RECON: TNO occultation with 73480

Event between (73480) 02PN34 and star GA1220:00519000 with event index number of 2647011

Geocentric closest approach at 2022/09/05 02:03:33 UTC

J2000 position of star is 02:58:18.3 +33:27:42
Equinox of date position of star is 02:59:40.4 +33:32:58
Stellar brightness G=15.9, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 141 degrees from the moon. Moon is 65% illuminated.
TNO apparent brightness V=22.9

TNO is 26.4 AU from the Sun and 26.0 AU from the Earth.
The TNO is moving 9.0 km/sec on the sky relative to the star, or, 1.7 arcsec/hr.
The 1-sigma error in the time of the event is 155 seconds.
The 1-sigma cross-track error in the shadow position is 1573 km.

The TNO has an absolute magnitude Hv=8.5
Diameter=118.6 km assuming a 5% albedo -- 13.2 sec chord
Diameter=48.4 km assuming a 30% albedo -- 5.4 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 
 
 

Star training set for 73480, (2022/09/05 02:04UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:37:13.5 +16:33:11  0.8 27.74 158
Algol          03:09:39.2 +41:02:29  2.1  7.75 142
21 Per         02:58:40.3 +32:01:27  5.1  1.54 140
PPM 067985     03:01:00.4 +33:56:02  8.1  0.47 141
PPM 067968     03:00:10.8 +33:12:25  8.8  0.36 141
73480          02:59:42.2 +33:33:05 15.9       141
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 73480, (2022/09/05 02:04UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:35:55.3 +16:30:29  0.8 27.74 158
Algol          03:08:10.1 +40:57:20  2.1  7.75 142
21 Per         02:57:17.3 +31:56:02  5.1  1.54 140
PPM 067985     02:59:36.3 +33:50:41  8.1  0.47 141
PPM 067968     02:58:47.1 +33:07:03  8.8  0.36 141
73480          02:58:18.3 +33:27:42 15.9       141
Positions are for J2000

Event circumstances last updated at 2022/03/16 00:57:46 UT

Marc W. Buie, Southwest Research Institute

RECON