20099+2055 STF 2637 AD
20h 09m 56.61s +20° 54' 53.2" P.A. 226.00 sep 172.8 mag 6.56,11.94 Sp F3V dist. 45.25 pc (147.61 l.y.)
Coord 2000 |
20099+2055 |
|
Discov num |
STF2637 |
|
Comp |
AD |
|
Coord arcsec 2000 |
20 09 56.61 +20 54 53.2 |
|
Date first |
1887 |
|
Date last |
2016 |
|
Obs |
10 |
|
Pa first |
229 |
|
Pa last |
226.3 |
|
P.A. Now (θ) |
226.3° |
|
Sep first |
158.0 |
|
Sep last |
172.8 |
|
Sep. Now (ρ) |
172.8" |
|
Mag pri |
6.56 |
|
Mag sec |
11.94 |
|
delta mag (ΔM) |
5.38 |
|
Spectral class |
F3V (yellow-white) |
|
Pri motion ra |
+059 |
|
Sec motion ra |
-005 |
|
Pri motion dec |
+098 |
|
Sec motion dec |
-003 |
|
Notes |
N
U
(See Notes, Proper motion indicates non-physical) |
|
rPM=1.045
This double is not physical.
20099+2055 SYSTEM COMPONENTS
Show |
name |
SAO |
coord |
wds_name |
last |
obs |
pa |
sep |
mag1 |
mag2 |
d_mag |
orb |
current |
Show |
The Sge |
88276 |
20 09 57 +20 54 53 |
STF 2637 AB |
2020 |
143 |
331 |
11.6 |
6.56 |
8.85 |
2.29 |
|
|
Show |
|
88276 |
20 09 57 +20 54 53 |
STF 2637 AC |
2020 |
97 |
222 |
91.9 |
6.56 |
7.52 |
0.96 |
|
|
Show |
|
88276 |
20 09 57 +20 54 53 |
STF 2637 AD |
2016 |
10 |
226 |
172.8 |
6.56 |
11.94 |
5.38 |
|
<=== |
Show |
|
88270 |
20 09 56 +20 55 04 |
STF 2637 BC |
2017 |
60 |
215 |
95.7 |
8.85 |
7.52 |
1.33 |
|
|
Quadruple system
4 estimated visually detectable stars in this system
OTHER CATALOGS AND DESIGNATIONS
Constellation |
Sagitta |
|
SAO |
88276 |
|
HIP |
99352 |
|
Tycho2 |
1630-00481-1 |
|
Gaia DR2 |
1829590548393010560 |
|
HD |
191570 |
|
HR |
7705 |
|
GC |
27987 |
|
ADS |
13442 |
|
BD |
BD+20 4453 |
|
Bayer |
Theta Sagittae |
|
Bayer name |
The Sge |
|
Flamsteed |
17 Sagittae |
|
Flamsteed name |
17 Sge |
|
Distance |
45.25 |
|
Distance ly |
147.61 |
|
Bayer greek |
θ Sge |
|
WDS 20099+2055 STF 2637 AD : NOTES
discov_num |
notes |
refcode |
STF2637 |
the Sge = 17 Sge. STTA201 = STFA 49. B is BD+20@4455. |
|
|
AC: Optical pair, based on study of relative motion of the components |
|
|
using the method of apparent motion parameters. |
Kiy2008 |
|
BC: Mt. Wilson spectral type of B is G3, C is K1. |
|
|
AB: HJL 272. |
HJL1986 |
|
AB: H 3 24. |
MEv2010 |
REFERENCES
refcode |
metd |
author |
reference |
HJL1986 |
Pa - |
Halbwachs, J.L. |
1986A&AS...66..131H |
HJL1986 |
|
A&AS 66, 131, 1986 |
|
HJL1986 |
|
(Possible CPM pairs from AGK2/3. Coarse astrometry, incl. mean 1950 dates, added |
|
HJL1986 |
|
only for previously unknown pairs. Table 1: HJL 1 - 326, Table 2: HJL1001 - 1113) |
|
Kiy2008 |
- |
Kiyaeva, O.V., Kiselev, A.A. & Izmailov, I.S. |
2008SvAL...32..405K |
Kiy2008 |
|
SvAL 34, 405, 2008 |
|
MEv2010 |
- |
MacEvoy, B. |
................... |
MEv2010 |
|
private communication, 2010 (see http://www.handprint.com/ASTRO/index.html) |
|
DISCOVERER
idgroup |
discov |
author |
1 |
STF |
Struve, F.G.W. |
WDS HISTORIC DATA
coord_2000 |
discov_num |
comp |
epoch |
obs |
pa |
sep |
mag_pri |
mag_sec |
spectr |
notes |
coord_arcsec_2000 |
20099+2055 |
STF2637 |
AD |
2000 |
7 |
227 |
170.6 |
6.56 |
|
F3V |
N D |
200956.61+205453.2 |
20099+2055 |
STF2637 |
AD |
2001 |
8 |
227 |
170.9 |
6.56 |
11.00 |
F3V |
N D |
200956.61+205453.2 |
20099+2055 |
STF2637 |
AD |
2016 |
9 |
226 |
172.8 |
6.56 |
11.94 |
F3V |
N |
200956.61+205453.2 |
If you need more information about this double, apply for a
data request form to the WDS.
WDS 20099+2055 STF 2637 AD : VISUAL OBSERVATIONS REPORTS
No records found.
WDS 20099+2055 STF 2637 AD : MEASURES
No records found.
WDS 20099+2055 : VIRTUAL EYEPIECE
Click on the map to see the double of your interest.
Pass over with the mouse cursor to display the catalog designation.
|
|
WDS 20099+2055 : ALADIN DSS IMAGE @
Error -22130
Not valid ID.
Error -22130
Not valid ID.
Error -27220
Not valid ID.