Occultation of C313.2

The following prediction is the result obtained from the analysis of 244 strip scans obtained at the Lowell Observatory Astrograph by MIT observers, compared with an offset to the light-time corrected, geocentric JPL Horizon's ephemeris (PLU013, DE-0412, DE405) determined by comparing the Pluto system barycenter to the measured barycenter from the strips.

Reference star position: (UCAC2, in epoch of event)	RA (J2000)	Dec (J2000)	R Mag
C313.2	17 28 55.0174	-15 00 54.750	14.8
Offsets from Reference Position/Ephemeris
Body	RA (arcsec)	Dec (arcsec)
C313.2	0.0098 +/- 0.0028	0.0291 +/- 0.0037
Pluto System Barycenter	-0.0040 +/- 0.0066	0.0084 +/- 0.0064	(from PLU013)
Charon	0 +/-	0 +/-	(from PLU013)

	C313.2 UCAC2.0 Prediction (as of: 2005 6 27)
Geocentric Mid-time (yyyy mm dd hh:mm:ss)	2005 7 11 03:36:57 UT
Minimum Geocentric Separation (arcsec)	0.055 +/- 0.008
Position Angle (deg)	173.7
Geocentric Shadow Velocity (km s^-1)	20.93
Star Magnitude	14.8 R
Solar Angle (deg)	152
East Longitude (deg)	-79.0
Distance (AU)	30.06
Prediction Version	C313.2-U2.0-2.2

Prediction Notes

The separation between the center line and each of the limb lines is an estimated Charon radius of 590 km.
MIT Astrograph Observers: Elisabeth Adams, Tucker Jones, Kelly Kilts, Michael Person, Rosemary Pike, David Roe

Archive of all C313.2 occultation predictions based on alternate sources of data, including past predictions.

C313.2 Occultation Predictions for Individual Sites

Site	East Longitude	Latitude	Distance (km)	Immersion (UT)	Mid-time (UT)	Emersion (UT)	Duration (sec)
Bellatrix	-68 10 48	-22 57 09	266	3:35:34	3:35:38	3:36:23	49
Cerro Armazones	-70 11 47	-24 35 51	122	3:35:42	3:36:09	3:36:36	54
CTIO	-70 48 54	-30 09 54	461	3:36:00	3:36:17	3:36:34	34
Gemini South	-70 43 24	-30 13 42	470	3:36:00	3:36:17	3:36:34	33
Geocentric	-----------	------------	1317	---------	3:36:54	--------	----
Las Campanas	-70 42 00	-29 00 30	341	3:35:53	3:36:16	3:36:38	45
La Silla	-70 43 48	-29 15 24	367	3:35:54	3:36:16	3:36:38	43
Paranal	-70 24 12	-24 37 30	121	3:35:42	3:36:10	3:36:37	54
Pico dos Dias	-45 34 57	-22 32 04	149	3:33:54	3:34:21	3:34:48	53

"Distance" is the distance between the site and the closest approach of the shadow center ("impact parameter").
Approximate shadow velocity at all non-geocentric sites is 21.3 km/sec from east to west.
Durations, Immersion, and Emersion times are all based on an approximate Charon radius of 590km.

Please direct all inquiries to Planetary Astronomy Lab (planetary-astronomy@mit.edu)

Last updated by Michael J Person (mjperson@mit.edu) 2005-06-27 11:00

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