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Doubles in session


Current system
11159+1318
MCA 35
73 Leo


Nearby doubles
50' : 11167+1406
HJL1061

71' : 11151+1428
GWP1563

74' : 11190+1416
STF1527

78' : 11183+1210
GWP1572

82' : 11122+1217
CVR1348

93' : 11210+1413
CVR1360

96' : 11216+1231
FMR 219

97' : 11196+1158
LDS4082

97' : 11137+1147
RAO 259

97' : 11100+1237
LDS6240

120' : 11190+1129
HJ 179

121' : 11100+1443
HEI 60

128' : 11243+1354
HDS1622AB

131' : 11099+1456
BPMA 44AB

132' : 11104+1502
HEI 61

133' : 11075+1232
J 2079AB

134' : 11243+1410
HJ 180

135' : 11144+1531
BU 1283

137' : 11095+1138
LDS4066

138' : 11208+1515
LDS4085

138' : 11115+1520
BPM 580

139' : 11247+1410
SKF1078

139' : 11115+1115
DVG 30

141' : 11111+1116
DVG 29

144' : 11061+1325
BRT1271

147' : 11108+1524
BRT1272



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.

11159+1318 MCA 35 (73 Leo)

 
 
11h 15m 51.90s +13° 18' 27.3" P.A. 310.00 sep 0.0 mag 5.50,7.30 Sp K1III+A7V dist. 118.48 pc (386.48 l.y.)
 
 
Coord 2000 11159+1318 Discov num MCA  35 Comp Coord arcsec 2000 11 15 51.90 +13 18 27.3
Date first 1979 Date last 2021 Obs 13
Pa first 280 Pa last 309.7 P.A. Now (θ) 309.7°
Sep first 0.1 Sep last 0.034 Sep. Now (ρ) 0.034"
Mag pri 5.50 Mag sec 7.30 delta mag (ΔM) 1.8 Spectral class K1III+A7V (yellow-orange/white)
Pri motion ra -004 Sec motion ra
Pri motion dec -012 Sec motion dec
Notes N O (See Notes, Orbital solution)
This double is physical.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Name 73 Leo Constellation Leo SAO 99525 HIP 55016
Tycho2 0861-01283-1 Gaia DR2 3965092440205592064 HD 97907 HR 4365
GC 15487 BD BD+14 2367 Flamsteed 73 Leonis Flamsteed name 73 Leo
Distance 118.48 Distance ly 386.48
 
 
ORBITAL ELEMENTS
 
 
Period (P)8.112y± 0.0078 Periastron (T)1974.015y± 0.028 Semi-major axis (a)0.0462a± 0.0011
Eccentricity (e)0.415± 0.008 Inclination (i)49.1°± 4.1 Longitude of periastron (ω)156.5°± 1.6
Node (Ω)283.3°± 4.4 Notesn ReferenceMsn1997b
Equinox2000 Last observation1993 Grade4(1=Definitive, 9=Indet.)
label theta rho
2000 204.0 0.032
2001 241.6 0.047
2002 261.2 0.060
2003 275.8 0.064
2004 290.8 0.057
2005 314.9 0.039
2006 36.9 0.021
2007 127.0 0.028
2008 197.6 0.031
2009 238.7 0.046
2010 259.4 0.059
2011 274.2 0.064
2012 288.9 0.059
2013 311.0 0.042
2014 22.3 0.021
2015 119.1 0.028
2016 190.6 0.030
2017 235.5 0.044
2018 257.6 0.057
2019 272.6 0.064
2020 287.1 0.060
2021 307.6 0.044
2022 8.5 0.022
2023 111.3 0.028
2024 183.2 0.029
2025 232.1 0.042
2026 255.6 0.056
2027 271.1 0.063
2028 285.3 0.061
2029 304.5 0.047
2030 356.2 0.024


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


 
  


wds11159%2B1318b.png orbit plot
Measures: green=micrometric, blue=interferometric, purple=photographic		  
 
 
WDS 11159+1318 MCA 35 (73 Leo) : NOTES
 
 
discov_num notes refcode
MCA 35 73 Leo. A spectroscopic binary now resolved by speckle interferometry.
1985.1123, 1985.2053: This system has been observed at the limit of
resolution of a 2-m telescope, so delta m is probably < 1. Bnu1986
Values of P, T, e, and omega for the Ren & Fu (2007) orbit are adopted RSl2007
from the orbit of Mason et al. (1997). Their derived masses for the Msn1997b
primary and secondary are 1.81 +/- 0.49 and 1.54 +/- 0.42 Msun,
respectively. The authors note that these masses are less than the
ones predicted by either the Mason et al. or Mante (2002) solutions, Mnt2002a
but that their secondary mass is in reasonable agreement with the
value expected for an F1 main-sequence star.
Martin et al. (1998) derive component masses 2.624 +/- 1.197 and
2.315 +/- 1.075 Msun. Mig1998
Malkov et al. (2012) derive dynamical and spectroscopic masses
2.49 +/- 0.65 and 2.40 Msun, respectively. Mlk2012
 
 
REFERENCES
 
 
refcode metd author reference
Bnu1986 S j Bonneau, D., Balega, Y., Blazit, A, Foy, R., Vakili, F., & Vidal, J.L. 1986A&AS...65...27B
Bnu1986 A&AS 65, 27, 1986
Mig1998 orb - Martin, Ch., Mignard, F., Hartkopf, W.I., & McAlister, H.A. 1998A&AS..133..149M
Mig1998 A&AS 133, 149, 1998
Mlk2012 not - Malkov, O.Yu., Tamazian, V.S., Docobo, J.A., & Chulkov, D.A. 2012A&A...546A..69M
Mlk2012 A&A 546, A69, 2012
Mnt2002a orb - Mante, R. 2002IAUDS.146....1M
Mnt2002a Inf. Circ. 146, 1, 2002
Msn1997b Sc j Mason, B.D., McAlister, H.A., Hartkopf, W.I., Griffin, R.F. & Griffin, R.E.M. 1997AJ....114.1607M
Msn1997b +orb AJ 114, 1607, 1997
RSl2007 orb - Ren Shu-lin & Fu Yan-ning .
RSl2007 Chinese Astron. & Astrophys. 31, 277, 2007
 
 
DISCOVERER
 
 
idgroup discov author
1 MCA McAlister, H.A.
46 MCA McAlister, H.A., Hartkopf, W.I., Bagnuolo, W.G., Sowell, J.R., Franz, O.G., &
46 MCA Evans, D.S.
61 MCA Fu, H.-H., Hartkopf, W.I., Mason, B.D., McAlister, H.A., Dombrowski, E.G., &
61 MCA Franz, O.G.
 
 
WDS HISTORIC DATA
 
 
coord_2000 discov_num comp epoch obs pa sep mag_pri mag_sec spectr notes coord_arcsec_2000
11159+1318 MCA 35 1993 7 250 0.1 5.50 7.30 K3III NO 111551.90+131827.3
11159+1318 MCA 35 2003 8 139 0.1 5.32   K3III NOD 111551.90+131827.3
11159+1318 MCA 35 2018 8 263 0.1 5.50 7.30 K1III+A7V NO 111551.90+131827.3
11159+1318 MCA 35 2019 10 277 0.1 5.50 7.30 K1III+A7V NO 111551.90+131827.3
11159+1318 MCA 35 2020 12 288 0.1 5.50 7.30 K1III+A7V NO 111551.90+131827.3
11159+1318 MCA 35 2021 13 310 0.0 5.50 7.30 K1III+A7V NO 111551.90+131827.3

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

 
 
WDS 11159+1318 MCA 35 (73 Leo) : VISUAL OBSERVATIONS REPORTS
 
 
No records found.


 
 
WDS 11159+1318 MCA 35 (73 Leo) : MEASURES
 
 
No records found.

 
 
WDS 11159+1318 (73 Leo) : VIRTUAL EYEPIECE
 
 

11159+1318 MCA 35A mag 5.5 Sp K1III 11159+1318 MCA 35B mag 7.3 Sp A7V 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 11159+1318 (73 Leo) : ALADIN DSS IMAGE @ 11h 15m 51.90s +13° 18' 27.3"
 
 
 
 
WDS 11159+1318 MCA 35 (73 Leo) : NEIGHBORHOODS
 
 
FoV:
Limit:
Primaries only

11159+1318 MCA 35 distance=0' 11167+1406 HJL1061 distance=50' 11151+1428 GWP1563 distance=71' 11190+1416 STF1527 distance=74' 11183+1210 GWP1572 distance=78' 11122+1217 CVR1348 distance=82' 11210+1413 CVR1360 distance=93' 11216+1231 FMR 219 distance=96' 11196+1158 LDS4082 distance=97' 11137+1147 RAO 259 distance=97' 11100+1237 LDS6240 distance=97' 11190+1129 HJ 179 distance=120' 11100+1443 HEI 60 distance=121' 11243+1354 HDS1622AB distance=128' 11243+1354 TOK 545AC distance=128' 11243+1354 TOK 545AD distance=128' 11099+1456 BPMA 44AB distance=131' 11104+1502 HEI 61 distance=132' 11075+1232 J 2079AB distance=133' 11075+1232 J 2079AC distance=133' 11243+1410 HJ 180 distance=134' 11144+1531 BU 1283 distance=135' 11095+1138 LDS4066 distance=137' 11208+1515 LDS4085 distance=138' 11115+1520 BPM 580 distance=138' 11247+1410 SKF1078 distance=139' 11115+1115 DVG 30 distance=139' 11111+1116 DVG 29 distance=141' 11061+1325 BRT1271 distance=144' 11108+1524 BRT1272 distance=147' 11065+1416 HU 885AB distance=148' 11065+1416 LEP 39AC distance=148' 11104+1110 HDS1591 distance=152' 11130+1550 GWP1559 distance=158' 11099+1107 FYM 37AC distance=159' 11099+1107 FYM 37AB distance=159' 11083+1513 SKF2630 distance=160' 11098+1531 TOK 716 distance=160' 11244+1140 GOM 13 distance=160' 11091+1105 HJ 176AB distance=161' 11260+1213 YSC 41AB distance=162' 11260+1213 GII 174Aa,Ab distance=162' 11107+1542 GRV 830 distance=162' 11055+1424 GWP1536 distance=165' 11100+1054 J 82 distance=168' 11150+1607 DEA 75 distance=169' 11046+1240 SIN 62Aa,Ab distance=170' 11046+1240 HJ 174AB distance=170' 11169+1026 SLW 585 distance=174' 11128+1031 HEI 500 distance=175' 11062+1133 CVR1342 distance=177' 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 11159+1318 MCA 35 310 0.0
Show 11167+1406 HJL1061 132 173.4 50
Show 11151+1428 GWP1563 237 356.9 71
Show 11190+1416 STF1527 308 0.5 74
Show 11183+1210 GWP1572 145 26.2 78
Show 11122+1217 CVR1348 281 4.9 82
Show 11210+1413 CVR1360 14 4.0 93
Show 11216+1231 FMR 219 111 3.6 96
Show 11196+1158 LDS4082 91 41.3 97
Show 11137+1147 RAO 259 111 0.7 97
Show 11100+1237 LDS6240 61 121.6 97
Show 11190+1129 HJ 179 301 16.2 120
Show 11100+1443 HEI 60 238 0.4 121
Show 11243+1354 HDS1622 AB 39 0.7 128
Show 11243+1354 TOK 545 AC 203 926.7 128
Show 11243+1354 TOK 545 AD 137 999.9 128
Show 11099+1456 BPMA 44 AB 310 222.0 131
Show 11104+1502 HEI 61 81 0.3 132
Show 11075+1232 J 2079 AB 87 3.4 133
Show 11075+1232 J 2079 AC 96 36.8 133
Show 11243+1410 HJ 180 43 25.7 134
Show 11144+1531 BU 1283 182 0.3 135
Show 11095+1138 LDS4066 101 146.5 137
Show 11208+1515 LDS4085 172 46.3 138
Show 11115+1520 BPM 580 19 30.8 138
Show 11247+1410 SKF1078 182 0.8 139
Show 11115+1115 DVG 30 259 46.3 139
Show 11111+1116 DVG 29 166 19.8 141
Show 11061+1325 BRT1271 186 3.1 144
Show 11108+1524 BRT1272 354 4.1 147
Show 11065+1416 HU 885 AB 254 2.1 148
Show 11065+1416 LEP 39 AC 254 668.5 148
Show 11104+1110 HDS1591 43 0.6 152
Show 11130+1550 GWP1559 90 145.6 158
Show 11099+1107 FYM 37 AC 98 44.5 159
Show 11099+1107 FYM 37 AB 121 59.6 159
Show 11083+1513 SKF2630 129 9.6 160
Show 11098+1531 TOK 716 249 2.6 160
Show 11244+1140 GOM 13 134 234.2 160
Show 11091+1105 HJ 176 AB 35 18.3 161
Show 11260+1213 YSC 41 AB 280 1.2 162
Show 11260+1213 GII 174 Aa,Ab 84 0.4 162
Show 11107+1542 GRV 830 185 33.5 162
Show 11055+1424 GWP1536 51 11.2 165
Show 11100+1054 J 82 110 2.0 168
Show 11150+1607 DEA 75 7 18.0 169
Show 11046+1240 SIN 62 Aa,Ab 39 2.2 170
Show 11046+1240 HJ 174 AB 357 59.3 170
Show 11169+1026 SLW 585 90 20.3 174
Show 11128+1031 HEI 500 81 1.6 175
Show 11062+1133 CVR1342 148 3.6 177

 
 
WDS 11159+1318 : COMPONENTS
 
 
  A
B pa=310.5°
sep=0.03"
 
 
11159+1318 A
 
 
Componente originario normalizzato AB Name 73 Leo Coord arcsec 2000 111551.90+131827.3 Mag 5.5
Spectral class K1III (yellow-orange) PmRA -4.00 PmDE -12.0 SAO 99525
HIP 55016 Tycho2 0861-01283-1 HD 97907 HR 4365
GC 15487 BD BD+14 2367 Flamsteed 73 Leonis Flamsteed name 73 Leo
Tycho2
Tycho2 0861-01283-1 Pflag RAmdeg 168.96622432 DEmdeg 13.30756743
PmRA -4.4 PmDE -10.6 E RAmdeg 4 E DEmdeg 4
E pmRA 0.6 E pmDE 0.6 EpRAm 1991.12 EpDEm 1990.94
Num 24 Q RAmdeg 1.0 Q DEmdeg 1.0 Q pmRA 1.0
Q pmDE 1.2 BTmag 6.843 E BTmag 0.015 VTmag 5.450
E VTmag 0.009 Prox 999 TYC T HIP 55016
CCDM RAdeg 168.96623472 DEdeg 13.30759222 EpRA 1990 1.81
EpDE 1990 1.58 E RAdeg 3.5 E DEdeg 3.9 Posflg
Corr 0.1
SAO
SAO 99525 DelFlag RA1950 PmRA1950 -0.0005
DE1950 PmDE1950 -0.013 Vmag 5.5 SpType K0
Double code Source 70 CatNum 15487 DM BD+14 2367
DMcomp BDsup HD 97907 M HD 0
GC 15487 RA1950rad 2.93760781 DE1950rad 0.23702674 PmRA2000 -0.0004
PmDE2000 -0.008
Hipparcos
Catalog H HIP 55016 Proxy RAhms 11 15 51.90
DEdms +13 18 27.3 Vmag 5.31 VarFlag R Vmag H
RAdeg 168.966 DEdeg 13.3076 AstroRef Plx 6.82
CCDM N CCDM Nsys Ncomp 1
MultFlag G Source Qual M HIP
Theta Rho HD 97907 BD BD+14 2367
CD CP Dm number +14 2367 VIred 1.2
SpType K3III R SpType Coord arcsec 2000 111551.90+131827.3
Hipparcos 2
HIP 55016 Sn 1 So 1 Nc 1
RArad 2.9490171634 DErad 0.2322613143 Plx 8.44 PmRA 4.77
PmDE -7.63 E RArad 0.63 E DErad 0.47 E Plx 0.71
E pmRA 0.76 E pmDE 0.53 Hpmag 5.469 E Hpmag 0.001
SHp 0.006 VA 0 BV 1.189 E BV 0.001
VI 1.2
 
 
11159+1318 B
 
 
Componente originario normalizzato AB Coord arcsec 2000 111551.90+131827.3 Mag 7.3 Spectral class A7V (white)
Calc delta mag 1.8 Calc coord yes