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Table 1

Log of observations.

Date rha Δa PAb αc UT Filter
2010 (AU) (AU) (deg) (deg)
October 27 1.0588 0.1281 272.4 56.6 00:12–00:25 Sloan-Gunn R
″ ″ ″ 00:25–00:31 Sloan-Gunn I
″ ″ ″ 00:34–00:38 Sloan-Gunn G
″ ″ ″ 00:45–00:57 Bessel U
″ ″ ″ 01:05–01:13 NH2
0.1282 ″ ″ 01:39–01:42 RC
″ ″ ″ 01:44–01:49 BC
0.1283 ″ ″ 01:53–02:13 C2
″ 272.5 ″ 02:34–02:55 CN
″ 272.6 ″ 03:08–03:13 C2
0.1284 ″ ″ 03:16–03:27 BC
″ ″ ″ 03:33–03:35 RC
0.1285 272.7 56.7 04:49 V400 (spectrum)
0.1286 ″ ″ 06:15–06:30 CN
October 29 1.0587 0.1333 275.8 57.5 01:11–01:43 CN
0.1334 275.9 ″ 02:30–02:38 C3
″ ″ ″ 02:43–02:51 C2
″ 276.0 ″ 02:55–03:10 C3
0.1335 ″ ″ 03:19–03:34 BC
″ ″ ″ 03:42–03:35 RC
0.1336 ″ ″ 04:01 V400 (spectrum)
0.1337 276.1 ″ 04:56–05:35 CN
0.1338 ″ ″ 05:45–05:57 BC

Notes. 

(a)

The heliocentric and geocentric distance of the component during the observations, respectively;

(b)

the position angle of the extended Sun-target radius vector as seen in the observer’s plane-of-sky, measured counter clockwise (east) from reference frame, North Celestial Pole;

(c)

the phase angle Sun-comet-observer.

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