21098+2915 DU 3
21h 10m 54.59s +28° 56' 10.4" P.A. 15.00 sep 6.1 mag 10.67,10.69
| Coord 2000 |
21098+2915 |
|
Discov num |
DU 3 |
|
Comp |
|
|
Coord arcsec 2000 |
21 10 54.59 +28 56 10.4 |
|
| Date first |
1873 |
|
Date last |
2016 |
|
Obs |
18 |
|
| Pa first |
18 |
|
Pa last |
14.9 |
|
P.A. Now (θ) |
14.9° |
|
| Sep first |
6.4 |
|
Sep last |
6.123 |
|
Sep. Now (ρ) |
6.123" |
|
| Mag pri |
10.67 |
|
Mag sec |
10.69 |
|
delta mag (ΔM) |
0.02 |
|
Spectral class |
|
|
| Pri motion ra |
+038 |
|
Sec motion ra |
+036 |
|
| Pri motion dec |
-015 |
|
Sec motion dec |
-013 |
|
| Notes |
N
T
(See Notes, Parallax indicates physical) |
|
rPM=0.069 (< 0.3, Physical double)
This double is physical.
OTHER CATALOGS AND DESIGNATIONS
| Constellation |
Cygnus |
|
Tycho2 |
2185-02284-1 |
|
Gaia DR2 |
1851421867140809216 |
|
WDS 21098+2915 DU 3 : NOTES
| discov_num |
notes |
refcode |
| DU 3 |
Aka WFC 234. DM number incorrectly listed as BD+28 4015 in BDS. |
|
REFERENCES
| refcode |
metd |
author |
reference |
| Du_1871 |
orb - |
Duner, N.C. |
1871AN.....78..315D |
| Du_1871 |
|
AN 78, 315, #1868, 1871 |
|
| Du_1876 |
Ma - |
Duner, N.C. |
. |
| Du_1876 |
+orb |
Mesures Microm. Lund, 1876 |
|
| Du_1878A |
orb - |
Duner, N.C. |
. |
| Du_1878A |
|
cited by Flammarion ("Cat. des Etoiles Doubles", 1878) |
|
| Du_1878B |
Ma - |
Duner, N.C. |
1878Obs.....2..146G |
| Du_1878B |
|
cited by Gledhill (Obs 2, 146, 1878) |
|
| Du_1906A |
Ma - |
Duner, N.C. |
1906MmRAS..56....1L |
| Du_1906A |
|
cited by Lewis (MemRAS 56, 1, 1906) |
|
WDS HISTORIC DATA
| coord_2000 |
discov_num |
comp |
epoch |
obs |
pa |
sep |
mag_pri |
mag_sec |
spectr |
notes |
coord_arcsec_2000 |
| 21098+2915 |
DU 3 |
|
1926 |
5 |
200 |
6.0 |
10.60 |
10.70 |
|
|
|
| 21098+2915 |
DU 3 |
|
1999 |
8 |
196 |
6.1 |
10.67 |
10.69 |
|
D |
211054.59+285610.4 |
| 21098+2915 |
DU 3 |
|
2011 |
9 |
195 |
6.0 |
10.69 |
10.67 |
|
N D |
211054.59+285610.4 |
| 21098+2915 |
DU 3 |
|
2016 |
12 |
16 |
6.1 |
10.67 |
10.69 |
|
N |
211054.59+285610.4 |
If you need more information about this double, apply for a
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WDS 21098+2915 DU 3 : VISUAL OBSERVATIONS REPORTS
No records found.
WDS 21098+2915 DU 3 : MEASURES
No records found.
WDS 21098+2915 : VIRTUAL EYEPIECE
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|
WDS 21098+2915 : ALADIN DSS IMAGE @
Error -22130
Not valid ID.
Error -22130
Not valid ID.
Error -27220
Not valid ID.
