03342+4837 BU 787 AB (HD 21931)

 
 
03h 34m 12.97s +48° 37' 02.9" P.A. 293.00 sep 5.2 mag 7.38,11.90 Sp B9.5V dist. 261.1 pc (851.71 l.y.)
 
 
Coord 2000 03342+4837 Discov num BU  787 Comp AB Coord arcsec 2000 03 34 12.97 +48 37 02.9
Date first 1881 Date last 2016 Obs 20
Pa first 229 Pa last 293.1 P.A. Now (θ) 293.1°
Sep first 2.1 Sep last 5.17 Sep. Now (ρ) 5.17"
Mag pri 7.38 Mag sec 11.90 delta mag (ΔM) 4.52 Spectral class B9.5V (blue-white)
Pri motion ra +023 Sec motion ra
Pri motion dec -027 Sec motion dec
Notes N O (See Notes, Orbital solution)
This double is physical.
 
 
03342+4837 SYSTEM COMPONENTS
 
 
Show name SAO coord wds_name last obs pa sep mag1 mag2 d_mag orb current
Show HD 21931 38946 03 34 13 +48 37 03 BU 787 AB 2016 20 293 5.2 7.38 11.90 4.52 Y <===
Show 38946 03 34 13 +48 37 03 BU 787 AD 2016 14 181 34.5 7.38 11.75 4.37
Show 38946 03 34 13 +48 37 03 ARN 57 AE 2015 14 29 175.2 7.38 8.81 1.43
Quadruple system
4 estimated visually detectable stars in this system
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Name HD 21931 Constellation Perseus SAO 38946 HIP 16649
Tycho2 3317-00589-1 Gaia DR2 249282105184992384 HD 21931 ADS 2609
BD BD+48 949 Distance 261.1 Distance ly 851.71
 
 
ORBITAL ELEMENTS
 
 
Period (P)1789.0608y± 794.8903 Periastron (T)1762.567y± 326.8226 Semi-major axis (a)13.62295a± 7.90366
Eccentricity (e)0.83271± 0.12449 Inclination (i)76.999°± 8.893 Longitude of periastron (ω)314.554°± 62.796
Node (Ω)153.189°± 25.712 Notesn ReferenceIzm2019
Equinox Last observation2015 Grade5(1=Definitive, 9=Indet.)
label theta rho
2000 290.6 4.736
2001 290.8 4.765
2002 291.0 4.793
2003 291.2 4.822
2004 291.4 4.851
2005 291.6 4.879
2006 291.8 4.908
2007 292.0 4.937
2008 292.2 4.965
2009 292.4 4.994
2010 292.6 5.023
2011 292.7 5.051
2012 292.9 5.080
2013 293.1 5.109
2014 293.3 5.138
2015 293.4 5.166
2016 293.6 5.195
2017 293.8 5.224
2018 294.0 5.252
2019 294.1 5.281
2020 294.3 5.310
2021 294.5 5.339
2022 294.6 5.367
2023 294.8 5.396
2024 294.9 5.425
2025 295.1 5.454
2026 295.3 5.482
2027 295.4 5.511
2028 295.6 5.540
2029 295.7 5.568
2030 295.9 5.597


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



 
 


wds03342%2B4837d.png orbit plot
Measures: green=micrometric, blue=interferometric, purple=photographic
 
 
 
WDS 03342+4837 BU 787 AB (HD 21931) : NOTES
 
 
discov_num notes refcode
BU 787 Burnham notes: "Hussey measures a third star, 175.8deg, 12.70arcsec Hu_1903b
(1898.70) 1n. I could not see this on one night with the 40-inch, but
measured 11m star in nearly the same direction, 175.6deg, 36.78arcsec
(1899.13) 1n." Bu_1906
C does not exist. B__1960b
AB: Rectilinear solution by Cvetkovic (2011). Cve2011c
Despite having an orbit, an optical pair based on parallax. Mlk2022
 
 
REFERENCES
 
 
refcode metd author reference
B__1960b Ma j van den Bos, W.H. 1960PYerO...9....1B
B__1960b +Mb Pub. Yerkes Obs. 9, pt. 1, 1960
Bu_1906 Ma j Burnham, S.W. 1906QB821.B972.....
Bu_1906 +M Burnham Double Star Cat., 1906
Cve2011c C j Cvetkovic, Z., Pavlovic, R. & Damljanovic, G. & Boeva, S. 2011AJ....142...73C
Cve2011c +orb AJ 142, 73, 2011
Cve2011c +lin
Hu_1903b Ma j Hussey, W.J. 1903LicOB...2..115H
Hu_1903b Lick Obs. Bull. 2, 115, 1903
Izm2019 orb u Izmailov, I.S. 2019AstL...45...30I
Izm2019 Ast. Lett. 45, 30, 2019
Izm2019 (Orbital elements from weighted solutions used when available (Table 2),
Izm2019 unweighted elements (Table 1) used for remaining 29 systems.)
Mlk2022 not - Chulkov, D. & Malkov, O. 2022MNRAS.517.2925C
Mlk2022 MNRAS 517, 2925, 2022
 
 
DISCOVERER
 
 
idgroup discov author
1 ARN Arnold, D.
100 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
03342+4837 BU 787 AB 1999 16 288 4.5 7.38 11.90 B9.5V NOD 033412.97+483702.9
03342+4837 BU 787 AB 2010 17 291 4.7 7.38 11.90 B9.5V NOD 033412.97+483702.9
03342+4837 BU 787 AB 2016 18 293 5.2 7.38 11.90 B9.5V NO 033412.97+483702.9

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

 
 
WDS 03342+4837 BU 787 AB (HD 21931) : VISUAL OBSERVATIONS REPORTS
 
 
No records found.


 
 
WDS 03342+4837 BU 787 AB (HD 21931) : MEASURES
 
 
No records found.

 
 
WDS 03342+4837 (HD 21931) : VIRTUAL EYEPIECE
 
 

03342+4837 BU  787A mag 7.38 Sp B9.5V 03342+4837 BU  787B sep 3.7 P.A. 302.80 mag 11.9 03342+4837 BU  787D sep 34.5 P.A. 180.70 mag 11.75 03342+4837 ARN  57E sep 163.1 P.A. 20.30 mag 8.81 virtual eyepiece
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Radius:
Components only
 
 
WDS 03342+4837 (HD 21931) : ALADIN DSS IMAGE @ 03h 34m 12.97s +48° 37' 02.9"
 
 
 
 
WDS 03342+4837 BU 787 AB (HD 21931) : NEIGHBORHOODS
 
 
FoV:
Limit:
Primaries only


03342+4837  BU  787AB distance=0' 03355+4847  BVD 190 distance=17' 03319+4844  PAT  41 distance=25' 03367+4840  HU  102 distance=25' 03315+4900  PAT  40Aa,Ab distance=36' 03315+4900  MET  28AB distance=36' 03322+4908  PAT  42 distance=38' 03304+4825  PAT  39 distance=41' 03372+4905  ES   54 distance=41' 03321+4801  BAG  40 distance=42' 03377+4807  HLD   9AB distance=47' 03377+4807  HLD   9AC distance=47' 03316+4752  STT  56AB distance=53' 03316+4752  WAL  23AC distance=53' 03395+4849  SKF2402 distance=55' 03290+4814  PAT  38 distance=57' 03283+4840  SKF2335AB distance=59' 03283+4840  SKF2335BC distance=59' 03285+4857  ES 1136 distance=60' 03373+4743  TDS2602 distance=63' 03406+4842  J   891 distance=64' 03276+4825  PAT  34 distance=67' 03288+4916  PAT  37 distance=67' 03351+4945  MET  29AB distance=69' 03351+4945  MET  29AC distance=69' 03351+4945  MET  29AD distance=69' 03351+4945  MET  29AE distance=69' 03351+4945  MET  29AF distance=69' 03284+4915  PAT  36 distance=69' 03294+4931  BU 1179 distance=72' 03378+4943  WFC 250 distance=75' 03329+4951  PAT  43 distance=75' 03306+4947  HLD   8 distance=79' 03264+4820  PAT  33 distance=80' 03426+4833  BVD 191 distance=84' 03263+4914  PAT  32 distance=86' 03255+4830  PAT  31 distance=87' 03248+4852  PAT  30AB distance=95' 03248+4852  MET  27AC distance=95' 03248+4852  MET  27AD distance=95' 03248+4852  MET  27AE distance=95' 03248+4852  MET  27AF distance=95' 03248+4853  PAT  29AB distance=95' 03248+4853  PAT  29AC distance=95' 03248+4853  PAT  29AD distance=95' 03298+5001  COU2265Aa,Ab distance=95' 03298+5001  ES 2599AB distance=95' 03244+4848  PAT  27 distance=98' 03441+4831  BU 1182AB distance=99' 03441+4831  BU 1182AC distance=99' 03283+4957  PAT  35 distance=99' grafico limitrofi
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Show name coord_2000 discov# comp pa sep dist(')
Show 03342+4837 BU 787 AB 293 5.2
Show 03342+4837 BU 787 AD 181 34.5
Show 03342+4837 ARN 57 AE 29 175.2
Show 03355+4847 BVD 190 67 14.8 17
Show 03319+4844 PAT 41 350 0.1 25
Show 03367+4840 HU 102 64 3.2 25
Show 03315+4900 PAT 40 Aa,Ab 91 0.1 36
Show 03315+4900 MET 28 AB 109 3.1 36
Show 03322+4908 PAT 42 51 2.1 38
Show 03304+4825 PAT 39 66 5.4 41
Show 03372+4905 ES 54 251 4.6 41
Show 03321+4801 BAG 40 260 0.1 42
Show 03377+4807 HLD 9 AB 55 1.3 47
Show 03377+4807 HLD 9 AC 65 55.5 47
Show 03316+4752 STT 56 AB 352 33.4 53
Show 03316+4752 WAL 23 AC 47 45.6 53
Show 03395+4849 SKF2402 27 4.2 55
Show 03290+4814 PAT 38 234 1.6 57
Show 03283+4840 SKF2335 AB 348 71.0 59
Show 03283+4840 SKF2335 BC 242 7.4 59
Show 03285+4857 ES 1136 353 9.6 60
Show 03373+4743 TDS2602 83 0.8 63
Show 03406+4842 J 891 233 3.2 64
Show 03276+4825 PAT 34 350 0.1 67
Show 03288+4916 PAT 37 79 1.9 67
Show 03351+4945 MET 29 AB 29 2.2 69
Show 03351+4945 MET 29 AC 247 5.3 69
Show 03351+4945 MET 29 AD 324 6.2 69
Show 03351+4945 MET 29 AE 280 6.2 69
Show 03351+4945 MET 29 AF 113 10.1 69
Show 03284+4915 PAT 36 35 3.0 69
Show 03294+4931 BU 1179 141 0.6 72
Show 03378+4943 WFC 250 68 11.1 75
Show 03329+4951 PAT 43 337 0.5 75
Show 03306+4947 HLD 8 177 2.4 79
Show 03264+4820 PAT 33 315 0.5 80
Show 03426+4833 BVD 191 338 7.5 84
Show 03263+4914 PAT 32 357 0.4 86
Show 03255+4830 PAT 31 337 4.4 87
Show 03248+4852 PAT 30 AB 46 7.3 95
Show 03248+4852 MET 27 AC 313 10.2 95
Show 03248+4852 MET 27 AD 108 12.5 95
Show 03248+4852 MET 27 AE 110 12.4 95
Show 03248+4852 MET 27 AF 224 10.4 95
Show 03248+4853 PAT 29 AB 98 0.3 95
Show 03248+4853 PAT 29 AC 163 4.6 95
Show 03248+4853 PAT 29 AD 8 5.4 95
Show 03298+5001 COU2265 Aa,Ab 283 0.7 95
Show 03298+5001 ES 2599 AB 299 19.2 95
Show 03244+4848 PAT 27 198 3.5 98
Show 03441+4831 BU 1182 AB 261 4.7 99

 
 
WDS 03342+4837 : COMPONENTS
 
 
  A B D
B pa=302.8°
sep=3.74"
 
D pa=180.7°
sep=34.47"
pa=175.7°
sep=36.60"
 
E pa=20.3°
sep=163.06"
pa=21.6°
sep=162.29"
pa=16.9°
sep=195.87"
 
 
03342+4837 A
 
 
Name HD 21931 Coord arcsec 2000 033412.97+483702.9 Mag 7.38 Spectral class B9.5V (blue-white)
PmRA 23.00 PmDE -27.0 SAO 38946 HIP 16649
Tycho2 3317-00589-1 HD 21931 BD BD+48 949
Tycho2
Tycho2 3317-00589-1 Pflag RAmdeg 53.55402109 DEmdeg 48.61747226
PmRA 22.5 PmDE -27.2 E RAmdeg 5 E DEmdeg 5
E pmRA 1.5 E pmDE 1.6 EpRAm 1991.56 EpDEm 1991.37
Num 9 Q RAmdeg 1.4 Q DEmdeg 0.4 Q pmRA 1.4
Q pmDE 0.3 BTmag 7.396 E BTmag 0.015 VTmag 7.381
E VTmag 0.011 Prox 984 TYC T HIP 16649
CCDM RAdeg 53.55394333 DEdeg 48.61753556 EpRA 1990 1.78
EpDE 1990 1.62 E RAdeg 4.5 E DEdeg 5.0 Posflg
Corr -0.1
SAO
SAO 38946 DelFlag RA1950 PmRA1950 0.0009
DE1950 PmDE1950 -0.008 Vmag 7.8 SpType A0
Double code Source 3 CatNum 415 DM BD+48 949
DMcomp BDsup HD 21931 M HD 0
GC RA1950rad 0.91910255 DE1950rad 0.84562688 PmRA2000 0.0009
PmDE2000 -0.011
Hipparcos
Catalog H HIP 16649 Proxy RAhms 03 34 12.95
DEdms +48 37 03.1 Vmag 7.35 VarFlag R Vmag G
RAdeg 53.5539 DEdeg 48.6175 AstroRef Plx 3.59
CCDM 03342+4837 N CCDM I Nsys 1 Ncomp 1
MultFlag Source Qual S M HIP
Theta Rho HD 21931 BD BD+48 949
CD CP Dm number +48 949 VIred 0.05
SpType B9V R SpType Coord arcsec 2000 033412.95+483703.1
Hipparcos 2
HIP 16649 Sn 5 So 0 Nc 1
RArad 0.9346925464 DErad 0.8485361365 Plx 3.83 PmRA 18.84
PmDE -32.17 E RArad 0.51 E DErad 0.49 E Plx 0.72
E pmRA 0.73 E pmDE 0.68 Hpmag 7.3655 E Hpmag 0.0013
SHp 0.011 VA 0 BV 0.038 E BV 0.005
VI 0.05
CCDM
Ccdm 03342+4837 RComp Comp A Note1
Note2 Discov num DRAs 0.95 DDEs 3.1
R dRAs 65 Year Theta Rho
Obs 4 Vmag 7.2 Sp A0 PmNote *
PmRA 23 PmDE -21 Dm number +48 949 Cat1 BD
Name2 +48 415 Cat2 AGK2/3 HD 21931 M HD
ADS BDS A 2609 M ADS BDS N IDS IDS 03272N4817A
HIC 16649
 
 
03342+4837 B
 
 
Coord arcsec 2000 033412.65+483704.9 Mag 11.9 Calc delta mag 4.52 Calc coord yes
CCDM
Ccdm 03342+4837 RComp Comp B Note1 *
Note2 Discov num BU 787 DRAs DDEs
R dRAs Year 1958 Theta 282 Rho 3.8
Obs 12 Vmag 11.2 Sp PmNote
PmRA PmDE Dm number Cat1
Name2 Cat2 HD M HD
ADS BDS A 2609 M ADS BDS N IDS IDS 03272N4817B
HIC 16649
 
 
03342+4837 D
 
 
Coord arcsec 2000 033412.93+483628.4 Mag 11.75 PmRA 22.00 PmDE 18.0
Calc delta mag 4.37 Calc coord yes
CCDM
Ccdm 03342+4837 RComp Comp D Note1
Note2 Discov num BU 787 DRAs 0.96 DDEs -31.6
R dRAs 65 Year 1958 Theta 178 Rho 35.6
Obs 5 Vmag 10.3 Sp PmNote
PmRA PmDE Dm number Cat1
Name2 Cat2 HD M HD
ADS BDS A 2609 M ADS BDS N IDS IDS 03272N4817D
HIC
 
 
03342+4837 E
 
 
Coord arcsec 2000 033418.67+483935.9 Mag 8.81 PmRA 21.00 PmDE -28.0
Calc delta mag 1.43 Calc coord yes