Basic data (System:1035)
C1900.0 | : | 18110-3408
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C2000.0 | : | 181736245-34062613
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Comp. | : | A
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Magn. | : | 6.01(V) ; 6.97(V)
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Spect. | : | B5V ; A2V
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Identifiers:
CD -34 12673 | CPD -34 7719 | GAIADR2 4044610255085884800 | GAIADR3 4044610255085884800
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GCVS RS Sgr | HD 167647 | HIP 89637
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Orbit
Element | | Value | Std. dev.
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Period (d.) | : | 2.4157 |
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Primary minimum (xJD-2,400,000.0) | : | 45509.6553 |
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Reference T0/epoch | : | JD
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Eccentricity | : | 0.04 |
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omega primary (deg.) | : | 187.9 |
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K1 (km/s) | : | 83.8 |
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K2 (km/s) | : | 250. |
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V0 (km/s) | : | +10.1 |
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sigma residuals primary | : |
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sigma residuals secondary | : |
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#RV primary | : |
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#RV secondary | : |
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Grade | : | 3.0
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Contributor | : | DAO
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Status | : | PUB
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Bibcode | : | 1986PASP...98.1342F
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Derived quantities (on the fly, from the above quantities) |
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a1sini (km) | : | 2.78146e+06 | 0
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a2sini (km) | : | 8.29792e+06 | 0
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m1sin**3 i (sol.mass) | : | 6.98192 | 0
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m2sin**3 i (sol.mass) | : | 2.34034 | 0
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Note
The new elements supersede the work of A. Colacevich (Oss. e Mem. Arcetri, 59,
33, 1940) and J. Sahade (Astrophys. J., 109, 116, 1949). The spectral type of
the secondary is inferred from the few lines that can be recognized in the
combined spectrum. The value of K2 is approximate and depends on measures of
the K line alone. The epoch appears to be the time of minimum velocity of the
hotter star. The small eccentricity is probably not real, since even the helium
lines used for measurement may be affected by gas-stream effects. Variable
emission has been detected at H-alpha. The best discussion of the light-curve
still seems to be that by R.L. Baglow (Mon. Not. Roy. Astron. Soc., 108, 343,
1948) of R.O. Redman's (ibid., 105, 212, 1945) photographic observations.
Baglow found an orbital inclination of about 82 deg and a fractional luminosity
for the larger star of 0.86. He did not regard these results as well
determined. Spectroscopic results have improved to the point where the system
should be observed photometrically with modern equipment and the results
submitted to full analysis. The period may be variable. Three companions are
listed in I.D.S., the closest is 9.7m at 38.9".
Plot
Encapsulated PostScript file
T. Merle