20591+0418 STF 2737 BC

 
 
20h 59m 04.46s +04° 17' 36.6" P.A. 66.00 sep 10.6 mag 6.31,7.05 Sp F6IV dist. 54.08 pc (176.41 l.y.)
 
 
Coord 2000 20591+0418 Discov num STF2737 Comp BC Coord arcsec 2000 20 59 04.46 +04 17 36.6
Date first 1780 Date last 2019 Obs 19
Pa first 84 Pa last 65.6 P.A. Now (θ) 65.6°
Sep first 9.4 Sep last 10.578 Sep. Now (ρ) 10.578"
Mag pri 6.31 Mag sec 7.05 delta mag (ΔM) 0.74 Spectral class F6IV (yellow-white)
Pri motion ra -113 Sec motion ra -113
Pri motion dec -150 Sec motion dec -150
Notes N V (See Notes, Proper motion indicates physical)
This double is physical.
 
 
20591+0418 SYSTEM COMPONENTS
 
 
Show name SAO coord wds_name last obs pa sep mag1 mag2 d_mag orb current
Show 126428 20 59 05 +04 17 38 STF 2737 AB 2021 487 125 0.0 5.96 6.31 0.35 Y
Show Eps Equ 126428 20 59 05 +04 17 38 STF 2737 AB,C 2019 306 67 10.6 5.30 7.05 1.75
Show 126428 20 59 05 +04 17 38 STF 2737 AD 2013 4 293 69.3 5.96 13.10 7.14
Show 126428 20 59 04 +04 17 37 STF 2737 BC 2019 19 66 10.6 6.31 7.05 0.74 <===
Quadruple system
5 estimated visually detectable stars in this system
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Constellation Equuleus SAO 126428 HIP 103569 Tycho2 0521-02814-2
HD 199766 HR 8034 GC 29276 ADS 14499
BD BD+03 4473 Bayer Epsilon Equulei Bayer name Eps Equ Flamsteed 1 Equulei
Flamsteed name 1 Equ Distance 54.08 Distance ly 176.41 Bayer greek ε Equ
 
 
WDS 20591+0418 STF 2737 BC : NOTES
 
 
discov_num notes refcode
STF2737 eps Equ = 1 Equ. Primary is 2.03d SB1. Tok2006
AC: Star C (mag. 7.3, dF4) is in slow retrograde motion at 10".
Period of AC estimated at 5200y. Tok2006
AB,C: Hyperbolic orbit by Zeller (1965). Ephemeris covers 1831-2042. Zel1965
sigma = areal constant in the true orbit = 0.1952 arcsec^2/yr
q = periastron distance in the true orbit = 10".78
AB,C: HJL 288. HJL1986
BC: H 3 21. MEv2010
AB: Malkov et al. (2012) derive dynamical, photometric, and
spectroscopic masses 4.17 +/- 2.42, 2.73, and 1.33 Msun, respectively. Mlk2012
 
 
REFERENCES
 
 
refcode metd author reference
HJL1986 Pa - Halbwachs, J.L. 1986A&AS...66..131H
HJL1986 A&AS 66, 131, 1986
HJL1986 (Possible CPM pairs from AGK2/3. Coarse astrometry, incl. mean 1950 dates, added
HJL1986 only for previously unknown pairs. Table 1: HJL 1 - 326, Table 2: HJL1001 - 1113)
MEv2010 - MacEvoy, B. ...................
MEv2010 private communication, 2010 (see http://www.handprint.com/ASTRO/index.html)
Mlk2012 not - Malkov, O.Yu., Tamazian, V.S., Docobo, J.A., & Chulkov, D.A. 2012A&A...546A..69M
Mlk2012 A&A 546, A69, 2012
Tok2006 A j Tokovinin, A., Thomas, S., Sterzik, M., & Udry, S. 2006A&A...450..681T
Tok2006 +E2 A&A 450, 681, 2006
Zel1965 orb - Zeller, G. 1965AnWie..26..111Z
Zel1965 Ann. Sternw. Wien 26, 111, 1965
 
 
DISCOVERER
 
 
idgroup discov author
1 STF Struve, F.G.W.
 
 
WDS HISTORIC DATA
 
 
coord_2000 discov_num comp epoch obs pa sep mag_pri mag_sec spectr notes coord_arcsec_2000
20591+0418 STF2737 BC 2006 12 67 10.5 6.31 7.05 N D 205904.46+041736.6
20591+0418 STF2737 BC 2011 13 67 10.5 6.31 7.05 N D 205904.46+041736.6
20591+0418 STF2737 BC 2012 15 67 10.5 6.31 7.05 N D 205904.46+041736.6
20591+0418 STF2737 BC 2014 18 67 10.5 6.31 7.05 F6IV NV 205904.46+041736.6
20591+0418 STF2737 BC 2019 19 66 10.6 6.31 7.05 F6IV NV 205904.46+041736.6

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

 
 
WDS 20591+0418 STF 2737 BC : VISUAL OBSERVATIONS REPORTS
 
 
No records found.


 
 
WDS 20591+0418 STF 2737 BC : MEASURES
 
 
No records found.

 
 
WDS 20591+0418 : VIRTUAL EYEPIECE
 
 

20591+0418 STF2737A mag 5.96 Sp F6IV 20591+0418 STF2737B sep 1.7 P.A. 224.90 mag 6.31 Sp F6IV 20591+0418 STF2737C sep 10.6 P.A. 66.40 mag 7.05 Sp dF4 20591+0418 STF2737D sep 69.1 P.A. 292.90 mag 13.1 virtual eyepiece
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Radius:
Components only
 
 
WDS 20591+0418 : ALADIN DSS IMAGE @ 20h 59m 04.46s +04° 17' 36.6"
 
 
 
 
WDS 20591+0418 STF 2737 BC : NEIGHBORHOODS
 
 
FoV:
Limit:
Primaries only


20591+0418  STF2737BC distance=1' 20591+0418  STF2737AB distance=1' 20591+0418  STF2737AD distance=1' 20591+0418  STF2737AB,C distance=1' 20580+0420  UC 4346 distance=17' 21002+0406  HEI 820 distance=21' 20582+0356  BAR  13AB distance=25' 20582+0356  BAR  13AC distance=25' 20582+0356  WSI  39AD distance=25' 20582+0356  WSI  39CD distance=25' 21009+0419  BAL2553 distance=27' 20581+0352  BAL2550 distance=30' 20582+0447  AG  268 distance=33' 20564+0422  CVR 877 distance=41' 21020+0436  CVR 884 distance=48' 20559+0435  UC 4332 distance=50' 20557+0432  STF2735 distance=53' 21020+0346  HO  148 distance=55' 21032+0411  BAL2554 distance=63' 21021+0329  CVR 236 distance=67' 21024+0513  A   615 distance=74' 20541+0357  HJ 3005 distance=77' 21041+0359  TOK 371 distance=78' 21017+0310  BAL2042 distance=79' 20552+0314  BAL2040 distance=86' 21009+0257  HJ 3006 distance=86' 20551+0314  UC 4324 distance=87' 20561+0535  TDT2642 distance=89' 20537+0336  BAL2548 distance=91' 20543+0321  BAL2039 distance=92' 20530+0427  TDT2603 distance=92' 21014+0542  ELP  47 distance=92' 20595+0242  HJ  928 distance=97' 21047+0332  SE    3Aa,Ab distance=97' 21047+0332  STF2749A,BC distance=97' 21047+0332  SE    3AD distance=97' 21047+0332  STF2749AC distance=97' 21047+0332  SE    3BC distance=97' 20525+0416  TDT2595 distance=99' 21006+0554  GRV 403 distance=101' 20529+0337  BAL2547 distance=101' 20588+0600  UC 4347 distance=103' 21041+0300  WSI   6AB distance=109' 21041+0300  DSG   6Aa,Ab distance=109' 21046+0530  BUP 223 distance=110' 21033+0245  BAL2043 distance=113' 20516+0431  KPP1501 distance=113' 20535+0300  HEI 819 distance=114' 20528+0311  HLD  43 distance=115' 20526+0517  GCB  75 distance=115' 20529+0529  GCB  60 distance=118' grafico limitrofi
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Show name coord_2000 discov# comp pa sep dist(')
Show 20591+0418 STF2737 BC 66 10.6 1
Show 20591+0418 STF2737 AB 125 0.0 1
Show 20591+0418 STF2737 AD 293 69.3 1
Show 20591+0418 STF2737 AB,C 67 10.6 1
Show 20580+0420 UC 4346 205 22.4 17
Show 21002+0406 HEI 820 65 2.3 21
Show 20582+0356 BAR 13 AB 87 1.6 25
Show 20582+0356 BAR 13 AC 249 20.6 25
Show 20582+0356 WSI 39 AD 280 26.4 25
Show 20582+0356 WSI 39 CD 330 13.6 25
Show 21009+0419 BAL2553 110 10.6 27
Show 20581+0352 BAL2550 157 3.4 30
Show 20582+0447 AG 268 287 12.5 33
Show 20564+0422 CVR 877 125 26.3 41
Show 21020+0436 CVR 884 312 11.4 48
Show 20559+0435 UC 4332 60 52.9 50
Show 20557+0432 STF2735 282 2.0 53
Show 21020+0346 HO 148 201 2.2 55
Show 21032+0411 BAL2554 307 21.3 63
Show 21021+0329 CVR 236 279 69.7 67
Show 21024+0513 A 615 129 3.5 74
Show 20541+0357 HJ 3005 300 30.5 77
Show 21041+0359 TOK 371 272 0.1 78
Show 21017+0310 BAL2042 128 8.1 79
Show 20552+0314 BAL2040 68 8.4 86
Show 21009+0257 HJ 3006 292 1.8 86
Show 20551+0314 UC 4324 290 9.9 87
Show 20561+0535 TDT2642 77 0.6 89
Show 20537+0336 BAL2548 258 7.5 91
Show 20543+0321 BAL2039 28 14.7 92
Show 20530+0427 TDT2603 281 1.7 92
Show 21014+0542 ELP 47 25 6.3 92
Show 20595+0242 HJ 928 74 16.5 97
Show 21047+0332 SE 3 Aa,Ab 153 0.6 97
Show 21047+0332 STF2749 A,BC 179 3.2 97
Show 21047+0332 SE 3 AD 78 114.3 97
Show 21047+0332 STF2749 AC 176 3.5 97
Show 21047+0332 SE 3 BC 136 0.7 97
Show 20525+0416 TDT2595 359 0.7 99
Show 21006+0554 GRV 403 116 33.5 101
Show 20529+0337 BAL2547 220 8.5 101
Show 20588+0600 UC 4347 31 40.4 103
Show 21041+0300 WSI 6 AB 53 0.1 109
Show 21041+0300 DSG 6 Aa,Ab 155 0.0 109
Show 21046+0530 BUP 223 252 82.5 110
Show 21033+0245 BAL2043 205 18.4 113
Show 20516+0431 KPP1501 50 11.3 113
Show 20535+0300 HEI 819 135 0.2 114
Show 20528+0311 HLD 43 9 2.2 115
Show 20526+0517 GCB 75 101 3.3 115
Show 20529+0529 GCB 60 152 6.5 118

 
 
WDS 20591+0418 : COMPONENTS
 
 
  A B C
B pa=224.9°
sep=1.69"
 
C pa=66.4°
sep=10.56"
pa=63.5°
sep=12.15"
 
D pa=292.9°
sep=69.12"
pa=294.2°
sep=68.51"
pa=287.1°
sep=76.78"
 
 
20591+0418 A
 
 
Coord arcsec 2000 205904.54+041737.8 Mag 5.96 Spectral class F6IV (yellow-white) PmRA -102.00
PmDE -152.0 SAO 126428 HIP 103569 Tycho2 0521-02814-1
HD 199766 HR 8034 GC 29276 ADS 14499
BD BD+03 4473 Bayer Epsilon Equulei Bayer name Eps Equ Flamsteed 1 Equulei
Flamsteed name 1 Equ
Tycho2
Tycho2 0521-02814-1 Pflag P RAmdeg 314.76857872 DEmdeg 4.29350516
PmRA -102.0 PmDE -152.0 E RAmdeg 4 E DEmdeg 4
E pmRA 1.4 E pmDE 1.4 EpRAm 1991.69 EpDEm 1991.18
Num 6 Q RAmdeg 2.2 Q DEmdeg 1.5 Q pmRA 2.2
Q pmDE 1.4 BTmag 6.482 E BTmag 0.014 VTmag 5.963
E VTmag 0.010 Prox 9 TYC T HIP 103569
CCDM A RAdeg 314.76890806 DEdeg 4.29385139 EpRA 1990 1.80
EpDE 1990 1.30 E RAdeg 3.6 E DEdeg 4.0 Posflg D
Corr -0.1
SAO
SAO 126428 DelFlag RA1950 PmRA1950 -0.0075
DE1950 PmDE1950 -0.144 Vmag 5.3 SpType F5
Double code Source 70 CatNum 29276 DM BD+03 4473
DMcomp AB BDsup HD 199766 M HD 0
GC 29276 RA1950rad 5.48284295 DE1950rad 0.07157063 PmRA2000 -0.0073
PmDE2000 -0.148
Hipparcos
Catalog H HIP 103569 Proxy H RAhms 20 59 04.54
DEdms +04 17 37.8 Vmag 5.3 VarFlag R Vmag G
RAdeg 314.769 DEdeg 4.29385 AstroRef A Plx 16.59
CCDM 20591+0418 N CCDM I Nsys 2 Ncomp 2
MultFlag C Source P Qual A M HIP AB
Theta 286 Rho 0.935 HD 199766 BD BD+03 4473
CD CP Dm number +03 4473 VIred 0.55
SpType F5III... R SpType Coord arcsec 2000 205904.54+041737.8
Hipparcos 2
HIP 103569 Sn 15 So 3 Nc 2
RArad 5.493754204 DErad 0.0749417644 Plx 18.49 PmRA -115.75
PmDE -151.7 E RArad 1.31 E DErad 0.69 E Plx 1.35
E pmRA 1.52 E pmDE 0.7 Hpmag 5.314 E Hpmag 0.0013
SHp 0.016 VA 0 BV 0.464 E BV 0.027
VI 0.55
CCDM
Ccdm 20591+0418 RComp Comp A Note1
Note2 Discov num DRAs -1.55 DDEs -22.6
R dRAs 10 Year Theta Rho
Obs 4 Vmag 5.8 Sp F5 PmNote *
PmRA -117 PmDE -135 Dm number +03 4473 Cat1 BD
Name2 +04 2845 Cat2 AGK2/3 HD 199766 M HD
ADS BDS A14499 M ADS BDS N IDS IDS 20541N0355A
HIC 103569
 
 
20591+0418 B
 
 
Coord arcsec 2000 205904.46+041736.6 Coord calc 205904.46+041736.6 Mag 6.31 Spectral class F6IV (yellow-white)
PmRA -113.00 PmDE -150.0 Tycho2 0521-02814-2 Calc delta mag 0.35
Tycho2
Tycho2 0521-02814-2 Pflag P RAmdeg 314.76857872 DEmdeg 4.29350516
PmRA -102.0 PmDE -152.0 E RAmdeg 4 E DEmdeg 4
E pmRA 1.4 E pmDE 1.4 EpRAm 1991.69 EpDEm 1991.18
Num 6 Q RAmdeg 2.2 Q DEmdeg 1.5 Q pmRA 2.2
Q pmDE 1.4 BTmag 6.770 E BTmag 0.015 VTmag 6.313
E VTmag 0.010 Prox 9 TYC T HIP 103569
CCDM B RAdeg 314.76865694 DEdeg 4.29390639 EpRA 1990 1.79
EpDE 1990 1.32 E RAdeg 3.7 E DEdeg 4.3 Posflg D
Corr -0.1
CCDM
Ccdm 20591+0418 RComp Comp B Note1 *
Note2 Discov num STF2737 DRAs DDEs
R dRAs Year 1835 Theta Rho
Obs 99 Vmag 6.3 Sp PmNote
PmRA PmDE Dm number Cat1
Name2 Cat2 HD M HD
ADS BDS A14499 M ADS BDS N IDS IDS 20541N0355B
HIC 103569
 
 
20591+0418 C
 
 
Coord arcsec 2000 205905.19+041742.0 Mag 7.05 Spectral class dF4 PmRA -116.00
PmDE -144.0 HIP 103571 Tycho2 0521-02813-1 Calc delta mag 1.09
Calc coord yes
Tycho2
Tycho2 0521-02813-1 Pflag RAmdeg 314.77128060 DEmdeg 4.29461464
PmRA -115.6 PmDE -143.9 E RAmdeg 7 E DEmdeg 7
E pmRA 1.3 E pmDE 1.3 EpRAm 1991.34 EpDEm 1991.09
Num 10 Q RAmdeg 1.1 Q DEmdeg 1.3 Q pmRA 1.2
Q pmDE 1.2 BTmag 7.570 E BTmag 0.016 VTmag 7.052
E VTmag 0.011 Prox 103 TYC T HIP 103571
CCDM C RAdeg 314.77154611 DEdeg 4.29495306 EpRA 1990 1.76
EpDE 1990 1.54 E RAdeg 6.8 E DEdeg 7.3 Posflg
Corr 0.1
Hipparcos
Catalog H HIP 103571 Proxy RAhms 20 59 05.18
DEdms +04 17 41.9 Vmag 5.24 VarFlag R Vmag H
RAdeg 314.772 DEdeg 4.29498 AstroRef C Plx 16.59
CCDM 20591+0418 N CCDM I Nsys 2 Ncomp 1
MultFlag C Source F Qual A M HIP
Theta Rho HD BD
CD CP Dm number VIred 0.53
SpType G0V R SpType Coord arcsec 2000 205905.18+041741.9
Hipparcos 2
HIP 103571 Sn 15 So 3 Nc 1
RArad 5.4938002846 DErad 0.0749615489 Plx 17.68 PmRA -116.44
PmDE -152.18 E RArad 1.17 E DErad 0.69 E Plx 1.33
E pmRA 1.47 E pmDE 0.71 Hpmag 5.3441 E Hpmag 0.0094
SHp 0.094 VA 0 BV 0.457 E BV 0.029
VI 0.53
CCDM
Ccdm 20591+0418 RComp Comp C Note1
Note2 Discov num STF2737 DRAs -1.01 DDEs -20.1
R dRAs 10 Year 1959 Theta 070 Rho 10.5
Obs 99 Vmag 7.1 Sp PmNote *
PmRA -146 PmDE -151 Dm number Cat1
Name2 +04 2846 Cat2 AGK2/3 HD M HD
ADS BDS A14499 M ADS BDS N IDS IDS 20541N0355C
HIC 103571
 
 
20591+0418 D
 
 
Coord arcsec 2000 205900.28+041804.7 Mag 13.1 Calc delta mag 7.14 Calc coord yes
CCDM
Ccdm 20591+0418 RComp Comp D Note1
Note2 Discov num STF2737 DRAs DDEs
R dRAs Year 1924 Theta 280 Rho 74.8
Obs 2 Vmag 12.4 Sp PmNote
PmRA PmDE Dm number Cat1
Name2 Cat2 HD M HD
ADS BDS A14499 M ADS BDS N IDS IDS 20541N0355D
HIC