16212-2536 H 4 121 AB (Alniyat)
16h 21m 11.32s -25° 35' 33.9" P.A. 269.00 sep 20.5 mag 2.89,8.42 Sp B0III+B8V dist. 213.68 pc (697.02 l.y.)
| Coord 2000 |
16212-2536 |
|
Discov num |
H 4 121 |
|
Comp |
AB |
|
Coord arcsec 2000 |
16 21 11.32 -25 35 33.9 |
|
| Date first |
1783 |
|
Date last |
2019 |
|
Obs |
45 |
|
| Pa first |
270 |
|
Pa last |
269 |
|
P.A. Now (θ) |
269° |
|
| Sep first |
21.7 |
|
Sep last |
20.481 |
|
Sep. Now (ρ) |
20.481" |
|
| Mag pri |
2.89 |
|
Mag sec |
8.42 |
|
delta mag (ΔM) |
5.53 |
|
Spectral class |
B0III+B8V (blue-white/blue-white) |
|
| Pri motion ra |
-010 |
|
Sec motion ra |
|
|
| Pri motion dec |
-021 |
|
Sec motion dec |
|
|
| Notes |
N
(See Notes) |
|
Nature of this double is uncertain.
16212-2536 SYSTEM COMPONENTS
| Show |
name |
SAO |
coord |
wds_name |
last |
obs |
pa |
sep |
mag1 |
mag2 |
d_mag |
orb |
current |
| Show |
|
184336 |
16 21 11 -25 35 34 |
NOR 1 Aa1,2 |
2010 |
1 |
89 |
0.0 |
3.30 |
4.10 |
0.80 |
Y |
|
| Show |
|
184336 |
16 21 11 -25 35 34 |
BLM 4 Aa,Ab |
2019 |
28 |
217 |
0.4 |
3.06 |
5.24 |
2.18 |
|
|
| Show |
Alniyat |
184336 |
16 21 11 -25 35 34 |
H 4 121 AB |
2019 |
45 |
269 |
20.5 |
2.89 |
8.42 |
5.53 |
|
<=== |
Quadruple system
2 estimated visually detectable stars in this system
OTHER CATALOGS AND DESIGNATIONS
| Common name |
Alniyat |
|
Constellation |
Scorpius |
|
SAO |
184336 |
|
HIP |
80112 |
|
| Tycho2 |
6798-00540-1 |
|
Gaia DR2 |
6048602103659567488 |
|
HD |
147165 |
|
HR |
6084 |
|
| GC |
21982 |
|
ADS |
10009 |
|
CD |
CD-2511485 |
|
CP |
CP-25 5785 |
|
| Bayer |
Sigma Scorpii |
|
Bayer name |
Sig Sco |
|
Flamsteed |
20 Scorpii |
|
Flamsteed name |
20 Sco |
|
| FK5 |
607 |
|
Distance |
213.68 |
|
Distance ly |
697.02 |
|
Bayer greek |
σ Sco |
|
| Meaning |
support / shield of the heart |
|