Basic data (System:1058)
| C1900.0 | : | 18229+7241
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| C2000.0 | : | 182103383+72435824
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| Comp. | :
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| Magn. | : | 3.57(V)
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| Spect. | : | F7V
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Identifiers:
| Bayer $\chi$ Dra | BD +72 839 | Flamsteed 44 Dra | GAIADR2 2266693630693473024
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| GAIADR3 2266693630693473024 | GJ 713 | HD 170153 | HIP 89937
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| HR 6927
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Orbit
| Element | | Value | Std. dev.
|
|---|
| Period (d.) | : | 280.547 | 0.039
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| Periastron time (xJD-2,400,000.0) | : | 46848.5 | 1.4
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| Reference T0/epoch | : | JD
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| Eccentricity | : | 0.466 | 0.025
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| omega primary (deg.) | : | 120.4 | 3.4
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| K1 (km/s) | : | 18.22 | 0.66
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| K2 (km/s) | : | 26.0 | 1.1
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| V0 (km/s) | : | 32.02 | 0.26
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| sigma residuals primary | : |
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| sigma residuals secondary | : |
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| #RV primary | : | 15
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| #RV secondary | : | 15
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| Grade | : |
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| Contributor | : | EVG
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| Status | : | PUB
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| Bibcode | : | 1991A&A...248..485D
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| Derived quantities (on the fly, from the above quantities) |
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| a1sini (km) | : | 6.21907e+07 | 2.4e+06
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| a2sini (km) | : | 8.87464e+07 | 4e+06
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| m1sin**3 i (sol.mass) | : | 1.02752 | 0.11
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| m2sin**3 i (sol.mass) | : | 0.720057 | 0.066
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Note
The radial velocities have been published in Paper I (Duquennoy A.,
Mayor M. and Halbwaschs J.-L., 1991, AApS 88, 281)
Radial velocities used in this orbit
| xJD | Rad.Vel. | O-C or error | Weight | Component | Offset | Comment
|
| -2,400,000.0 | (km/s) | (km/s) | | | (km/s) |
|
| 44374.617 | 19.0 | 0.4 | 1 | a | 0 |
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| 44374.617 | 46.6 | 1.2 | 1 | b | 0 |
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| 44404.497 | 27.0 | 0.4 | 1 | a | 0 |
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| 44404.497 | 40.7 | 1.3 | 1 | b | 0 |
|
| 44439.433 | 32.8 | 0.5 | 1 | a | 0 |
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| 44439.433 | 31.8 | 2.4 | 1 | b | 0 |
|
| 46710.403 | 37.8 | 0.5 | 1 | a | 0 |
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| 46710.403 | 27.6 | 0.9 | 1 | b | 0 |
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| 46767.227 | 44.7 | 0.5 | 1 | a | 0 |
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| 46767.227 | 16.0 | 0.7 | 1 | b | 0 |
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| 46843.736 | 21.9 | 0.4 | 1 | a | 0 |
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| 46843.736 | 38.0 | 1.0 | 1 | b | 0 |
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| 46849.695 | 17.4 | 0.5 | 1 | a | 0 |
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| 46849.695 | 54.7 | 1.2 | 1 | b | 0 |
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| 46884.542 | 14.5 | 0.5 | 1 | a | 0 |
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| 46884.542 | 59.4 | 1.3 | 1 | b | 0 |
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| 46937.592 | 28.2 | 0.5 | 1 | a | 0 |
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| 46937.592 | 37.3 | 0.8 | 1 | b | 0 |
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| 46985.525 | 36.8 | 0.5 | 1 | a | 0 |
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| 46985.525 | 27.0 | 1.2 | 1 | b | 0 |
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| 47004.442 | 39.0 | 0.6 | 1 | a | 0 |
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| 47004.442 | 19.7 | 2.1 | 1 | b | 0 |
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| 47027.486 | 42.4 | 0.5 | 1 | a | 0 |
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| 47027.486 | 14.7 | 1.8 | 1 | b | 0 |
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| 47029.390 | 42.0 | 0.5 | 1 | a | 0 |
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| 47029.390 | 14.2 | 1.5 | 1 | b | 0 |
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| 47037.416 | 43.5 | 0.5 | 1 | a | 0 |
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| 47037.416 | 14.5 | 0.8 | 1 | b | 0 |
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| 47042.425 | 44.0 | 0.5 | 1 | a | 0 |
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| 47042.425 | 14.2 | 1.1 | 1 | b | 0 |
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Plot
Encapsulated PostScript file
T. Merle
