18512+5923 STF 2420 BC
18h 51m 08.98s +59° 23' 45.8" P.A. 326.00 sep 103.5 mag 8.26,12.67 Sp K3IIIp
Coord 2000 |
18512+5923 |
|
Discov num |
STF2420 |
|
Comp |
BC |
|
Coord arcsec 2000 |
18 51 08.98 +59 23 45.8 |
|
Date first |
1880 |
|
Date last |
2015 |
|
Obs |
9 |
|
Pa first |
327 |
|
Pa last |
326.2 |
|
P.A. Now (θ) |
326.2° |
|
Sep first |
107.8 |
|
Sep last |
103.462 |
|
Sep. Now (ρ) |
103.462" |
|
Mag pri |
8.26 |
|
Mag sec |
12.67 |
|
delta mag (ΔM) |
4.41 |
|
Spectral class |
K3IIIp (yellow-orange) |
|
Pri motion ra |
|
|
Sec motion ra |
-000 |
|
Pri motion dec |
|
|
Sec motion dec |
-003 |
|
Notes |
N
(See Notes) |
|
Nature of this double is uncertain.
18512+5923 SYSTEM COMPONENTS
Show |
name |
SAO |
coord |
wds_name |
last |
obs |
pa |
sep |
mag1 |
mag2 |
d_mag |
orb |
current |
Show |
|
31218 |
18 51 12 +59 23 18 |
CIA 8 Aa,Ab |
2014 |
6 |
202 |
0.0 |
4.77 |
11.00 |
6.23 |
Y |
|
Show |
Omi Dra |
31218 |
18 51 12 +59 23 18 |
STF 2420 AB |
2019 |
94 |
316 |
37.6 |
4.77 |
8.26 |
3.49 |
|
|
Show |
|
31218 |
18 51 12 +59 23 18 |
STF 2420 AC |
2014 |
4 |
324 |
141.3 |
4.77 |
12.67 |
7.90 |
|
|
Show |
|
|
18 51 09 +59 23 46 |
STF 2420 BC |
2015 |
9 |
326 |
103.5 |
8.26 |
12.67 |
4.41 |
|
<=== |
Quadruple system
3 estimated visually detectable stars in this system
OTHER CATALOGS AND DESIGNATIONS
Constellation |
Draco |
|
Gaia DR2 |
2156134949085645184 |
|
WDS 18512+5923 STF 2420 BC : NOTES
discov_num |
notes |
refcode |
STF2420 |
omi Dra = 47 Dra. A is a spectroscopic binary and also variable. |
|
|
AB: Optical pair, based on study of relative motion of the components |
|
|
using the method of apparent motion parameters. |
Kiy2008 |
|
AB: H 4 20. |
MEv2010 |
omi Dra |
Hipparcos astrometric solution adopted some elements from the orbit of |
HIP1997d |
|
Young (1920). |
YRK1920 |
|
Ren & Fu (2013) calculated an astrometric orbit, combining Hipparcos |
Ren2013 |
|
Intermediate Astrometric Data with spectroscopic elements by |
|
|
Young (1920). |
YRK1920 |
CIA 8 |
Aa,Ab: Roettenbacher et al. (2015) resolve the RS CVn binary omi Dra |
|
|
and determined a combined spectroscopic/astrometric orbit. The orbital |
|
|
parallax is 9.36 +/- 0.10 mas (106.8 +/- 1.1pc), flux ratio in H is |
|
|
370 +/- 40, the system age 3.0 +/- 0.5 Gyr. Radii are 25.1 +/- 0.3 and |
|
|
1.0 +/- 0.1 Rsun, luminosities 220 +/- 30 and 1.3 +/- 0.2 Lsun. |
|
|
Derived masses are 1.35 +/- 0.05 and 0.99 +/- 0.02 Msun. |
CIA2015c |
REFERENCES
refcode |
metd |
author |
reference |
CIA2015c |
Kc j |
Roettenbacher, R.M., Monnier, J., Fekel, F.C., Henry, G.W., Korhonen, H., |
2015ApJ...809..159R |
CIA2015c |
|
Latham, D.W., Muterspaugh, M.W., Williamson, M.H., Baron, F., |
|
CIA2015c |
|
ten Brummelaar, T.A., Che, X., Harmon, R.O., et al. |
|
CIA2015c |
|
ApJ 809, 159, 2015 |
|
HIP1997d |
orb - |
Hipparcos |
1997yCat.1239....0E |
HIP1997d |
|
Hipparcos Catalog, ESA SP-1200, 1997 |
|
HIP1997d |
|
(DMSA/O Orbital Solutions) |
|
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) |
|
Ren2013 |
orb - |
Ren, S. & Fu, Y. |
2013AJ....145...81R |
Ren2013 |
|
AJ 145, 81, 2013 |
|
YRK1920 |
orb - |
Young, R.K. |
1920PDAO....1..263Y |
YRK1920 |
|
Pub. Dom. Astr. Obs. 1, 263, 1920 |
|
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 |
18512+5923 |
STF2420 |
BC |
2000 |
3 |
326 |
104.0 |
8.26 |
12.70 |
|
|
185112.01+592317.8 |
18512+5923 |
STF2420 |
BC |
2003 |
5 |
326 |
103.9 |
8.26 |
12.67 |
|
N |
185108.98+592345.8 |
18512+5923 |
STF2420 |
BC |
2015 |
6 |
326 |
103.5 |
8.26 |
12.67 |
K3IIIp |
N |
185108.98+592345.8 |
If you need more information about this double, apply for a
data request form to the WDS.
WDS 18512+5923 STF 2420 BC : VISUAL OBSERVATIONS REPORTS
No records found.
WDS 18512+5923 STF 2420 BC : MEASURES
No records found.
WDS 18512+5923 : 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 18512+5923 : ALADIN DSS IMAGE @ 18h 51m 08.98s +59° 23' 45.8"
WDS 18512+5923 STF 2420 BC : NEIGHBORHOODS
|
Click on the map to see the double of your interest.
Pass over with the mouse cursor to display the catalog designation.
|
Show |
name |
coord_2000 |
discov# |
comp |
pa |
sep |
dist(') |
Show |
|
18512+5923 |
STF2420 |
BC |
326 |
103.5 |
|
Show |
|
18512+5923 |
STF2420 |
AB |
316 |
37.6 |
1 |
Show |
|
18512+5923 |
STF2420 |
AC |
324 |
141.3 |
1 |
Show |
|
18512+5923 |
CIA 8 |
Aa,Ab |
202 |
0.0 |
1 |
Show |
|
18524+5938 |
STI 867 |
|
220 |
6.1 |
18 |
Show |
|
18519+5948 |
STI 865 |
|
179 |
3.7 |
26 |
Show |
|
18520+5951 |
STI 866 |
|
274 |
3.8 |
29 |
Show |
|
18469+5920 |
STF2410 |
|
85 |
1.7 |
33 |
Show |
|
18545+5946 |
TOI1307 |
|
35 |
0.3 |
34 |
Show |
|
18459+5924 |
MLB1079 |
AB |
203 |
34.1 |
41 |
Show |
|
18459+5924 |
MLB1079 |
BC |
279 |
7.4 |
41 |
Show |
|
18527+5842 |
HDS2678 |
|
214 |
0.7 |
44 |
Show |
|
18537+6005 |
TDT1117 |
|
44 |
2.0 |
46 |
Show |
|
18449+5916 |
UC 3661 |
|
240 |
24.1 |
49 |
Show |
|
18564+5854 |
TDS 955 |
|
149 |
0.9 |
50 |
Show |
|
18593+5929 |
TDT1168 |
|
250 |
1.9 |
63 |
Show |
|
18478+5826 |
STI2387 |
|
84 |
12.4 |
65 |
Show |
|
18428+5938 |
STF2398 |
BC |
157 |
202.7 |
66 |
Show |
|
18428+5938 |
STF2398 |
AB |
181 |
11.4 |
66 |
Show |
|
18428+5938 |
POP1224 |
AD |
110 |
100.0 |
66 |
Show |
|
18428+5938 |
STF2398 |
AC |
158 |
216.8 |
66 |
Show |
|
18549+5823 |
STI2397 |
|
235 |
14.4 |
68 |
Show |
|
18437+6005 |
STI 859 |
|
165 |
11.9 |
70 |
Show |
|
18530+5816 |
ES 1746 |
|
114 |
1.8 |
71 |
Show |
|
18585+6012 |
LDS2754 |
|
73 |
18.4 |
74 |
Show |
|
18494+5811 |
STI2392 |
|
142 |
5.3 |
74 |
Show |
|
18432+5840 |
TDT1017 |
|
223 |
0.5 |
76 |
Show |
|
18483+6044 |
LDS2751 |
|
152 |
7.6 |
83 |
Show |
|
18414+5849 |
STI2381 |
|
139 |
8.7 |
83 |
Show |
|
18401+5922 |
UC 3633 |
|
276 |
49.7 |
85 |
Show |
|
18459+6040 |
TDT1041 |
|
7 |
2.5 |
86 |
Show |
|
18575+5814 |
STF2438 |
|
356 |
0.8 |
86 |
Show |
|
19030+5920 |
STI 871 |
|
149 |
9.2 |
91 |
Show |
|
18392+5925 |
TDT 975 |
|
42 |
0.6 |
92 |
Show |
|
19029+5949 |
LDS2756 |
|
287 |
12.5 |
92 |
Show |
|
18439+6039 |
ES 189 |
AB |
107 |
3.3 |
93 |
Show |
|
18483+5752 |
STI2390 |
BC |
85 |
2.9 |
95 |
Show |
|
18483+5752 |
STI2390 |
AC |
100 |
5.1 |
95 |
Show |
|
18483+5752 |
GAT 3 |
AB |
117 |
2.3 |
95 |
Show |
|
18449+5759 |
STI2385 |
|
143 |
12.4 |
98 |
Show |
|
18552+5750 |
HJ 2848 |
AB |
289 |
6.5 |
100 |
Show |
|
18552+5750 |
HJ 2848 |
AC |
52 |
30.0 |
100 |
Show |
|
19044+5911 |
TDT1210 |
|
327 |
0.8 |
102 |
Show |
|
19017+6028 |
MLB 139 |
AB |
126 |
5.2 |
104 |
Show |
|
19017+6028 |
MLB 139 |
AC |
268 |
35.8 |
104 |
Show |
|
18416+6047 |
STI 857 |
|
176 |
4.5 |
110 |
Show |
|
18399+5815 |
A 251 |
AB |
53 |
4.0 |
112 |
Show |
|
18399+5815 |
A 251 |
AC |
78 |
13.5 |
112 |
Show |
|
18480+6113 |
LDS2750 |
|
136 |
2.2 |
112 |
Show |
|
18443+6103 |
STF2403 |
|
278 |
1.1 |
112 |
Show |
|
18417+6051 |
STI 858 |
|
10 |
4.2 |
113 |
|
|
WDS 18512+5923 : COMPONENTS
|
A |
Ab |
B |
Ab |
pa=191.6°
sep=0.01"
| |
B |
pa=320.4°
sep=36.33"
| pa=320.4°
sep=36.33"
| |
C |
pa=339.5°
sep=121.55"
| pa=339.5°
sep=121.55"
| pa=347.2°
sep=88.02"
|
18512+5923 A
Name |
Omi Dra |
|
Coord arcsec 2000 |
185112.01+592317.8 |
|
Mag |
4.77 |
|
Spectral class |
G7III (yellow) |
|
PmRA |
78.00 |
|
PmDE |
25.0 |
|
SAO |
31218 |
|
HIP |
92512 |
|
Tycho2 |
3930-01790-1 |
|
HD |
175306 |
|
HR |
7125 |
|
GC |
25905 |
|
BD |
BD+59 1925 |
|
Bayer |
Omicron Draconis |
|
Bayer name |
Omi Dra |
|
Flamsteed |
47 Draconis |
|
Flamsteed name |
47 Dra |
|
FK5 |
707 |
|
Tycho2 |
3930-01790-1 |
|
Pflag |
|
|
RAmdeg |
282.80040920 |
|
DEmdeg |
59.38834934 |
|
PmRA |
79.4 |
|
PmDE |
24.8 |
|
E RAmdeg |
3 |
|
E DEmdeg |
3 |
|
E pmRA |
0.6 |
|
E pmDE |
0.8 |
|
EpRAm |
1991.21 |
|
EpDEm |
1991.35 |
|
Num |
18 |
|
Q RAmdeg |
1.3 |
|
Q DEmdeg |
1.7 |
|
Q pmRA |
1.2 |
|
Q pmDE |
1.5 |
|
BTmag |
6.129 |
|
E BTmag |
0.014 |
|
VTmag |
4.765 |
|
E VTmag |
0.009 |
|
Prox |
363 |
|
TYC |
T |
|
HIP |
92512 |
|
CCDM |
|
|
RAdeg |
282.80004778 |
|
DEdeg |
59.38829139 |
|
EpRA 1990 |
1.66 |
|
EpDE 1990 |
1.64 |
|
E RAdeg |
3.4 |
|
E DEdeg |
3.4 |
|
Posflg |
|
|
Corr |
0.0 |
|
SAO |
31218 |
|
DelFlag |
|
|
RA1950 |
|
|
PmRA1950 |
0.0095 |
|
DE1950 |
|
|
PmDE1950 |
0.027 |
|
Vmag |
4.9 |
|
SpType |
K0 |
|
Double code |
|
|
Source |
74 |
|
CatNum |
707 |
|
DM |
BD+59 1925 |
|
DMcomp |
A |
|
BDsup |
|
|
HD |
175306 |
|
M HD |
0 |
|
GC |
25905 |
|
RA1950rad |
4.93257513 |
|
DE1950rad |
1.0354474 |
|
PmRA2000 |
0.0102 |
|
PmDE2000 |
0.027 |
|
Catalog |
H |
|
HIP |
92512 |
|
Proxy |
|
|
RAhms |
18 51 12.01 |
|
DEdms |
+59 23 17.8 |
|
Vmag |
4.63 |
|
VarFlag |
1 |
|
R Vmag |
H |
|
RAdeg |
282.8 |
|
DEdeg |
59.3883 |
|
AstroRef |
+ |
|
Plx |
10.12 |
|
CCDM |
18512+5924 |
|
N CCDM |
I |
|
Nsys |
1 |
|
Ncomp |
1 |
|
MultFlag |
O |
|
Source |
|
|
Qual |
|
|
M HIP |
|
|
Theta |
|
|
Rho |
|
|
HD |
175306 |
|
BD |
BD+59 1925 |
|
CD |
|
|
CP |
|
|
Dm number |
+59 1925 |
|
VIred |
1.2 |
|
SpType |
K0II-III SB |
|
R SpType |
|
|
Coord arcsec 2000 |
185112.01+592317.8 |
|
HIP |
92512 |
|
Sn |
75 |
|
So |
4 |
|
Nc |
1 |
|
RArad |
4.9357916014 |
|
DErad |
1.0365211815 |
|
Plx |
9.54 |
|
PmRA |
77.47 |
|
PmDE |
25.37 |
|
E RArad |
0.2 |
|
E DErad |
0.21 |
|
E Plx |
0.21 |
|
E pmRA |
0.24 |
|
E pmDE |
0.28 |
|
Hpmag |
4.7911 |
|
E Hpmag |
0.0009 |
|
SHp |
0.011 |
|
VA |
1 |
|
BV |
1.185 |
|
E BV |
0.013 |
|
VI |
1.2 |
|
18512+5923 Ab
Coord arcsec 2000 |
185112.01+592317.8 |
|
Mag |
11 |
|
Spectral class |
IV |
|
Calc delta mag |
6.23 |
|
Calc coord |
yes |
|
18512+5923 B
Coord arcsec 2000 |
185108.98+592345.8 |
|
Coord calc |
185108.98+592345.8 |
|
Mag |
8.26 |
|
Spectral class |
K3IIIp (yellow-orange) |
|
Calc delta mag |
3.49 |
|
18512+5923 C
Coord arcsec 2000 |
185106.43+592511.7 |
|
Mag |
12.67 |
|
Spectral class |
IV |
|
PmRA |
0.00 |
|
PmDE |
-3.0 |
|
Calc delta mag |
7.9 |
|
Calc coord |
yes |
|