20274+7245 A 871
20h 27m 24.67s +72° 44' 38.2" P.A. 184.00 sep 0.3 mag 9.40,9.60 Sp F8
Coord 2000 |
20274+7245 |
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Discov num |
A 871 |
|
Comp |
|
|
Coord arcsec 2000 |
20 27 24.67 +72 44 38.2 |
|
Date first |
1904 |
|
Date last |
2008 |
|
Obs |
15 |
|
Pa first |
95 |
|
Pa last |
184 |
|
P.A. Now (θ) |
184° |
|
Sep first |
0.3 |
|
Sep last |
0.325 |
|
Sep. Now (ρ) |
0.325" |
|
Mag pri |
9.40 |
|
Mag sec |
9.60 |
|
delta mag (ΔM) |
0.2 |
|
Spectral class |
F8 (yellow-white) |
|
Pri motion ra |
-003 |
|
Sec motion ra |
|
|
Pri motion dec |
-006 |
|
Sec motion dec |
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|
Notes |
O
(Orbital solution) |
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This double is physical.
OTHER CATALOGS AND DESIGNATIONS
Constellation |
Draco |
|
Tycho2 |
4455-00436-1 |
|
ADS |
13914 |
|
ORBITAL ELEMENTS
Period (P) | 149y | |
Periastron (T) | 2024y | |
Semi-major axis (a) | 0.316a | |
Eccentricity (e) | 0.67 | |
Inclination (i) | 57° | |
Longitude of periastron (ω) | 248° | |
Node (Ω) | 72.1° | |
Notes | | |
Reference | Hei1998 | |
Equinox | | |
Last observation | | |
Grade | 5 | (1=Definitive, 9=Indet.) |
label |
theta |
rho |
2000 |
198.0 |
0.212 |
2001 |
200.2 |
0.210 |
2002 |
202.4 |
0.209 |
2003 |
204.7 |
0.207 |
2004 |
207.0 |
0.205 |
2005 |
209.3 |
0.203 |
2006 |
211.7 |
0.201 |
2007 |
214.1 |
0.199 |
2008 |
216.6 |
0.197 |
2009 |
219.2 |
0.195 |
2010 |
221.8 |
0.192 |
2011 |
224.5 |
0.189 |
2012 |
227.2 |
0.185 |
2013 |
230.1 |
0.181 |
2014 |
233.2 |
0.177 |
2015 |
236.4 |
0.171 |
2016 |
239.8 |
0.165 |
2017 |
243.6 |
0.158 |
2018 |
247.7 |
0.149 |
2019 |
252.5 |
0.138 |
2020 |
258.1 |
0.126 |
2021 |
264.9 |
0.112 |
2022 |
274.0 |
0.096 |
2023 |
286.7 |
0.080 |
2024 |
305.5 |
0.066 |
2025 |
331.7 |
0.058 |
2026 |
359.4 |
0.062 |
2027 |
20.4 |
0.075 |
2028 |
34.4 |
0.093 |
2029 |
43.8 |
0.112 |
2030 |
50.5 |
0.130 |
|
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Note: Theta is PA, Rho is Sep. For yearly orbits, data refer to Jan 1st.
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Measures: green=micrometric, blue=interferometric, purple=photographic |
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WDS 20274+7245 A 871 : NOTES
No records found.
REFERENCES
refcode |
metd |
author |
reference |
Hei1998 |
Ma j |
Heintz, W.D. |
1998ApJS..117..587H |
Hei1998 |
+orb |
ApJS 117, 587, 1998 |
|
DISCOVERER
idgroup |
discov |
author |
1 |
A |
Aitken, R.G. |
WDS HISTORIC DATA
coord_2000 |
discov_num |
comp |
epoch |
obs |
pa |
sep |
mag_pri |
mag_sec |
spectr |
notes |
coord_arcsec_2000 |
20274+7245 |
A 871 |
|
1997 |
13 |
196 |
0.3 |
9.40 |
9.60 |
F8 |
O |
202724.67+724438.2 |
20274+7245 |
A 871 |
|
2007 |
14 |
183 |
0.3 |
9.40 |
9.60 |
F8 |
O |
202724.67+724438.2 |
20274+7245 |
A 871 |
|
2008 |
15 |
184 |
0.3 |
9.40 |
9.60 |
F8 |
O |
202724.67+724438.2 |
If you need more information about this double, apply for a
data request form to the WDS.
WDS 20274+7245 A 871 : VISUAL OBSERVATIONS REPORTS
No records found.
WDS 20274+7245 A 871 : MEASURES
No records found.
WDS 20274+7245 : VIRTUAL EYEPIECE
Click on the map to see the double of your interest.
Pass over with the mouse cursor to display the catalog designation.
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WDS 20274+7245 : ALADIN DSS IMAGE @ 20h 27m 24.67s +72° 44' 38.2"
WDS 20274+7245 A 871 : NEIGHBORHOODS
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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 |
|
20274+7245 |
A 871 |
|
184 |
0.3 |
|
Show |
|
20339+7229 |
LDS1933 |
|
175 |
7.0 |
33 |
Show |
|
20282+7333 |
MLR 233 |
|
88 |
1.2 |
49 |
Show |
|
20186+7314 |
LDS1931 |
|
85 |
21.4 |
50 |
Show |
|
20157+7307 |
UC 4128 |
|
228 |
26.2 |
57 |
Show |
|
20217+7345 |
A 870 |
|
196 |
0.1 |
65 |
Show |
|
20219+7347 |
HDS2909 |
|
238 |
0.7 |
67 |
Show |
|
20408+7319 |
LDS1939 |
|
227 |
18.9 |
68 |
Show |
|
20458+7219 |
MLB 421 |
|
251 |
1.9 |
88 |
Show |
|
20192+7124 |
MLB 419 |
|
314 |
2.0 |
90 |
Show |
|
20464+7332 |
TDS1099 |
|
336 |
1.2 |
96 |
Show |
|
20380+7119 |
MLB 420 |
|
276 |
3.6 |
98 |
Show |
|
20458+7146 |
SKF1249 |
|
281 |
39.0 |
103 |
Show |
|
20107+7132 |
MLB 416 |
|
161 |
6.7 |
107 |
Show |
|
20139+7434 |
YSC 162 |
|
114 |
0.3 |
123 |
Show |
|
20156+7051 |
MLB 418 |
|
14 |
2.4 |
127 |
Show |
|
20353+7030 |
A 873 |
|
68 |
0.3 |
140 |
Show |
|
20086+7047 |
LDS1927 |
|
220 |
3.9 |
149 |
Show |
|
20284+7015 |
MLB 362 |
|
26 |
5.4 |
150 |
Show |
|
20272+7522 |
TDT2285 |
|
154 |
0.6 |
158 |
Show |
|
20465+7036 |
MLB 363 |
|
211 |
3.2 |
158 |
Show |
|
20160+7013 |
MLB 360 |
|
202 |
2.5 |
162 |
Show |
|
20335+7002 |
TDT2370 |
|
148 |
0.7 |
166 |
Show |
|
20374+7536 |
HEI 7 |
|
231 |
0.7 |
177 |
Show |
|
20454+7000 |
MLR 93 |
|
210 |
0.1 |
186 |
Show |
|
20171+6943 |
LDS1930 |
|
292 |
51.8 |
191 |
Show |
|
20243+6927 |
LDS2452 |
|
157 |
6.9 |
197 |
Show |
|
20201+7605 |
A 869 |
|
269 |
2.1 |
203 |
Show |
|
20094+7602 |
TDT2030 |
|
178 |
0.5 |
211 |
Show |
|
20354+7619 |
OSW 17 |
|
198 |
65.6 |
218 |
Show |
|
20118+7614 |
MLR 232 |
|
166 |
2.6 |
219 |
Show |
|
20109+7616 |
LDS1929 |
|
14 |
15.4 |
223 |
Show |
|
20304+7634 |
TDT2327 |
|
320 |
0.6 |
230 |
Show |
|
20248+7641 |
TDT2248 |
|
243 |
0.4 |
237 |
Show |
|
20273+6846 |
HDS2925 |
|
91 |
0.7 |
239 |
Show |
|
20159+7649 |
LOC 432 |
|
343 |
4.1 |
249 |
Show |
|
20229+6832 |
MLB 361 |
|
326 |
2.6 |
254 |
Show |
|
20095+7651 |
SKF2805 |
|
347 |
158.7 |
254 |
Show |
|
20376+6834 |
TDT2433 |
|
101 |
1.0 |
256 |
Show |
|
20369+6818 |
MLB 299 |
|
204 |
7.6 |
271 |
Show |
|
20100+7711 |
PLT 8 |
|
78 |
24.2 |
275 |
Show |
|
20089+7715 |
LDS1928 |
AB |
166 |
5.4 |
280 |
Show |
|
20077+7718 |
OL 122 |
|
203 |
2.5 |
285 |
Show |
|
20339+6801 |
MLB1089 |
|
354 |
9.2 |
287 |
Show |
|
20284+6756 |
TDT2309 |
|
232 |
0.7 |
289 |
Show |
|
20118+7730 |
LOC 433 |
|
132 |
1.7 |
292 |
Show |
|
20089+7743 |
STF2675 |
AB |
120 |
7.3 |
307 |
Show |
|
20089+7743 |
STF2675 |
AC |
334 |
170.2 |
307 |
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WDS 20274+7245 : COMPONENTS
20274+7245 A
Componente originario normalizzato |
AB |
|
Coord arcsec 2000 |
202724.67+724438.2 |
|
Mag |
9.4 |
|
Spectral class |
F8 (yellow-white) |
|
PmRA |
-3.00 |
|
PmDE |
-6.0 |
|
Tycho2 |
4455-00436-1 |
|
ADS |
13914 |
|
DM |
BD+72 955 |
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Tycho2 |
4455-00436-1 |
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Pflag |
|
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RAmdeg |
306.85277964 |
|
DEmdeg |
72.74393801 |
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PmRA |
1.2 |
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PmDE |
-16.0 |
|
E RAmdeg |
11 |
|
E DEmdeg |
12 |
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E pmRA |
1.4 |
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E pmDE |
1.4 |
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EpRAm |
1990.69 |
|
EpDEm |
1990.47 |
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Num |
7 |
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Q RAmdeg |
1.4 |
|
Q DEmdeg |
0.4 |
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Q pmRA |
1.4 |
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Q pmDE |
0.4 |
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BTmag |
9.987 |
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E BTmag |
0.023 |
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VTmag |
9.416 |
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E VTmag |
0.018 |
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Prox |
999 |
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TYC |
T |
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HIP |
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CCDM |
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RAdeg |
306.85277056 |
|
DEdeg |
72.74397528 |
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EpRA 1990 |
1.77 |
|
EpDE 1990 |
1.75 |
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E RAdeg |
11.0 |
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E DEdeg |
11.9 |
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Posflg |
|
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Corr |
-0.1 |
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Ccdm |
20274+7245 |
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RComp |
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Comp |
A |
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Note1 |
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Note2 |
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Discov num |
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|
DRAs |
0.54 |
|
DDEs |
-21.2 |
|
R dRAs |
10 |
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Year |
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Theta |
|
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Rho |
|
|
Obs |
2 |
|
Vmag |
9.4 |
|
Sp |
F8 |
|
PmNote |
* |
|
PmRA |
-5 |
|
PmDE |
-9 |
|
Dm number |
+72 955 |
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Cat1 |
BD |
|
Name2 |
+72 558 |
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Cat2 |
AGK2/3 |
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HD |
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M HD |
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ADS BDS |
A13914 |
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M ADS BDS |
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N IDS |
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IDS |
20280N7225A |
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HIC |
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20274+7245 B
Componente originario normalizzato |
AB |
|
Coord arcsec 2000 |
202724.67+724437.9 |
|
Mag |
9.6 |
|
Calc delta mag |
0.2 |
|
Calc coord |
yes |
|
Ccdm |
20274+7245 |
|
RComp |
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Comp |
B |
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Note1 |
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Note2 |
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Discov num |
A 871 |
|
DRAs |
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DDEs |
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R dRAs |
|
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Year |
1958 |
|
Theta |
142 |
|
Rho |
0.3 |
|
Obs |
6 |
|
Vmag |
9.6 |
|
Sp |
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PmNote |
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PmRA |
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PmDE |
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Dm number |
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Cat1 |
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Name2 |
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Cat2 |
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HD |
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M HD |
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ADS BDS |
A13914 |
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M ADS BDS |
N |
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N IDS |
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IDS |
20280N7225B |
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HIC |
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