31P/Schwassmann-Wachmann (Record n° 2084)
Perihelion distance : 3.41 AU
Inclination to ecliptic : 5 °
Orbital period : 8.69 years
Eccentricity : 0.19
NASA/JPL elements
IAU/MPC elements
On 2011 Mar 03 22h42 UT by Jean-Francois Soulier
(Copyright Jean-Francois Soulier)Magnitude (MPC m2) 18.3 Magnitude standard deviation 0.3 Aperture radius for m2 8 " r (dist/Sun) 3.481 AU d (dist/Earth) 2.495 AU Right ascension 159.71025 ° Declination +13.30075 ° MPC report COD C10
CON JEAN-FRANCOIS SOULIER [jean-francois.soulier2@wanadoo.fr]
OBS JF. Soulier
MEA JF. Soulier
TEL 0.255-m f/3.6 Newtonian reflector + CCD
ACK MPCReport file updated 2011.03.03 and 04
AC2 jean-francois.soulier2@wanadoo.fr
NET USNO-B1.0
0031P C2011 03 03.94605 10 38 50.46 +13 18 02.7 18.1 N C10
0031P C2011 03 03.95507 10 38 50.09 +13 18 04.9 18.7 N C10
0031P C2011 03 03.96690 10 38 49.72 +13 18 07.8 18.0 N C10
Instrument type Newton Instrument aperture (0=naked eye) 254 mm Instrument focale length 900 mm Instrument focale/diameter 3.6 Camera ST7-XMEd Sensor CCD Sensor size 6.9 x 4.6 mm2 Sensor pixels number 765 x 510 Sensor temperature -25 °C Binning 1x1 Mount PERL-VIXEN Autoguide Yes Exposure total time 1440 s Picture exposure details 12X120s Seeing 4 Moon elongation 170 ° Air mass 1.25 Observatory MPC code C10 Location 77 Reference stars catalog (ast) USNO-B1.0
Used softwares ASTROMETRICA Resulting picture sampling (scale) 2.06 "/pix Image processing PRISMV7 APE DDP Observation submission date 2011 Mar 04 12h00m30s Observation modification date 2011 Mar 05 10h28m58s