RECON: TNO occultation with 15820

Event between (15820) 94TB and star GA1220:01836218 with event index number of 1773118

Geocentric closest approach at 2027/11/14 15:29:36 UTC

J2000 position of star is 05:30:13.9 +33:33:15
Equinox of date position of star is 05:31:49.4 +33:34:16
Stellar brightness G=15.6, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 26 degrees from the moon. Moon is 100% illuminated.
Apparent brightness V=22.1

Object is 27.6 AU from the Sun and 26.8 AU from the Earth.
Apparent velocity is 19.4 km/sec on the sky relative to the star, or, 3.6 arcsec/hr.
The 1-sigma error in the time of the event is 367 seconds.
The 1-sigma cross-track error in the shadow position is 1439 km.

The object has an absolute magnitude Hv=7.6
Diameter=183.7 km assuming a 5% albedo -- 9.4 sec chord
Diameter=75.0 km assuming a 30% albedo -- 3.8 sec chord
Dynamical classification is 3:2E
 
 
 
 
 
 
 
 

Star training set for 15820, (2027/11/14 15:29UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:37:31.4 +16:33:48  0.8 20.97  15
Alnath         05:28:03.4 +28:37:43  1.6  5.02  24
PPM 070534     05:35:16.9 +32:49:05  6.5  1.01  26
PPM 070391     05:29:36.4 +33:58:01  7.7  0.65  25
PPM 070471     05:32:04.2 +33:33:29  9.1  0.02  26
15820          05:32:04.1 +33:34:25 15.6        26
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 15820, (2027/11/14 15:29UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:35:55.3 +16:30:29  0.8 20.97  15
Alnath         05:26:17.6 +28:36:23  1.6  5.02  24
PPM 070534     05:33:27.4 +32:48:03  6.5  1.01  26
PPM 070391     05:27:45.9 +33:56:45  7.7  0.65  25
PPM 070471     05:30:14.0 +33:32:19  9.1  0.02  26
15820          05:30:13.9 +33:33:15 15.6        26
Positions are for J2000

Event circumstances last updated at 2024/02/25 04:11:05 UT

Marc W. Buie, Southwest Research Institute

RECON