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(meteorobs) Orbital elements for Iras-Aracki-Alcock.
Subject: (meteorobs) Close comet encounters...
>
> I've been thinking about other close aproaches of comets in recent
> times. I know that Iras-Aracki-Alcock has made an aproximation of 4,5
> million km in 1983.
Does someone know how it was? Where can I get its
> orbital elements?
IRAS-Araki-Alcock (1983VII) mag 21.1
Period of orbit 1004.29 years (366816.1 days)
Perihelion distance 0.9913412 AU
Aphelion distance 199.58 AU
Orbital elements:
Semimajor axis 100.2843819 AU
Eccentricity 0.9901147
Inclination of orbit 73.2534000 degrees
Argument of perihelion 192.8493700 degrees
Long. ascending node 49.1022600 degrees
Date of perihelion JD 2445475.75287 (21 May 1983 6:04:07.9)
Right ascension: 03h03m13.363s
Declination: +12 57' 33.21"
Mean position at current epoch:
Right ascension: 03h03m19.765s
Declination: +12 58' 00.35"
Apparent position at current epoch:
Right ascension: 03h03m19.763s
Declination: +12 57' 59.52"
Dist from home planet: 36.02372262 AU (5,389,072,174 km)
Heliocentric position: lon 47.88294 lat -4.04519
Heliocentric radius 36.86013 AU
99.99% illuminated
Phase angle: 0.82 degrees
Elongation from Sun 147.73 degrees (evening sky)
Speed of apparent motion: 3.322"/hour at position angle 259.5
Larry Wood
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