Archive of Previous Predictions:

Charon Occultation of C313.2

Prediction Version

Date & Time of Prediction

(y m d)

Date and Time

(y m d h:s)

Minimum Separation

(arcsec)

C313.2 Right Ascension (J2000)

(h m s)

C313.2 Declination (J2000)

(d m s)

Pluto Barycenter Right Ascension Offset

(arcsec)

Pluto Barycenter Declination Offset

(arcsec)

Position Angle

(deg)

Data Used Notes
C313.2-U2.0-1.0

2004 09 18

11:03 AM EDT

2005 07 11

03:38 UT

0.008 ±0.030 17 28 55.0174 –15 00 54.750

Offset:

0.00

Offset:

0.00

173.7 UCAC2 Catalogue and PLU006 ephemeris

A, B

(see below)

C313.2-RCS-1.0

2005 01 25

16:50 PM EDT

2005 07 11

03:39 UT

0.058 ±0.028

Offset:

+0.0038

± 0.0283

Offset:

–0.044

±0.028

Offset:

0.00

Offset:

0.00

173.7 11 observations at FASTT at USNO by Ron Stone and PLU006 ephemeris

A, B, C

(see below)

C313.2-U2.0-2.0

2005 05 25

15:00 PM EDT

2005 07 11

03:37 UT

0.035 ±0.020

Offset:

0.00

Offset:

0.00

Offset:

0.00

Offset:

0.00

173.7 UCAC2 Catalogue and PLU013 ephemeris

A, C

(see below)

C313.2-U2.0-2.1

2005 06 10

15:00 PM EDT

2005 07 11

03:36 UT

0.058 ±0.005

Offset: +0.0046

±0.0041

Offset: +0.0240

±0.0050

Offset:

0.00

Offset:

0.00

173.7 157 strip scans and PLU013 ephemeris

A, C, D

(see below)

C313.2-U2.0-2.2

2005 06 27

11:00 PM EDT

2005 07 11

03:37 UT

0.055 ±0.008

Offset: +0.0098

± 0.0028

Offset: +0.0291

± 0.0037

Offset: –0.0040

±0.0066

Offset: +0.0084

± 0.0064

173.7 244 strip scans and offsets to PLU013 ephemeris

A, C, D

(see below)

C313.2-USNO-1.0

2005 07 08

15:00 PM EDT

2005 07 11

03:36 UT

0.058 ±0.002

Offset: –0.0163

± 0.0010

Offset: +0.0350

± 0.0019

Offset: –0.0026

±0.0020

Offset: –0.0311

± 0.0040

173.7

23 USNO frames

 

 

C313.2-USNO-1.1

2005 07 09

15:00 PM EDT

2005 07 11

03:37 UT

0.100 ±0.004

Offset: –0.0151

± 0.0010

Offset: +0.0340

± 0.0017

Offset: –0.0004

±0.0020

Offset: –0.0325

± 0.0033

173.7 28 USNO frames  

NOTES

A) The separation between the center line and each of the limb lines is an estimated Charon radius. (590 km)

B) The ephemeris used in this prediction is that generated for Charon with JPL's Horizon's Ephemeris service (corrected for Light Travel time). Ephemeris Files used included PLU006.

C) The ephemeris used in this prediction is that generated for Charon with JPL's Horizon's Ephemeris service (corrected for Light Travel time). Ephemeris Files used included PLU013.

D) Results for C313.2 are tabulated as offsets from the position given in prediction version C313.2-U2.0-1.0. Results for Charon (if any) are tabulated as offsets from the unmodified JPL Horizon's ephemeris. Strip scan reduction includes simultaneous least-squares point spread fitting to Pluto and Charon as well as C313.2, and uses the UCAC2 catalog for astrometric calibration.

 

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

Last updated by Emily A Kramer (ekramer@mit.edu) 2005 07 09