C/2012 F6 Lemmon observation Dec 12 UT
- Hello all,
I made my first visual observation this morning of comet C/2012 F6 Lemmon using Tycho T2 photometry as comparison.
2012 Dec 12.69 UT: m1=9.8, Dia.=6', DC=4...20cm L 57x...Michael Mattiazzo (Castlemaine, Victoria)
2012 Dec 12.69, 9.8, 6' (M. Mattiazzo, Castlemaine, Victoria, Australia, 20-cm reflector);
Comet Lemmon is surprisingly bright and over 4 magnitudes brighter than the ephemeris.
This observation would indicate an absolute magnitude of 5.5. (if n=4 assumed)
The coma is large, at least 6', and strongly enhanced through a swan band comet filter.
If this comet is gassy in nature, as its visual appearance suggests, we may expect a faster rate of brightening (n=6) than usual,
which could put its peak brightness at magnitude 3 next March, as suggested by Seiichi Yosida at
or more conservatively, magnitude 5.
Continued observations are encouraged.
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