Coord 2000 | 18002+8000 | Discov num | STF2308 | Comp | AB | Coord arcsec 2000 | 18 00 09.07 +80 00 13.7 | ||||
Date first | 1782 | Date last | 2022 | Obs | 184 | ||||||
Pa first | 235 | Pa last | 232 | P.A. Now (θ) | 232° | ||||||
Sep first | 20.7 | Sep last | 18.9 | Sep. Now (ρ) | 18.9" | ||||||
Mag pri | 5.70 | Mag sec | 6.00 | delta mag (ΔM) | 0.3 | Spectral class | F7V+F7V (yellow-white/yellow-white) | ||||
Pri motion ra | +047 | Sec motion ra | +055 | ||||||||
Pri motion dec | +124 | Sec motion dec | +131 | ||||||||
Notes | N O V (See Notes, Orbital solution, Proper motion indicates physical) |
Show | name | SAO | coord | wds_name | last | obs | pa | sep | mag1 | mag2 | d_mag | orb | current |
Show | 8996 | 18 00 09 +80 00 14 | BAG 6 Aa,Ab | 2012 | 31 | 316 | 0.1 | 6.22 | 6.69 | 0.47 | Y | ||
Show | 41 Dra | 8996 | 18 00 09 +80 00 14 | STF 2308 AB | 2022 | 184 | 232 | 18.9 | 5.70 | 6.00 | 0.30 | Y | <=== |
Show | 8996 | 18 00 09 +80 00 14 | STF 2308 AC | 2017 | 17 | 129 | 225.3 | 5.70 | 8.34 | 2.64 |
Name | 41 Dra | Var name | NSV10205 Dra | Constellation | Draco | SAO | 8996 | ||||
HIP | 88136 | Tycho2 | 4578-01433-1 | Gaia DR2 | 2294405824838599808 | HD | 166866 | ||||
HR | 6810 | GC | 24669 | ADS | 11061 | BD | BD+79 571 | ||||
Flamsteed | 41 Draconis | Flamsteed name | 41 Dra | Distance | 63.53 | Distance ly | 207.23 |
Period (P) | 18000y | Periastron (T) | 3381y | Semi-major axis (a) | 24.74a | |||
Eccentricity (e) | 0.84 | Inclination (i) | 162° | Longitude of periastron (ω) | 138° | |||
Node (Ω) | 233° | Notes | n | Reference | Kis1996 | |||
Equinox | 2000 | Last observation | Grade | 5 | (1=Definitive, 9=Indet.) |
|
|
Note: Theta is PA, Rho is Sep. For yearly orbits, data refer to Jan 1st. |
|
||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
|
|
|
|
||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
|
|
Measures: green=micrometric, blue=interferometric, purple=photographic |
|