11319-3436 ZUC 1 Aa,Ab

 
 
11h 31m 55.26s -34° 36' 27.4" P.A. 18.00 sep 0.0 mag 8.46,8.39 Sp M2Ve
 
 
Coord 2000 11319-3436 Discov num ZUC   1 Comp Aa,Ab Coord arcsec 2000 11 31 55.26 -34 36 27.4
Date first 2000 Date last 2013 Obs 17
Pa first 26 Pa last 18.3 P.A. Now (θ) 33.8°
Sep first 0.1 Sep last 0.043 Sep. Now (ρ) 0.049"
Mag pri 8.46 Mag sec 8.39 delta mag (ΔM) 0.07 Spectral class M2Ve (red)
Pri motion ra -082 Sec motion ra
Pri motion dec -029 Sec motion dec
Notes N O K (See Notes, Orbital solution, K-band or other infrared magnitudes)
Visually invisible, K-band or other infrared star : Summary line gives K-band or other infrared (>1 micron) magnitudes
This double is physical.
 
 
11319-3436 SYSTEM COMPONENTS
 
 
Show name SAO coord wds_name last obs pa sep mag1 mag2 d_mag orb current
Show 11 31 55 -34 36 27 ZUC 1 Aa,Ab 2013 17 18 0.0 8.46 8.39 0.07 Y <===
Show 11 31 55 -34 36 27 LWR 2 AB 2018 20 352 1.8 7.70 12.60 4.90 Y
Triple system
2 estimated visually detectable stars in this system
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Constellation Hydra Gaia DR2 5398663566249861120
 
 
ORBITAL ELEMENTS
 
 
Period (P)6.0296y± 0.0388 Periastron (T)2004.4024y± 0.0802 Semi-major axis (a)0.07113a± 0.00821
Eccentricity (e)0.81079± 0.0491 Inclination (i)96.981°± 1.367 Longitude of periastron (ω)255.72°± 2.847
Node (Ω)37.887°± 1.022 Notesn ReferenceIzm2019
Equinox Last observation2013 Grade2(1=Definitive, 9=Indet.)
label theta rho
2000 26.3 0.057
2001 17.9 0.043
2002 355.7 0.022
2003 268.4 0.016
2004 226.7 0.030
2005 33.1 0.052
2006 26.5 0.057
2007 18.2 0.043
2008 356.9 0.023
2009 270.9 0.016
2010 227.4 0.030
2011 33.3 0.051
2012 26.7 0.058
2013 18.5 0.044
2014 358.1 0.024
2015 273.6 0.015
2016 228.1 0.030
2017 33.6 0.050
2018 26.9 0.058
2019 18.9 0.045
2020 359.2 0.024
2021 276.4 0.015
2022 228.8 0.030
2023 33.8 0.049
2024 27.1 0.058
2025 19.2 0.045
2026 0.2 0.025
2027 279.3 0.015
2028 229.5 0.030
2029 34.1 0.048
2030 27.3 0.058


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



 
 


wds11319-3436d.png orbit plot
Measures: green=micrometric, blue=interferometric, purple=photographic
 
 
 
WDS 11319-3436 ZUC 1 Aa,Ab : NOTES
 
 
discov_num notes refcode
ZUC 1 Aa,Ab: Magnitudes in J,H,K by Konacki et al. (2007) based on 2MASS Kon2007
combined magnitudes plus their flux ratios. They determine both
components have spectral type M1.5 +/- 0.5; log (Temp) for both is
3.56 +/- 0.01 K, intermediate between temperatures expected for dwarf
and giant stars, thus appropriate for PMS stars. Log (Luminosity) for
Aa and Ab are -0.80 +/- 0.08 and -0.84 +/- 0.08 Lsun, respectively.
Aa,Ab: Schmidt et al. (2008) analyzed all available astrometry and Sdt2008c
concluded TWA 5 exhibited orbital motion, refuting conjecture that
companion was a background object.
LWR 2 This system has been identified as a member of the TW Hya association
(Kastner et al. 1997 Science 277, 67) and is known as TWA 5. It
contains a previously known brown dwarf TWA 5B, first suggested by
Lowrance et al. (1999) and later confirmed by e.g. Brandeker et al. Lwr1999
(2003). The latter also reported the presence of a close companion Bnk2003
TWA 5Ab at 54 mas from the primary, independently detected by
Macintosh et al. (2001). We detect TWA 5B in our AstraLux data, but MBA2001
not TWA 5Ab, which implies that the projected separation was probably
smaller in 2010 than it was in 2000. The orbit of TWA 5Aa/Ab has been
analyzed in detail by Konopacky et al. (2007). Using the orbital Kon2007
parameters that they determine, we deduce that at epoch 2010.11, the
projected separation should be only about 18 mas, which is well
consistent with our non-detection of TWA 5Ab. We use the best-fit
total mass of 0.71Msun for TWA 5Aa/Ab from Konopacky et al. Jnn2012
Kohler et al. (2013) derive new orbits and masses for the young triple
system TWA 5. System mass for the close pair ZUC 1Aa,Ab is 0.90 +/-
0.1 Msun; system mass for the AB pair is 1.1 +/- 0.1 Msun. Koh2013
 
 
REFERENCES
 
 
refcode metd author reference
Bnk2003 A j Brandeker, A., Jayawardhana, R., & Najita, J. 2003AJ....126.2009B
Bnk2003 AJ 126, 2009, 2003
Bnk2003 (slight correction to 2001.145 theta and its error given by Neuhauser et al. 2010) 2010A&A...516A.112N
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.)
Jnn2012 Cl j Janson, M., Hormuth, F., Bergfors, C., Brandner, W., Hippler, S., Daemgen, S., 2012ApJ...754...44J
Jnn2012 +E2 Kudryavtseva, N., Schmalzl, E., Schnupp, C., & Henning, T.
Jnn2012 ApJ 754, 44, 2012 (some recalibrated measures published in Jnn2014b) 2014ApJS..214...17J
Koh2013 A j Koehler, R., Ratzka, T., Petr-Gotzens, M.G., & Correia, S. 2013A&A...558A..80K
Koh2013 +orb A&A 558, A80, 2013
Kon2007 Si j Konopacky, Q.M., Ghez, A.M., Duchene, G., McCabe, C., & Macintosh, B.A. 2007AJ....133.2008K
Kon2007 +A AJ 133, 2008, 2007
Kon2007 +orb
Lwr1999 Hn j Lowrance, P.J., McCarthy, C., Becklin, E.E., Zuckerman, B., Schneider, G., 1999ApJ...512L..69L
Lwr1999 +Ci Webb, R.A., Hines, D.C., Kirkpatrick, J.D., et al.
Lwr1999 +C ApJ 512, L69, 1999
MBA2001 A j Macintosh, B.A., Max, C., Zuckerman, B., Becklin, E.E., Kaisler, D., Lowrance, P., 2001ASPC..244..309M
MBA2001 +Si Weinberger, A., Christou, J., Schneider, G., & Acton, S.
MBA2001 "Young Stars Near Earth: Progress and Prospects", ASP Conf. 244, 309, 2001
MBA2001 (slight correction to 2001.138 theta error given by Neuhauser et al. 2010) 2010A&A...516A.112N
Sdt2008c A - Schmidt, T.O.B., Neuhauser, R., & Mugrauer, M. 2008IAUS..248..126S
Sdt2008c +orb IAU Symp 248, 126, 2008
 
 
DISCOVERER
 
 
idgroup discov author
1 ZUC Zuckerman, B. & Becklin, E.E.
 
 
WDS HISTORIC DATA
 
 
coord_2000 discov_num comp epoch obs pa sep mag_pri mag_sec spectr notes coord_arcsec_2000
11319-3436 ZUC 1 Aa,Ab 2005 10 30 0.1 8.46 8.39 NK 113155.26-343627.4
11319-3436 ZUC 1 Aa,Ab 2013 17 18 0.0 8.46 8.39 M2Ve NO K 113155.26-343627.4

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WDS 11319-3436 ZUC 1 Aa,Ab : VISUAL OBSERVATIONS REPORTS
 
 
No records found.


 
 
WDS 11319-3436 ZUC 1 Aa,Ab : MEASURES
 
 
No records found.

 
 
WDS 11319-3436 : VIRTUAL EYEPIECE
 
 

11319-3436 LWR   2A mag 7.7 Sp M1.5 11319-3436 ZUC   1Ab mag 8.39 11319-3436 LWR   2B sep 1.8 P.A. 353.70 mag 12.6 Sp M8.5 virtual eyepiece
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Radius:
Components only
 
 
WDS 11319-3436 : ALADIN DSS IMAGE @ 11h 31m 55.26s -34° 36' 27.4"
 
 
 
 
WDS 11319-3436 ZUC 1 Aa,Ab : NEIGHBORHOODS
 
 
FoV:
Limit:
Primaries only


11319-3436  ZUC   1Aa,Ab distance=0' 11319-3427  UC 2161 distance=10' 11303-3430  VSP  30Aa,Ab distance=21' 11345-3510  HJ 4454 distance=47' 11316-3338  I  1543AB distance=59' 11316-3338  I  1543AC distance=59' 11277-3514  KPP3846 distance=65' 11267-3429  NSN 294 distance=65' 11373-3504  RST2756 distance=72' 11350-3329  LDS5734 distance=77' 11366-3334  HJ 4455AB distance=86' 11366-3334  HJ 4455AC distance=86' 11274-3328  UC 2141 distance=89' 11261-3338  TVB 238 distance=93' 11329-3613  I  1544 distance=97' 11278-3604  UC 2143 distance=102' 11363-3605  SWR 113 distance=104' 11359-3259  LDS4121 distance=109' 11231-3431  RST2744 distance=110' 11229-3440  B  1188 distance=112' 11345-3250  LDS6245 distance=112' 11250-3555  SKF1217 distance=117' 11400-3327  I   232 distance=122' 11414-3514  JSP 497 distance=123' 11219-3416  VOU  25 distance=126' 11273-3242  RST2750 distance=129' 11393-3304  LDS4127 distance=130' 11213-3447  SWR 110 distance=132' 11426-3454  TSN  57 distance=133' 11348-3227  I  1213 distance=135' 11344-3225  KPP 876 distance=136' 11335-3221  LDS5732 distance=136' 11402-3610  B  2281 distance=138' 11379-3634  I   509 distance=138' 11241-3255  BRT1669 distance=142' 11232-3610  SEE 131 distance=142' 11211-3531  I  1539 distance=144' 11219-3318  HDS1617 distance=148' 11264-3223  RST2748 distance=151' 11428-3549  TOK 846 distance=152' 11350-3705  UC 2169 distance=154' 11442-3406  UC 2200 distance=156' 11220-3615  I  1540 distance=156' 11229-3247  JSP 484AB distance=158' 11447-3423  TDS8013 distance=159' 11249-3225  TDS7846 distance=159' 11431-3601  I  1546 distance=161' 11318-3718  LDS4111 distance=163' 11330-3151  HJ 4449AB distance=166' 11330-3151  WSI 102Aa,Ab distance=166' 11339-3150  LDS5733AB distance=167' grafico limitrofi
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Pass over with the mouse cursor to display the catalog designation.

Show name coord_2000 discov# comp pa sep dist(')
Show 11319-3436 ZUC 1 Aa,Ab 18 0.0
Show 11319-3436 LWR 2 AB 352 1.8
Show 11319-3427 UC 2161 291 75.8 10
Show 11303-3430 VSP 30 Aa,Ab 30 0.2 21
Show 11345-3510 HJ 4454 33 18.9 47
Show 11316-3338 I 1543 AB 340 2.5 59
Show 11316-3338 I 1543 AC 160 26.8 59
Show 11277-3514 KPP3846 40 1.4 65
Show 11267-3429 NSN 294 110 7.1 65
Show 11373-3504 RST2756 76 2.9 72
Show 11350-3329 LDS5734 257 275.9 77
Show 11366-3334 HJ 4455 AB 240 3.4 86
Show 11366-3334 HJ 4455 AC 81 44.0 86
Show 11274-3328 UC 2141 173 64.0 89
Show 11261-3338 TVB 238 232 11.4 93
Show 11329-3613 I 1544 60 1.2 97
Show 11278-3604 UC 2143 66 39.2 102
Show 11363-3605 SWR 113 264 30.7 104
Show 11359-3259 LDS4121 220 3.0 109
Show 11231-3431 RST2744 92 2.6 110
Show 11229-3440 B 1188 102 0.4 112
Show 11345-3250 LDS6245 129 15.1 112
Show 11250-3555 SKF1217 346 50.9 117
Show 11400-3327 I 232 162 2.1 122
Show 11414-3514 JSP 497 81 3.4 123
Show 11219-3416 VOU 25 238 0.4 126
Show 11273-3242 RST2750 97 1.5 129
Show 11393-3304 LDS4127 132 8.0 130
Show 11213-3447 SWR 110 147 5.1 132
Show 11426-3454 TSN 57 296 34.0 133
Show 11348-3227 I 1213 153 1.6 135
Show 11344-3225 KPP 876 156 7.4 136
Show 11335-3221 LDS5732 22 277.0 136
Show 11402-3610 B 2281 137 0.6 138
Show 11379-3634 I 509 9 0.5 138
Show 11241-3255 BRT1669 143 3.8 142
Show 11232-3610 SEE 131 124 32.6 142
Show 11211-3531 I 1539 141 0.2 144
Show 11219-3318 HDS1617 103 0.4 148
Show 11264-3223 RST2748 21 1.4 151
Show 11428-3549 TOK 846 212 1.3 152
Show 11350-3705 UC 2169 233 10.2 154
Show 11442-3406 UC 2200 149 18.7 156
Show 11220-3615 I 1540 303 1.1 156
Show 11229-3247 JSP 484 AB 143 2.7 158
Show 11447-3423 TDS8013 270 1.0 159
Show 11249-3225 TDS7846 188 1.4 159
Show 11431-3601 I 1546 283 0.2 161
Show 11318-3718 LDS4111 84 6.6 163
Show 11330-3151 HJ 4449 AB 134 74.6 166
Show 11330-3151 WSI 102 Aa,Ab 14 0.1 166

 
 
WDS 11319-3436 : COMPONENTS
 
 
  A Ab
Ab pa=15.2°
sep=0.04"
 
B pa=353.7°
sep=1.84"
pa=353.2°
sep=1.80"
 
 
11319-3436 A
 
 
Coord arcsec 2000 113155.26-343627.4 Mag 7.7 Spectral class M1.5 (red) PmRA -82.00
PmDE -29.0
 
 
11319-3436 Ab
 
 
Coord arcsec 2000 113155.26-343627.4 Mag 8.39 Calc delta mag 0.07 Calc coord yes
 
 
11319-3436 B
 
 
Coord arcsec 2000 113155.24-343625.6 Mag 12.6 Spectral class M8.5 (red) Tycho2 7223-00275-1
Calc delta mag 4.14 Calc coord yes
Tycho2
Tycho2 7223-00275-1 Pflag RAmdeg 172.98028642 DEmdeg -34.60762503
PmRA -81.6 PmDE -29.4 E RAmdeg 55 E DEmdeg 67
E pmRA 2.5 E pmDE 2.4 EpRAm 1985.03 EpDEm 1980.81
Num 5 Q RAmdeg 1.3 Q DEmdeg 1.7 Q pmRA 1.3
Q pmDE 1.7 BTmag 13.414 E BTmag 0.382 VTmag 11.723
E VTmag 0.152 Prox 999 TYC HIP
CCDM RAdeg 172.98051083 DEdeg -34.60753111 EpRA 1990 1.69
EpDE 1990 1.61 E RAdeg 94.4 E DEdeg 106.5 Posflg
Corr 0.1