RECON: TNO occultation with 33001

Event between (33001) 97CU29 and star GA1040:03300914 with event index number of 248238

Geocentric closest approach at 2020/02/22 14:42:31 UTC

J2000 position of star is 09:29:49.0 +15:35:14
Equinox of date position of star is 09:30:53.2 +15:30:05
Stellar brightness G=15.4, use SENSEUP=128
Star is 176 degrees from the moon. Moon is 1% illuminated.
TNO apparent brightness V=22.4

TNO is 44.2 AU from the Sun and 43.2 AU from the Earth.
The TNO is moving 25.0 km/sec on the sky relative to the star, or, 2.9 arcsec/hr.
The 1-sigma error in the time of the event is 187 seconds.
The 1-sigma cross-track error in the shadow position is 3172 km.

The TNO has an absolute magnitude Hv=6.0
Diameter=380.2 km assuming a 5% albedo -- 15.2 sec chord
Diameter=155.2 km assuming a 30% albedo -- 6.2 sec chord
Dynamical classification is CLASSICAL
 
 
 
 
 
 
 
 

Star training set for 33001, (2020/02/22 14:43UT)
Object            RA         Dec     mag  sep  mel
Regulus        10:09:26.6 +11:52:05  1.3 10.03 172
PPM 126439     09:26:39.3 +16:29:51  6.3  1.43 176
PPM 126542     09:32:45.5 +15:40:50  8.5  0.48 177
PPM 126517     09:31:26.5 +15:22:00  9.9  0.18 176
33001          09:30:55.5 +15:29:53 15.4       177
Positions are for equinox of date

Azimuth is measured in degrees eastward from north. North is at an azimuth of 0, due East is at an azimuth of 90 degrees, due South is 180, and due West is 270.

Do not use the listing below for the RECON CPC 1100 telescopes. This is provided for other non-team facilities.

Star training set for 33001, (2020/02/22 14:43UT)
Object            RA         Dec     mag  sep  mel
Regulus        10:08:22.0 +11:58:02  1.3 10.03 172
PPM 126439     09:25:32.4 +16:35:07  6.3  1.43 176
PPM 126542     09:31:39.0 +15:46:12  8.5  0.48 177
PPM 126517     09:30:20.1 +15:27:21  9.9  0.18 176
33001          09:29:49.0 +15:35:14 15.4       176
Positions are for J2000

Event circumstances last updated at 2019/06/07 23:17:56 UT

Marc W. Buie, Southwest Research Institute

RECON