13100+1732 STF 1728 AB (Diadem)

 
 
13h 09m 59.28s +17° 31' 46.0" P.A. 195.00 sep 0.5 mag 4.85,5.53 Sp F5V+F6V dist. 17.83 pc (58.16 l.y.)
 
 
Coord 2000 13100+1732 Discov num STF1728 Comp AB Coord arcsec 2000 13 09 59.28 +17 31 46.0
Date first 1827 Date last 2020 Obs 664
Pa first 190 Pa last 194.6 P.A. Now (θ) 192.1°
Sep first 0.6 Sep last 0.46 Sep. Now (ρ) 0.278"
Mag pri 4.85 Mag sec 5.53 delta mag (ΔM) 0.68 Spectral class F5V+F6V (yellow-white/yellow-white)
Pri motion ra -433 Sec motion ra -430
Pri motion dec +141 Sec motion dec +138
Notes N O (See Notes, Orbital solution)
rPM=0.009 (< 0.3, Physical double)
This double is physical.
 
 
13100+1732 SYSTEM COMPONENTS
 
 
Show name SAO coord wds_name last obs pa sep mag1 mag2 d_mag orb current
Show Diadem 100443 13 09 59 +17 31 46 STF 1728 AB 2020 664 195 0.5 4.85 5.53 0.68 Y <===
Show Alp Com 100443 13 09 59 +17 31 46 STF 1728 AB,C 2014 14 349 84.8 4.43 11.45 7.02
Triple system
4 estimated visually detectable stars in this system
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Common name Diadem Var name NSV6116 Com Constellation Coma Berenices SAO 100443
HIP 64241 Tycho2 1454-01134-1 HD 114378 HR 4968
GC 17833 ADS 8804 GL Gl 501A BD BD+18 2697
Bayer Alpha Comae Berenices Bayer name Alp Com Flamsteed 42 Comae Berenices Flamsteed name 42 Com
Distance 17.83 Distance ly 58.16 Bayer greek α Com
Other names DIADEMA
Meaning tiara
 
 
ORBITAL ELEMENTS
 
 
Period (P)9442.4d (25.85y)± 3 Periastron (T)57056.84m (2015.094y)± 0.36 Semi-major axis (a)0.67144a± 0.00033
Eccentricity (e)0.5106± 0.00061 Inclination (i)90.0501°± 0.0062 Longitude of periastron (ω)100.563°± 0.026
Node (Ω)12.2272°± 0.0098 Notesn ReferenceMut2015
Equinox2000 Last observation2015 Grade1(1=Definitive, 9=Indet.)
label theta rho
2000 189.3 0.017
2001 12.9 0.078
2002 12.5 0.171
2003 12.4 0.261
2004 12.4 0.346
2005 12.3 0.426
2006 12.3 0.497
2007 12.3 0.558
2008 12.3 0.605
2009 12.3 0.635
2010 12.3 0.643
2011 12.2 0.621
2012 12.2 0.558
2013 12.2 0.437
2014 12.2 0.238
2015 192.7 0.034
2016 192.3 0.288
2017 192.2 0.443
2018 192.2 0.509
2019 192.2 0.515
2020 192.2 0.484
2021 192.2 0.430
2022 192.1 0.359
2023 192.1 0.278
2024 192.0 0.189
2025 191.7 0.097
2026 175.4 0.003
2027 12.8 0.091
2028 12.5 0.184
2029 12.4 0.274
2030 12.4 0.358


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



 
 


wds13100%2B1732c.png orbit plot
Measures: green=micrometric, blue=interferometric, purple=photographic