COBS News archive

New Comet: P/2013 A2 (SCOTTI)
January 11, 2013
Cbet nr. 3376, issued on 2013, January 08, announces the discovery of a new comet (discovery magnitude 19.5) by J. Scotti with the 691 Steward Observatory, Kitt Peak, on images obtained with the 0.9-m f/3 reflector + CCD on January 06.2. The new comet has been designated P/2013 A2 (SCOTTI).

New Comet: C/2012 Y3 (McNaught)
January 03, 2013
Cbet nr. 3367, issued on 2013, January 01, announces the discovery of a new comet (discovery magnitude 15.2) by the E12 Siding Spring Survey on images obtained with the 0.5-m Uppsala Schmidt + CCD on December 30.6. The new comet has been designated C/2012 Y3 (McNaught).

Recovery of comet 26P/Grigg–Skjellerup
January 02, 2013
MPEC 2012-Y30, issued 2012 December 26, reports our recovery of comet 26P/Grigg–Skjellerup. We found the comet on 2012 December 05.6 and December 14.5 at about magnitude 20. We imaged it remotely with the 2.0-m f/10 from the Siding Spring-Faulkes Telescope South.

New comet C/2012 X1 (LINEAR)
December 18, 2012
C/2012 X1 (LINEAR) was discovered by the LINEAR survey using a 1.0-m f/2.15 reflector from Socorro, NM, USA, on Dec. 08.38. Their automatic routines do not require human intervention, so it was reported as asteroidal and posted in the NEO Confirmation Pageunder the temporary designation CE63887.

New Comet: C/2012 V2 (LINEAR)
November 13, 2012
Cbet nr. 3290, issued on 2012, November 08, announces the discovery of a new comet (discovery magnitude 19.0) by the LINEAR survey on images obtained with the 1.0-m f/2.15 reflector + CCD on November 05.08. The new comet has been designated C/2012 V2 (LINEAR).

Splitting event in comet 168P/Hergenrother
October 29, 2012
Over the past few weeks, comet 168P/Hergenrother has been under intense scrutiny due to its strange behaviour, namely a 6 magnitude surge in its brightness in a matter of several nights. Simultaneously the central condensation became markedly brighter and sharper, whilst the coma was also seen to grow in size.

New Comet: C/2012 U1 (PANSTARRS)
October 25, 2012
Cbet nr. 3264, issued on 2012, October 22, announces the discovery of a new comet (discovery magnitude 21.0) by Pan-STARRS Survey on images obtained with the 1.8-m Pan-STARRS1 telescope at Haleakala on October 18.3. The new comet has been designated C/2012 U1 (PANSTARRS).

New Comet: P/2012 T7 (VOROBJOV)
October 25, 2012
Cbet nr. 3260, issued on 2012, October 18, announces the discovery of a new comet (discovery magnitude 20.1) by Tomas Vorobjov on three 120-s images that he took on October 15 remotely with Alexander Kostin (Houston, TX, U.S.A.) using a 0.81-m f/7 Ritchey-Chretien reflector located at the Mt. Lemmon SkyCenter via the Sierra Stars Observatory Network. The new comet has been designated P/2012 T7 (VOROBJOV).

Update on Comet 168P/Hergenrother
October 23, 2012
Our team performed follow-up observations of comet 168P/Hergenrother on 2012, Oct. 22.4, remotely through the 2m, f/10 Ritchey-Chretien + CCD of Faulkes Telescope North (Haleakala) under good seeing conditions, and a scale of 0.3arcsec/px. Comet 168P has recently undergone an outburst with its magnitude increasing from ~14-15 to magnituide ~9.5.

New Comet: P/2012 T1 (PANSTARRS)
October 18, 2012
Cbet nr. 3252, issued on 2012, October 11, announces the discovery of a new comet (discovery magnitude 20.7) by Pan-STARRS survey on CCD images obtained with the 1.8-m Ritchey-Chretien + CCD on October 06. Prediscovery Pan-STARRS observations from 2011 July 28 were identified by G. V. Williams. The new comet has been designated P/2012 T1 (PANSTARRS).

New Comet: C/2012 T6 (KOWALSKI)
October 18, 2012
Cbet nr. 3259, issued on 2012, October 18, announces the discovery of a new comet (discovery magnitude 17.6) by R. A. Kowalski on Catalina Sky Survey images obtained with the 0.68-m Schmidt telescope on October 15.4. The new comet has been designated C/2012 T6 (KOWALSKI).

New Comet: C/2012 T5 (BRESSI)
October 18, 2012
Cbet nr. 3258, issued on 2012, October 18, announces the discovery of a new comet (discovery magnitude 18.6) by T. H. Bressi on CCD mosaic images taken with the Spacewatch 0.9-m f/3 reflector at Kitt Peak on October 14.4. The new comet has been designated C/2012 T5 (BRESSI).

Updated data for comet C/2012 S1 (ISON)
October 02, 2012
Our team performed follow-up observations of comet C/2012 S1 (ISON) on 2012, Sept. 28.6, remotely through the 2m, f/10 Ritchey-Chretien + CCD of Faulkes Telescope North (Haleakala) under good seeing conditions, and a scale of 0.3 arcsec/px. After stacking 13 R-filtered exposures, 120-seconds each, comet ISON appears as a pale blob of light, slightly elongated toward the south-west (this is particularly obvious looking at the azimuthal median subtraction rendition).

New Comet: C/2012 S1 (ISON)
September 29, 2012
Cbet nr. 3238, issued on 2012, September 24, announces the discovery of a new comet (discovery magnitude 18.8) by Vitali Nevski (Vitebsk, Belarus) and Artyom Novichonok (Kondopoga, Russia) on CCD images obtained on Sept. 21.06 UT with a 0.4-m f/3 Santel reflector of the International Scientific Optical Network (ISON) near Kislovodsk, Russia. The new comet has been designated C/2012 S1 (ISON).

New update on comet C/2011 L4 (PANSTARRS)
September 13, 2012
Comet C/2011 L4 (PANSTARRS), discovered by Pan-STARRS 1 telescope on Haleakala, Maui, on the night of 2011, June 5-6, will reach perihelion in March 2013 when it will be located only 0.30 AU from the Sun and might become a bright naked eye object ( with a peak magnitude of anywhere from +1 to -1). At its brightest C/2011 L4 will appear only 15 degrees from the Sun.

New Comet: P/2012 O3 (McNAUGHT)
July 31, 2012
Cbet nr. 3193, issued on 2012, July 26, announces the discovery of a new comet (discovery magnitude 18.0) by R. H. McNaught on CCD images obtained with the 0.5-m Uppsala Schmidt telescope at Siding Spring on July 23.7. The new comet has been designated P/2012 O3 (McNAUGHT).

New Comet: P/2012 O2 (MCNAUGHT)
July 25, 2012
Cbet nr. 3189, issued on 2012, July 23, announces the discovery of a new comet (discovery magnitude 18.3) by R. H. McNaught on CCD images obtained with the 0.5-m Uppsala Schmidt telescope at Siding Spring on July 20.7. The new comet has been designated P/2012 O2 (MCNAUGHT).

Comet 96P/Machholz Visible in SOHO Images
July 14, 2012
Every ~5.3 years, comet 96P/Machholz makes a close and personal swing around the Sun. At a distance of 0.12 AU, comet Machholz comes within 11 million miles (18 million km). That is 8 times closer to the Sun than the Earth and even 2.5 times closer than the innermost planet Mercury.

Recovery of comet P/1994 X1
June 06, 2012
Cbet Circular No. 3132, issued on 2012, May 31, announces the recovery of comet P/1994 X1 = 2012 K7 (McNaught-Russell) by our team; this comet was discovered on 1994, December 12 with the UK Schmidt Telescope at Siding Spring observatory and it was last observed on 1995, April 17.

Discovery of cometary appearance of 2011 KP36
June 03, 2012
2011 KP36 was originally discovered as an asteroid by T. H. Bressi of Spacewatch survey on 2011, May 21. Its orbit was unusual (actually a=38.6 AU, e=0.87, i=19°), belonging to the outer Solar System. Its T3 parameter (respect to Jupiter) is 2.64, so it entered our T3 internal list of targets.