17187+0157 LDS 991 AB
17h 18m 35.15s +01° 56' 53.1" P.A. 139.00 sep 13.0 mag 14.10,14.20 Sp DA3+M4
| Coord 2000 |
17187+0157 |
|
Discov num |
LDS 991 |
|
Comp |
AB |
|
Coord arcsec 2000 |
17 18 35.15 +01 56 53.1 |
|
| Date first |
1936 |
|
Date last |
2016 |
|
Obs |
13 |
|
| Pa first |
140 |
|
Pa last |
139.3 |
|
P.A. Now (θ) |
139.3° |
|
| Sep first |
13.0 |
|
Sep last |
12.989 |
|
Sep. Now (ρ) |
12.989" |
|
| Mag pri |
14.10 |
|
Mag sec |
14.20 |
|
delta mag (ΔM) |
0.1 |
|
Spectral class |
DA3+M4 (white dwarf/red) |
|
| Pri motion ra |
-436 |
|
Sec motion ra |
-448 |
|
| Pri motion dec |
-285 |
|
Sec motion dec |
-283 |
|
| Notes |
T
(Parallax indicates physical) |
|
rPM=0.023 (< 0.3, Physical double)
This double is physical.
17187+0157 SYSTEM COMPONENTS
| Show |
name |
SAO |
coord |
wds_name |
last |
obs |
pa |
sep |
mag1 |
mag2 |
d_mag |
orb |
current |
| Show |
|
|
17 18 35 +01 56 53 |
LDS 991 AB |
2016 |
13 |
139 |
13.0 |
14.10 |
14.20 |
0.10 |
|
<=== |
| Show |
|
|
17 18 36 +01 56 43 |
LDT 14 Ba,Bb |
2017 |
2 |
55 |
0.5 |
14.00 |
15.10 |
1.10 |
|
|
Triple system
2 estimated visually detectable stars in this system
OTHER CATALOGS AND DESIGNATIONS
