Table 1: The basic parameters and observational data of sample stars.
No. Star V b-y m₁ c₁ $\pi$ (mas) $\sigma$ ( $\pi$ ) Obs. date S/N

1 HD 108177 9.66 0.331 0.060 0.285 10.95 1.29 2001/04/25 260

2 HD 149414 9.60 0.474 0.202 0.159 20.71 1.50 2001/04/17 218

3 BD +02 $^{\circ }$ 3375 9.94 0.352 0.047 0.258 8.35 1.64 2001/04/17 263

4 BD +20 $^{\circ }$ 3603 9.77 0.323 0.048 0.308 6.47 7.85 2001/04/16 218

5 BD +26 $^{\circ }$ 2606 9.73 0.332 0.052 0.289 10.28 1.42 2001/04/17 240

6 BD +28 $^{\circ }$ 2137 10.89 0.322 0.055 0.321 5.35 1.94 2001/04/23 240

7 BD +29 $^{\circ }$ 2091 10.26 0.382 0.059 0.157 10.55 1.75 2001/04/18 170

8 BD +34 $^{\circ }$ 2476 10.05 0.309 0.055 0.354 5.37 1.60 2001/04/17 260

9 BD +42 $^{\circ }$ 2667 9.86 0.342 0.067 0.277 8.05 1.12 2002/04/24 207

10 BD +51 $^{\circ }$ 1696 9.91 0.398 0.099 0.179 13.61 1.54 2001/04/21 170

**Table 1:** The basic parameters and observational data of sample stars.
No.	Star	V	b-y	m₁	c₁	$\pi$ (mas)	$\sigma$ ( $\pi$ )	Obs. date	S/N
1	HD 108177	9.66	0.331	0.060	0.285	10.95	1.29	2001/04/25	260
2	HD 149414	9.60	0.474	0.202	0.159	20.71	1.50	2001/04/17	218
3	BD +02 $^{\circ }$ 3375	9.94	0.352	0.047	0.258	8.35	1.64	2001/04/17	263
4	BD +20 $^{\circ }$ 3603	9.77	0.323	0.048	0.308	6.47	7.85	2001/04/16	218
5	BD +26 $^{\circ }$ 2606	9.73	0.332	0.052	0.289	10.28	1.42	2001/04/17	240
6	BD +28 $^{\circ }$ 2137	10.89	0.322	0.055	0.321	5.35	1.94	2001/04/23	240
7	BD +29 $^{\circ }$ 2091	10.26	0.382	0.059	0.157	10.55	1.75	2001/04/18	170
8	BD +34 $^{\circ }$ 2476	10.05	0.309	0.055	0.354	5.37	1.60	2001/04/17	260
9	BD +42 $^{\circ }$ 2667	9.86	0.342	0.067	0.277	8.05	1.12	2002/04/24	207
10	BD +51 $^{\circ }$ 1696	9.91	0.398	0.099	0.179	13.61	1.54	2001/04/21	170

Source LaTeX | All tables | In the text