13100+1732 STF 1728 AB (Diadem)
13h 09m 59.28s +17° 31' 46.0" P.A. 192.00 sep 0.4 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 |
2021 |
|
Obs |
669 |
|
| Pa first |
190 |
|
Pa last |
192.1 |
|
P.A. Now (θ) |
355.2° (calc) |
|
| Sep first |
0.6 |
|
Sep last |
0.402 |
|
Sep. Now (ρ) |
0.003" (calc) |
|
| 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 |
2021 |
669 |
192 |
0.4 |
4.85 |
5.53 |
0.68 |
Y |
<=== |
| Show |
Alp Com |
100443 |
13 09 59 +17 31 46 |
STF 1728 AB,C |
2023 |
15 |
353 |
82.9 |
4.43 |
11.45 |
7.02 |
|
|
Triple system
2 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 |
|
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 |
|
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) | 280.563° | ± 0.026 |
| Node (Ω) | 12.2272° | ± 0.0098 |
Notes | n | |
Reference | Mut2015 | |
| Equinox | 2000 | |
Last observation | 2015 | |
Grade | 1 | (1=Definitive, 9=Indet.) |
| label |
theta |
rho |
| 2000 |
9.3 |
0.017 |
| 2001 |
192.9 |
0.078 |
| 2002 |
192.5 |
0.171 |
| 2003 |
192.4 |
0.261 |
| 2004 |
192.4 |
0.346 |
| 2005 |
192.3 |
0.426 |
| 2006 |
192.3 |
0.497 |
| 2007 |
192.3 |
0.558 |
| 2008 |
192.3 |
0.605 |
| 2009 |
192.3 |
0.635 |
| 2010 |
192.3 |
0.643 |
| 2011 |
192.2 |
0.621 |
| 2012 |
192.2 |
0.558 |
| 2013 |
192.2 |
0.437 |
| 2014 |
192.2 |
0.238 |
| 2015 |
12.7 |
0.034 |
| 2016 |
12.3 |
0.288 |
| 2017 |
12.2 |
0.443 |
| 2018 |
12.2 |
0.509 |
| 2019 |
12.2 |
0.515 |
| 2020 |
12.2 |
0.484 |
| 2021 |
12.2 |
0.430 |
| 2022 |
12.1 |
0.359 |
| 2023 |
12.1 |
0.278 |
| 2024 |
12.0 |
0.189 |
| 2025 |
11.7 |
0.097 |
| 2026 |
355.4 |
0.003 |
| 2027 |
192.8 |
0.091 |
| 2028 |
192.5 |
0.184 |
| 2029 |
192.4 |
0.274 |
| 2030 |
192.4 |
0.358 |
| 2031 |
192.3 |
0.437 |
| 2032 |
192.3 |
0.507 |
| 2033 |
192.3 |
0.565 |
| 2034 |
192.3 |
0.611 |
| 2035 |
192.3 |
0.638 |
| 2036 |
192.3 |
0.642 |
| 2037 |
192.2 |
0.615 |
| 2038 |
192.2 |
0.544 |
| 2039 |
192.2 |
0.413 |
| 2040 |
192.2 |
0.201 |
| 2041 |
12.4 |
0.075 |
| 2042 |
12.3 |
0.318 |
| 2043 |
12.2 |
0.458 |
| 2044 |
12.2 |
0.513 |
| 2045 |
12.2 |
0.512 |
| 2046 |
12.2 |
0.478 |
| 2047 |
12.1 |
0.420 |
| 2048 |
12.1 |
0.347 |
| 2049 |
12.1 |
0.265 |
| 2050 |
12.0 |
0.176 |
|
|
Note: Theta is PA, Rho is Sep. For yearly orbits, data refer to Jan 1st.
Measures: green=micrometric, blue=interferometric, purple=photographic
|
|
