Old 18-05-2011, 11:39 AM
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Location: Walcha , NSW
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Comet Obs 11th & 15th May 2011

Comet Observations 11th & 15th May 2011
C/2009 F4 McNaught
2011 May 14.74 UT; m1= 13.2; Dia= 0.8; DC= 2/3; 25cm L, f:5 (x83)
No tail, coma small, diffuse with an almost even brightness across coma, averted vision.
Comp Star= ASAS-3 133623-8300.9; Method= S; Cat= AU

C/2009 P1 Garradd
2011 May 10.76 UT; m1= 11.2; Dia= 2; DC= 6; 25cm L, f:5 (x39)
No tail, coma has diffuse edges with small stellar central condensation, elongated to South. Coma enhances slightly with Swan band filter.
Comp Star= ASAS-3 230200-0802.8; Method= M; Cat= AU

2011 May 14.77 UT; m1= 10.8; Dia= 4; DC= 6; 25cm L, f:5 (x39)
Coma has diffuse, evenly illuminated coma with small star-like central condensation, enhances well with Swan band filter, slight interference by zodiacal light, coma also appears elongated to the South.
Comp Star= TYC 5820-220-1; Method= M; Cat= TJ

C/2011 C1 McNaught
2011 May 10.77 UT; m1= 10.1; Dia= 2.8; DC= 4; 25cm L, f:5 (x39)
No tail, coma close to bright star, even brightness, diffuse with small noticeable smeared out central condensation.
Comp Star= TYC 1174-698-1; Method= M; Cat= TJ

2011 May 14.78 UT; m1= 10.2; Dia= 3.5; DC= 3; 25cm L, f:5 (x39)
No tail, coma is evenly illuminated with slightly brighter, broad central condensation.
Comp Star= TYC 598-81-1; Method= S; Cat= TJ
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