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Current system
04226+2538
STF 528 AB
Chi Tau


Nearby doubles
9' : 04220+2538
DAM 761

10' : 04219+2538
LDS1165

14' : 04236+2543
LDS5550

22' : 04236+2520
LDS1167

25' : 04233+2516
POU 444

32' : 04246+2556
LDS5552

36' : 04252+2545
TOK 247

38' : 04236+2503
MTZ 2

39' : 04243+2506
POU 447

43' : 04257+2545
LDS5557

44' : 04247+2610
KSA 17

44' : 04237+2456
ITO 25

51' : 04237+2450
POU 445

53' : 04202+2457
POU 439

55' : 04253+2618
WHT 1AB

61' : 04271+2542
THB 1

62' : 04181+2538
LDS1163AB

63' : 04222+2641
LDS5547

66' : 04269+2607
LEI 2AB

68' : 04271+2606
KSA 19AB

72' : 04278+2525
OCC9090

73' : 04206+2429
COU 704AB

74' : 04174+2559
LDS5533

75' : 04181+2621
TDS2814

78' : 04223+2655
KSA 16

79' : 04170+2557
LDS1160



Selections
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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.

04226+2538 STF 528 AB (Chi Tau)

 
 
04h 22m 34.94s +25° 37' 45.5" P.A. 25.00 sep 19.4 mag 5.37,8.54 Sp B9Vnn+F8V dist. 89.29 pc (291.26 l.y.)
 
 
Coord 2000 04226+2538 Discov num STF 528 Comp AB Coord arcsec 2000 04 22 34.94 +25 37 45.5
Date first 1822 Date last 2016 Obs 80
Pa first 27 Pa last 24.9 P.A. Now (θ) 24.9°
Sep first 19.7 Sep last 19.42 Sep. Now (ρ) 19.42"
Mag pri 5.37 Mag sec 8.54 delta mag (ΔM) 3.17 Spectral class B9Vnn+F8V (blue-white/yellow-white)
Pri motion ra +020 Sec motion ra +032
Pri motion dec -017 Sec motion dec +003
Notes N (See Notes)
rPM=0.726
Nature of this double is uncertain.
 
 
04226+2538 SYSTEM COMPONENTS
 
 
Show name SAO coord wds_name last obs pa sep mag1 mag2 d_mag orb current
Show Chi Tau 76573 04 22 35 +25 37 46 STF 528 AB 2016 80 25 19.4 5.37 8.54 3.17 <===
Show 04 22 36 +25 38 03 ITO 23 BC 2015 5 245 11.6 6.94 12.54 5.60
Show 04 22 36 +25 38 03 ITO 23 BD 2003 1 227 11.0 6.94 13.29 6.35
Show 04 22 36 +25 38 03 ITO 23 BE 2003 1 264 10.6 6.94 14.96 8.02
Quintuple system
5 estimated visually detectable stars in this system
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Name Chi Tau Constellation Taurus SAO 76573 HIP 20430
Tycho2 1820-01416-1 Gaia DR2 150461092453366528 HD 27638 HR 1369
GC 5292 ADS 3161 BD BD+25 707 Bayer Chi Tauri
Bayer name Chi Tau Flamsteed 59 Tauri Flamsteed name 59 Tau Distance 89.29
Distance ly 291.26 Bayer greek χ Tau
 
 
WDS 04226+2538 STF 528 AB (Chi Tau) : NOTES
 
 
discov_num notes refcode
STF 528 chi Tau = 59 Tau
H 4 10. MEv2010
The secondary is SB2 (F8+G6), with period 17.6 days for Ba,Bb; RV
residuals indicate the presence of a more distant Bc companion. Based
on spectroscopic observations obtained at CfA 1988-2004, Torres (2006)
derived an orbit for Bab,Bc with period 9.447 +/- 0.017 yr. Mass for
the A component is determined to be 2.60 +/- 0.5 Msun. Inclination
angle for the Ba,Bb orbit is 53.5 +/- 0.5deg, yielding masses 1.19 and
1.02 Msun for Ba and Bb. Bc appears to be over-massive; based on
infrared excess this could be well explained as an equal-mass binary
composed of late-type stars of masses ~0.70 Msun (spectral type ~K4).
Total mass of B is 3.6 Msun. Torres estimates the Bab,Bc semi-major
axis at about 83.6 mas and the magnitude difference dV~3.3mag
(dK~1.5mag), making the pair potentially resolvable by speckle
interferometry. Trr2006b
 
 
REFERENCES
 
 
refcode metd author reference
MEv2010 - MacEvoy, B. ...................
MEv2010 private communication, 2010 (see http://www.handprint.com/ASTRO/index.html)
Trr2006b X - Torres, G. 2006AJ....131.1702T
Trr2006b +orb AJ 131, 1702, 2006
 
 
DISCOVERER
 
 
idgroup discov author
1 ITO Itoh, Y., Tamura, M., & Nakajima, T.
2 ITO Itoh, Y., Hayashi, M., Tamura, M., Tsuji, T., Oasa, Y., Fukagawa, M.,
2 ITO Hayashi, S.S., Naoi, T., Ishii, M., Mayama, S., Morino, J., Yamashita, T., et al.
3 ITO Itoh, Y., Tamura, M., Hayashi, M., Oasa, Y., Hayashi, S.S., Fukagawa, M.,
3 ITO Kudo, T., Mayama, S., Ishii, M., Pyo, T.-S., Yamashita, T., & Morino, J.
8 ITO Itoh, Y., Oasa, Y., Funayama, H., Hayashi, M., Fukagawa, M., Hashiguchi, T., &
8 ITO Currie, T.
9 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
04226+2538 STF 528 AB 2012 78 24 20.4 5.37 8.54 B9Vnn F8V N D 042234.94+253745.5
04226+2538 STF 528 AB 2016 79 25 19.4 5.37 8.54 B9Vnn+F8V N 042234.94+253745.5

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

 
 
WDS 04226+2538 STF 528 AB (Chi Tau) : VISUAL OBSERVATIONS REPORTS
 
 
No records found.


 
 
WDS 04226+2538 STF 528 AB (Chi Tau) : MEASURES
 
 
No records found.

 
 
WDS 04226+2538 (Chi Tau) : VIRTUAL EYEPIECE
 
 

04226+2538 STF 528A mag 5.37 Sp B9Vnn 04226+2538 ITO 23B sep 19.5 P.A. 24.10 mag 6.94 Sp F8V 04226+2538 ITO 23C sep 12.9 P.A. 353.30 mag 12.54 04226+2538 ITO 23D sep 10.3 P.A. 4.40 mag 13.29 04226+2538 ITO 23E sep 16.7 P.A. 354.90 mag 14.96 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 04226+2538 (Chi Tau) : ALADIN DSS IMAGE @ 04h 22m 34.94s +25° 37' 45.5"
 
 
 
 
WDS 04226+2538 STF 528 AB (Chi Tau) : NEIGHBORHOODS
 
 
FoV:
Limit:
Primaries only

04226+2538 STF 528AB distance=0' 04226+2538 ITO 23BC distance=1' 04226+2538 ITO 23BD distance=1' 04226+2538 ITO 23BE distance=1' 04220+2538 DAM 761 distance=9' 04219+2538 LDS1165 distance=10' 04236+2543 LDS5550 distance=14' 04236+2520 LDS1167 distance=22' 04233+2516 POU 444 distance=25' 04246+2556 LDS5552 distance=32' 04252+2545 TOK 247 distance=36' 04236+2503 MTZ 2 distance=38' 04243+2506 POU 447 distance=39' 04257+2545 LDS5557 distance=43' 04247+2610 KSA 17 distance=44' 04237+2456 ITO 25 distance=44' 04237+2450 POU 445 distance=51' 04202+2457 POU 439 distance=53' 04253+2618 COR 2Ba,Bb distance=55' 04253+2618 COR 2Aa,Ab distance=55' 04253+2618 WHT 1AB distance=55' 04271+2542 THB 1 distance=61' 04181+2538 LDS1163AB distance=62' 04222+2641 LDS5547 distance=63' 04269+2607 LEI 2AB distance=66' 04269+2607 CHN 2AB,C distance=66' 04269+2607 HAT 5AB,D distance=66' 04269+2607 SMN 10Ca,Cb distance=66' 04271+2606 KSA 19AB distance=68' 04271+2606 LOO 5AC distance=68' 04278+2525 OCC9090 distance=72' 04248+2643 KOH 10Ba,Bb distance=72' 04248+2643 KOH 10Aa,Ab distance=73' 04248+2643 KOH 10Aa,Ba distance=73' 04248+2643 KU 84AC distance=73' 04206+2429 COU 704AB distance=73' 04206+2429 POU 442AC distance=73' 04174+2559 LDS5533 distance=74' 04181+2621 TDS2814 distance=75' 04223+2655 KSA 16 distance=78' 04170+2557 LDS1160 distance=79' 04245+2424 POU 449 distance=80' 04192+2433 POU 435 distance=80' 04220+2658 SMN 9AB distance=81' 04220+2658 KSA 15AC distance=81' 04269+2444 REP 114Aa,Ab distance=81' 04269+2444 DCH 51AB distance=81' 04240+2418 BAG 13Ba,Bb distance=82' 04240+2418 STF 534BC distance=82' 04240+2418 STF 534AB distance=82' 04201+2652 LDS5539 distance=83' 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 04226+2538 STF 528 AB 25 19.4
Show 04226+2538 ITO 23 BC 245 11.6 1
Show 04226+2538 ITO 23 BD 227 11.0 1
Show 04226+2538 ITO 23 BE 264 10.6 1
Show 04220+2538 DAM 761 277 20.6 9
Show 04219+2538 LDS1165 292 34.3 10
Show 04236+2543 LDS5550 64 8.6 14
Show 04236+2520 LDS1167 197 3.0 22
Show 04233+2516 POU 444 344 15.6 25
Show 04246+2556 LDS5552 265 170.5 32
Show 04252+2545 TOK 247 271 43.0 36
Show 04236+2503 MTZ 2 123 5.7 38
Show 04243+2506 POU 447 151 11.4 39
Show 04257+2545 LDS5557 269 163.1 43
Show 04247+2610 KSA 17 338 27.8 44
Show 04237+2456 ITO 25 245 2.5 44
Show 04237+2450 POU 445 226 4.4 51
Show 04202+2457 POU 439 17 17.3 53
Show 04253+2618 COR 2 Ba,Bb 158 0.1 55
Show 04253+2618 COR 2 Aa,Ab 75 0.2 55
Show 04253+2618 WHT 1 AB 234 3.4 55
Show 04271+2542 THB 1 183 0.1 61
Show 04181+2538 LDS1163 AB 337 9.3 62
Show 04222+2641 LDS5547 134 59.5 63
Show 04269+2607 LEI 2 AB 274 0.7 66
Show 04269+2607 CHN 2 AB,C 105 12.1 66
Show 04269+2607 HAT 5 AB,D 117 57.4 66
Show 04269+2607 SMN 10 Ca,Cb 294 0.6 66
Show 04271+2606 KSA 19 AB 235 16.1 68
Show 04271+2606 LOO 5 AC 211 53.9 68
Show 04278+2525 OCC9090 -1 0.0 72
Show 04248+2643 KOH 10 Ba,Bb 135 0.2 72
Show 04248+2643 KOH 10 Aa,Ab 320 0.5 73
Show 04248+2643 KOH 10 Aa,Ba 158 7.9 73
Show 04248+2643 KU 84 AC 296 13.2 73
Show 04206+2429 COU 704 AB 83 1.9 73
Show 04206+2429 POU 442 AC 278 8.2 73
Show 04174+2559 LDS5533 89 157.0 74
Show 04181+2621 TDS2814 13 1.9 75
Show 04223+2655 KSA 16 152 23.1 78
Show 04170+2557 LDS1160 163 4.0 79
Show 04245+2424 POU 449 285 6.0 80
Show 04192+2433 POU 435 223 16.7 80
Show 04220+2658 SMN 9 AB 110 0.3 81
Show 04220+2658 KSA 15 AC 277 19.8 81
Show 04269+2444 REP 114 Aa,Ab 283 0.3 81
Show 04269+2444 DCH 51 AB 320 22.1 81
Show 04240+2418 BAG 13 Ba,Bb 110 0.0 82
Show 04240+2418 STF 534 BC 338 110.7 82
Show 04240+2418 STF 534 AB 291 29.1 82
Show 04201+2652 LDS5539 112 113.7 83

 
 
WDS 04226+2538 : COMPONENTS
 
 
  A B C D
B pa=24.1°
sep=19.51"
 
C pa=353.3°
sep=12.88"
pa=242.1°
sep=10.72"
 
D pa=4.4°
sep=10.31"
pa=223.7°
sep=10.40"
pa=137.7°
sep=3.39"
 
E pa=354.9°
sep=16.69"
pa=262.9°
sep=9.53"
pa=0.3°
sep=3.84"
pa=340.4°
sep=6.73"
 
 
04226+2538 A
 
 
Name Chi Tau Coord arcsec 2000 042234.94+253745.5 Mag 5.37 Spectral class B9Vnn (blue-white)
PmRA 20.00 PmDE -17.0 SAO 76573 HIP 20430
Tycho2 1820-01416-1 HD 27638 HR 1369 GC 5292
BD BD+25 707 Bayer Chi Tauri Bayer name Chi Flamsteed 59 Tauri
Flamsteed name 59 Tau
Tycho2
Tycho2 1820-01416-1 Pflag RAmdeg 65.64559588 DEmdeg 25.62931476
PmRA 19.6 PmDE -17.3 E RAmdeg 4 E DEmdeg 4
E pmRA 0.8 E pmDE 0.8 EpRAm 1991.30 EpDEm 1991.06
Num 23 Q RAmdeg 0.8 Q DEmdeg 0.8 Q pmRA 0.6
Q pmDE 0.6 BTmag 5.339 E BTmag 0.014 VTmag 5.372
E VTmag 0.009 Prox 194 TYC T HIP 20430
CCDM RAdeg 65.64554639 DEdeg 25.62935556 EpRA 1990 1.77
EpDE 1990 1.50 E RAdeg 3.5 E DEdeg 3.9 Posflg
Corr -0.1
SAO
SAO 76573 DelFlag RA1950 PmRA1950 0.0013
DE1950 PmDE1950 -0.021 Vmag 5.4 SpType B9
Double code Source 70 CatNum 5292 DM BD+25 707
DMcomp BDsup HD 27638 M HD 0
GC 5292 RA1950rad 1.13243353 DE1950rad 0.44528618 PmRA2000 0.0012
PmDE2000 -0.023
Hipparcos
Catalog H HIP 20430 Proxy RAhms 04 22 34.93
DEdms +25 37 45.7 Vmag 5.38 VarFlag 1 R Vmag H
RAdeg 65.6455 DEdeg 25.6294 AstroRef Plx 12.19
CCDM 04226+2538 N CCDM I Nsys 1 Ncomp 1
MultFlag Source Qual S M HIP
Theta Rho HD 27638 BD BD+25 707
CD CP Dm number +25 707 VIred -0.02
SpType B9V R SpType Coord arcsec 2000 042234.93+253745.7
Hipparcos 2
HIP 20430 Sn 5 So 0 Nc 1
RArad 1.1457308677 DErad 0.4473166785 Plx 11.2 PmRA 19.42
PmDE -17.16 E RArad 0.24 E DErad 0.15 E Plx 0.27
E pmRA 0.28 E pmDE 0.19 Hpmag 5.3693 E Hpmag 0.0023
SHp 0.013 VA 2 BV -0.041 E BV 0.008
VI -0.02
CCDM
Ccdm 04226+2538 RComp Comp A Note1
Note2 Discov num DRAs -1.04 DDEs -14.1
R dRAs 10 Year Theta Rho
Obs 2 Vmag 5.5 Sp B9 PmNote *
PmRA 29 PmDE -11 Dm number +25 707 Cat1 BD
Name2 +25 420 Cat2 AGK2/3 HD 27638 M HD
ADS BDS A 3161 M ADS BDS N IDS IDS 04165N2524A
HIC 20430
 
 
04226+2538 B
 
 
Coord arcsec 2000 042235.53+253803.3 Coord calc 042235.53+253803.3 Mag 6.94 Spectral class F8V (yellow-white)
PmRA 32.00 PmDE 3.0 Calc delta mag 1.57
CCDM
Ccdm 04226+2538 RComp Comp B Note1
Note2 Discov num STF 528 DRAs -0.45 DDEs 3.5
R dRAs 91 Year 1830 Theta 024 Rho 19.4
Obs 20 Vmag 7.6 Sp PmNote *
PmRA 29 PmDE -11 Dm number Cat1
Name2 +25 421 Cat2 AGK2/3 HD M HD
ADS BDS A 3161 M ADS BDS N IDS IDS 04165N2524B
HIC
 
 
04226+2538 C
 
 
Coord arcsec 2000 042234.83+253758.3 Mag 12.54 Calc delta mag 7.17 Calc coord yes
 
 
04226+2538 D
 
 
Coord arcsec 2000 042235.00+253755.8 Mag 13.29 Calc delta mag 7.92 Calc coord yes
 
 
04226+2538 E
 
 
Coord arcsec 2000 042234.83+253802.1 Mag 14.96 Calc delta mag 9.59 Calc coord yes