Basic data (System:981)
| C1900.0 | : | 17375+6848
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| C2000.0 | : | 173657092+68452869
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| Comp. | : | A
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| Magn. | : | 4.80(V)
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| Spect. | : | F5V
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Identifiers:
| Bayer $\omega$ Dra | BD +68 949 | GAIADR2 1637717179389828224 | GAIADR3 1637717179389828224
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| GJ 4017 | HD 160922 | HIP 86201 | HR 6596
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Orbit
| Element | | Value | Std. dev.
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| Period (d.) | : | 5.279799 | 0.000003
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| Periastron time (xJD-2,400,000.0) | : | 44698.273 | 0.005
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| Reference T0/epoch | : | JD
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| Eccentricity | : | 0 |
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| omega primary (deg.) | : | 0 |
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| K1 (km/s) | : | 35.8 | 0.3
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| K2 (km/s) | : | 45.2 | 0.3
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| V0 (km/s) | : | -14.1 | 0.2
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| sigma residuals primary | : |
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| sigma residuals secondary | : |
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| #RV primary | : | 14
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| #RV secondary | : | 13
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| Grade | : |
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| Contributor | : | EVG
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| Status | : | PUB
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| Bibcode | : | 1987A&A...171..157M
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| Derived quantities (on the fly, from the above quantities) |
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| a1sini (km) | : | 2.59917e+06 | 22000
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| a2sini (km) | : | 3.28163e+06 | 22000
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| m1sin**3 i (sol.mass) | : | 0.16285 | 0.0026
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| m2sin**3 i (sol.mass) | : | 0.128983 | 0.0022
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Note
The value of P was derived by combining the authors' elements
with T0 of Luyten (1936, ApJ 84, 85), based on Turner's (1907, Lick Obs.
Bull. 4, 163) observations.
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) |
|
| 44397.521 | 21.01 | 0.41 | 1 | a | |
|
| 44445.367 | 13.78 | 0.42 | 1 | a | |
|
| 44440.390 | 6.17 | 0.42 | 1 | a | |
|
| 45010.729 | 0.35 | 0.43 | 1 | a | |
|
| 44409.484 | -24.33 | 0.42 | 1 | a | |
|
| 44409.492 | -25.14 | 0.66 | 1 | a | |
|
| 44404.455 | -35.09 | 0.42 | 1 | a | |
|
| 44426.421 | -50.58 | 0.48 | 1 | a | |
|
| 44458.366 | -47.42 | 0.46 | 1 | a | |
|
| 45002.724 | -33.01 | 0.45 | 1 | a | |
|
| 44374.581 | -26.35 | 0.41 | 1 | a | |
|
| 44444.383 | 16.17 | 0.43 | 1 | a | |
|
| 44460.381 | 20.37 | 0.44 | 1 | a | |
|
| 45532.390 | 21.92 | 0.43 | 1 | a | |
|
| 44397.526 | -57.78 | 0.54 | 1 | b | |
|
| 44445.371 | -52.22 | 0.54 | 1 | b | |
|
| 44440.395 | -39.74 | 0.57 | 1 | b | |
|
| 45010.732 | -33.10 | 0.57 | 1 | b | |
|
| 44404.474 | 13.41 | 0.54 | 1 | b | |
|
| 45798.647 | 25.30 | 0.59 | 1 | b | |
|
| 44426.426 | 30.39 | 0.47 | 1 | b | |
|
| 44458.371 | 27.43 | 0.59 | 1 | b | |
|
| 45002.727 | 9.22 | 0.54 | 1 | b | |
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| 44374.586 | 0.53 | 0.48 | 1 | b | |
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| 44444.386 | -53.16 | 0.53 | 1 | b | |
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| 44460.387 | -56.85 | 0.51 | 1 | b | |
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| 45532.395 | -57.90 | 0.49 | 1 | b | |
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Plot
Encapsulated PostScript file
T. Merle
