18444+2015 ALD 4 AD
18h 44m 35.48s +20° 23' 00.7" P.A. 332.00 sep 3.9 mag 11.70, Sp F2
| Coord 2000 |
18444+2015 |
|
Discov num |
ALD 4 |
|
Comp |
AD |
|
Coord arcsec 2000 |
18 44 35.48 +20 23 00.7 |
|
| Date first |
1997 |
|
Date last |
2016 |
|
Obs |
3 |
|
| Pa first |
339 |
|
Pa last |
331.7 |
|
P.A. Now (θ) |
331.7° |
|
| Sep first |
4.0 |
|
Sep last |
3.895 |
|
Sep. Now (ρ) |
3.895" |
|
| Mag pri |
11.70 |
|
Mag sec |
|
|
delta mag (ΔM) |
|
|
Spectral class |
F2 (yellow-white) |
|
| Pri motion ra |
+000 |
|
Sec motion ra |
|
|
| Pri motion dec |
-012 |
|
Sec motion dec |
|
|
| Notes |
|
|
Nature of this double is uncertain.
18444+2015 SYSTEM COMPONENTS
| Show |
name |
SAO |
coord |
wds_name |
last |
obs |
pa |
sep |
mag1 |
mag2 |
d_mag |
orb |
current |
| Show |
|
|
18 44 35 +20 23 01 |
ALD 4 Aa,Ab |
2016 |
2 |
225 |
0.7 |
11.70 |
12.40 |
0.70 |
|
|
| Show |
|
|
18 44 35 +20 23 01 |
ALD 4 AB |
2016 |
7 |
342 |
4.2 |
11.70 |
12.20 |
0.50 |
|
|
| Show |
|
|
18 44 35 +20 23 01 |
DAM 640 AC |
2016 |
5 |
168 |
11.0 |
11.70 |
13.40 |
1.70 |
|
|
| Show |
|
|
18 44 35 +20 23 01 |
ALD 4 AD |
2016 |
3 |
332 |
3.9 |
11.70 |
|
|
|
<=== |
Quintuple system
4 estimated visually detectable stars in this system
OTHER CATALOGS AND DESIGNATIONS
