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Table 5

Parameters of the Hipparcos astrometric observations.

Target HIP Sol. NOrbb σΛc NHipd
typea (mas)

HD 14651 11028 5 13.4 3.4 59
HD 16702 12685 5 15.0 5.3 140
HD 22781 17187 5 1.7 4.0 69
HD 30246 22203 5 0.8 3.5 56
HD 92320 52278 5 8.1 6.4 233
HD 137510 75535 5 1.4 1.9 101
HD 156279 84171 5 8.7 3.5 110
HD 167215 89270 7 1.8 5.3 144

Notes. 

(a)

“5”: standard five-parameter astrometric solution; “7”: solution including first derivatives of the proper motion.

(b)

Portion of the orbit covered by the Hipparcos measurements.

(c)

Median precision.

(b)

Number of observations.

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