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Current system
20550+2805
BU 367 AB


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Observed
Herschel, W.
Herschel, J.F.W.
Struve, Otto
Struve, F.G.W.

20550+2805 BU 367 AB

 
 
20h 55m 02.41s +28° 05' 25.6" P.A. 224.00 sep 0.1 mag 8.31,9.00 Sp G1V dist. 62.11 pc (202.6 l.y.)
 
 
Coord 2000 20550+2805 Discov num BU  367 Comp AB Coord arcsec 2000 20 55 02.41 +28 05 25.6
Date first 1874 Date last 2021 Obs 131
Pa first 120 Pa last 224.4 P.A. Now (θ) 237.7°
Sep first 0.4 Sep last 0.146 Sep. Now (ρ) 0.152"
Mag pri 8.31 Mag sec 9.00 delta mag (ΔM) 0.69 Spectral class G1V (yellow)
Pri motion ra +109 Sec motion ra +109
Pri motion dec -081 Sec motion dec -081
Notes N O (See Notes, Orbital solution)
This double is physical.
 
 
20550+2805 SYSTEM COMPONENTS
 
 
Show name SAO coord wds_name last obs pa sep mag1 mag2 d_mag orb current
Show 89278 20 55 02 +28 05 26 BU 367 AB 2021 131 224 0.1 8.31 9.00 0.69 Y <===
Show HD 199221 89278 20 55 02 +28 05 26 BU 367 AB,C 2014 11 358 38.0 7.91 12.30 4.39
Show 89278 20 55 02 +28 05 26 BU 367 AB,D 2014 9 67 19.6 7.91 15.00 7.09
Show 89278 20 55 02 +28 05 26 A 3109 AB,E 2014 7 51 49.2 7.91 13.50 5.59
Quintuple system
6 estimated visually detectable stars in this system
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Constellation Vulpecula SAO 89278 HIP 103247 Tycho2 2179-00116-1
Gaia DR2 1845833599295880704 HD 199221 GC 29194 ADS 14424
BD BD+27 3915 Distance 62.11 Distance ly 202.6
 
 
ORBITAL ELEMENTS
 
 
Period (P)104.02y± 0.16 Periastron (T)1934.61y± 0.33 Semi-major axis (a)0.41a± 0.024
Eccentricity (e)0.277± 0.002 Inclination (i)68.2°± 0.4 Longitude of periastron (ω)185.8°± 1.4
Node (Ω)119.9°± 0.5 Notesn ReferenceSca2021b
Equinox Last observation2021 Grade2(1=Definitive, 9=Indet.)
label theta rho
2000 133.9 0.429
2001 135.1 0.416
2002 136.3 0.403
2003 137.6 0.390
2004 139.1 0.375
2005 140.6 0.361
2006 142.3 0.345
2007 144.1 0.329
2008 146.1 0.313
2009 148.3 0.297
2010 150.8 0.280
2011 153.7 0.263
2012 156.9 0.246
2013 160.6 0.229
2014 164.8 0.213
2015 169.8 0.197
2016 175.6 0.182
2017 182.3 0.169
2018 190.1 0.158
2019 198.9 0.150
2020 208.4 0.145
2021 218.4 0.144
2022 228.4 0.146
2023 237.7 0.152
2024 246.2 0.161
2025 253.7 0.172
2026 260.3 0.185
2027 265.9 0.199
2028 270.8 0.213
2029 275.1 0.227
2030 278.9 0.241


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


 
  


wds20550%2B2805b.png orbit plot
Measures: green=micrometric, blue=interferometric, purple=photographic		  
 
 
WDS 20550+2805 BU 367 AB : NOTES
 
 
discov_num notes refcode
BU 367 AB: Malkov et al. (2012) derive dynamical, photometric, and
spectroscopic masses 1.62 +/- 0.40, 2.21, and 1.02 Msun, respectively. Mlk2012
 
 
REFERENCES
 
 
refcode metd author reference
Mlk2012 not - Malkov, O.Yu., Tamazian, V.S., Docobo, J.A., & Chulkov, D.A. 2012A&A...546A..69M
Mlk2012 A&A 546, A69, 2012
Sca2021b orb - Scardia, M., Prieur, J.-L., Pansecchi, L., Ling, J.F., Argyle, R.W., Aristidi, E., 2021IAUDS.205....1S
Sca2021b Zanutta, A., Abe, Bendjoya, Rivet, Vernet, & Maccarini .
Sca2021b Inf. Circ. 205, 1, 2021 .
 
 
DISCOVERER
 
 
idgroup discov author
1 A Aitken, R.G.
312 BU Burnham, S.W. (BU 1 - 81)
 
 
WDS HISTORIC DATA
 
 
coord_2000 discov_num comp epoch obs pa sep mag_pri mag_sec spectr notes coord_arcsec_2000
20550+2805 BU 367 AB 2003 126 139 0.4 8.31 9.00 G1V NOD 205502.33+280526.4
20550+2805 BU 367 AB 2006 127 145 0.3 8.31 9.00 G1V NOD 205502.33+280526.4
20550+2805 BU 367 AB 2007 128 144 0.3 8.31 9.00 G1V NOD 205502.41+280525.6
20550+2805 BU 367 AB 2012 130 161 0.2 8.31 9.00 G1V NOD 205502.41+280525.6
20550+2805 BU 367 AB 2018 126 194 0.2 8.31 9.00 G1V NO 205502.41+280525.6
20550+2805 BU 367 AB 2021 130 224 0.1 8.31 9.00 G1V NO 205502.41+280525.6

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

 
 
WDS 20550+2805 BU 367 AB : VISUAL OBSERVATIONS REPORTS
 
 
No records found.


 
 
WDS 20550+2805 BU 367 AB : MEASURES
 
 
No records found.

 
 
WDS 20550+2805 : VIRTUAL EYEPIECE
 
 

20550+2805 BU 367A mag 8.31 Sp G1V 20550+2805 BU 367B sep 0.1 P.A. 220.80 mag 9 20550+2805 BU 367C sep 38.0 P.A. 358.50 mag 12.3 20550+2805 BU 367D sep 17.7 P.A. 63.90 mag 15 20550+2805 A 3109E sep 45.7 P.A. 47.60 mag 13.5 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 20550+2805 : ALADIN DSS IMAGE @ 20h 55m 02.41s +28° 05' 25.6"
 
 
 
 
WDS 20550+2805 BU 367 AB : NEIGHBORHOODS
 
 
FoV:
Limit:
Primaries only

20550+2805 BU 367AB distance=0' 20551+2808 COU 831 distance=3' 20559+2804 MLB 614 distance=12' 20562+2816 MLB 615 distance=19' 20537+2803 HJ 1589 distance=19' 20535+2751 MLB 572 distance=26' 20549+2740 TDT2627 distance=26' 20562+2826 GRV 397 distance=27' 20543+2740 TDT2619 distance=28' 20545+2736 MLB 714 distance=31' 20560+2735 HO 460AB distance=34' 20560+2735 HO 460AC distance=34' 20576+2802 HJ 1599 distance=34' 20556+2845 BRT 53 distance=40' 20523+2839 BRT 52 distance=50' 20539+2856 GRV 392 distance=53' 20565+2712 COU 832 distance=58' 20531+2856 MLB 535 distance=59' 20552+2705 ES 511 distance=61' 20599+2813 J 3122AB distance=63' 20599+2813 DAM 225AB,C distance=63' 20599+2813 DAM 225AB,D distance=63' 20563+2709 J 2331AB distance=64' 20563+2709 J 2331AC distance=64' 20596+2740 MLB 616 distance=65' 21001+2757 MLB 618 distance=67' 21001+2801 MLB 617 distance=67' 20565+2910 MLB 485AB distance=68' 20531+2909 STT 417AB distance=69' 20531+2909 STT 417AB,C distance=69' 20496+2819 GRV 385 distance=73' 20497+2825 MLB 534 distance=73' 21006+2829 COU1040AB distance=77' 20529+2920 BOW9002AB distance=80' 20529+2920 DAM 295AC distance=80' 20522+2917 KU 129AB distance=81' 20522+2917 KU 129AC distance=81' 20572+2921 J 794 distance=81' 20494+2840 CBL 86 distance=82' 20581+2917 HO 598 distance=82' 20582+2654 COU 833 distance=84' 21014+2808 MLB 619 distance=84' 21007+2844 BRT 54 distance=85' 20499+2711 HJ 1579 distance=87' 21017+2803 TDT2702 distance=88' 20486+2733 MLB 713 distance=92' 20534+2637 TDT2610 distance=92' 21020+2815 LDS2936 distance=92' 20481+2753 ES 510AB distance=93' 20483+2832 GRV 382 distance=93' 20481+2753 ES 510BC distance=93' 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 20550+2805 BU 367 AB 224 0.1
Show 20550+2805 A 3109 AB,E 51 49.2
Show 20550+2805 BU 367 AB,C 358 38.0
Show 20550+2805 BU 367 AB,D 67 19.6
Show 20551+2808 COU 831 289 1.3 3
Show 20559+2804 MLB 614 75 8.7 12
Show 20562+2816 MLB 615 200 3.6 19
Show 20537+2803 HJ 1589 325 11.3 19
Show 20535+2751 MLB 572 298 1.7 26
Show 20549+2740 TDT2627 79 1.1 26
Show 20562+2826 GRV 397 339 58.2 27
Show 20543+2740 TDT2619 312 0.5 28
Show 20545+2736 MLB 714 202 4.3 31
Show 20560+2735 HO 460 AB 112 13.3 34
Show 20560+2735 HO 460 AC 257 37.7 34
Show 20576+2802 HJ 1599 225 13.5 34
Show 20556+2845 BRT 53 25 2.6 40
Show 20523+2839 BRT 52 87 8.8 50
Show 20539+2856 GRV 392 3 33.8 53
Show 20565+2712 COU 832 261 1.3 58
Show 20531+2856 MLB 535 2 7.1 59
Show 20552+2705 ES 511 47 8.5 61
Show 20599+2813 J 3122 AB 53 2.3 63
Show 20599+2813 DAM 225 AB,C 323 10.2 63
Show 20599+2813 DAM 225 AB,D 305 9.3 63
Show 20563+2709 J 2331 AB 213 6.7 64
Show 20563+2709 J 2331 AC 254 8.5 64
Show 20596+2740 MLB 616 233 4.1 65
Show 21001+2757 MLB 618 339 7.3 67
Show 21001+2801 MLB 617 331 8.6 67
Show 20565+2910 MLB 485 AB 154 4.5 68
Show 20531+2909 STT 417 AB 27 0.9 69
Show 20531+2909 STT 417 AB,C 108 30.8 69
Show 20496+2819 GRV 385 40 51.0 73
Show 20497+2825 MLB 534 134 5.3 73
Show 21006+2829 COU1040 AB 347 1.5 77
Show 20529+2920 BOW9002 AB 354 9.9 80
Show 20529+2920 DAM 295 AC 37 22.2 80
Show 20522+2917 KU 129 AB 103 15.1 81
Show 20522+2917 KU 129 AC 39 46.1 81
Show 20572+2921 J 794 134 3.2 81
Show 20494+2840 CBL 86 317 53.7 82
Show 20581+2917 HO 598 125 16.2 82
Show 20582+2654 COU 833 253 2.4 84
Show 21014+2808 MLB 619 218 5.4 84
Show 21007+2844 BRT 54 358 7.0 85
Show 20499+2711 HJ 1579 130 3.8 87
Show 21017+2803 TDT2702 25 2.6 88
Show 20486+2733 MLB 713 348 7.3 92
Show 20534+2637 TDT2610 209 0.9 92
Show 21020+2815 LDS2936 237 4.4 92

 
 
WDS 20550+2805 : COMPONENTS
 
 
  A B C D
B pa=220.8°
sep=0.14"
 
C pa=358.5°
sep=38.01"
pa=358.6°
sep=38.11"
 
D pa=63.9°
sep=17.68"
pa=63.7°
sep=17.80"
pa=150.8°
sep=34.60"
 
E pa=47.6°
sep=45.74"
pa=47.5°
sep=45.87"
pa=101.6°
sep=35.46"
pa=37.8°
sep=29.20"
 
 
20550+2805 A
 
 
Coord arcsec 2000 205502.41+280525.6 Mag 8.31 Spectral class G1V (yellow) PmRA 109.00
PmDE -81.0 SAO 89278 HIP 103247 Tycho2 2179-00116-1
HD 199221 GC 29194 ADS 14424 BD BD+27 3915
Tycho2
Tycho2 2179-00116-1 Pflag RAmdeg 313.76005683 DEmdeg 28.09045258
PmRA 108.8 PmDE -81.3 E RAmdeg 5 E DEmdeg 5
E pmRA 1.3 E pmDE 1.2 EpRAm 1991.31 EpDEm 1991.30
Num 11 Q RAmdeg 0.8 Q DEmdeg 0.6 Q pmRA 0.8
Q pmDE 0.7 BTmag 8.670 E BTmag 0.016 VTmag 7.914
E VTmag 0.011 Prox 999 TYC T HIP 103247
CCDM AB RAdeg 313.75976972 DEdeg 28.09064278 EpRA 1990 1.62
EpDE 1990 1.58 E RAdeg 5.1 E DEdeg 5.2 Posflg P
Corr 0.0
SAO
SAO 89278 DelFlag RA1950 PmRA1950 0.0072
DE1950 PmDE1950 -0.082 Vmag 8 SpType G5
Double code Source 70 CatNum 29194 DM BD+27 3915
DMcomp BDsup HD 199221 M HD 0
GC 29194 RA1950rad 5.46680128 DE1950rad 0.4869453 PmRA2000 0.0073
PmDE2000 -0.085
Hipparcos
Catalog H HIP 103247 Proxy H RAhms 20 55 02.33
DEdms +28 05 26.4 Vmag 7.8 VarFlag R Vmag H
RAdeg 313.76 DEdeg 28.0907 AstroRef A Plx 14.65
CCDM 20550+2806 N CCDM I Nsys 1 Ncomp 2
MultFlag C Source Qual A M HIP AB
Theta 125 Rho 0.482 HD 199221 BD BD+27 3915
CD CP Dm number +27 3915 VIred 0.74
SpType G1V R SpType Coord arcsec 2000 205502.33+280526.4
Hipparcos 2
HIP 103247 Sn 15 So 3 Nc 2
RArad 5.4761400744 DErad 0.4902747854 Plx 16.1 PmRA 113.52
PmDE -77.93 E RArad 0.86 E DErad 0.72 E Plx 1.13
E pmRA 0.89 E pmDE 0.83 Hpmag 7.9391 E Hpmag 0.0015
SHp 0.015 VA 0 BV 0.674 E BV 0.009
VI 0.73
 
 
20550+2805 B
 
 
Coord arcsec 2000 205502.40+280525.5 Mag 9 PmRA 109.00 PmDE -81.0
Calc delta mag 0.69 Calc coord yes
 
 
20550+2805 C
 
 
Coord arcsec 2000 205502.33+280603.6 Mag 12.3 PmRA 16.00 PmDE -1.0
Calc delta mag 3.99 Calc coord yes
 
 
20550+2805 D
 
 
Coord arcsec 2000 205503.61+280533.4 Mag 15 PmRA 1.00 PmDE -7.0
Calc delta mag 6.69 Calc coord yes
 
 
20550+2805 E
 
 
Coord arcsec 2000 205504.96+280556.5 Mag 13.5 PmRA 109.00 PmDE 63.0
Calc delta mag 5.19 Calc coord yes