08122+1739 STF 1196 AB (Tegmine)

 
 
08h 12m 12.79s +17° 38' 51.2" P.A. 349.00 sep 1.1 mag 5.30,6.25 Sp F8V dist. 25.08 pc (81.81 l.y.)
 
 
Coord 2000 08122+1739 Discov num STF1196 Comp AB Coord arcsec 2000 08 12 12.79 +17 38 51.2
Date first 1825 Date last 2025 Obs 1244
Pa first 58 Pa last 349.4 P.A. Now (θ) 348.6° (calc)
Sep first 1.1 Sep last 1.06 Sep. Now (ρ) 1.108" (calc)
Mag pri 5.30 Mag sec 6.25 delta mag (ΔM) 0.95 Spectral class F8V (yellow-white)
Pri motion ra +080 Sec motion ra +080
Pri motion dec -129 Sec motion dec -129
Notes N O (See Notes, Orbital solution)
This double is physical.
 
 
08122+1739 SYSTEM COMPONENTS
 
 
Show name SAO coord wds_name last obs pa sep mag1 mag2 d_mag orb current
Show Tegmine 97645 08 12 13 +17 38 51 STF 1196 AB 2025 1244 349 1.1 5.30 6.25 0.95 Y <===
Show Zet2 Cnc 97645 08 12 13 +17 38 51 STF 1196 AB,C 2025 576 57 6.3 4.92 5.85 0.93 Y
Show Tegmine 97645 08 12 13 +17 38 51 STF 1196 AC 2022 650 61 6.2 5.30 5.85 0.55
Show 97645 08 12 13 +17 38 51 STF 1196 AB,D 2017 21 107 275.9 4.92 8.89 3.97
Show 97645 08 12 13 +17 38 51 ENH 1 AB,E 2007 5 26 562.2 4.92 10.08 5.16
Show 97645 08 12 13 +17 38 51 ENH 1 AB,F 2007 5 46 638.1 4.92 10.26 5.34
Show 97645 08 12 13 +17 38 51 ENH 1 AB,G 2007 5 332 672.3 4.92 10.15 5.23
Show 97645 08 12 13 +17 38 52 STF 1196 BC 2020 190 70 5.5 6.25 5.85 0.40
Show 97645 08 12 13 +17 38 52 HUT 1 Ca,Cb 2022 22 338 0.3 6.20 7.10 0.90 Y
Show 97645 08 12 13 +17 38 52 OCC 9141 Ca,Cc 1998 0 -1 0.1 5.20 7.00 1.80
Show 97646 08 12 13 +17 38 52 STF 1196 CD 2000 7 107 277.5 5.85 8.89 3.04
Show 08 12 30 +17 47 14 ENH 1 EF 2015 12 106 218.7 10.08 10.26 0.18
Ninefold system
8 estimated visually detectable stars in this system
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Common name Tegmine Constellation Cancer SAO 97645 HIP 40167
Tycho2 1381-01638-1 Gaia DR2 657244521593509376 HD 68255 HR 3208
GC 11142 ADS 6650 BD BD+18 1867 Bayer Zeta 2 Cancri
Bayer name Zet2 Cnc Flamsteed 16 Cancri Flamsteed name 16 Cnc Distance 25.08
Distance ly 81.81 Bayer greek ζ2 Cnc
 
 
ORBITAL ELEMENTS
 
 
Period (P)59.8y± 0.035 Periastron (T)1989.92y± 0.008 Semi-major axis (a)0.866a± 0.001
Eccentricity (e)0.32± 0 Inclination (i)170.9°± 0.3 Longitude of periastron (ω)0.8°± 2
Node (Ω)189.8°± 2 Notesn ReferenceUSN2021a
Equinox Last observation2020 Grade1(1=Definitive, 9=Indet.)
label theta rho
2000 91.3 0.802
2001 85.0 0.832
2002 79.1 0.861
2003 73.6 0.890
2004 68.4 0.918
2005 63.6 0.945
2006 59.0 0.970
2007 54.6 0.994
2008 50.4 1.016
2009 46.4 1.036
2010 42.5 1.055
2011 38.8 1.072
2012 35.2 1.087
2013 31.6 1.100
2014 28.2 1.112
2015 24.8 1.122
2016 21.5 1.130
2017 18.2 1.136
2018 14.9 1.140
2019 11.7 1.143
2020 8.4 1.143
2021 5.2 1.142
2022 1.9 1.139
2023 358.7 1.134
2024 355.4 1.127
2025 352.0 1.118
2026 348.6 1.108
2027 345.1 1.095
2028 341.6 1.081
2029 337.9 1.066
2030 334.1 1.048
2031 330.2 1.029
2032 326.1 1.007
2033 321.9 0.985
2034 317.4 0.961
2035 312.7 0.935
2036 307.7 0.908
2037 302.4 0.880
2038 296.8 0.851
2039 290.8 0.821
2040 284.2 0.790
2041 277.2 0.760
2042 269.6 0.730
2043 261.4 0.701
2044 252.4 0.674
2045 242.8 0.649
2046 232.4 0.628
2047 221.4 0.610
2048 209.8 0.598
2049 197.8 0.590
2050 185.6 0.589


 
 grafico orbita
Note: Theta is PA, Rho is Sep. For yearly orbits, data refer to Jan 1st.
wds08122%2B1739l.png orbit plot
Measures: green=micrometric, blue=interferometric, purple=photographic