Coord 2000 | 17157-0949 | Discov num | TOK 53 | Comp | Ba,Bb | Coord arcsec 2000 | 17 15 41.08 -09 48 31.9 | ||||
Date first | 2009 | Date last | 2021 | Obs | 21 | ||||||
Pa first | 131 | Pa last | 278.5 | P.A. Now (θ) | 209.1° | ||||||
Sep first | 0.0 | Sep last | 0.03 | Sep. Now (ρ) | 0.038" | ||||||
Mag pri | 10.40 | Mag sec | 10.60 | delta mag (ΔM) | 0.2 | Spectral class | F9IV (yellow-white) | ||||
Pri motion ra | -012 | Sec motion ra | |||||||||
Pri motion dec | -021 | Sec motion dec | |||||||||
Notes | N O (See Notes, Orbital solution) |
Show | name | SAO | coord | wds_name | last | obs | pa | sep | mag1 | mag2 | d_mag | orb | current |
Show | HD 156034 | 141578 | 17 15 41 -09 48 32 | A 2592 AB | 2021 | 88 | 70 | 0.2 | 7.15 | 9.69 | 2.54 | Y | |
Show | 17 15 41 -09 48 32 | TOK 53 Ba,Bb | 2021 | 21 | 279 | 0.0 | 10.40 | 10.60 | 0.20 | Y | <=== |
Constellation | Ophiuchus | HIP | 84430 | Tycho2 | 5649-00907-1 | Gaia DR2 | 4143293519539985536 | ||||
HD | 156034 | ADS | 10423 | BD | BD-09 4525 | Distance | 204.08 | ||||
Distance ly | 665.71 |
Period (P) | 5.257y | ± 0.052 | Periastron (T) | 2011.08y | ± 0.59 | Semi-major axis (a) | 0.033a | ± 0.008 |
Eccentricity (e) | 0.46 | ± 0.11 | Inclination (i) | 138.6° | ± 24.9 | Longitude of periastron (ω) | 69° | ± 22.5 |
Node (Ω) | 52.3° | ± 11.7 | Notes | n | Reference | Tok2021b | ||
Equinox | Last observation | Grade | 3 | (1=Definitive, 9=Indet.) |
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Note: Theta is PA, Rho is Sep. For yearly orbits, data refer to Jan 1st. |
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Measures: green=micrometric, blue=interferometric, purple=photographic |
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discov_num | notes | refcode |
A 2592 | AB: Malkov et al. (2012) derive dynamical, photometric, and | |
spectroscopic masses 20.39 +/- 12.95, 4.49, 1.13 Msun, respectively. | Mlk2012 | |
AB + TOK 53Ba,Bb: This is the triple system HIP 84430. We computed | ||
the first orbit of the secondary subsystem Ba,Bb which was discovered | ||
at SOAR in 2009 and has just completed one full revolution since. Its | ||
separation is always close to the diffraction limit. Adopting a mass | ||
sum of 2.6 Msun for Ba,Bb, the resulting dynamical parallax is | ||
7.6+/-1.5mas, while the HIP2 parallax is 4.9+/-0.9mas. The latest | ||
orbit of the outer pair A 2592 AB published in Tokovinin et al. (2014) | [Tok2014 | |
does not account for the fact that the speckle measurements at SOAR | ||
refer to A,Ba and not to AB. Here we give a more accurate solution | ||
that uses the positions of AB computed from the measures of A,Ba under | ||
the assumption that Ba and Bb have equal masses. After this correction | ||
and orbit adjustment, the weighted residuals are 4.3mas in separation | ||
and 1.3deg in angle. Interestingly, there were a considerable number | ||
of speckle-interferometry measures of this pair obtained in the 1980's | ||
and 1990's at 4-m telescopes, but none of them recognized the | ||
subsystem Ba,Bb, despite its small dm. | ||
Ignoring the multiplicity, the spectroscopic survey of Guillout et al. | ||
(2009 A&A 504, 829) determined a moderate axial rotation V sin i = | ||
10.8km/s and detected the lithium line of 52.8mA equivalent width | ||
which, together with the X-ray detection by ROSAT (RasTyc 1715-0948), | ||
normally indicates youth. These authors do not mention this star in | ||
particular, but discuss a group of active lithium-rich giants in their | ||
sample, to which this system apparently belongs. Even with the larger | ||
dynamical parallax (instead of the HIP2 parallax), all three resolved | ||
components of HIP 84430 are located above the main sequence in the | ||
color-magnitude diagram. This multiple system is peculiar and merits | ||
further study. | Tok2015c |
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 | ||
Tok2015c | orb+j | Tokovinin, A., Mason, B.D., Hartkopf, W.I., Mendez, R.A., & Horch, E.P. | 2015AJ....150...50T |
Tok2015c | +St | AJ 150, 50, 2015 (some measures corrected in Tok2017b) | 2017AJ....154..110T |
Tok2021b | orb | Tokovinin, A. | 2021AJ....161..144T |
Tok2021b | AJ 161, 144, 2021 |
idgroup | discov | author |
1 | A | Aitken, R.G. |
coord_2000 | discov_num | comp | epoch | obs | pa | sep | mag_pri | mag_sec | spectr | notes | coord_arcsec_2000 |
17157-0949 | TOK 53 | Ba,Bb | 2009 | 2 | 141 | 0.0 | 10.40 | 10.60 | N | 171541.08-094831.9 | |
17157-0949 | TOK 53 | Ba,Bb | 2012 | 3 | 216 | 0.0 | 10.40 | 10.60 | N | 171541.08-094831.9 | |
17157-0949 | TOK 53 | Ba,Bb | 2013 | 6 | 175 | 0.0 | 10.40 | 10.60 | F9IV | N | 171541.08-094831.9 |
17157-0949 | TOK 53 | Ba,Bb | 2014 | 8 | 147 | 0.0 | 10.40 | 10.60 | F9IV | NO | 171541.08-094831.9 |
17157-0949 | TOK 53 | Ba,Bb | 2017 | 9 | 229 | 0.0 | 10.40 | 10.60 | F9IV | NO | 171541.08-094831.9 |
17157-0949 | TOK 53 | Ba,Bb | 2018 | 14 | 173 | 0.0 | 10.40 | 10.60 | F9IV | NO | 171541.08-094831.9 |
17157-0949 | TOK 53 | Ba,Bb | 2019 | 17 | 152 | 0.0 | 10.40 | 10.60 | F9IV | NO | 171541.08-094831.9 |
17157-0949 | TOK 53 | Ba,Bb | 2020 | 18 | 0 | 0.0 | 10.40 | 10.60 | F9IV | NO | 171541.08-094831.9 |
17157-0949 | TOK 53 | Ba,Bb | 2021 | 21 | 279 | 0.0 | 10.40 | 10.60 | F9IV | NO | 171541.08-094831.9 |
Click on the map to see the double of your interest. Pass over with the mouse cursor to display the catalog designation. |
Click on the map to see the double of your interest. Pass over with the mouse cursor to display the catalog designation. |
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A | B | |
B | pa=0.0° sep=0.00" | |
Bb | pa=278.6° sep=0.03" | pa=278.6° sep=0.03" |
Name | HD 156034 | Coord arcsec 2000 | 171541.08-094831.9 | Mag | 7.15 | Spectral class | F7V (yellow-white) | ||||
PmRA | 12.00 | PmDE | -21.0 | SAO | 141578 | HIP | 84430 | ||||
Tycho2 | 5649-00907-1 | HD | 156034 | GC | 23293 | BD | BD-09 4525 |
Tycho2 | 5649-00907-1 | Pflag | RAmdeg | 258.92117665 | DEmdeg | -9.80886095 | |||||
PmRA | 12.1 | PmDE | -21.2 | E RAmdeg | 5 | E DEmdeg | 5 | ||||
E pmRA | 0.8 | E pmDE | 0.9 | EpRAm | 1990.98 | EpDEm | 1990.84 | ||||
Num | 17 | Q RAmdeg | 1.0 | Q DEmdeg | 1.2 | Q pmRA | 1.1 | ||||
Q pmDE | 1.1 | BTmag | 7.999 | E BTmag | 0.017 | VTmag | 7.071 | ||||
E VTmag | 0.011 | Prox | 999 | TYC | T | HIP | 84430 | ||||
CCDM | AB | RAdeg | 258.92114861 | DEdeg | -9.80881056 | EpRA 1990 | 1.71 | ||||
EpDE 1990 | 1.46 | E RAdeg | 4.9 | E DEdeg | 5.4 | Posflg | P | ||||
Corr | 0.1 |
SAO | 141578 | DelFlag | RA1950 | PmRA1950 | 0.0008 | ||||||
DE1950 | PmDE1950 | -0.019 | Vmag | 7.1 | SpType | F5 | |||||
Double code | Source | 70 | CatNum | 23293 | DM | BD-09 4525 | |||||
DMcomp | BDsup | HD | 156034 | M HD | 0 | ||||||
GC | 23293 | RA1950rad | 4.50702034 | DE1950rad | -0.17022927 | PmRA2000 | 0.001 | ||||
PmDE2000 | -0.016 |
Catalog | H | HIP | 84430 | Proxy | H | RAhms | 17 15 41.08 | ||||
DEdms | -09 48 31.6 | Vmag | 6.93 | VarFlag | R Vmag | H | |||||
RAdeg | 258.921 | DEdeg | -9.80877 | AstroRef | A | Plx | 5.71 | ||||
CCDM | 17157-0949 | N CCDM | I | Nsys | 1 | Ncomp | 2 | ||||
MultFlag | C | Source | Qual | A | M HIP | AB | |||||
Theta | 211 | Rho | 0.336 | HD | 156034 | BD | BD-09 4525 | ||||
CD | CP | Dm number | -09 4525 | VIred | 0.85 | ||||||
SpType | F5 | R SpType | Coord arcsec 2000 | 171541.08-094831.6 |
HIP | 84430 | Sn | 15 | So | 3 | Nc | 2 | ||||
RArad | 4.519026841 | DErad | -0.1711952926 | Plx | 4.9 | PmRA | 3.9 | ||||
PmDE | -15.15 | E RArad | 0.85 | E DErad | 0.55 | E Plx | 0.94 | ||||
E pmRA | 1.11 | E pmDE | 0.7 | Hpmag | 7.0828 | E Hpmag | 0.0012 | ||||
SHp | 0.008 | VA | 0 | BV | 0.796 | E BV | 0.01 | ||||
VI | 0.83 |
Ccdm | 17157-0949 | RComp | Comp | A | Note1 | ||||||
Note2 | Discov num | DRAs | -0.92 | DDEs | 28.1 | ||||||
R dRAs | 10 | Year | Theta | Rho | |||||||
Obs | 2 | Vmag | 7.6 | Sp | F5 | PmNote | * | ||||
PmRA | 8 | PmDE | -21 | Dm number | -09 4525 | Cat1 | BD | ||||
Name2 | 141578 | Cat2 | SAO | HD | 156034 | M HD | |||||
ADS BDS | A10423 | M ADS BDS | N IDS | IDS | 17102S0942A | ||||||
HIC | 84430 |
Coord arcsec 2000 | 171541.08-094831.9 | Coord calc | 171541.09-094831.8 | Mag | 10.4 | Mag composta | 9.69 | ||||
Spectral class | F9IV (yellow-white) | PmRA | -12.00 | PmDE | -21.0 | Calc delta mag | 3.25 |
Coord arcsec 2000 | 171541.08-094831.9 | Mag | 10.6 | Calc delta mag | 3.45 | Calc coord | yes |