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Doubles in session


Current system
20454+4816
UC 254
HD 197988


Nearby doubles
31' : 20478+4754
ES 2253

36' : 20478+4750
ES 810

43' : 20441+4856
HEI 912

44' : 20496+4805
HJ 1584

44' : 20414+4758
ES 809AB

47' : 20409+4828
ES 808

47' : 20481+4738
TDT2547

47' : 20437+4733
A 749

48' : 20470+4901
HDS2962

59' : 20396+4823
RAO 616

59' : 20450+4718
BRT2274

60' : 20397+4806
ES 806AB

62' : 20443+4716
TDT2509

63' : 20405+4855
ES 807

65' : 20406+4900
ES 509

66' : 20438+4921
HEI 911

66' : 20502+4732
ES 672

67' : 20425+4916
ARG 39AB

67' : 20389+4803
CNT 7

68' : 20434+4712
TDT2496

68' : 20387+4830
HJ 1558

70' : 20434+4923
STJ 111

72' : 20397+4734
A 747AB

73' : 20383+4804
ES 89AB

74' : 20389+4741
A 746

75' : 20529+4814
ES 812



Selections
Full WDS
Binocular doubles
Binary Systems
Triple Systems
Quadruple Systems
Multiple Systems
Neglected List I
Neglected List II
Observed
Herschel, W.
Herschel, J.F.W.
Struve, Otto
Struve, F.G.W.

20454+4816 UC 254 (HD 197988)

 
 
20h 45m 24.35s +48° 16' 25.9" P.A. 181.00 sep 17.9 mag 8.37,12.41 Sp F0V
 
 
Coord 2000 20454+4816 Discov num UC  254 Comp Coord arcsec 2000 20 45 24.35 +48 16 25.9
Date first 1999 Date last 2016 Obs 10
Pa first 181 Pa last 181.4 P.A. Now (θ) 181.4°
Sep first 17.8 Sep last 17.901 Sep. Now (ρ) 17.901"
Mag pri 8.37 Mag sec 12.41 delta mag (ΔM) 4.04 Spectral class F0V (yellow-white)
Pri motion ra +059 Sec motion ra +064
Pri motion dec +087 Sec motion dec +082
Notes V (Proper motion indicates physical)
rPM=0.067 (< 0.3, Physical double)
This double is physical.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Name HD 197988 Constellation Cygnus SAO 50030 Tycho2 3578-00245-1
Gaia DR2 2167561559263854336 HD 197988 DM BD+47 3180
 
 
WDS 20454+4816 UC 254 (HD 197988) : NOTES
 
 
No records found.

 
 
REFERENCES
 
 
refcode metd author reference
UC USNO CCD Astrographic Catalog (UCAC1, UCAC2, UCAC3, UCAC4) ...................
UC_2013a Eu j Zacharias, N., Finch, C.T., Girard, T.M., Henden, A., Bartlett, J.L., Monet, D.G., 2013AJ....145...44Z
UC_2013a & Zacharias, M.I. (UCAC4 Catalog)
UC_2013a AJ 145, 44, 2013
UC_2013b Eu j Hartkopf, W.I., Mason, B.D., Finch, C.T., Zacharias, N., Wycoff, G.L., & Hsu, D. 2013AJ....146...76H
UC_2013b AJ 146, 76, 2013 (UC 301 - 5058)
UC_2013b (Relative astrometry is derived from individual measurements, not precessed means.
UC_2013b UCAC aperture magnitudes are listed, unless the duplicity flag indicates a blended
UC_2013b image (a flag value of 30 or higher). Model fit magnitudes are given for both
UC_2013b components if either has such a flag. Model fit magnitudes are indicated by the
UC_2013b letter "f" following the filter information.
UC_2013b APASS photometry extracted from UCAC4 catalog is listed under reference AAV2012.
UC_2013b Due to aperture method used, APASS photometry is only included for pairs wider
UC_2013b than 10" (Henden, private comm.) Photometry for pairs wider than 10" which showed
UC_2013b identical values for both components in all filters were removed, as well.
UC_2015 Eu - Zacharias, N., Finch, C.T., Subasavage, J.P., Bredthauer, G., Crockett, C., 2015AJ....150..101Z
UC_2015 DiVittorio, M., Ferguson, E., Harris, F., Harris, H.C., Hendon, A., Kilian, C.,
UC_2015 Munn, J., Rafferty, T., Rhodes, A., Schultheis, M., Tilleman, T., & Wieder, G.
UC_2015 AJ 150, 101, 2015
UC_9999 Eu - temporary UCAC files ...................
 
 
WDS HISTORIC DATA
 
 
coord_2000 discov_num comp epoch obs pa sep mag_pri mag_sec spectr notes coord_arcsec_2000
20454+4816 UC 254 1999 1 181 17.8 8.37 11.97 V 204524.35+481625.9
20454+4816 UC 254 2003 2 181 17.7 8.37 11.97 VD 204524.35+481625.9
20454+4816 UC 254 2008 3 182 17.7 8.37 11.97 VD 204524.35+481625.9
20454+4816 UC 254 2010 4 181 17.9 8.37 12.41 F0V V 204524.35+481625.9
20454+4816 UC 254 2014 7 182 17.9 8.37 12.41 F0V V 204524.35+481625.9
20454+4816 UC 254 2015 8 181 17.9 8.37 12.41 F0V V 204524.35+481625.9
20454+4816 UC 254 2016 10 181 17.9 8.37 12.41 F0V V 204524.35+481625.9

If you need more information about this double, apply for a data request form to the WDS.

 
 
WDS 20454+4816 UC 254 (HD 197988) : VISUAL OBSERVATIONS REPORTS
 
 
No records found.


 
 
WDS 20454+4816 UC 254 (HD 197988) : MEASURES
 
 
No records found.

 
 
WDS 20454+4816 (HD 197988) : VIRTUAL EYEPIECE
 
 

20454+4816 UC 254A mag 8.37 Sp F0V 20454+4816 UC 254B sep 17.9 P.A. 180.90 mag 12.41 virtual eyepiece
Click on the map to see the double of your interest.
Pass over with the mouse cursor to display the catalog designation.
Radius:
Components only
 
 
WDS 20454+4816 (HD 197988) : ALADIN DSS IMAGE @ 20h 45m 24.35s +48° 16' 25.9"
 
 
 
 
WDS 20454+4816 UC 254 (HD 197988) : NEIGHBORHOODS
 
 
FoV:
Limit:
Primaries only

20454+4816 UC 254 distance=0' 20478+4754 ES 2253 distance=31' 20478+4750 ES 810 distance=36' 20441+4856 HEI 912 distance=43' 20496+4805 HJ 1584 distance=44' 20414+4758 ES 809AB distance=44' 20414+4758 SKF2394AC distance=44' 20409+4828 ES 808 distance=47' 20481+4738 TDT2547 distance=47' 20437+4733 A 749 distance=47' 20470+4901 HDS2962 distance=48' 20396+4823 RAO 616 distance=59' 20450+4718 BRT2274 distance=59' 20397+4806 ES 806AB distance=60' 20397+4806 ES 806AC distance=60' 20443+4716 TDT2509 distance=62' 20405+4855 ES 807 distance=63' 20406+4900 ES 509 distance=65' 20438+4921 HEI 911 distance=66' 20502+4732 ES 672 distance=66' 20425+4916 ARG 39BC distance=66' 20425+4916 ARG 39BD distance=66' 20425+4916 ARG 39BE distance=66' 20425+4916 ARG 39AB distance=67' 20425+4916 ARG 39AF distance=67' 20425+4916 ARG 39AG distance=67' 20389+4803 CNT 7 distance=67' 20434+4712 TDT2496 distance=68' 20387+4830 HJ 1558 distance=68' 20434+4923 STJ 111 distance=70' 20397+4734 A 747AB distance=72' 20397+4734 ES 90AB,C distance=72' 20383+4804 ES 89AB distance=73' 20389+4741 A 746 distance=74' 20529+4814 ES 812 distance=75' 20379+4757 GUI 33BC distance=78' 20379+4757 STF2707AB distance=79' 20379+4757 STF2707AC distance=79' 20379+4757 ES 2697AD distance=79' 20379+4757 HDS2944Ca,Cb distance=79' 20397+4721 A 748 distance=80' 20418+4929 HEI 910 distance=81' 20517+4721 TDT2584 distance=85' 20437+4651 TDS1096 distance=88' 20482+4653 ES 669 distance=89' 20541+4850 CTI5707 distance=93' 20521+4923 ES 811 distance=93' 20457+4951 TDT2521 distance=95' 20540+4905 HEI 913 distance=99' 20361+4745 HJ 1549 distance=99' 20379+4710 TDT2436 distance=101' 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 20454+4816 UC 254 181 17.9
Show 20478+4754 ES 2253 335 3.4 31
Show 20478+4750 ES 810 40 20.7 36
Show 20441+4856 HEI 912 201 1.7 43
Show 20496+4805 HJ 1584 223 4.3 44
Show 20414+4758 ES 809 AB 285 1.6 44
Show 20414+4758 SKF2394 AC 68 3.0 44
Show 20409+4828 ES 808 157 3.3 47
Show 20481+4738 TDT2547 73 2.5 47
Show 20437+4733 A 749 306 0.5 47
Show 20470+4901 HDS2962 222 0.1 48
Show 20396+4823 RAO 616 122 1.8 59
Show 20450+4718 BRT2274 41 4.9 59
Show 20397+4806 ES 806 AB 267 7.0 60
Show 20397+4806 ES 806 AC 24 11.9 60
Show 20443+4716 TDT2509 180 1.4 62
Show 20405+4855 ES 807 154 3.9 63
Show 20406+4900 ES 509 285 8.6 65
Show 20438+4921 HEI 911 125 2.4 66
Show 20502+4732 ES 672 166 4.6 66
Show 20425+4916 ARG 39 BC 100 35.4 66
Show 20425+4916 ARG 39 BD 241 21.1 66
Show 20425+4916 ARG 39 BE 55 44.1 66
Show 20425+4916 ARG 39 AB 184 15.4 67
Show 20425+4916 ARG 39 AF 258 34.4 67
Show 20425+4916 ARG 39 AG 341 52.4 67
Show 20389+4803 CNT 7 82 3.5 67
Show 20434+4712 TDT2496 49 1.7 68
Show 20387+4830 HJ 1558 205 4.4 68
Show 20434+4923 STJ 111 64 0.9 70
Show 20397+4734 A 747 AB 104 0.3 72
Show 20397+4734 ES 90 AB,C 141 7.1 72
Show 20383+4804 ES 89 AB 209 21.5 73
Show 20389+4741 A 746 150 2.0 74
Show 20529+4814 ES 812 169 8.5 75
Show 20379+4757 GUI 33 BC 199 76.6 78
Show 20379+4757 STF2707 AB 29 21.8 79
Show 20379+4757 STF2707 AC 195 55.3 79
Show 20379+4757 ES 2697 AD 192 17.5 79
Show 20379+4757 HDS2944 Ca,Cb 29 0.4 79
Show 20397+4721 A 748 27 1.4 80
Show 20418+4929 HEI 910 201 1.6 81
Show 20517+4721 TDT2584 177 2.4 85
Show 20437+4651 TDS1096 147 0.9 88
Show 20482+4653 ES 669 28 6.8 89
Show 20541+4850 CTI5707 148 12.3 93
Show 20521+4923 ES 811 158 1.4 93
Show 20457+4951 TDT2521 236 0.3 95
Show 20540+4905 HEI 913 14 2.1 99
Show 20361+4745 HJ 1549 55 5.5 99
Show 20379+4710 TDT2436 82 0.6 101

 
 
WDS 20454+4816 : COMPONENTS
 
 
  A
B pa=180.9°
sep=17.90"
 
 
20454+4816 A
 
 
Componente originario normalizzato AB Name HD 197988 Coord arcsec 2000 204524.35+481625.9 Mag 8.37
Spectral class F0V (yellow-white) PmRA 59.00 PmDE 87.0 SAO 50030
Tycho2 3578-00245-1 HD 197988 DM BD+47 3180
Tycho2
Tycho2 3578-00245-1 Pflag RAmdeg 311.35147569 DEmdeg 48.27387246
PmRA 59.5 PmDE 85.5 E RAmdeg 6 E DEmdeg 6
E pmRA 1.5 E pmDE 1.5 EpRAm 1991.42 EpDEm 1991.42
Num 7 Q RAmdeg 0.5 Q DEmdeg 1.2 Q pmRA 0.5
Q pmDE 1.3 BTmag 8.783 E BTmag 0.017 VTmag 8.373
E VTmag 0.012 Prox 997 TYC T HIP
CCDM RAdeg 311.35127139 DEdeg 48.27367639 EpRA 1990 1.76
EpDE 1990 1.75 E RAdeg 6.0 E DEdeg 6.1 Posflg
Corr 0.0
SAO
SAO 50030 DelFlag RA1950 PmRA1950 0.0047
DE1950 PmDE1950 0.124 Vmag 7.9 SpType K0
Double code Source 3 CatNum 1668 DM BD+47 3180
DMcomp BDsup HD 197988 M HD 0
GC RA1950rad 5.42699054 DE1950rad 0.8393241 PmRA2000 0.005
PmDE2000 0.122
 
 
20454+4816 B
 
 
Componente originario normalizzato AB Coord arcsec 2000 204524.32+481608.0 Mag 12.41 PmRA 64.00
PmDE 82.0 Calc delta mag 4.04 Calc coord yes