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| Spg. | Time interval | No. of | Telescope/ | Source |
| No. | (HJD-2400000) | RVs | Instrument | |
| 1 | 10 982.4-16 189.3 | 46 | Potsdam 0.80-m refractor | Hartmann (1904) |
| 2 | 14 997.5-15 045.4 | 11 | Meudon 0.62-m refractor | Deslandres (1900a,1904) |
| 3 | 15 245.0-15 281.0 | 3 | Lick Mills | Campbell & Moore (1928) |
| 4 | 18 297.7-19 479.6 | 36 | Allegheny 0.76-m refractor | Jordan (1916) |
| 5 | 19 474.6-20 236.6 | 74 | Ann Arbor 0.95-m prism spg. | Curtiss (1915) |
| 6 | 22 363.2-22 410.3 | 17 | Vienna 0.30-m coudé | Hnatek (1921) |
| 7 | 28 056.9-28 992.6 | 140 | Yerkes 1.02-m, Bruce prism spg. | Luyten et al. (1939) |
| 8 | 32 514.6-32 557.9 | 48 | McDonald 2.08-m reflector | Pismis et al. (1950) |
| 9 | 33 560.6-33 762.3 | 73 | Heidelberg 0.72-m, prism spg. | Miczaika (1952) |
| 10 | 40 216.6-40 655.2 | 49 | Kodaikanal 0.50-m Cassegrain reflector | Natarajan & Rajamohan (1971) |
| 11 | 43 753.5-48 546.9 | 60 | International Ultraviolet explorer SWP spectra | Harvin et al. (2002) |
| 12 | 44 654.9-44 950.2 | 23 | Kavalur 0.50-m Cassegrain reflector | Singh (1982) |
| 13 | 49 255.6-51 602.3 | 20 | Ondrejov 2.0-m, grating spg. | this paper: Reticon spectra |
| 14 | 49 613.0-49 617.9 | 6 | Kitt Peak 0.91-m coudé feed spg. | Harvin et al. (2002) |
| 15 | 50 150.9-50 537.9 | 14 | Mount Stromlo 1.88-m reflector | Harvin et al. (2002) |
| 16 | 52 957.5-55 293.3 | 204 | Ondrejov 2.0-m, grating spg. | this paper: CCD spectra |
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