18055+0311 HEI 257
18h 05m 27.30s +03° 11' 27.1" P.A. 331.00 sep 1.7 mag 10.30,11.50
| Coord 2000 |
18055+0311 |
|
Discov num |
HEI 257 |
|
Comp |
|
|
Coord arcsec 2000 |
18 05 27.30 +03 11 27.1 |
|
| Date first |
1984 |
|
Date last |
2015 |
|
Obs |
7 |
|
| Pa first |
333 |
|
Pa last |
330.9 |
|
P.A. Now (θ) |
330.9° |
|
| Sep first |
1.9 |
|
Sep last |
1.7 |
|
Sep. Now (ρ) |
1.7" |
|
| Mag pri |
10.30 |
|
Mag sec |
11.50 |
|
delta mag (ΔM) |
1.2 |
|
Spectral class |
|
|
| Pri motion ra |
+020 |
|
Sec motion ra |
|
|
| Pri motion dec |
-027 |
|
Sec motion dec |
|
|
| Notes |
|
|
Nature of this double is uncertain.
OTHER CATALOGS AND DESIGNATIONS
| Constellation |
Ophiuchus |
|
Tycho2 |
0434-00465-1 |
|
Gaia DR2 |
4468669276831931648 |
|
