08122+1739 STF 1196 AB (Tegmine)

 
 
08h 12m 12.79s +17 38' 51.2" P.A. 359.00 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 2022 Obs 1230
Pa first 58 Pa last 359.2 P.A. Now (θ) 354°
Sep first 1.1 Sep last 1.134 Sep. Now (ρ) 1.098"
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 2022 1230 359 1.1 5.30 6.25 0.95 Y <===
Show Zet2 Cnc 97646 08 12 13 +17 38 51 STF 1196 AB,C 2020 575 64 6.0 4.92 5.85 0.93 Y
Show Tegmine 97646 08 12 13 +17 38 51 STF 1196 AC 2022 643 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 187 70 5.5 6.25 5.85 0.40
Show 97646 08 12 13 +17 38 52 HUT 1 Ca,Cb 2021 21 344 0.3 6.20 7.10 0.90 Y
Show 97646 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)59.4252y± 0.0658 Periastron (T)1929.5282y± 0.0775 Semi-major axis (a)0.85272a± 0.00334
Eccentricity (e)0.31435± 0.00183 Inclination (i)173.574°± 2.66 Longitude of periastron (ω)239.232°± 26.195
Node (Ω)67.744°± 26.034 Notesn ReferenceIzm2019
Equinox Last observation2015 Grade1(1=Definitive, 9=Indet.)
label theta rho
2000 85.0 0.828
2001 79.2 0.857
2002 73.7 0.885
2003 68.6 0.912
2004 63.7 0.937
2005 59.1 0.960
2006 54.7 0.982
2007 50.5 1.003
2008 46.4 1.022
2009 42.5 1.039
2010 38.7 1.054
2011 35.0 1.068
2012 31.4 1.080
2013 27.9 1.090
2014 24.4 1.099
2015 21.0 1.105
2016 17.6 1.110
2017 14.2 1.114
2018 10.9 1.115
2019 7.6 1.115
2020 4.2 1.114
2021 0.9 1.110
2022 357.5 1.105
2023 354.0 1.098
2024 350.6 1.090
2025 347.0 1.079
2026 343.4 1.068
2027 339.7 1.054
2028 335.9 1.039
2029 332.0 1.022
2030 328.0 1.004


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



 
 


wds08122%2B1739h.png orbit plot
Measures: green=micrometric, blue=interferometric, purple=photographic