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Doubles in session


Current system
20311+1548
A 1675
HD 195481


Nearby doubles
11' : 20306+1540
GRV 346

12' : 20311+1600
BPM2181

31' : 20324+1524
TDS1080

35' : 20334+1544
BPM2186

38' : 20294+1617
BPM2174

41' : 20321+1511
A 1677

42' : 20340+1543
CBL 527

43' : 20295+1512
BPM2175

45' : 20291+1622
BPM2172

49' : 20288+1514
SLW1225

57' : 20279+1515
BPMA248

58' : 20280+1624
BPM2170

58' : 20271+1549
BPM2168

59' : 20315+1448
J 1884

61' : 20311+1648
ROE 14AB

61' : 20270+1541
BPM2165

61' : 20351+1533
J 566

62' : 20315+1446
J 1885

64' : 20275+1514
J 3087

64' : 20268+1603
GWP2950

65' : 20276+1629
GWP2953

67' : 20316+1442
A 1676

72' : 20357+1522
ARY 85

74' : 20274+1457
BRT1343

75' : 20259+1549
BPM2154

76' : 20275+1454
A 1674AB



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.

20311+1548 A 1675 (HD 195481)

 
 
20h 31m 06.12s +15° 48' 27.5" P.A. 294.00 sep 0.1 mag 7.14,8.65 Sp A2V dist. 168.92 pc (551.02 l.y.)
 
 
Coord 2000 20311+1548 Discov num A  1675 Comp Coord arcsec 2000 20 31 06.12 +15 48 27.5
Date first 1907 Date last 2021 Obs 88
Pa first 327 Pa last 293.7 P.A. Now (θ) 290.4°
Sep first 0.2 Sep last 0.12 Sep. Now (ρ) 0.125"
Mag pri 7.14 Mag sec 8.65 delta mag (ΔM) 1.51 Spectral class A2V (white)
Pri motion ra -003 Sec motion ra
Pri motion dec -009 Sec motion dec
Notes N O (See Notes, Orbital solution)
This double is physical.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Name HD 195481 Constellation Delphinus SAO 106194 HIP 101223
Tycho2 1632-01088-1 Gaia DR2 1805573537932800896 HD 195481 GC 28542
ADS 13944 BD BD+15 4181 Distance 168.92 Distance ly 551.02
 
 
ORBITAL ELEMENTS
 
 
Period (P)49.62y Periastron (T)1947.75y Semi-major axis (a)0.145a
Eccentricity (e)0.568 Inclination (i)109.4° Longitude of periastron (ω)60.2°
Node (Ω)142.6° Notesn ReferenceHrt2001b
Equinox2000 Last observation1994 Grade2(1=Definitive, 9=Indet.)
label theta rho
2000 344.4 0.056
2001 335.2 0.080
2002 330.1 0.100
2003 326.5 0.117
2004 323.8 0.131
2005 321.6 0.142
2006 319.6 0.151
2007 317.9 0.158
2008 316.3 0.163
2009 314.7 0.166
2010 313.2 0.169
2011 311.8 0.170
2012 310.4 0.170
2013 308.9 0.170
2014 307.4 0.168
2015 305.9 0.165
2016 304.4 0.162
2017 302.8 0.159
2018 301.1 0.154
2019 299.3 0.149
2020 297.3 0.144
2021 295.2 0.138
2022 292.9 0.132
2023 290.4 0.125
2024 287.6 0.118
2025 284.4 0.112
2026 280.9 0.104
2027 276.8 0.097
2028 272.0 0.091
2029 266.5 0.084
2030 260.1 0.078


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


 
  


wds20311%2B1548a.png orbit plot
Measures: green=micrometric, blue=interferometric, purple=photographic		  
 
 
WDS 20311+1548 A 1675 (HD 195481) : NOTES
 
 
discov_num notes refcode
A 1675 A measure on 1980.7257, incorrectly attributed to ADS 13944 by
McAlister et al. (1983), actually belongs to ADS 14761. McA1983
1980.4771: Theta was incorrectly given as 313.7 degrees McA1983
1980.7257: This measure was incorrectly attributed to HR 8059 McA1983
1986.578: Separation for this partially resolved pair was calculated
under the assumption of zero or otherwise known magnitude difference. Tok1985
Malkov et al. (2012) derive dynamical, photometric, and spectroscopic
masses of 5.97 +/- 2.33, 4.29, and 2.09 Msun, respectively. Mlk2012
 
 
REFERENCES
 
 
refcode metd author reference
Hrt2001b orb - Hartkopf, W.I. & Mason, B.D. 2001IAUDS.145....1H
Hrt2001b Inf. Circ. 145, 1, 2001
McA1983 Sc j McAlister, H.A., Hendry, E.M., Hartkopf, W.I., Campbell, B.G., & Fekel, F.C. 1983ApJS...51..309M
McA1983 ApJS 51, 309, 1983
Mlk2012 not - Malkov, O.Yu., Tamazian, V.S., Docobo, J.A., & Chulkov, D.A. 2012A&A...546A..69M
Mlk2012 A&A 546, A69, 2012
Tok1985 Ig u Tokovinin, A.A. 1985A&AS...61..483T
Tok1985 A&AS 61, 483, 1985
 
 
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
20311+1548 A 1675 1994 80 148 0.1 7.14 8.65 A2V NOD 203106.12+154827.5
20311+1548 A 1675 2006 81 323 0.1 7.14 8.65 A2V NOD 203106.12+154827.5
20311+1548 A 1675 2015 83 306 0.2 7.14 8.65 A2V NO 203106.12+154827.5
20311+1548 A 1675 2018 84 301 0.1 7.14 8.65 A2V NO 203106.12+154827.5
20311+1548 A 1675 2021 87 294 0.1 7.14 8.65 A2V NO 203106.12+154827.5

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

 
 
WDS 20311+1548 A 1675 (HD 195481) : VISUAL OBSERVATIONS REPORTS
 
 
No records found.


 
 
WDS 20311+1548 A 1675 (HD 195481) : MEASURES
 
 
No records found.

 
 
WDS 20311+1548 (HD 195481) : VIRTUAL EYEPIECE
 
 

20311+1548 A 1675A mag 7.14 Sp A2V 20311+1548 A 1675B sep 0.1 P.A. 294.50 mag 8.65 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 20311+1548 (HD 195481) : ALADIN DSS IMAGE @ 20h 31m 06.12s +15° 48' 27.5"
 
 
 
 
WDS 20311+1548 A 1675 (HD 195481) : NEIGHBORHOODS
 
 
FoV:
Limit:
Primaries only

20311+1548 A 1675 distance=0' 20306+1540 GRV 346 distance=11' 20311+1600 BPM2181 distance=12' 20324+1524 TDS1080 distance=31' 20334+1544 BPM2186 distance=35' 20294+1617 BPM2174 distance=38' 20321+1511 A 1677 distance=41' 20340+1543 CBL 527 distance=42' 20295+1512 BPM2175 distance=43' 20291+1622 BPM2172 distance=45' 20288+1514 SLW1225 distance=49' 20279+1515 BPMA248 distance=57' 20280+1624 BPM2170 distance=58' 20271+1549 BPM2168 distance=58' 20315+1448 J 1884 distance=59' 20311+1648 J 563BC distance=61' 20311+1648 ROE 14AB distance=61' 20270+1541 BPM2165 distance=61' 20351+1533 J 566 distance=61' 20315+1446 J 1885 distance=62' 20275+1514 J 3087 distance=64' 20268+1603 GWP2950 distance=64' 20276+1629 GWP2953 distance=65' 20316+1442 A 1676 distance=67' 20357+1522 ARY 85 distance=72' 20274+1457 BRT1343 distance=74' 20259+1549 BPM2154 distance=75' 20275+1454 A 1674AB distance=76' 20275+1454 A 1674AC distance=76' 20275+1454 A 1674CD distance=76' 20332+1659 BPM2185 distance=77' 20348+1644 BPM2196BC distance=78' 20348+1644 BPM2195AB distance=78' 20281+1654 HEI 180 distance=79' 20352+1457 SKF1767 distance=79' 20366+1553 BPM2207 distance=80' 20255+1555 BPM2152 distance=81' 20340+1659 BPM2190 distance=82' 20338+1704 BPM2188 distance=86' 20267+1646 TVB 314 distance=86' 20298+1712 J 510 distance=86' 20284+1432 TDT2312 distance=87' 20363+1636 J 3095 distance=87' 20253+1609 BPM2150 distance=87' 20252+1532 TDT2256 distance=87' 20257+1510 BPM2153 distance=88' 20250+1532 TDS1072 distance=90' 20351+1439 BPM2198BC distance=90' 20307+1718 BPM2178 distance=91' 20351+1439 BPM2197AB distance=91' 20353+1440 DRS 32 distance=92' 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 20311+1548 A 1675 294 0.1
Show 20306+1540 GRV 346 11 66.6 11
Show 20311+1600 BPM2181 57 94.1 12
Show 20324+1524 TDS1080 286 1.0 31
Show 20334+1544 BPM2186 75 53.0 35
Show 20294+1617 BPM2174 211 87.3 38
Show 20321+1511 A 1677 184 1.3 41
Show 20340+1543 CBL 527 190 50.3 42
Show 20295+1512 BPM2175 197 75.4 43
Show 20291+1622 BPM2172 155 50.8 45
Show 20288+1514 SLW1225 38 11.7 49
Show 20279+1515 BPMA248 224 168.3 57
Show 20280+1624 BPM2170 207 80.4 58
Show 20271+1549 BPM2168 55 108.3 58
Show 20315+1448 J 1884 132 8.8 59
Show 20311+1648 J 563 BC 215 5.1 61
Show 20311+1648 ROE 14 AB 262 7.0 61
Show 20270+1541 BPM2165 182 62.1 61
Show 20351+1533 J 566 119 4.1 61
Show 20315+1446 J 1885 353 12.0 62
Show 20275+1514 J 3087 329 6.2 64
Show 20268+1603 GWP2950 44 20.6 64
Show 20276+1629 GWP2953 29 69.7 65
Show 20316+1442 A 1676 99 1.9 67
Show 20357+1522 ARY 85 321 83.6 72
Show 20274+1457 BRT1343 335 4.5 74
Show 20259+1549 BPM2154 206 93.0 75
Show 20275+1454 A 1674 AB 14 0.9 76
Show 20275+1454 A 1674 AC 294 8.4 76
Show 20275+1454 A 1674 CD 171 1.3 76
Show 20332+1659 BPM2185 75 70.1 77
Show 20348+1644 BPM2196 BC 128 63.7 78
Show 20348+1644 BPM2195 AB 302 71.3 78
Show 20281+1654 HEI 180 166 1.1 79
Show 20352+1457 SKF1767 246 1.5 79
Show 20366+1553 BPM2207 49 43.4 80
Show 20255+1555 BPM2152 335 107.4 81
Show 20340+1659 BPM2190 300 100.0 82
Show 20338+1704 BPM2188 244 105.7 86
Show 20267+1646 TVB 314 209 17.2 86
Show 20298+1712 J 510 248 4.9 86
Show 20284+1432 TDT2312 251 0.6 87
Show 20363+1636 J 3095 185 7.7 87
Show 20253+1609 BPM2150 238 101.1 87
Show 20252+1532 TDT2256 43 0.9 87
Show 20257+1510 BPM2153 113 95.6 88
Show 20250+1532 TDS1072 161 0.9 90
Show 20351+1439 BPM2198 BC 11 114.9 90
Show 20307+1718 BPM2178 217 110.0 91
Show 20351+1439 BPM2197 AB 327 17.3 91
Show 20353+1440 DRS 32 143 13.5 92

 
 
WDS 20311+1548 : COMPONENTS
 
 
  A
B pa=294.5°
sep=0.12"
 
 
20311+1548 A
 
 
Componente originario normalizzato AB Name HD 195481 Coord arcsec 2000 203106.12+154827.5 Mag 7.14
Spectral class A2V (white) PmRA -3.00 PmDE -9.0 SAO 106194
HIP 101223 Tycho2 1632-01088-1 HD 195481 GC 28542
ADS 13944 BD BD+15 4181
Tycho2
Tycho2 1632-01088-1 Pflag RAmdeg 307.77547781 DEmdeg 15.80763082
PmRA -5.9 PmDE -5.0 E RAmdeg 4 E DEmdeg 4
E pmRA 1.2 E pmDE 1.2 EpRAm 1991.40 EpDEm 1991.24
Num 12 Q RAmdeg 1.2 Q DEmdeg 1.2 Q pmRA 1.4
Q pmDE 1.2 BTmag 7.001 E BTmag 0.015 VTmag 6.861
E VTmag 0.010 Prox 999 TYC T HIP 101223
CCDM AB RAdeg 307.77549194 DEdeg 15.80764306 EpRA 1990 1.59
EpDE 1990 1.41 E RAdeg 4.0 E DEdeg 4.3 Posflg P
Corr -0.1
SAO
SAO 106194 DelFlag RA1950 PmRA1950 -0.0011
DE1950 PmDE1950 -0.012 Vmag 6.8 SpType A2
Double code Source 70 CatNum 28542 DM BD+15 4181
DMcomp BDsup HD 195481 M HD 0
GC 28542 RA1950rad 5.36159698 DE1950rad 0.27293827 PmRA2000 -0.001
PmDE2000 -0.014
Hipparcos
Catalog H HIP 101223 Proxy H RAhms 20 31 06.12
DEdms +15 48 27.5 Vmag 6.85 VarFlag R Vmag H
RAdeg 307.775 DEdeg 15.8076 AstroRef * Plx 6.18
CCDM 20311+1548 N CCDM I Nsys 1 Ncomp 2
MultFlag C Source S Qual C M HIP AB
Theta 190 Rho 0.096 HD 195481 BD BD+15 4181
CD CP Dm number +15 4181 VIred 0.12
SpType A2 R SpType Coord arcsec 2000 203106.12+154827.5
Hipparcos 2
HIP 101223 Sn 55 So 3 Nc 2
RArad 5.3716956858 DErad 0.2758954431 Plx 5.92 PmRA -5.49
PmDE -5.9 E RArad 0.45 E DErad 0.4 E Plx 0.56
E pmRA 0.62 E pmDE 0.44 Hpmag 6.8992 E Hpmag 0.001
SHp 0.009 VA 0 BV 0.138 E BV 0.008
VI 0.15
CCDM
Ccdm 20311+1548 RComp Comp A Note1
Note2 Discov num DRAs 0.06 DDEs 28.2
R dRAs 10 Year Theta Rho
Obs 2 Vmag 7.6 Sp A2 PmNote *
PmRA -15 PmDE 8 Dm number +15 4181 Cat1 BD
Name2 +15 2232 Cat2 AGK2/3 HD 195481 M HD
ADS BDS A13944 M ADS BDS N IDS IDS 20265N1528A
HIC 101223
 
 
20311+1548 B
 
 
Componente originario normalizzato AB Coord arcsec 2000 203106.11+154827.5 Mag 8.65 Calc delta mag 1.51
Calc coord yes
CCDM
Ccdm 20311+1548 RComp Comp B Note1 *
Note2 Discov num A 1675 DRAs DDEs
R dRAs Year 1907 Theta Rho
Obs 99 Vmag 7.6 Sp PmNote
PmRA PmDE Dm number Cat1
Name2 Cat2 HD M HD
ADS BDS A13944 M ADS BDS N IDS IDS 20265N1528B
HIC 101223