RECON: TNO occultation with 208996

Event between (208996) 03AZ84 and star GA0920:03313642 with event index number of 2662980

Geocentric closest approach at 2028/12/30 10:51:56 UTC

J2000 position of star is 09:02:40.9 +03:50:19
Equinox of date position of star is 09:03:57.2 +03:44:29
Stellar brightness G=16.6, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 55 degrees from the moon. Moon is 98% illuminated.
Apparent brightness V=20.2

[RECON map]
Object is 43.2 AU from the Sun and 42.5 AU from the Earth.
Apparent velocity is 20.1 km/sec on the sky relative to the star, or, 2.3 arcsec/hr.
The 1-sigma error in the time of the event is 130 seconds.
The 1-sigma cross-track error in the shadow position is 1777 km.
The sky-plane scale is 30793.9 km/arcsec.

The object has an absolute magnitude Hv=3.8
Diameter=1061.7 km assuming a 5% albedo -- 53.3 sec chord
Diameter=433.5 km assuming a 30% albedo -- 21.8 sec chord
Dynamical classification is 3:2E
 
 
 
 
 
 

Star training set for 208996, (2028/12/30 10:53UT)
Object            RA         Dec     mag  sep  mel
Regulus        10:09:54.9 +11:49:28  1.3 18.17  66
Alphard        09:29:00.8 -08:47:09  2.0 13.95  66
18Ome Hya      09:07:29.9 +04:58:29  5.0  1.50  55
PPM 155391     09:06:10.5 +03:25:27  7.2  0.58  55
PPM 155364     09:05:02.9 +03:38:46  9.5  0.23  55
208996         09:04:11.9 +03:43:22 16.6        55
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 5.0 sigma about the mid-time.
The median site spacing is 28.6 km RECON observability=1.0 and success probability=0.0%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Sleaford 10:51:05 -38.6 Dark Up 38.8 206.8 Up 10:39:46 - 11:02:24 9963
Kamloops 10:51:51 -47.5 Dark Up 42.9 188.6 Up 10:40:32 - 11:03:10 9774
Kelowna 10:51:47 -47.3 Dark Up 43.6 190.0 Up 10:40:28 - 11:03:06 9718
Peachland 10:51:49 -47.5 Dark Up 43.7 189.6 Up 10:40:30 - 11:03:08 9708
Summerland 10:51:48 -47.5 Dark Up 43.9 189.7 Up 10:40:29 - 11:03:07 9697
Penticton 10:51:47 -47.5 Dark Up 43.9 189.9 Up 10:40:28 - 11:03:06 9692
Oliver 10:51:47 -47.6 Dark Up 44.3 189.9 Up 10:40:28 - 11:03:06 9665
Anarchist Mountain Observatory 10:51:47 -47.6 Dark Up 44.4 190.2 Up 10:40:28 - 11:03:06 9654
Okanogan 10:51:47 -48.0 Dark Up 45.1 190.0 Up 10:40:28 - 11:03:06 9602
Victoria 10:52:00 -50.2 Dark Up 45.2 184.7 Up 10:40:41 - 11:03:19 9592
Brewster 10:51:47 -48.2 Dark Up 45.4 189.8 Up 10:40:28 - 11:03:06 9579
Manson/Chelan 10:51:49 -48.5 Dark Up 45.6 189.3 Up 10:40:30 - 11:03:08 9561
Wenatchee 10:51:49 -48.8 Dark Up 46.1 189.2 Up 10:40:30 - 11:03:08 9522
Ellensburg 10:51:49 -49.0 Dark Up 46.5 188.9 Up 10:40:30 - 11:03:08 9488
Yakima 10:51:48 -49.2 Dark Up 46.9 189.0 Up 10:40:29 - 11:03:07 9455
Toppenish/White Swan 10:51:48 -49.2 Dark Up 47.1 189.2 Up 10:40:29 - 11:03:07 9438
PNWRO 10:51:42 -48.3 Dark Up 47.3 191.5 Up 10:40:23 - 11:03:01 9418
The Dalles 10:51:51 -50.0 Dark Up 48.0 188.2 Up 10:40:32 - 11:03:10 9370
Maupin 10:51:50 -50.0 Dark Up 48.4 188.4 Up 10:40:31 - 11:03:09 9337
Sisters 10:51:52 -50.6 Dark Up 49.3 187.9 Up 10:40:33 - 11:03:11 9261
Bend 10:51:50 -50.5 Dark Up 49.5 188.3 Up 10:40:31 - 11:03:09 9242
Oregon Observatory 10:51:51 -50.7 Dark Up 49.7 188.1 Up 10:40:32 - 11:03:10 9227
Chiloquin 10:51:51 -51.4 Dark Up 51.0 187.7 Up 10:40:32 - 11:03:10 9112
Klamath Falls 10:51:51 -51.4 Dark Up 51.4 187.9 Up 10:40:32 - 11:03:10 9083
Cedarville 10:51:44 -50.5 Dark Up 51.9 190.5 Up 10:40:25 - 11:03:03 9034
Dunrhomin 10:50:42 -39.6 Dark Up 48.8 213.3 Up 10:39:23 - 11:02:01 9031
Nikitin 10:50:43 -39.6 Dark Up 49.0 213.4 Up 10:39:24 - 11:02:02 9015
CU-SBO 10:50:43 -39.7 Dark Up 49.1 213.4 Up 10:39:24 - 11:02:02 9009
Fall River/Burney 10:51:49 -51.5 Dark Up 52.5 188.7 Up 10:40:30 - 11:03:08 8983
Gimple 10:51:45 -51.3 Dark Up 53.3 189.7 Up 10:40:26 - 11:03:04 8907
Greenville 10:51:46 -51.4 Dark Up 53.3 189.6 Up 10:40:27 - 11:03:05 8906
Quincy 10:51:46 -51.4 Dark Up 53.5 189.6 Up 10:40:27 - 11:03:05 8888
Portola 10:51:44 -51.1 Dark Up 53.6 190.5 Up 10:40:25 - 11:03:03 8881
Reno 10:51:41 -50.7 Dark Up 53.8 191.6 Up 10:40:22 - 11:03:00 8861
Carson City 10:51:40 -50.7 Dark Up 54.1 191.7 Up 10:40:21 - 11:02:59 8829
Yerington 10:51:38 -50.3 Dark Up 54.2 192.8 Up 10:40:19 - 11:02:57 8816
Gardnerville 10:51:41 -50.7 Dark Up 54.3 191.9 Up 10:40:22 - 11:03:00 8808
Hawthorne 10:51:35 -50.0 Dark Up 54.6 193.9 Up 10:40:16 - 11:02:54 8778
Lee Vining 10:51:37 -50.4 Dark Up 55.2 193.2 Up 10:40:18 - 11:02:56 8724
Bishop 10:51:33 -50.0 Dark Up 55.6 194.7 Up 10:40:14 - 11:02:52 8674
Beatty 10:51:26 -48.8 Dark Up 55.7 197.6 Up 10:40:07 - 11:02:45 8643
Patrick 10:51:12 -46.6 Dark Up 56.3 203.2 Up 10:39:53 - 11:02:31 8528
Laughlin/Bullhead City 10:51:15 -47.2 Dark Up 56.8 202.2 Up 10:39:56 - 11:02:34 8499
Lake Havasu City 10:51:13 -47.0 Dark Up 57.3 203.0 Up 10:39:54 - 11:02:32 8438
George/Scottsdale 10:51:02 -45.0 Dark Up 57.2 207.7 Up 10:39:43 - 11:02:21 8384
Wildwood 10:51:32 -50.5 Dark Up 58.8 195.6 Up 10:40:13 - 11:02:51 8368
Idyllwild 10:51:22 -49.0 Dark Up 58.7 199.2 Up 10:40:03 - 11:02:41 8348
Calipatria 10:51:18 -48.0 Dark Up 59.0 201.7 Up 10:39:59 - 11:02:37 8299
Yuma 10:51:13 -47.3 Dark Up 59.1 203.6 Up 10:39:54 - 11:02:32 8264

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 208996, (2028/12/30 10:53UT)
Object            RA         Dec     mag  sep  mel
Regulus        10:08:21.9 +11:58:02  1.3 18.17  66
Alphard        09:27:35.2 -08:39:30  2.0 13.95  66
18Ome Hya      09:05:58.3 +05:05:32  5.0  1.50  55
PPM 155391     09:04:39.7 +03:32:28  7.2  0.58  55
PPM 155364     09:03:31.9 +03:45:45  9.5  0.23  55
208996         09:02:40.9 +03:50:19 16.6        55
Positions are for J2000

Event circumstances last updated at 2024/04/24 02:56:27 UT

Marc W. Buie, Southwest Research Institute

RECON