17491+5047 CHR 65 Aa,Ab (30 Dra)
17h 49m 04.33s +50° 46' 50.0" P.A. 112.00 sep 0.1 mag 5.02, Sp A2V dist. 66.53 pc (217.02 l.y.)
Coord 2000 |
17491+5047 |
|
Discov num |
CHR 65 |
|
Comp |
Aa,Ab |
|
Coord arcsec 2000 |
17 49 04.33 +50 46 50.0 |
|
Date first |
1985 |
|
Date last |
1985 |
|
Obs |
1 |
|
Pa first |
112 |
|
Pa last |
112.2 |
|
P.A. Now (θ) |
112.2° |
|
Sep first |
0.1 |
|
Sep last |
0.122 |
|
Sep. Now (ρ) |
0.122" |
|
Mag pri |
5.02 |
|
Mag sec |
|
|
delta mag (ΔM) |
|
|
Spectral class |
A2V (white) |
|
Pri motion ra |
-048 |
|
Sec motion ra |
|
|
Pri motion dec |
+211 |
|
Sec motion dec |
|
|
Notes |
N
X
(See Notes, Dubious double) |
|
Nature of this double is uncertain.
17491+5047 SYSTEM COMPONENTS
Show |
name |
SAO |
coord |
wds_name |
last |
obs |
pa |
sep |
mag1 |
mag2 |
d_mag |
orb |
current |
Show |
30 Dra |
30591 |
17 49 04 +50 46 50 |
CHR 65 Aa,Ab |
1985 |
1 |
112 |
0.1 |
5.02 |
|
|
|
<=== |
Show |
|
30591 |
17 49 04 +50 46 50 |
LEP 86 AB |
2000 |
1 |
141 |
209.1 |
5.02 |
16.96 |
11.94 |
|
|
Triple system
2 estimated visually detectable stars in this system
OTHER CATALOGS AND DESIGNATIONS
Name |
30 Dra |
|
Constellation |
Draco |
|
SAO |
30591 |
|
HIP |
87212 |
|
Tycho2 |
3523-01685-1 |
|
HD |
162579 |
|
HR |
6656 |
|
GC |
24221 |
|
BD |
BD+50 2468 |
|
Flamsteed |
30 Draconis |
|
Flamsteed name |
30 Dra |
|
FK5 |
3416 |
|
Distance |
66.53 |
|
Distance ly |
217.02 |
|
WDS 17491+5047 CHR 65 Aa,Ab (30 Dra) : NOTES
discov_num |
notes |
refcode |
CHR 65 |
Aa,Ab: 30 Dra. Hipparcos Acceleration Double Solution. |
|
|
This system, first announced by McAlister and recalled in a later |
McA1984b |
|
McAlister paper after repeated attempts at confirmation, has been |
McA1993 |
|
restored. While perhaps still spurious, the subsequent confirmation or |
|
|
suspected duplicity (by another technique) makes the discovery |
|
|
measurement somewhat more probable. |
|
REFERENCES
refcode |
metd |
author |
reference |
McA1984b |
Sc j |
McAlister, H.A. & Hartkopf, W.I. |
................... |
McA1984b |
|
Catalog of Interferometric Measurements of Binary Stars, CHARA Contrib. #1, 1984 |
|
McA1984b |
|
(previously unpublished KPNO 2.1m and 3.8m data) |
|
McA1993 |
Sc j |
McAlister, H.A., Mason, B.D., Hartkopf, W.I., & Shara, M.M. |
1993AJ....106.1639M |
McA1993 |
+orb |
AJ 106, 1639, 1993 |
|
DISCOVERER
idgroup |
discov |
author |
1 |
CHR |
Center for High Ang. Res. Astronomy (speckle interferometry systems) |
3 |
LEP |
Lepine, S., Wallace, D., Shara, M., Moffat, A., & Niemela, V. |
WDS HISTORIC DATA
coord_2000 |
discov_num |
comp |
epoch |
obs |
pa |
sep |
mag_pri |
mag_sec |
spectr |
notes |
coord_arcsec_2000 |
17491+5047 |
CHR 65 |
Aa,Ab |
1985 |
1 |
112 |
0.1 |
5.02 |
|
A2V |
N |
174904.33+504650.0 |
17491+5047 |
CHR 65 |
Aa,Ab |
1990 |
3 |
26 |
0.1 |
5.02 |
|
A2V |
N |
174904.33+504650.0 |
If you need more information about this double, apply for a
data request form to the WDS.
WDS 17491+5047 CHR 65 Aa,Ab (30 Dra) : VISUAL OBSERVATIONS REPORTS
No records found.
WDS 17491+5047 CHR 65 Aa,Ab (30 Dra) : MEASURES
No records found.
WDS 17491+5047 (30 Dra) : 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 17491+5047 (30 Dra) : ALADIN DSS IMAGE @
Error -22130
Not valid ID.
Error -22130
Not valid ID.
Error -27220
Not valid ID.