RECON: TNO occultation with 84522

Event between (84522) 02TC302 and star GA1300:01029242 with event index number of 2437583

Geocentric closest approach at 2028/08/30 20:04:01 UTC

J2000 position of star is 03:20:05.3 +40:05:19
Equinox of date position of star is 03:21:40.6 +40:10:29
Stellar brightness G=16.5, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 123 degrees from the moon. Moon is 85% illuminated.
Apparent brightness V=20.3

Object is 42.3 AU from the Sun and 42.1 AU from the Earth.
Apparent velocity is 12.8 km/sec on the sky relative to the star, or, 1.5 arcsec/hr.
The 1-sigma error in the time of the event is 190 seconds.
The 1-sigma cross-track error in the shadow position is 2441 km.

The object has an absolute magnitude Hv=3.9
Diameter=981.8 km assuming a 5% albedo -- 77.5 sec chord
Diameter=400.8 km assuming a 30% albedo -- 31.6 sec chord
Dynamical classification is 5:2EEE
 
 
 
 
 
 
 
 

Star training set for 84522, (2028/08/30 20:03UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:37:34.1 +16:33:53  0.8 28.75 137
Algol          03:10:02.8 +41:03:50  2.1  2.43 121
PPM 046142     03:27:03.9 +41:21:24  6.4  1.51 124
PPM 046129     03:26:19.8 +40:08:37  8.5  0.83 124
PPM 046023     03:21:02.6 +40:16:30  9.2  0.20 123
84522          03:21:58.3 +40:11:27 16.5       124
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 84522, (2028/08/30 20:03UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:35:55.3 +16:30:29  0.8 28.75 137
Algol          03:08:10.1 +40:57:20  2.1  2.43 121
PPM 046142     03:25:09.4 +41:15:27  6.4  1.51 124
PPM 046129     03:24:26.5 +40:02:38  8.5  0.83 124
PPM 046023     03:19:09.6 +40:10:20  9.2  0.20 123
84522          03:20:05.3 +40:05:19 16.5       123
Positions are for J2000

Event circumstances last updated at 2024/03/07 04:41:33 UT

Marc W. Buie, Southwest Research Institute

RECON