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 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
Notes O (Orbital solution)
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 ReferenceHei1998
Equinox Last observation Grade5(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


 
grafico orbita
Note: Theta is PA, Rho is Sep. For yearly orbits, data refer to Jan 1st.



 
 


wds20274%2B7245a.png orbit plot
Measures: green=micrometric, blue=interferometric, purple=photographic
 
 
 
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
 
 

20274+7245 A   871A mag 9.4 Sp F8 20274+7245 A   871B sep 0.3 P.A. 181.20 mag 9.6 virtual eyepiece
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Pass over with the mouse cursor to display the catalog designation.

Radius:
Components only
 
 
WDS 20274+7245 : ALADIN DSS IMAGE @ 20h 27m 24.67s +72° 44' 38.2"
 
 
 
 
WDS 20274+7245 A 871 : NEIGHBORHOODS
 
 
FoV:
Limit:
Primaries only


20274+7245  A   871 distance=0' 20339+7229  LDS1933 distance=33' 20282+7333  MLR 233 distance=49' 20186+7314  LDS1931 distance=50' 20157+7307  UC 4128 distance=57' 20217+7345  A   870 distance=65' 20219+7347  HDS2909 distance=67' 20408+7319  LDS1939 distance=68' 20458+7219  MLB 421 distance=88' 20192+7124  MLB 419 distance=90' 20464+7332  TDS1099 distance=96' 20380+7119  MLB 420 distance=98' 20458+7146  SKF1249 distance=103' 20107+7132  MLB 416 distance=107' 20139+7434  YSC 162 distance=123' 20156+7051  MLB 418 distance=127' 20353+7030  A   873 distance=140' 20086+7047  LDS1927 distance=149' 20284+7015  MLB 362 distance=150' 20272+7522  TDT2285 distance=158' 20465+7036  MLB 363 distance=158' 20160+7013  MLB 360 distance=162' 20335+7002  TDT2370 distance=166' 20374+7536  HEI   7 distance=177' 20454+7000  MLR  93 distance=186' 20171+6943  LDS1930 distance=191' 20243+6927  LDS2452 distance=197' 20201+7605  A   869 distance=203' 20094+7602  TDT2030 distance=211' 20354+7619  OSW  17 distance=218' 20118+7614  MLR 232 distance=219' 20109+7616  LDS1929 distance=223' 20304+7634  TDT2327 distance=230' 20248+7641  TDT2248 distance=237' 20273+6846  HDS2925 distance=239' 20159+7649  LOC 432 distance=249' 20229+6832  MLB 361 distance=254' 20095+7651  SKF2805 distance=254' 20376+6834  TDT2433 distance=256' 20369+6818  MLB 299 distance=271' 20100+7711  PLT   8 distance=275' 20089+7715  LDS1928AB distance=280' 20077+7718  OL  122 distance=285' 20339+6801  MLB1089 distance=287' 20284+6756  TDT2309 distance=289' 20118+7730  LOC 433 distance=292' 20089+7743  STF2675AB distance=307' 20089+7743  STF2675AC distance=307' grafico limitrofi
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

 
 
WDS 20274+7245 : COMPONENTS
 
 
  A
B pa=181.2°
sep=0.32"
 
 
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
Tycho2
Tycho2 4455-00436-1 Pflag RAmdeg 306.85277964 DEmdeg 72.74393801
PmRA 1.2 PmDE -16.0 E RAmdeg 11 E DEmdeg 12
E pmRA 1.4 E pmDE 1.4 EpRAm 1990.69 EpDEm 1990.47
Num 7 Q RAmdeg 1.4 Q DEmdeg 0.4 Q pmRA 1.4
Q pmDE 0.4 BTmag 9.987 E BTmag 0.023 VTmag 9.416
E VTmag 0.018 Prox 999 TYC T HIP
CCDM RAdeg 306.85277056 DEdeg 72.74397528 EpRA 1990 1.77
EpDE 1990 1.75 E RAdeg 11.0 E DEdeg 11.9 Posflg
Corr -0.1
CCDM
Ccdm 20274+7245 RComp Comp A Note1
Note2 Discov num DRAs 0.54 DDEs -21.2
R dRAs 10 Year Theta Rho
Obs 2 Vmag 9.4 Sp F8 PmNote *
PmRA -5 PmDE -9 Dm number +72 955 Cat1 BD
Name2 +72 558 Cat2 AGK2/3 HD M HD
ADS BDS A13914 M ADS BDS N IDS IDS 20280N7225A
HIC
 
 
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
Ccdm 20274+7245 RComp Comp B Note1
Note2 Discov num A 871 DRAs DDEs
R dRAs Year 1958 Theta 142 Rho 0.3
Obs 6 Vmag 9.6 Sp PmNote
PmRA PmDE Dm number Cat1
Name2 Cat2 HD M HD
ADS BDS A13914 M ADS BDS N N IDS IDS 20280N7225B
HIC