|2013 March -
|2013 June -
Projected light curve [click on the image for the latest version, 2013
November 28]. Note:
a) The error bars remain the same. The perihelion brightness could be around the brightness of Venus, though a brighter magnitude is within the range of the error bars. It does not remain this bright for very long.
b) The aperture corrected light curve is currently m = 7.3±0.1 + 5 log d + 6.2±0.3 log r
c) The fitted curve generally appears above the observed points as it has been corrected for aperture in order to predict the naked eye brightness.
d) The comet's future brightness may deviate from the fitted curve.
e) The comet is still brightening and the rate of brightening has increased. The overall curve suggests that the comet is now brightening faster than a reflective body. The log r parameter has increased with the addition of this week's data.
f) John Bortle suggests that a comet has to be brighter than H10 = 7.0 + 6q = 7.1 to survive perihelion. For 2012 S1, H10 is 7.5±0.1, and the absolute magnitude is 7.3±0.1 so it appears to be beyond this limit.
There was a joint Asteroids and Remote Planets Section and Comet Section meeting on 2012 October 6. This was held in Milton Keynes and included discussion of Rosetta. For the meeting notes see The Comet's Tale for 2012
There was a Comet Section meeting on 2013 May 18 to discuss observing techniques. The video of the meeting is on the BAA web and a full write up will appear in "The Comet's Tale".
We hope to obtain EU funding to support a pro-am European meeting prior to the Rosetta encounter.