12281+4448 STF 1645 AB (HD 108574)
12h 28m 04.45s +44° 47' 39.5" P.A. 156.00 sep 9.8 mag 7.49,8.08 Sp F9V+KV dist. 43.61 pc (142.26 l.y.)
| Coord 2000 |
12281+4448 |
|
Discov num |
STF1645 |
|
Comp |
AB |
|
Coord arcsec 2000 |
12 28 04.45 +44 47 39.5 |
|
| Date first |
1791 |
|
Date last |
2017 |
|
Obs |
126 |
|
| Pa first |
151 |
|
Pa last |
156.4 |
|
P.A. Now (θ) |
156.4° |
|
| Sep first |
15.9 |
|
Sep last |
9.83 |
|
Sep. Now (ρ) |
9.83" |
|
| Mag pri |
7.49 |
|
Mag sec |
8.08 |
|
delta mag (ΔM) |
0.59 |
|
Spectral class |
F9V+KV (yellow-white/yellow-orange) |
|
| Pri motion ra |
-182 |
|
Sec motion ra |
-181 |
|
| Pri motion dec |
-004 |
|
Sec motion dec |
+000 |
|
| Notes |
N
O
W
T
(See Notes, Orbital solution, , Parallax indicates physical) |
|
rPM=0.023 (< 0.3, Physical double)
This double is physical.
OTHER CATALOGS AND DESIGNATIONS
| Name |
HD 108574 |
|
Constellation |
Canes Venatici |
|
SAO |
44187 |
|
HIP |
60831 |
|
| Tycho2 |
3020-02112-1 |
|
HD |
108574 |
|
GC |
16998 |
|
BD |
BD+45 2038 |
|
| Distance |
43.61 |
|
Distance ly |
142.26 |
|
ORBITAL ELEMENTS SOLUTION #1
| Period (P) | 3477y | ± 344 |
Periastron (T) | 3193y | ± 185 |
Semi-major axis (a) | 6.6a | ± 0.4 |
| Eccentricity (e) | 0.76 | ± 0.08 |
Inclination (i) | 134° | ± 10 |
Longitude of periastron (ω) | 204° | ± 10 |
| Node (Ω) | 184° | ± 10 |
Notes | n | |
Reference | Kiy2020 | |
| Equinox | | |
Last observation | | |
Grade | 5 | (1=Definitive, 9=Indet.) |
| label |
theta |
rho |
| 2000 |
156.9 |
9.777 |
| 2001 |
156.8 |
9.773 |
| 2002 |
156.8 |
9.769 |
| 2003 |
156.8 |
9.765 |
| 2004 |
156.8 |
9.761 |
| 2005 |
156.8 |
9.757 |
| 2006 |
156.7 |
9.753 |
| 2007 |
156.7 |
9.749 |
| 2008 |
156.7 |
9.745 |
| 2009 |
156.7 |
9.741 |
| 2010 |
156.6 |
9.737 |
| 2011 |
156.6 |
9.733 |
| 2012 |
156.6 |
9.729 |
| 2013 |
156.6 |
9.725 |
| 2014 |
156.6 |
9.721 |
| 2015 |
156.5 |
9.717 |
| 2016 |
156.5 |
9.713 |
| 2017 |
156.5 |
9.709 |
| 2018 |
156.5 |
9.704 |
| 2019 |
156.4 |
9.700 |
| 2020 |
156.4 |
9.696 |
| 2021 |
156.4 |
9.692 |
| 2022 |
156.4 |
9.688 |
| 2023 |
156.4 |
9.684 |
| 2024 |
156.3 |
9.680 |
| 2025 |
156.3 |
9.675 |
| 2026 |
156.3 |
9.671 |
| 2027 |
156.3 |
9.667 |
| 2028 |
156.3 |
9.663 |
| 2029 |
156.2 |
9.659 |
| 2030 |
156.2 |
9.655 |
|
|
Note: Theta is PA, Rho is Sep. For yearly orbits, data refer to Jan 1st.
|
|
|
|
|
|
|
|
Measures: green=micrometric, blue=interferometric, purple=photographic |
|
ORBITAL ELEMENTS SOLUTION #2
| Period (P) | 3477y | ± 344 |
Periastron (T) | 3017y | ± 92 |
Semi-major axis (a) | 6.6a | ± 0.4 |
| Eccentricity (e) | 0.87 | ± 0.02 |
Inclination (i) | 154° | ± 10 |
Longitude of periastron (ω) | 63° | ± 34 |
| Node (Ω) | 51° | ± 39 |
Notes | n | |
Reference | Kiy2020 | |
| Equinox | | |
Last observation | | |
Grade | 5 | (1=Definitive, 9=Indet.) |
| label |
theta |
rho |
| 2000 |
158.2 |
9.875 |
| 2001 |
158.2 |
9.871 |
| 2002 |
158.2 |
9.867 |
| 2003 |
158.2 |
9.863 |
| 2004 |
158.1 |
9.859 |
| 2005 |
158.1 |
9.855 |
| 2006 |
158.1 |
9.851 |
| 2007 |
158.1 |
9.847 |
| 2008 |
158.0 |
9.842 |
| 2009 |
158.0 |
9.838 |
| 2010 |
158.0 |
9.834 |
| 2011 |
158.0 |
9.830 |
| 2012 |
158.0 |
9.826 |
| 2013 |
157.9 |
9.822 |
| 2014 |
157.9 |
9.818 |
| 2015 |
157.9 |
9.814 |
| 2016 |
157.9 |
9.810 |
| 2017 |
157.9 |
9.806 |
| 2018 |
157.8 |
9.802 |
| 2019 |
157.8 |
9.798 |
| 2020 |
157.8 |
9.794 |
| 2021 |
157.8 |
9.790 |
| 2022 |
157.8 |
9.786 |
| 2023 |
157.7 |
9.781 |
| 2024 |
157.7 |
9.777 |
| 2025 |
157.7 |
9.773 |
| 2026 |
157.7 |
9.769 |
| 2027 |
157.7 |
9.765 |
| 2028 |
157.6 |
9.761 |
| 2029 |
157.6 |
9.757 |
| 2030 |
157.6 |
9.752 |
|
|
Note: Theta is PA, Rho is Sep. For yearly orbits, data refer to Jan 1st.
|
|
|
|
|
|
|
|
Measures: green=micrometric, blue=interferometric, purple=photographic |
|
