18284+4444 HDS 2616 (HD 170646)
18h 28m 25.85s +44° 44' 22.2" P.A. 62.00 sep 0.1 mag 9.24,10.33 Sp F0 dist. 193.42 pc (630.94 l.y.)
Coord 2000 |
18284+4444 |
|
Discov num |
HDS2616 |
|
Comp |
|
|
Coord arcsec 2000 |
18 28 25.85 +44 44 22.2 |
|
Date first |
1991 |
|
Date last |
2006 |
|
Obs |
2 |
|
Pa first |
78 |
|
Pa last |
61.5 |
|
P.A. Now (θ) |
61.5° |
|
Sep first |
0.1 |
|
Sep last |
0.117 |
|
Sep. Now (ρ) |
0.117" |
|
Mag pri |
9.24 |
|
Mag sec |
10.33 |
|
delta mag (ΔM) |
1.09 |
|
Spectral class |
F0 (yellow-white) |
|
Pri motion ra |
-013 |
|
Sec motion ra |
|
|
Pri motion dec |
+011 |
|
Sec motion dec |
|
|
Notes |
|
|
Nature of this double is uncertain.
OTHER CATALOGS AND DESIGNATIONS
Name |
HD 170646 |
|
Constellation |
Lyra |
|
SAO |
47522 |
|
HIP |
90540 |
|
Tycho2 |
3116-00254-1 |
|
Gaia DR2 |
2118116590072903040 |
|
HD |
170646 |
|
BD |
BD+44 2908 |
|
Distance |
193.42 |
|
Distance ly |
630.94 |
|