18176-3646 BU 760 AC
18h 17m 37.73s -36° 45' 40.6" P.A. 320.00 sep 28.3 mag 3.30,13.10 Sp M3.5III dist. 44.74 pc (145.94 l.y.)
Coord 2000 |
18176-3646 |
|
Discov num |
BU 760 |
|
Comp |
AC |
|
Coord arcsec 2000 |
18 17 37.73 -36 45 40.6 |
|
Date first |
1896 |
|
Date last |
2008 |
|
Obs |
4 |
|
Pa first |
276 |
|
Pa last |
319.8 |
|
P.A. Now (θ) |
319.8° |
|
Sep first |
33.3 |
|
Sep last |
28.28 |
|
Sep. Now (ρ) |
28.28" |
|
Mag pri |
3.30 |
|
Mag sec |
13.10 |
|
delta mag (ΔM) |
9.8 |
|
Spectral class |
M3.5III (red) |
|
Pri motion ra |
-128 |
|
Sec motion ra |
|
|
Pri motion dec |
-167 |
|
Sec motion dec |
|
|
Notes |
N
(See Notes) |
|
Nature of this double is uncertain.
18176-3646 SYSTEM COMPONENTS
Show |
name |
SAO |
coord |
wds_name |
last |
obs |
pa |
sep |
mag1 |
mag2 |
d_mag |
orb |
current |
Show |
Eta Sgr |
209957 |
18 17 38 -36 45 41 |
BU 760 AB |
2016 |
28 |
110 |
3.5 |
3.30 |
8.00 |
4.70 |
|
|
Show |
|
209957 |
18 17 38 -36 45 41 |
BU 760 AC |
2008 |
4 |
320 |
28.3 |
3.30 |
13.10 |
9.80 |
|
<=== |
Show |
|
209957 |
18 17 38 -36 45 41 |
BU 760 AD |
2010 |
15 |
318 |
93.8 |
3.30 |
10.04 |
6.74 |
|
|
Quadruple system
4 estimated visually detectable stars in this system
OTHER CATALOGS AND DESIGNATIONS
Constellation |
Sagittarius |
|
SAO |
209957 |
|
HIP |
89642 |
|
Tycho2 |
7404-07057-1 |
|
HD |
167618 |
|
HR |
6832 |
|
GC |
24944 |
|
CD |
CD-3612423 |
|
CP |
CP-36 8128 |
|
Bayer |
Eta Sagittarii |
|
Bayer name |
Eta Sgr |
|
FK5 |
683 |
|
Distance |
44.74 |
|
Distance ly |
145.94 |
|
Bayer greek |
η Sgr |
|