From the NASA JPL database
45P Honda-Mrkos-Pajdusakova was discovered on Dec. 3, 1948 by Minoru Honda at Kurashiki, Japan. Its other two
co-discovers are Czech astromer Antonin Mrkos and Slovak astronomer Ludmila Pajdusakova.
45P is a Jupiter-family comet with a period of 5.25 years.
Most recently, the comet was recovered on June 05, 2011 from Catalina Station in Arizona.
The size of the nucleus is not well known and could be between 0.5-1.5 km in diameter. We do not know
its period of rotation. We tried to detect this comet at Goldstone in 1996 when it was
more distant than it will be this year, but we did not get echoes.
14 comets have been detected with radar so far, but only three have been observed at Goldstone.
(The most recent was 73P/Schwassmann-Wachmann 3 in 2006.)
45P Honda-Mrkos-Pajdusakova will approach Earth within 0.06 AU (~23 lunar distances) on Aug. 15, 2011,
when it will be too far south for Goldstone to track.
We will observe it on Aug. 19 and 20 when it will be between 34-38 LD from Earth.
We plan to obtain CW echo power spectra and perhaps coarse-resolution ranging.
45P Honda-Mrkos-Pajdusakova reaches the peak of its optical brightness (approximate apparent
visual total magnitude of ~6) at the end of September.
Orbital and Physical Characteristics
orbit type Jupiter family comet
semimajor axis 3.021 AU
inclination 4.3 deg
perihelion distance 0.530 AU
aphelion distance 5.512 AU
nuclear magnitude (M2) 18.0
diameter ~1.0 km
rotation period unknown
pole direction unknown
lightcurve amplitude unknown
optical albedo unknown
NASA JPL Link
edit on 27/7/2011 by daikaiju because: (no reason
edit on 27/7/2011 by daikaiju because: (no reason given)