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Doubles in session


Current system
10116+1321
HU 874
34 Leo


Nearby doubles
12' : 10110+1328
AHD 36

36' : 10114+1246
SLW 443

54' : 10150+1300
SLW 451

55' : 10117+1416
LDS3962

58' : 10088+1401
BPMA 40

62' : 10095+1229
DAM2070

69' : 10102+1217
HEI 354

71' : 10138+1425
SLW 447

76' : 10096+1212
DAM2072

80' : 10106+1204
LDS3960

82' : 10171+1309
JMS 2AB

85' : 10143+1207
HDS1474

86' : 10157+1424
HJ 155

88' : 10085+1206
BRT1267

89' : 10086+1205
DAM2042

92' : 10130+1151
DAM2140

94' : 10115+1148
DAM2110

95' : 10174+1239
CVR 555

95' : 10071+1214
OSW 52

97' : 10084+1158
STFB 6AB
Regulus

97' : 10080+1201
DAM2032

97' : 10132+1147
HEI 355

103' : 10152+1153
HU 1254AB

103' : 10123+1143
J 2074AB

105' : 10139+1501
GWP1313

106' : 10160+1200
HJ 156AB



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.

10116+1321 HU 874 (34 Leo)

 
 
10h 11m 38.19s +13° 21' 18.7" P.A. 274.00 sep 0.0 mag 6.90,7.87 Sp F6V dist. 64.6 pc (210.73 l.y.)
 
 
Coord 2000 10116+1321 Discov num HU  874 Comp Coord arcsec 2000 10 11 38.19 +13 21 18.7
Date first 1905 Date last 2023 Obs 79
Pa first 289 Pa last 274.3 P.A. Now (θ) 281.6° (calc)
Sep first 0.2 Sep last 0.048 Sep. Now (ρ) 0.145" (calc)
Mag pri 6.90 Mag sec 7.87 delta mag (ΔM) 0.97 Spectral class F6V (yellow-white)
Pri motion ra +034 Sec motion ra
Pri motion dec -038 Sec motion dec
Notes N O (See Notes, Orbital solution)
This double is physical.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Name 34 Leo Constellation Leo SAO 98991 HIP 49929
Tycho2 0836-01522-1 Gaia DR2 3881744167420534528 HD 88355 HR 3998
GC 13999 ADS 7674 BD BD+14 2217 Flamsteed 34 Leonis
Flamsteed name 34 Leo Distance 64.6 Distance ly 210.73
 
 
ORBITAL ELEMENTS
 
 
Period (P)17.974y± 0.03 Periastron (T)2003.81y± 0.09 Semi-major axis (a)0.1528a± 0.0055
Eccentricity (e)0.928± 0.006 Inclination (i)82.4°± 0.8 Longitude of periastron (ω)317.9°± 2.6
Node (Ω)111.6°± 0.6 Notesn ReferenceTok2020e
Equinox Last observation Grade2(1=Definitive, 9=Indet.)
label theta rho
2000 287.3 0.198
2001 287.9 0.175
2002 288.8 0.142
2003 290.6 0.090
2004 131.4 0.012
2005 271.4 0.042
2006 277.8 0.083
2007 280.2 0.116
2008 281.6 0.144
2009 282.5 0.168
2010 283.3 0.187
2011 283.9 0.202
2012 284.4 0.214
2013 284.9 0.221
2014 285.3 0.226
2015 285.8 0.226
2016 286.3 0.221
2017 286.7 0.212
2018 287.3 0.197
2019 288.0 0.175
2020 288.9 0.141
2021 290.6 0.088
2022 136.0 0.011
2023 271.7 0.043
2024 277.9 0.084
2025 280.3 0.117
2026 281.6 0.145
2027 282.5 0.168
2028 283.3 0.187
2029 283.9 0.202
2030 284.4 0.214
2031 284.9 0.222
2032 285.4 0.226
2033 285.8 0.226
2034 286.3 0.221
2035 286.8 0.212
2036 287.3 0.197
2037 288.0 0.174
2038 288.9 0.140
2039 290.7 0.086
2040 141.4 0.010
2041 272.0 0.044
2042 278.0 0.085
2043 280.3 0.118
2044 281.6 0.146
2045 282.6 0.169
2046 283.3 0.188
2047 283.9 0.203
2048 284.4 0.214
2049 284.9 0.222
2050 285.4 0.226


 
 grafico orbita
Note: Theta is PA, Rho is Sep. For yearly orbits, data refer to Jan 1st.
wds10116%2B1321c.png orbit plot
Measures: green=micrometric, blue=interferometric, purple=photographic