Table A.1
Measurements of angular separation of components of the triple system 1 Del.
| Date | Angle | Separation | n | Magnitudes | Reference | ||||||
| [°] | [′′] | ||||||||||
|
|
|||||||||||
| AB | AC | AB | AC | A | B | A−B | C | A−C | |||
|
|
|||||||||||
| 4.10.1872 | 340 | 0.7 | 6 | 11 | B73 | ||||||
|
|
|||||||||||
| 1874.54 | 343 | 0.85 | B74D | ||||||||
| 360 | 15. | B74 | |||||||||
|
|
|||||||||||
| 1948.74 | 348.3 | 0.85 | 6.0 | 8.0 | P51 | ||||||
| 1948.76 | 351.9 | 0.75 | |||||||||
| 1948.77 | 349.9 | 0.83 | |||||||||
| 1948.76 | 350.0 | 0.81 | 3 | m | |||||||
|
|
|||||||||||
| 1957.475 | 345.9 | 0.97 | 6.0 | 8.0 | vdB58 | ||||||
| 1957.490 | 349.4 | 0.92 | 6.0 | 8.2 | |||||||
| 1957.498 | 345.7 | 0.86 | 6.0 | 8.2 | |||||||
| 1957.512 | 345.7 | 0.89 | 6.0 | 8.0 | |||||||
| 1957.496 | 346.7 | 0.91 | 4 | 6.0 | 8.1 | m | |||||
|
|
|||||||||||
| 1960.78 | 346.2 | 0.91 | 5 | H61 | |||||||
|
|
|||||||||||
| 0.9 | 1 | 1.98 | vH66 | ||||||||
|
|
|||||||||||
| 1991.25 | 349 | 0.929 ± 0.003 | 1.86 | E97 | |||||||
| 346 | 0.9 | 6.1 | 8.1 | DN00 | |||||||
| 349 | 16.8 | 6.1 | 14.1 | DN00 | |||||||
| 352.5 | 0.95 | 6.19H | 8.02H | FM00 | |||||||
|
|
|||||||||||
| 1996.7013 | 349.5 | 0.915 | 1 | H00 | |||||||
|
|
|||||||||||
| 1995.47 | 350.5 | 1. | 1 | 2.2 | A98 | ||||||
| 1996.74 | 352 | 0.96 | 3 | 2.1 | A98 | ||||||
|
|
|||||||||||
| 1998.789 | 349.0 | 0.90 | 6.0 | 7.9 | D00 | ||||||
|
|
|||||||||||
| 2000.44 | 340.1 | 17.16 | W06 | ||||||||
|
|
|||||||||||
| 2000.5000 | 349.7 | 0.907 | 1 | D04 | |||||||
| 2000.5002 | 349.8 | 0.911 | 1 | ||||||||
|
|
|||||||||||
| 2001.365 | 339.8 ± 0.1 | 16.572 ± 0.113 | 2 | 7.700 ± 0.340 | 13.950 ± 0.06 | H13 | |||||
|
|
|||||||||||
| 2003.788 | 348.9 | 0.89 | 6 | M04 | |||||||
|
|
|||||||||||
| 2004.878 | 349.4 ± 0.007 | 0.919 ± 0.007 | 1 | S06 | |||||||
Notes. n: number of measurements; ; Additional measurement of positions was reported for 2009 in the current version of the Washington Double Star Catalog, but no further details were found.
Reference. (B73) Burnham (1873a): micrometer, Chicago , 6-inch Alvan Clark telescope; (B74) Burnham (1874): micrometer, Washington, 26-inch telescope; (P51) Prêtre (1951): micrometer, Pic du Midi, 38-cm; (vdB58) van den Bos (1958): micrometer, Lick, 12-inch reflector; (H61) Heintz (1961): micrometer, München, 28.5cm refractor; (vH66) van Herk (1966): micrometer, Observatoire de Nice, 38-cm; (E97) ESA (1997): Hipparcos; (DN00) Dommanget & Nys (2000): Hipparcos; (FM00) Fabricius & Makarov (2000): Hipparcos; (H00) Hartkopf et al. (2000): speckle, Mount Wilson, 2.5-m telescope; (A98) Alzner (1998): micrometer, Hemhofen, 32.5-cm Cassegrain and 360-mm Zeiss-Newtonian; (D00) Douglass et al. (2000): micrometer, Washington, 66-cm refractor; (W06) Wycoff et al. (2006): from 2MASS observations using data mining; (D04) Docobo et al. (2004): speckle, Calar Alto, 1.52-m telescope; (H13) Hartkopf et al. (2013): 20-cm, UCAC Ru; (M04) Mason et al. (2004): speckle, USNO Naval, 26-inch refractor; (S06) Scardia et al. (2006): speckle, Brera, Merate, 1-m Zeiss telescope; m: mean values (in italics).
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