[BAA Comets] [comets-ml] 29P S-W1 Outburst : m2 = 14.5

[Kevin Hills]

Good evening Richard, Jean-François.  I managed to get more images tonight, again in a crowded star field so I am a little nervous about the measurements but as shown below it does seem that something is afoot...

COD D90
CON K. Hills, Cheshire, England
CATALOG: CMC-15
                                   10x10  20x20  30x30  40x40  50x50  60x60   SNR   SB   COD
OBJECT        DATE       TIME        +/-    +/-    +/-    +/-    +/-    +/-     N  FWHM  CAT
------------  ---------- --------  -----  -----  -----  -----  -----  -----  ----  ----  ---
29P           02/03/2014 18:32:00  16.49  15.84  15.45  15.16  14.89  14.64  21.6  19.8  D90
29P           02/03/2014 18:32:00*  0.03   0.04   0.05   0.07   0.08   0.09     9   3.1  CMC
29P           03/03/2014 18:03:57  14.03  13.91  13.84  13.78  13.71  13.66  97.0  19.7  D90
29P           03/03/2014 18:03:57*  0.02   0.03   0.03   0.03   0.03   0.03     5   3.0  CMC

With kind regards,
Kevin


On 3 Mar 2014, at 17:17, Richard Miles <rmiles.btee at btinternet.com> wrote:

> 
> Excellent result Jean-François,
>  
> Thank you.
>  
> This is the first recorded outburst in nearly 9 months and adds another valuable result to the database.
>  
> We also have Kevin Hills measurement:
> 0029P	C	2014	3	2.77222			16.5   	N  D90
>  
> So the outburst happened at 2014 March 02.98 +/-0.16 d, i.e. we have the time accurate to about +/-4 hours (st.dev.) which is very helpful.
>  
> That is a nice result and, if confirmed, comes 3.4 days after my prediction of an outburst from an active site on the nucleus which I call "Source B". So not bad after an interval of almost 9 months since the last event.
>  
> It is good to have this accurate time of outburst as it extends the length of the ephemeris to 11.6 years and now totals 36 outbursts. If I include this latest datapoint to make the ephemeris more accurate then the present outburst actually occurred 3.1 days late assuming a linear ephemeris (constant rotation rate of the nucleus). That is just within the previously observed range of times.
>  
> The next significant outburst may (or may not) happen on 2014 Mar 28.9 +/-3.5 d.
>  
> Clear skies,
> Richard Miles
> British Astronomical Association
>  
> ----- Original Message -----
> From: Soulier Jean-François
> To: comets-ml at yahoogroups.com
> Sent: Monday, March 03, 2014 9:06 AM
> Subject: [comets-ml] 29P S-W1 Outburst : m2 = 14.5
> 
> Good morning.
>  
> Comet comes to a surge of 2.7 (+/-0.2) magnitudes in a few tens of hours !
> We easily found in two stages this increase in magnitude.
>  
> 0029P C2014 02 24.35009 15 56 16.42 -29 58 47.1 18.0 N W96
>  
> 0029P C2014 02 27.39587 15 56 58.62 -30 05 03.0 16.8 N W96
>  
> 0029P C2014 02 28.32770 15 57 10.27 -30 06 54.8 16.9 N W96
>  
> 0029P C2014 03 01.23395 15 57 21.02 -30 08 42.4 16.2 N W96
>  
> 0029P C2014 03 02.28976 15 57 32.76 -30 10 45.4 17.2 N W96
>  
> 0029P C2014 03 03.20230 15 57 42.35 -30 12 29.9 14.5 N W96
> 0029P C2014 03 03.24106 15 57 42.73 -30 12 34.4 14.5 N W96
> 0029P C2014 03 03.26384 15 57 42.96 -30 12 37.3 14.5 N W96
> 0029P C2014 03 03.27993 15 57 43.10 -30 12 38.7 14.5 N W96
> 
> T400RC Remote, SpaceObs., A.Maury, Chile, of always opening radius : 5.52"
> Echant . : 0.69"/pix
> No stars in the field measurements.
> Coma : +/- 21".
>  
> Image comparison DDS and 29P :
> http://6888comete.free.fr/fr/image29PschwassmannwachmannChile.html
>  
> Other stations can they confirm ?
>  
> Sincerely.
> SOULIER Jean-François
> C10/France
> 
> 
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