RECON: TNO occultation with 24978

Event between (24978) 98HJ151 and star GA0640:12689615 with event index number of 257153

Geocentric closest approach at 2020/04/29 00:35:26 UTC

J2000 position of star is 17:15:24.1 -24:12:39
Equinox of date position of star is 17:16:31.7 -24:13:50
Stellar brightness G=15.6, use SENSEUP=128
Star is 153 degrees from the moon. Moon is 31% illuminated.
TNO apparent brightness V=23.9

TNO is 42.9 AU from the Sun and 42.2 AU from the Earth.
The TNO is moving 17.5 km/sec on the sky relative to the star, or, 2.1 arcsec/hr.
The 1-sigma error in the time of the event is 1673 seconds.
The 1-sigma cross-track error in the shadow position is 3979 km.

The TNO has an absolute magnitude Hv=7.5
Diameter=190.6 km assuming a 5% albedo -- 10.9 sec chord
Diameter=77.8 km assuming a 30% albedo -- 4.4 sec chord
Dynamical classification is CLASSICAL
 
 
 
 
 
 
 
 

Star training set for 24978, (2020/04/29 00:35UT)
Object            RA         Dec     mag  sep  mel
Antares        16:30:39.4 -26:28:31  0.9 10.62 143
35Eta Oph      17:11:32.7 -15:44:55  2.6  8.57 150
PPM 266746     17:22:56.5 -24:55:29  6.5  1.59 155
PPM 266603     17:16:01.8 -24:04:56  8.4  0.21 153
24978          17:16:38.6 -24:13:57 15.6       154
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 24978, (2020/04/29 00:35UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9 10.62 143
35Eta Oph      17:10:22.7 -15:43:29  2.6  8.57 150
PPM 266746     17:21:41.5 -24:54:23  6.5  1.59 155
PPM 266603     17:14:47.4 -24:03:37  8.4  0.21 153
24978          17:15:24.1 -24:12:39 15.6       153
Positions are for J2000

Event circumstances last updated at 2018/06/12 20:01:07 UT

Marc W. Buie, Southwest Research Institute

RECON