18208+7120 STT 353 AB,C
18h 20m 45.44s +71° 20' 15.8" P.A. 117.00 sep 72.5 mag 4.21,12.70 Sp B7V+B9V+ dist. 92.85 pc (302.88 l.y.)
| Coord 2000 |
18208+7120 |
|
Discov num |
STT 353 |
|
Comp |
AB,C |
|
Coord arcsec 2000 |
18 20 45.44 +71 20 15.8 |
|
| Date first |
1912 |
|
Date last |
2007 |
|
Obs |
5 |
|
| Pa first |
115 |
|
Pa last |
117 |
|
P.A. Now (θ) |
117° |
|
| Sep first |
70.8 |
|
Sep last |
72.5 |
|
Sep. Now (ρ) |
72.5" |
|
| Mag pri |
4.21 |
|
Mag sec |
12.70 |
|
delta mag (ΔM) |
8.49 |
|
Spectral class |
B7V+B9V+ (blue-white/blue-white) |
|
| Pri motion ra |
-006 |
|
Sec motion ra |
-006 |
|
| Pri motion dec |
+036 |
|
Sec motion dec |
-006 |
|
| Notes |
N
U
(See Notes, Proper motion indicates non-physical) |
|
rPM=1.151
This double is not physical.
18208+7120 SYSTEM COMPONENTS
| Show |
name |
SAO |
coord |
wds_name |
last |
obs |
pa |
sep |
mag1 |
mag2 |
d_mag |
orb |
current |
| Show |
Phi Dra |
9084 |
18 20 45 +71 20 16 |
STT 353 AB |
2021 |
95 |
262 |
0.5 |
4.46 |
5.90 |
1.44 |
Y |
|
| Show |
|
9084 |
18 20 45 +71 20 16 |
STT 353 AB,C |
2007 |
5 |
117 |
72.5 |
4.21 |
12.70 |
8.49 |
|
<=== |
Triple system
4 estimated visually detectable stars in this system
OTHER CATALOGS AND DESIGNATIONS
| Constellation |
Draco |
|
SAO |
9084 |
|
HIP |
89908 |
|
Tycho2 |
4437-01492-1 |
|
| HD |
170000 |
|
HR |
6920 |
|
GC |
25114 |
|
ADS |
11311 |
|
| BD |
BD+71 889 |
|
Bayer |
Phi Draconis |
|
Bayer name |
Phi Dra |
|
Distance |
92.85 |
|
| Distance ly |
302.88 |
|
Bayer greek |
φ Dra |
|
