Central Bureau for Astronomical Telegrams
IAUC 2248: 1970f; P/AREND-RIGAUX
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Read IAUC 2249
Circular No. 2248
Central Bureau for Astronomical Telegrams
INTERNATIONAL ASTRONOMICAL UNION
Postal Address: Central Bureau for Astronomical Telegrams
Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
Cable Address: SATELLITES, NEWYORK
Western Union: RAPID SATELLITE CAMBMASS
COMET WHITE-ORTIZ-BOLELLI (1970f)
The following positions have been reported:
1970 UT R. A. (1950) Decl. Mag. Observer
May 22.329 4 57 +14 5 Matchett
22.333 5 00 +13 4 McMillan
24.93652 5 17 06.48 +12 36 36.1 3 Pereyra
26.384 5 24.8 +12 02 5 S.A.O. Woomera
V. L. Matchett and S. C. McMillan (Brisbane). Observations very
approximate; altitude 3o, twilight. Comet centrally condensed.
Tail 10o in p.a. 105o (Matchett), 7o (McMillan).
Z. M. Pereyra (Cordoba Observatory for the CNEGH). Tail 12o.
Correction to telegraphed position.
S.A.O. Woomera. Tail 15o.
Many of the observations are inconsistent, but the comet
evidently belongs to the Kreutz sungrazing group. The elements below
are uncertain, q being assumed so that the direction of perihelion
(L = 282.0, B = +34.8) is the same as for the other members. The
comet will shortly reach its maximum elongation (22o) from the
sun.
T = 1970 May 14.5 ET Peri. = 62.3
Node = 337.6 1950.0
q = 0.0090 AU (assumed) Incl. = 139.8
1970 ET R. A. (1950) Decl. Delta r Mag.
May 28 5 32.55 +11 26.4
30 5 41.23 +10 46.4 1.510 0.676 6.2
June 1 5 49.06 +10 09.9
3 5 56.21 + 9 36.3 1.631 0.789 7.0
5 6 02.78 + 9 05.3
7 6 08.86 + 8 36.3 1.748 0.894 7.7
9 6 14.53 + 8 09.1
11 6 19.83 + 7 43.3 1.859 0.994 8.3
13 6 24.82 + 7 18.9
Mag. = 7.0 + 5 log Delta + 10 log r
PERIODIC COMET AREND-RIGAUX
The following predicted elements and ephemeris, by the
undersigned, are based on an orbit satisfying 65 observations made at
the 1951, 1958 and 1963 apparitions. Perturbations by Mercury to
Pluto have been taken into account.
T = 1971 Apr. 6.0213 ET Epoch = 1971 Mar. 30.0 ET
Peri. = 328.9367 e = 0.599095
Node = 121.5554 1950.0 a = 3.602782 AU
Incl. = 17.8336 n = 0.1441276
q = 1.444373 AU P = 6.838 years
1970/71 ET R. A. (1950) Decl. Delta r Mag.
July 13 0 17.70 -12 56.2 2.381 2.897 20.3
23 0 23.04 -13 51.1
Aug. 2 0 26.67 -15 06.0 2.034 2.768 19.8
12 0 28.25 -16 41.3
22 0 27.52 -17 35.3 1.749 2.637 19.2
Sept. 1 0 24.29 -20 43.4
11 0 18.60 -22 57.0 1.549 2.503 18.7
21 0 10.86 -25 04.5
Oct. 1 0 01.87 -25 52.8 1.449 2.368 18.5
11 23 52.82 -28 10.6
21 23 45.03 -28 51.2 1.441 2.233 18.6
31 23 39.62 -28 53.3
Nov. 10 23 37.35 -28 19.2 1.493 2.098 18.7
20 23 38.55 -27 13.7
30 23 43.18 -25 41.1 1.572 1.966 18.8
Dec. 10 23 51.05 -23 45.5
20 0 01.82 -21 30.0 1.652 1.840 18.9
30 0 15.18 -18 56.7
Jan. 9 0 30.85 -16 07.4 1.719 1.722 18.9
19 0 48.58 -13 03.9
29 1 08.20 - 9 47.5 1.771 1.618 18.8
Feb. 8 1 29.59 - 6 20.7
18 1 52.65 - 2 45.9 1.813 1.534 18.7
28 2 17.37 + 0 53.5
Mar. 10 2 43.70 + 4 33.3 1.856 1.475 18.7
20 3 11.61 + 8 08.6
30 3 41.07 +11 33.8 1.913 1.446 18.6
Apr. 9 4 11.96 +14 43.1
19 4 44.11 +17 30.9 1.994 1.452 18.7
29 5 17.2T +19 52.3
May 9 5 51.09 +21 43.7 2.105 1.489 18.8
19 6 25.12 +23 03.1
29 6 58.96 +23 50.3 2.245 1.557 18.9
June 8 7 32.15 +24 06.6
18 8 04.34 +23 55.1 2.411 1.647 19.1
Mag. = 15.5 + 5 log Delta + 5 log r + 0.03 (phase-angle)
1970 May 29 (2248) Brian G. Marsden
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