Coord 2000 | 17572+2400 | Discov num | MCA 50 | Comp | Coord arcsec 2000 | 17 57 14.34 +23 59 44.6 | |||||
Date first | 1976 | Date last | 2012 | Obs | 29 | ||||||
Pa first | 160 | Pa last | 162.6 | P.A. Now (θ) | 162.6° | ||||||
Sep first | 0.1 | Sep last | 0.088 | Sep. Now (ρ) | 0.088" | ||||||
Mag pri | 6.30 | Mag sec | 7.90 | delta mag (ΔM) | 1.6 | Spectral class | G2V+K2V (yellow/yellow-orange) | ||||
Pri motion ra | -013 | Sec motion ra | |||||||||
Pri motion dec | +071 | Sec motion dec | |||||||||
Notes | N O (See Notes, Orbital solution) |
Name | HD 163840 | Constellation | Hercules | SAO | 85575 | HIP | 87895 | ||||
Tycho2 | 2090-04674-1 | Gaia DR2 | 4580864547137360512 | HD | 163840 | HR | 6697 | ||||
GC | 24423 | GL | NN 4039A | BD | BD+24 3283 | Distance | 28.25 | ||||
Distance ly | 92.15 |
Period (P) | 881.628d (2.41y) | ± 0.064 | Periastron (T) | 55650.39d (2011.241y) | ± 0.38 | Semi-major axis (a) | 80.64m | |
Eccentricity (e) | 0.4165 | ± 0.001 | Inclination (i) | 72.83° | ± 0.47 | Longitude of periastron (ω) | 135.46° | ± 0.16 |
Node (Ω) | 175.32° | ± 0.44 | Notes | n | Reference | Kie2016 | ||
Equinox | 2000 | Last observation | 2015 | Grade | 2 | (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 |
MCA 50 | A close pair of solar-type stars, astrometric binary | |
Balega et al. (1984) derive probable period of 940 days | Bag1984a | |
Culver et al. (1980 BAAS 12, 250) report this to be a spectroscopic | ||
binary with a period of 2.6 years. | Bla1987 | |
Determination of these two old measures resulted from new reduction | ||
techniques developed over the past year; these data were reanalysed | ||
for a joint spectroscopic/speckle analysis of this system. | Hrt1992b | |
All our CCD speckle data for this close system have been reprocessed | ||
and examined. In addition, we have listed 7 negative measures dating | ||
from observations made at the KPNO 2.1-m in the 1970's. | ||
Hartkopf et al. (1994) derive a combined spectroscopic/interferometric | Hrt1994 | |
solution. | ||
Hipparcos astrometric solution adopted some elements from the orbit of | HIP1997d | |
McAlister et al. (1995). | McA1995 | |
Pourbaix gives combined solution for this resolved SB2, yielding | Pbx2000b | |
orbital parallaxes and component masses. | ||
Orbit determined by fitting revised Hipparcos intermediate astrometric | ||
data. Derived component masses 1.12 +/- 0.17 and 0.72 +/- 0.11 Msun. | Ren2010 | |
Malkov et al. (2012) derive dynamical, photometric, and spectroscopic | ||
masses of 2.29 +/- 0.27, 2.15, and 1.79 Msun, respectively. | Mlk2012 | |
Kiefer et al. (2016) generates a combined spectroscopic/astrometric | ||
orbit, yielding masses 1.132 +/- 0.014 and 0.7421 +/- 0.0073 Msun, and | ||
a parallax 36.35 +/- 0.20 mas. | Kie2016 |
refcode | metd | author | reference |
Bag1984a | S j | Balega, Y.Y. & Ryadchenko, V.P. | 1984SvAL...10...95B |
Bag1984a | SvAL 10, 95, 1984 | ||
Bla1987 | S j | Blazit, A. Bonneau, D., & Foy, R. | 1987A&AS...71...57B |
Bla1987 | A&AS 71, 57, 1987 | ||
HIP1997d | orb - | Hipparcos | 1997yCat.1239....0E |
HIP1997d | Hipparcos Catalog, ESA SP-1200, 1997 | ||
HIP1997d | (DMSA/O Orbital Solutions) | ||
Hrt1992b | Sc j | Hartkopf, W.I., McAlister, H.A., & Franz, O.G. | 1992AJ....104..810H |
Hrt1992b | AJ 104, 810, 1992 | ||
Hrt1994 | Sc j | Hartkopf, W.I., McAlister,H.A., Mason, B.D., Barry, D.J., Turner, N., & Fu, H.-H. | 1994AJ....108.2299H |
Hrt1994 | AJ 108, 2299, 1994 | ||
Kie2016 | orb - | Kiefer, F., Halbwachs, J.-L., Arenou, F., Pourbaix, D., Famaey, B., Guillout, P., | 2016MNRAS.458.3272K |
Kie2016 | Lebreton, Y., Nebot Gomez-Moran, A., Mazeh, T., Salomon, J.-B., Soubiran, C., & | ||
Kie2016 | Tal-Or, L. | ||
Kie2016 | MNRAS 458, 3272, 2016 | ||
McA1995 | orb - | McAlister, H.A., Hartkopf, W.I., & Mason, B.D. | 1995AJ....110..366M |
McA1995 | AJ 110, 366, 1995 | ||
Mlk2012 | not - | Malkov, O.Yu., Tamazian, V.S., Docobo, J.A., & Chulkov, D.A. | 2012A&A...546A..69M |
Mlk2012 | A&A 546, A69, 2012 | ||
Pbx2000b | orb - | Pourbaix, D. | 2000A&AS..145..215P |
Pbx2000b | A&AS 145, 215, 2000 | ||
Ren2010 | orb - | Ren, S. & Fu, Y. | 2010AJ....139.1975R |
Ren2010 | AJ 139, 1975, 2010 |
coord_2000 | discov_num | comp | epoch | obs | pa | sep | mag_pri | mag_sec | spectr | notes | coord_arcsec_2000 |
17572+2400 | MCA 50 | 2003 | 22 | 180 | 0.1 | 6.30 | 7.90 | G2V+K2V | NOD | 175714.34+235944.6 | |
17572+2400 | MCA 50 | 2007 | 23 | 157 | 0.1 | 6.30 | 7.90 | G2V+K2V | NOD | 175714.34+235944.6 | |
17572+2400 | MCA 50 | 2012 | 29 | 163 | 0.1 | 6.30 | 7.90 | G2V+K2V | NO | 175714.34+235944.6 |
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 | pa=164.0° sep=0.09" |
Componente originario normalizzato | AB | Name | HD 163840 | Coord arcsec 2000 | 175714.34+235944.6 | Mag | 6.3 | ||||
Spectral class | G2V (yellow) | PmRA | -13.00 | PmDE | 71.0 | SAO | 85575 | ||||
HIP | 87895 | Tycho2 | 2090-04674-1 | HD | 163840 | HR | 6697 | ||||
GC | 24423 | BD | BD+24 3283 |
Tycho2 | 2090-04674-1 | Pflag | RAmdeg | 269.30969463 | DEmdeg | 23.99588484 | |||||
PmRA | -16.9 | PmDE | 72.8 | E RAmdeg | 4 | E DEmdeg | 3 | ||||
E pmRA | 1.0 | E pmDE | 0.9 | EpRAm | 1991.15 | EpDEm | 1991.61 | ||||
Num | 16 | Q RAmdeg | 1.5 | Q DEmdeg | 1.3 | Q pmRA | 1.4 | ||||
Q pmDE | 1.3 | BTmag | 7.108 | E BTmag | 0.015 | VTmag | 6.396 | ||||
E VTmag | 0.009 | Prox | 999 | TYC | T | HIP | 87895 | ||||
CCDM | RAdeg | 269.30973889 | DEdeg | 23.99571861 | EpRA 1990 | 1.42 | |||||
EpDE 1990 | 1.78 | E RAdeg | 3.6 | E DEdeg | 3.3 | Posflg | |||||
Corr | -0.1 |
SAO | 85575 | DelFlag | RA1950 | PmRA1950 | -0.0018 | ||||||
DE1950 | PmDE1950 | 0.076 | Vmag | 6.4 | SpType | G0 | |||||
Double code | Source | 70 | CatNum | 24423 | DM | BD+24 3283 | |||||
DMcomp | BDsup | HD | 163840 | M HD | 0 | ||||||
GC | 24423 | RA1950rad | 4.69132131 | DE1950rad | 0.41887048 | PmRA2000 | -0.0017 | ||||
PmDE2000 | 0.076 |
Catalog | H | HIP | 87895 | Proxy | RAhms | 17 57 14.34 | |||||
DEdms | +23 59 44.6 | Vmag | 6.32 | VarFlag | R Vmag | H | |||||
RAdeg | 269.31 | DEdeg | 23.9957 | AstroRef | + | Plx | 35.02 | ||||
CCDM | N CCDM | Nsys | Ncomp | 1 | |||||||
MultFlag | O | Source | Qual | M HIP | |||||||
Theta | Rho | HD | 163840 | BD | BD+24 3283 | ||||||
CD | CP | Dm number | +24 3283 | VIred | 0.68 | ||||||
SpType | G2V | R SpType | Coord arcsec 2000 | 175714.34+235944.6 |
HIP | 87895 | Sn | 75 | So | 4 | Nc | 1 | ||||
RArad | 4.700341603 | DErad | 0.4188041467 | Plx | 35.4 | PmRA | -17.79 | ||||
PmDE | 73.56 | E RArad | 0.27 | E DErad | 0.44 | E Plx | 0.62 | ||||
E pmRA | 0.33 | E pmDE | 0.47 | Hpmag | 6.4543 | E Hpmag | 0.0005 | ||||
SHp | 0.008 | VA | 0 | BV | 0.642 | E BV | 0.006 | ||||
VI | 0.68 |
Ccdm | 17572+2400 | RComp | Comp | A | Note1 | ||||||
Note2 | Discov num | DRAs | 2.28 | DDEs | -15.5 | ||||||
R dRAs | 10 | Year | Theta | Rho | |||||||
Obs | 2 | Vmag | 6.3 | Sp | G2 | PmNote | * | ||||
PmRA | -17 | PmDE | 63 | Dm number | +24 3283 | Cat1 | BD | ||||
Name2 | +23 1686 | Cat2 | AGK2/3 | HD | 163840 | M HD | |||||
ADS BDS | M ADS BDS | N IDS | IDS | 17531N2401A | |||||||
HIC | 87895 |
Componente originario normalizzato | AB | Coord arcsec 2000 | 175714.34+235944.5 | Mag | 7.9 | Spectral class | K2V (yellow-orange) | ||||
Calc delta mag | 1.6 | Calc coord | yes |
Ccdm | 17572+2400 | RComp | Comp | B | Note1 | * | |||||
Note2 | Discov num | MAL 50 | DRAs | DDEs | |||||||
R dRAs | Year | 1976 | Theta | 160 | Rho | 0.1 | |||||
Obs | 3 | Vmag | Sp | PmNote | |||||||
PmRA | PmDE | Dm number | Cat1 | ||||||||
Name2 | Cat2 | HD | M HD | ||||||||
ADS BDS | M ADS BDS | N IDS | IDS | 17531N2401B | |||||||
HIC | 87895 |