Pluto Occultation of P131.1

Ron Stone has provided new astrometric measurements of this star from observations at the FASTT at the U.S. Naval Observatory. Here is a new occultation prediction based on this new position compared to the original position. CCD magnitudes listed are approximately equivalent to R magnitudes.

 

Star	RA (J2000)	Dec (J2000)
P131.1	16 58 49.439	-12 51 31.83

	P131.1 Current Prediction (as of 2002 05 17 11:03 AM EDT)
Date and Time (y m d h:s)	2002 08 21 06:57
Minimum Separation (arcsec)	0.05
Right Ascension (J2000) (h m s)	16 58 49.439
Declination (J2000) (d m s)	-12 51 31.83
Position Angle (deg)	298
Shadow Velocity (km s-1)	6.6
Star Magnitude	15.7 (V)
Solar Angle (deg)	107
East Longitude (deg)	-179
Distance (AU)	30.24
Prediction Version	p131.1-2.0

Prediction Notes

• The separation between the center line and each of the limb lines is an estimated Pluto atmospheric half-light radius. (1160 km after correction for refraction by Pluto's atmosphere.)
• The ephemeris used in this prediction is that generated for Pluto with JPL's Horizon's Ephemeris service (corrected for Light Travel time). A 0.04 arcsec correction (south and west in RA and Dec) is applied to account for estimated systematic errors between the ephemeris and observations.

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Last updated by Michael Person (mjperson@mit.edu) 2002 06 05 11:07 AM EDT

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