RECON: TNO occultation with 612148

Event between (612148) 00CG105 and star GA0860:04010274 with event index number of 2806672

Geocentric closest approach at 2023/12/24 11:01:51 UTC

J2000 position of star is 10:23:10.8 -02:53:02
Equinox of date position of star is 10:24:23.8 -03:00:21
Stellar brightness G=15.2, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 98 degrees from the moon. Moon is 93% illuminated.
Apparent brightness V=23.5

[RECON map]
Object is 47.3 AU from the Sun and 46.9 AU from the Earth.
Apparent velocity is 11.2 km/sec on the sky relative to the star, or, 1.2 arcsec/hr.
The 1-sigma error in the time of the event is 497 seconds.
The 1-sigma cross-track error in the shadow position is 5749 km.
The sky-plane scale is 34034.4 km/arcsec.

The object has an absolute magnitude Hv=6.6
Diameter=284.5 km assuming a 5% albedo -- 25.4 sec chord
Diameter=116.1 km assuming a 30% albedo -- 10.3 sec chord
Dynamical classification is SCATEXTD
 
 
 
 
 
 

Star training set for 612148, (2023/12/24 11:02UT)
Object            RA         Dec     mag  sep  mel
Regulus        10:09:38.8 +11:50:57  1.3 15.30  88
Alphard        09:28:46.0 -08:45:49  2.0 14.98  87
PPM 193381     10:24:45.6 -03:45:54  6.4  0.76  98
PPM 178168     10:25:02.0 -02:23:53  8.2  0.63  98
PPM 193379     10:24:43.9 -03:06:34  9.4  0.13  98
612148         10:24:23.9 -03:00:21 15.2        98
Positions are for equinox of date

This table contains the target star visibility for the RECON network. The observing range has been set to a maximum of 1.8 sigma about the mid-time.
The median site spacing is 21.2 km RECON observability=1.0 and success probability=4.0%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Kamloops 11:01:02 -45.9 Dark Up 34.2 157.9 Up 10:46:02 - 11:16:02 8972
Victoria 11:01:28 -48.5 Dark Up 35.4 153.8 Up 10:46:28 - 11:16:28 8926
Peachland 11:01:02 -45.9 Dark Up 35.2 158.3 Up 10:46:02 - 11:16:02 8909
Kelowna 11:01:01 -45.7 Dark Up 35.2 158.7 Up 10:46:01 - 11:16:01 8908
Summerland 11:01:03 -45.9 Dark Up 35.4 158.4 Up 10:46:03 - 11:16:03 8899
Penticton 11:01:03 -45.8 Dark Up 35.5 158.5 Up 10:46:03 - 11:16:03 8893
Oliver 11:01:03 -45.9 Dark Up 35.8 158.4 Up 10:46:03 - 11:16:03 8873
Anarchist Mountain Observatory 11:01:03 -45.9 Dark Up 36.0 158.6 Up 10:46:03 - 11:16:03 8860
Okanogan 11:01:07 -46.2 Dark Up 36.6 158.2 Up 10:46:07 - 11:16:07 8828
Brewster 11:01:09 -46.4 Dark Up 36.8 157.9 Up 10:46:09 - 11:16:09 8818
Manson/Chelan 11:01:13 -46.7 Dark Up 36.9 157.4 Up 10:46:13 - 11:16:13 8815
Wenatchee 11:01:15 -46.9 Dark Up 37.3 157.1 Up 10:46:15 - 11:16:15 8792
Ellensburg 11:01:19 -47.2 Dark Up 37.6 156.7 Up 10:46:19 - 11:16:19 8773
Yakima 11:01:23 -47.3 Dark Up 38.0 156.6 Up 10:46:23 - 11:16:23 8750
Toppenish/White Swan 11:01:21 -47.3 Dark Up 38.2 156.7 Up 10:46:21 - 11:16:21 8733
Sleaford 10:59:36 -37.1 Dark Up 34.9 175.0 Up 10:44:36 - 11:14:36 8715
The Dalles 11:01:29 -48.0 Dark Up 38.7 155.5 Up 10:46:29 - 11:16:29 8706
Maupin 11:01:30 -48.0 Dark Up 39.1 155.5 Up 10:46:30 - 11:16:30 8678
PNWRO 11:01:13 -46.4 Dark Up 38.9 158.4 Up 10:46:13 - 11:16:13 8674
Sisters 11:01:39 -48.6 Dark Up 39.8 154.6 Up 10:46:39 - 11:16:39 8637
Bend 11:01:36 -48.5 Dark Up 40.1 154.9 Up 10:46:36 - 11:16:36 8616
Oregon Observatory 11:01:38 -48.6 Dark Up 40.2 154.7 Up 10:46:38 - 11:16:38 8608
Chiloquin 11:01:45 -49.2 Dark Up 41.2 153.7 Up 10:46:45 - 11:16:45 8535
Klamath Falls 11:01:48 -49.2 Dark Up 41.6 153.7 Up 10:46:48 - 11:16:48 8511
Cedarville 11:01:40 -48.2 Dark Up 42.7 155.4 Up 10:46:40 - 11:16:40 8424
Fall River/Burney 11:01:50 -49.2 Dark Up 42.8 153.7 Up 10:46:50 - 11:16:50 8424
Greenville 11:01:51 -49.0 Dark Up 43.7 153.9 Up 10:46:51 - 11:16:51 8351
Gimple 11:01:50 -49.0 Dark Up 43.8 154.0 Up 10:46:50 - 11:16:50 8348
Quincy 11:01:52 -49.1 Dark Up 43.9 153.8 Up 10:46:52 - 11:16:52 8337
Portola 11:01:49 -48.7 Dark Up 44.2 154.4 Up 10:46:49 - 11:16:49 8316
Reno 11:01:50 -48.3 Dark Up 44.6 155.1 Up 10:46:50 - 11:16:50 8280
Carson City 11:01:47 -48.3 Dark Up 45.0 155.0 Up 10:46:47 - 11:16:47 8254
Gardnerville 11:01:53 -48.3 Dark Up 45.2 155.0 Up 10:46:53 - 11:16:53 8236
Yerington 11:01:44 -47.9 Dark Up 45.4 155.7 Up 10:46:44 - 11:16:44 8223
Hawthorne 11:01:44 -47.5 Dark Up 45.9 156.3 Up 10:46:44 - 11:16:44 8175
Lee Vining 11:01:48 -48.0 Dark Up 46.3 155.4 Up 10:46:48 - 11:16:48 8149
Bishop 11:01:47 -47.5 Dark Up 47.1 156.1 Up 10:46:47 - 11:16:47 8085
Beatty 11:01:37 -46.2 Dark Up 48.0 158.2 Up 10:46:37 - 11:16:37 8004
Dunrhomin 11:00:06 -37.4 Dark Up 46.8 175.3 Up 10:45:06 - 11:15:06 7914
Nikitin 11:00:04 -37.4 Dark Up 46.9 175.3 Up 10:45:04 - 11:15:04 7901
CU-SBO 11:00:04 -37.4 Dark Up 47.0 175.1 Up 10:45:04 - 11:15:04 7899
Wildwood 11:02:04 -47.8 Dark Up 50.0 154.4 Up 10:47:04 - 11:17:04 7845
Laughlin/Bullhead City 11:01:27 -44.6 Dark Up 50.2 160.6 Up 10:46:27 - 11:16:27 7808
Patrick 11:01:22 -44.0 Dark Up 50.2 161.7 Up 10:46:22 - 11:16:22 7806
Idyllwild 11:01:51 -46.2 Dark Up 51.0 156.9 Up 10:46:51 - 11:16:51 7762
Lake Havasu City 11:01:30 -44.3 Dark Up 51.0 160.7 Up 10:46:30 - 11:16:30 7748
Calipatria 11:01:41 -45.3 Dark Up 51.9 158.3 Up 10:46:41 - 11:16:41 7677
Yuma 11:01:37 -44.5 Dark Up 52.6 159.5 Up 10:46:37 - 11:16:37 7615
George/Scottsdale 11:01:13 -42.3 Dark Up 52.3 164.2 Up 10:46:13 - 11:16:13 7612

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 612148, (2023/12/24 11:02UT)
Object            RA         Dec     mag  sep  mel
Regulus        10:08:21.9 +11:58:02  1.3 15.30  88
Alphard        09:27:35.2 -08:39:30  2.0 14.98  87
PPM 193381     10:23:32.7 -03:38:34  6.4  0.76  98
PPM 178168     10:23:48.8 -02:16:34  8.2  0.63  98
PPM 193379     10:23:30.9 -02:59:15  9.4  0.13  98
612148         10:23:10.8 -02:53:02 15.2        98
Positions are for J2000

Event circumstances last updated at 2023/12/22 05:44:19 UT

Marc W. Buie, Southwest Research Institute

RECON