P/2008 O2 (McNaught) and Main Belt Asteroid (410928) Maidbronn


Only through the collaboration between many observers of the world, the orbits of Minor Planets and Comets can be secured.
To be a small part of this global net work of astromomers and amateurs makes me very happy and proud.

Behind every discovery or recovery of an object in space is standing an exiting story.
But the most important part of these extraordinary stories is the collaboration in friendship with like-minded guys around the world.

When blinking a series of images I found two "new" objects on the side of the comet: MAID01 and MAID02           GIF Animation

MAID01 (K09SH2G) is a recovery:  2009 SG172 = 2003 UD373 = 2006 AE103. See: MPC 2009-T01 
MAID02 (K09SO2T) is a new object and my first discovery. MAID02
= 2006 BN60 = 2009 ST242 = (410928) Maidbronn.
 

P/2008 O2 (McNaught) © by Bernhard Haeusler, Germany

© 2009-09-28 by Bernhard Haeusler, Maidbronn, Germany                              frozen on comet,  stars and new objects

24 x 5 min. exposure, 2009-09-28 UT 01:52 to 03:46, 12" SCT  f-6.532 + CCD ST10XME
19.04 mag, coma: 12", tail: 46" in PA 239°

Antonio Garrigós Sánchez (B37) confirmed the asteroids at September, 30 2009. Thanks a lot for this fine work!
Also thanks to Josep M. Bosch (B74), the discoverer of the Apollo Asteroid and Near Earth Object (NEO) 2009 ST19
who helped to make the contact to Antonio.

Pre-discovery image of MAID02 at September, 26 2009           


 

The comet and the two asteroids in their orbital situation at September, 28 2009.
All objects almost in line.

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Astrometry of all moving objects on the image:

MPC observation: computed with Astrometrica

COD B82
OBS Bernhard Haeusler
TEL 0.30-m Schmidt-Cassegrain + CCD

NET CMC-14

MAID01 C2009 09 28.07653 00 56 00.90 +16 36 46.5 19.0 R B82
MAID01 C2009 09 28.09095 00 56 00.28 +16 36 42.1 19.4 R B82
MAID01 C2009 09 28.10523 00 55 59.67 +16 36 37.3 19.4 R B82
MAID01 C2009 09 28.11953 00 55 58.98 +16 36 32.6 19.9 R B82

MAID02 C2009 09 28.07653 00 56 10.80 +16 35 02.5 19.7 R B82
MAID02 C2009 09 28.09095 00 56 10.19 +16 35 02.5 20.1 R B82
MAID02 C2009 09 28.11953 00 56 08.60 +16 35 00.6 19.6 R B82

PK08O020 C2009 09 28.07653 00 55 41.79 +16 32 40.0 19.1 N B82
PK08O020 C2009 09 28.11953 00 55 40.19 +16 32 35.9 18.9 N B82
PK08O020 C2009 09 28.13382 00 55 39.54 +16 32 32.8 18.8 N B82

COD B37

OBS Antonio Garrigos Sanchez,Turruchel G.,Carlota G.
MEA Antonio Garrigos Sanchez
TEL 0.51-mf/4 Newtonian reflector + CCD
ACK MPCReport file updated 2009.09.30 03:21:04

NET CMC-14

 MAID01   C2009 09 29.97648 00 54 40.45 +16 27 08.6          19.0 R      B37
 MAID01   C2009 09 30.03759 00 54 37.74 +16 26 49.3          19.2 R      B37
 MAID01   C2009 09 30.08448 00 54 35.68 +16 26 34.9          18.6 R      B37

 MAID02   C2009 09 29.97648 00 54 34.16 +16 31 56.1          19.6 R      B37
 MAID02   C2009 09 30.03759 00 54 30.88 +16 31 49.6          19.6 R      B37
 MAID02   C2009 09 30.08448 00 54 28.53 +16 31 46.0          18.9 R      B37

 PK08O020  C2009 09 29.97648 00 54 30.80 +16 29 07.5          18.7 N      B37
 PK08O020  C2009 09 30.03759 00 54 28.46 +16 29 00.5          19.4 N      B37
 PK08O020  C2009 09 30.08448 00 54 26.72 +16 28 55.4          18.8 N      B37


Photometry of the comet:

Photometry computed with FOCAS II, using the Multibox method:

COD B82
OBS Bernhard Haeusler
CATALOG: USNO A2.0 / CMC-14 - BAND: R

                                                      10x10  20x20  30x30  40x40  50x50  60x60   SNR   SB  COD
OBJECT        DATE       TIME       +/-       +/-       +/-       +/-       +/-      +/-  N  FWHM  CAT
------------  ---------- --------  -----  -----  -----  -----  -----  -----  ----  ----  ---

P/2008 O2 28/09/2009 02:52:05 19.04 18.48 18.04 17.85 17.72 17.53 4.1 18.9 B82
P/2008 O2 28/09/2009 02:52:05* 0.27 0.45 0.40 0.46 0.65 0.73 7 4.2 CMC

FoCAs II - 07/01/2009-b

FOCAS II is a tool for photometry on the base of data coming from Astrometrica. Focas is basically using the .LOG file of Astrometrica.

Explanation of the FOCAS II table headings:

Object, date and time are self-explaining.
10x10, 20x20 ... 60x60 are the measured magnitudes according to the aperture sizes of photometry in arc sec (rectancle).
SNR is the  Signal-to-noise ratio for aperture photometry (calculator).
SB is the magnitude of the faintest star on the image matching with the used star catalogue. This is not the faintest star of the image!
COD is the MPC Code of the observatory.

second line:
+/- are the precisions of the measurements.
N is the number of the used images for the measurements.
FWHM is the Full-Width Half-Maximum of the total PSF: Measure of the seeing.
CAT is the used star catalog in Astrometrica.

Focas II is using the .log file of Astrometrica and is computing the photometry under different apertures (10x10 ... 60x60).
The graphs are showing the astrometric precision of the images.

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links:

http://astrosurf.com/cometas-obs/index_i.htm Visual and CCD Observations and images from the "Cometas Obs" mailing list, using the Focas II format

es.groups.yahoo.com/group/Cometas_Obs The Spanish comet observation group in Yahoo

 

Copyright: The author of NEO Planner and all sites of this web is Bernhard Haeusler, Dettelbach, Germany, all rights reserved