0.24789 Inclination (i)51.036°± 13.893 Longitude of periastron (ω)268.361°± 11.904
Node (Ω)70.828°± 34.531 Notesn ReferenceIzm2019
Equinox Last observation2013 Grade5(1=Definitive, 9=Indet.)
label theta rho
2000 224.9 5.827
2001 225.1 5.812
2002 225.3 5.796
2003 225.5 5.781
2004 225.7 5.765
2005 225.9 5.750
2006 226.1 5.734
2007 226.3 5.718
2008 226.5 5.702
2009 226.7 5.686
2010 227.0 5.669
2011 227.2 5.653
2012 227.4 5.637
2013 227.6 5.620
2014 227.8 5.603
2015 228.0 5.586
2016 228.2 5.569
2017 228.5 5.552
2018 228.7 5.535
2019 228.9 5.517
2020 229.1 5.499
2021 229.4 5.482
2022 229.6 5.464
2023 229.8 5.446
2024 230.0 5.427
2025 230.3 5.409
2026 230.5 5.391
2027 230.7 5.372
2028 231.0 5.353
2029 231.2 5.334
2030 231.4 5.315
2031 231.7 5.296
2032 231.9 5.276
2033 232.2 5.257
2034 232.4 5.237
2035 232.7 5.217
2036 232.9 5.197
2037 233.2 5.176
2038 233.4 5.156
2039 233.7 5.135
2040 233.9 5.114
2041 234.2 5.093
2042 234.5 5.072
2043 234.7 5.050
2044 235.0 5.029
2045 235.3 5.007
2046 235.5 4.985
2047 235.8 4.962
2048 236.1 4.940
2049 236.4 4.917
2050 236.6 4.894


 
 grafico orbita
Note: Theta is PA, Rho is Sep. For yearly orbits, data refer to Jan 1st.
wds07201%2B2159c.png orbit plot
Measures: green=micrometric, blue=interferometric, purple=photographic
 
 
WDS 07201+2159 STF 1066 (Wasat) : NOTES
 
 
discov_num notes refcode
STF1066 del Gem = 55 Gem = Wasat. CHE 85.
Star A is an occultation double and SB1, P = 6.129 yr.
Hipparcos astrometric solution adopted some elements from the orbit of HIP1997d
Abt (1965). AbH1965
H 2 27. MEv2010
NPOI uniform disk diameter 0.999 +/- 0.121 mas, Limb darkened diameter
1.032 +/- 0.125 mas. NOI2025
 
 
REFERENCES
 
 
refcode metd author reference
AbH1965 - Abt, H.A. 1965A&AS...11..429A
AbH1965 A&AS 11, 429, 1965
HIP1997d orb - Hipparcos 1997yCat.1239....0E
HIP1997d Hipparcos Catalog, ESA SP-1200, 1997
HIP1997d (DMSA/O Orbital Solutions)
Izm2019 orb u Izmailov, I.S. 2019AstL...45...30I
Izm2019 Ast. Lett. 45, 30, 2019
Izm2019
Izm2019
MEv2010 - MacEvoy, B. ...................
MEv2010 private communication, 2010 (see http://www.handprint.com/ASTRO/index.html)
NOI2025 not j Baines, E.K., Clark, J.H. III, Kingsley, B.I., Schmitt, H.R. & Stone, J.M. 2025AJ....169..293B
NOI2025
 
 
DISCOVERER
 
 
discov author
ABH Abt, H.A.
HIP (non-component double star solution: G = acceleration solution,
HIP O = orbit solution, V = variability-induced mover, X = stochastic solution)
IZM Izmailov, I.S., Khovricheva, M.L., Khovrichev, M. Yu., Kiyaeva, O.V., Khrutskaya,
IZM E.V., Romanenko, L.G., Grosheva, E.A., Maslennikov, K.L. & Kalinichenko, O.A.
NOI Benson, J.A., Hutter, D.J., Elias, N.M., Bowers, P.F., Johnston, K.J.,
NOI Hajian, A.R., Armstrong, J.T., Mozurkewich, D., et al.
NOI Nordgren, T.E., Germain, M.E., Benson, J.A., Mozurkewich, D., Sudol, J.J., Elias,
NOI II, N.M., Hajian, A.R., White, N.M., Hutter, D.J., Johnston, K.J., Gauss, F.S.,
NOI Armstrong, J.T., Pauls, T.A. & Rickard, L.J.
NOI Armstrong, J.T., Nordgren, T.E., Germain, M.E., Hajian, A.R., Hindsley, R.B.,
NOI Hummel, C.A., Mozurkewich, D. & Thessin, R.N.
NOI Armstrong, J.T., Mozurkewich, D., Hajian, A.R., Johnston, K.J., Thessin, R.N.,
NOI Peterson, D.M., Hummel, C.A., & Gilbreath, G.C.
NOI Koubsky, P., Hummel, C.A., Harmanec, P., Tycner, C., van Leeuwen, F., Yang, S.,
NOI Slechta, M., Bozic, H., Zavala, R.T., Ruzdjak, D., & Sudar, D.
NOI Che, X., Monnier, J.D., Tycner, C., Kraus, S., Zavala, R.T., Baron, F., Pedretti,
NOI E., ten Brummelaar, T., McAlister, H., Ridgway, S.T., Sturmann, J., Sturmann, L.,
NOI & Turner, N.
NOI Hutter, D.J., Zavala, R.T., Tycner, C., Benson, J.A., Hummel, C.A., Sanborn, J.,
NOI Franz, O.G., & Johnston, K.J.
NOI Schaefer, G.H., Hummel, C.A., Gies, D.R., Zavala, R.T., Monnier, J.D.,
NOI Walter, F.M., Turner, N.H., Baron, F., ten Brummelaar, T., Che, X.,
NOI Farrington, C.D., Kraus, S., Sturmann, J., & Sturmann, L.
NOI Baines, E.K., Armstrong, J.T., Schmitt, H.R., Zavala, R.T., Benson, J.A., Hutter,
NOI AJ 155, 30, 2018
NOI Mason, B.D., Griffin, R.E.M., Zavala, R.T., Hummel, C.A., Hurowitz, H.M., Hurowitz,
STF (F. Struve DD - Appendix list #1)
 
 
WDS HISTORIC DATA
 
 
coord_2000 discov_num comp epoch obs pa sep mag_pri mag_sec spectr dm_number notes coord_arcsec_2000
07201+2159 STF1066 2006 230 225 5.4 3.55 8.18 A9III K3V +22 1645 NOD 072007.39+215856.4
07201+2159 STF1066 2009 232 226 5.6 3.55 8.18 A9III K3V +22 1645 NOD 072007.39+215856.4
07201+2159 STF1066 2012 240 228 5.6 3.55 8.18 A9III K3V +22 1645 NOD 072007.39+215856.4
07201+2159 STF1066 2013 254 230 5.6 3.55 8.18 A9III K3V +22 1645 NOD 072007.39+215856.4
07201+2159 STF1066 2015 258 228 5.7 3.55 8.18 A9III+K3V +22 1645 NO 072007.39+215856.4
07201+2159 STF1066 2016 267 230 5.5 3.55 8.18 A9III+K3V +22 1645 NO 072007.39+215856.4
07201+2159 STF1066 2017 268 234 5.4 3.55 8.18 A9III+K3V +22 1645 NO 072007.39+215856.4
07201+2159 STF1066 2018 273 229 5.5 3.55 8.18 A9III+K3V +22 1645 NO 072007.39+215856.4

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

 
 
WDS 07201+2159 STF 1066 (Wasat) : VISUAL OBSERVATIONS REPORTS
 
 
Show date username difficulty separation pa_estim interest notes
Show 11/02/04 voyager75 easy separated   interesting but to observe in better conditions Stretta, osservata con PL6mm - 151X – La primaria è Gialla, la secondaria forse bianca – Appena fuori dall.anello di diffrazione

 
 
WDS 07201+2159 STF 1066 (Wasat) : MEASURES
 
 
No records found.

 
 
WDS 07201+2159 (Wasat) : VIRTUAL EYEPIECE
 
 

07201+2159 STF1066A mag 3.55 Sp F2V 07201+2159 STF1066B sep 5.5 P.A. 228.90 mag 8.18 Sp K6V 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 07201+2159 (Wasat) : ALADIN DSS IMAGE @ 07h 20m 07.39s +21° 58' 56.4"
 
 
 
 
WDS 07201+2159 STF 1066 (Wasat) : NEIGHBORHOODS
 
 
FoV:
Limit:
Primaries only

07201+2159 STF1066 (Wasat) distance=0' 07194+2201 HDS1023 distance=11' 07200+2210 HO 33 distance=11' 07182+2157 COU 276 distance=27' 07227+2205 HO 345AB distance=37' 07227+2205 HO 345AC distance=37' 07175+2142 UC 1559 distance=41' 07190+2122 COU 88 distance=41' 07230+2213 RAO 217 distance=43' 07216+2118 OCC 279 distance=46' 07190+2243 HJ 416 distance=47' 07167+2206 GRV 731 distance=49' 07205+2247 POU2702 distance=49' 07213+2250 POU2712 distance=54' 07239+2212 COU 277 distance=55' 07192+2255 POU2682 distance=58' 07186+2255 POU2669 distance=61' 07187+2258 BKO 725 distance=62' 07184+2257 WLY 2 distance=63' 07192+2058 HDS1019AB distance=63' 07192+2058 KPP4367AB,C distance=63' 07191+2301 POU2680 distance=64' 07156+2210 OCC9133 distance=64' 07156+2158 BLL 20 distance=64' 07224+2255 POU2728 distance=64' 07241+2127 STF1081AB distance=65' 07241+2127 STF1081AC distance=65' 07216+2301 POU2717 distance=65' 07187+2302 POU2671 distance=67' 07181+2304 POU2654 distance=72' 07183+2307 POU2664 distance=73' 07162+2248 POU2622 distance=74' 07236+2255 POU2738 distance=75' 07182+2310 POU2661 distance=76' 07191+2314 POU2681 distance=77' 07196+2317 POU2690 distance=78' 07157+2247 BKO 723AB distance=79' 07157+2247 BKO 723AC distance=79' 07156+2246 POU2610 distance=79' 07171+2305 POU2635 distance=79' 07186+2316 POU2670 distance=80' 07225+2312 POU2730 distance=80' 07229+2310 POU2735 distance=81' 07180+2324 POU2649 distance=81' 07260+2205 AG 140 distance=82' 07146+2130 OCC 816 distance=83' 07261+2153 OCC 634Aa,Ab distance=84' 07261+2153 BID 2AB distance=84' 07171+2311 POU2637 distance=84' 07152+2249 POU2603 distance=85' 07160+2302 POU2618AB distance=85' 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 Wasat 07201+2159 STF1066 229 5.5 0
Show 07194+2201 HDS1023 69 0.7 11
Show 07200+2210 HO 33 328 2.7 11
Show 07182+2157 COU 276 230 1.1 27
Show 07227+2205 HO 345 AB 286 1.2 37
Show 07227+2205 HO 345 AC 230 24.5 37
Show 07175+2142 UC 1559 259 90.8 41
Show 07190+2122 COU 88 160 0.4 41
Show 07230+2213 RAO 217 20 0.3 43
Show 07216+2118 OCC 279 -1 0.1 46
Show 07190+2243 HJ 416 78 9.4 47
Show 07167+2206 GRV 731 267 27.7 49
Show 07205+2247 POU2702 105 9.9 49
Show 07213+2250 POU2712 208 15.0 54
Show 07239+2212 COU 277 248 1.0 55
Show 07192+2255 POU2682 88 6.2 58
Show 07186+2255 POU2669 73 11.0 61
Show 07187+2258 BKO 725 204 21.5 62
Show 07184+2257 WLY 2 264 16.3 63
Show 07192+2058 HDS1019 AB 163 0.2 63
Show 07192+2058 KPP4367 AB,C 334 32.0 63
Show 07191+2301 POU2680 256 12.9 64
Show 07156+2210 OCC9133 -1 0.0 64
Show 07156+2158 BLL 20 265 94.4 64
Show 07224+2255 POU2728 346 13.3 64
Show 07241+2127 STF1081 AB 234 1.9 65
Show 07241+2127 STF1081 AC 63 107.0 65
Show 07216+2301 POU2717 342 13.2 65
Show 07187+2302 POU2671 218 10.8 67
Show 07181+2304 POU2654 177 4.7 72
Show 07183+2307 POU2664 230 13.3 73
Show 07162+2248 POU2622 253 14.0 74
Show 07236+2255 POU2738 186 6.3 75
Show 07182+2310 POU2661 252 4.2 76
Show 07191+2314 POU2681 33 11.4 77
Show 07196+2317 POU2690 205 9.9 78
Show 07157+2247 BKO 723 AB 16 5.4 79
Show 07157+2247 BKO 723 AC 308 7.8 79
Show 07156+2246 POU2610 182 8.5 79
Show 07171+2305 POU2635 172 11.2 79
Show 07186+2316 POU2670 314 11.7 80
Show 07225+2312 POU2730 185 12.3 80
Show 07229+2310 POU2735 275 7.0 81
Show 07180+2324 POU2649 36 15.8 81
Show 07260+2205 AG 140 177 2.2 82
Show 07146+2130 OCC 816 -1 0.1 83
Show 07261+2153 OCC 634 Aa,Ab -1 0.1 84
Show 07261+2153 BID 2 AB 321 100.3 84
Show 07171+2311 POU2637 344 4.4 84
Show 07152+2249 POU2603 103 11.0 85
Show 07160+2302 POU2618 AB 235 8.9 85

 
 
WDS 07201+2159 : COMPONENTS
 
 
  A
B pa=228.9°
sep=5.54"
 
 
07201+2159 A
 
 
Common name Wasat Meaning the center of the sky Other names Wesat Coord arcsec 2000 072007.39+215856.4
Mag 3.55 Spectral class F2V (yellow-white) PmRA -28.00 PmDE -15.0
HIP 35550 Tycho2 1359-02672-1 HD 56986 HR 2777
GC 9755 BD BD+22 1645 Bayer Delta Geminorum Bayer name del Gem
Flamsteed 55 Geminorum Flamsteed name 55 Gem FK5 279
Tycho2
Tycho2 1359-02672-1 Pflag X RAmdeg DEmdeg
PmRA PmDE E RAmdeg E DEmdeg
E pmRA E pmDE EpRAm EpDEm
Num Q RAmdeg Q DEmdeg Q pmRA
Q pmDE BTmag 3.921 E BTmag 0.014 VTmag 3.559
E VTmag 0.009 Prox 999 TYC T HIP 35550
CCDM RAdeg 110.03078667 DEdeg 21.98233972 EpRA 1990 1.76
EpDE 1990 1.60 E RAdeg 3.3 E DEdeg 3.7 Posflg
Corr 0.1
Hipparcos
Catalog H HIP 35550 Proxy RAhms 07 20 07.39
DEdms +21 58 56.4 Vmag 3.5 VarFlag R Vmag G
RAdeg 110.031 DEdeg 21.9823 AstroRef + Plx 55.45
CCDM -18.72 N CCDM I Nsys 1 Ncomp 1
MultFlag O Source Qual M HIP
Theta Rho HD BD BD+22 1645
CD CP Dm number +22 1645 VIred 0.44
SpType F0IV... R SpType Coord arcsec 2000 072007.39+215856.4
Hipparcos 2
HIP 35550 Sn 75 So 4 Nc 1
RArad 1.9203995423 DErad 0.3836642074 Plx 53.94 PmRA -15.13
PmDE -9.79 E RArad 0.57 E DErad 0.39 E Plx 0.66
E pmRA 0.85 E pmDE 0.47 Hpmag E Hpmag 0.0006
SHp 0.004 VA 0 BV 0.374 E BV 0.015
VI 0.44
CCDM
Ccdm 07201+2159 RComp Comp A Note1
Note2 % Discov num DRAs 1.36 DDEs -3.6
R dRAs 10 Year Theta Rho
Obs 2 Vmag 3.5 Sp F0 PmNote *
PmRA -25 PmDE -14 Dm number +22 1645 Cat1 BD
Name2 +22 862 Cat2 AGK2/3 HD 56986 M HD
ADS BDS A 5983 M ADS BDS N IDS IDS 07142N2210A
HIC 35550
 
 
07201+2159 B
 
 
Coord arcsec 2000 072007.09+215852.8 Mag 8.18 Spectral class K6V (yellow-orange) PmRA -28.00
PmDE -13.0 Delta magnitude 4.63 Coordinate calculated yes
CCDM
Ccdm 07201+2159 RComp Comp B Note1 *
Note2 Discov num STF1066 DRAs DDEs
R dRAs Year 1829 Theta Rho
Obs 99 Vmag 8.5 Sp PmNote
PmRA PmDE Dm number Cat1
Name2 Cat2 HD M HD
ADS BDS A 5983 M ADS BDS N IDS IDS 07142N2210B
HIC 35550