RECON: TNO occultation with 553893

Event between (553893) 12BW154 and star GA0980:03726751 with event index number of 2226331

Geocentric closest approach at 2028/05/01 08:07:06 UTC

J2000 position of star is 11:49:40.3 +09:21:48
Equinox of date position of star is 11:50:55.0 +09:13:43
Stellar brightness G=15.1, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 53 degrees from the moon. Moon is 42% illuminated.
Apparent brightness V=21.8

[RECON map]
Object is 41.4 AU from the Sun and 40.7 AU from the Earth.
Apparent velocity is 15.8 km/sec on the sky relative to the star, or, 1.9 arcsec/hr.
The 1-sigma error in the time of the event is 189 seconds.
The 1-sigma cross-track error in the shadow position is 2349 km.
The sky-plane scale is 29497.1 km/arcsec.

The object has an absolute magnitude Hv=5.6
Diameter=457.1 km assuming a 5% albedo -- 29.3 sec chord
Diameter=186.6 km assuming a 30% albedo -- 11.9 sec chord
Dynamical classification is CLASSICAL
 
 
 
 
 
 

Star training set for 553893, (2028/05/01 08:07UT)
Object            RA         Dec     mag  sep  mel
Regulus        10:09:52.8 +11:49:39  1.3 25.02  28
Denebola       11:50:30.4 +14:24:50  2.1  5.21  51
4 Vir          11:49:22.2 +08:05:18  5.2  1.20  53
PPM 158257     11:51:56.3 +09:37:09  8.3  0.46  53
PPM 158238     11:50:58.5 +09:16:22 10.0  0.08  53
553893         11:51:07.7 +09:12:20 15.1        53
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 4.8 sigma about the mid-time.
The median site spacing is 19.8 km RECON observability=1.0 and success probability=9.5%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Sleaford 08:04:46 -21.2 Dark Up 26.9 249.2 Low 07:49:46 - 08:19:46 -2801
Kamloops 08:05:17 -24.0 Dark Up 35.5 236.3 Up 07:50:17 - 08:20:17 -3146
Kelowna 08:05:10 -24.8 Dark Up 35.5 237.6 Up 07:50:10 - 08:20:10 -3183
Peachland 08:05:10 -24.9 Dark Up 35.7 237.4 Up 07:50:10 - 08:20:10 -3195
Summerland 08:05:09 -25.1 Dark Up 35.7 237.6 Up 07:50:09 - 08:20:09 -3204
Penticton 08:05:08 -25.2 Dark Up 35.7 237.7 Up 07:50:08 - 08:20:08 -3206
Oliver 08:05:07 -25.5 Dark Up 35.9 237.9 Up 07:50:07 - 08:20:07 -3230
Anarchist Mountain Observatory 08:05:05 -25.7 Dark Up 35.9 238.2 Up 07:50:05 - 08:20:05 -3237
Okanogan 08:05:03 -26.3 Dark Up 36.4 238.4 Up 07:50:03 - 08:20:03 -3286
Brewster 08:05:02 -26.6 Dark Up 36.6 238.4 Up 07:50:02 - 08:20:02 -3308
Manson/Chelan 08:05:03 -26.8 Dark Up 36.9 238.1 Up 07:50:03 - 08:20:03 -3330
Victoria 08:05:17 -26.2 Dark Up 38.4 234.4 Up 07:50:17 - 08:20:17 -3350
Wenatchee 08:05:01 -27.3 Dark Up 37.3 238.3 Up 07:50:01 - 08:20:01 -3366
Ellensburg 08:05:00 -27.7 Dark Up 37.6 238.3 Up 07:50:00 - 08:20:00 -3400
Yakima 08:04:59 -28.1 Dark Up 37.9 238.5 Up 07:49:59 - 08:19:59 -3429
PNWRO 08:04:50 -28.7 Dark Up 37.2 240.5 Up 07:49:50 - 08:19:50 -3437
Toppenish/White Swan 08:04:57 -28.3 Dark Up 37.9 238.8 Up 07:49:57 - 08:19:57 -3441
The Dalles 08:04:56 -29.1 Dark Up 38.8 238.6 Up 07:49:56 - 08:19:56 -3513
Maupin 08:04:54 -29.5 Dark Up 38.9 239.0 Up 07:49:54 - 08:19:54 -3542
Dunrhomin 08:03:42 -32.4 Dark Down 30.2 255.8 Up 07:48:42 - 08:18:42 -3571
Nikitin 08:03:41 -32.6 Dark Down 30.2 255.9 Up 07:48:41 - 08:18:41 -3585
CU-SBO 08:03:42 -32.7 Dark Down 30.3 255.8 Up 07:48:42 - 08:18:42 -3592
Sisters 08:04:51 -30.4 Dark Up 39.7 239.1 Up 07:49:51 - 08:19:51 -3617
Bend 08:04:50 -30.7 Dark Up 39.6 239.5 Up 07:49:50 - 08:19:50 -3629
Oregon Observatory 08:04:50 -30.8 Dark Up 39.8 239.5 Up 07:49:50 - 08:19:50 -3645
Chiloquin 08:04:45 -32.2 Dark Up 40.7 240.0 Up 07:49:45 - 08:19:45 -3754
Klamath Falls 08:04:44 -32.5 Dark Up 40.9 240.3 Up 07:49:44 - 08:19:44 -3779
Cedarville 08:04:35 -33.2 Dark Up 40.2 242.4 Up 07:49:35 - 08:19:35 -3797
Fall River/Burney 08:04:37 -33.7 Dark Up 41.2 241.6 Up 07:49:37 - 08:19:37 -3863
Gimple 08:04:32 -34.6 Dark Up 41.3 242.8 Up 07:49:32 - 08:19:32 -3923
Greenville 08:04:32 -34.6 Dark Up 41.3 242.7 Up 07:49:32 - 08:19:32 -3925
Portola 08:04:29 -34.9 Dark Up 41.2 243.4 Up 07:49:29 - 08:19:29 -3940
Quincy 08:04:32 -34.8 Dark Up 41.4 242.9 Up 07:49:32 - 08:19:32 -3941
Reno 08:04:26 -35.1 Dark Up 40.9 244.2 Up 07:49:26 - 08:19:26 -3947
Carson City 08:04:24 -35.5 Dark Up 41.0 244.5 Up 07:49:24 - 08:19:24 -3975
Yerington 08:04:20 -35.7 Dark Up 40.6 245.2 Up 07:49:20 - 08:19:20 -3976
Gardnerville 08:04:23 -35.7 Dark Up 41.1 244.7 Up 07:49:23 - 08:19:23 -3994
Hawthorne 08:04:16 -36.1 Dark Up 40.5 246.0 Up 07:49:16 - 08:19:16 -4002
Lee Vining 08:04:17 -36.7 Dark Up 41.1 246.1 Up 07:49:17 - 08:19:17 -4059
Bishop 08:04:11 -37.3 Dark Up 40.8 247.2 Up 07:49:11 - 08:19:11 -4092
Beatty 08:04:03 -37.6 Dark Up 39.8 248.9 Up 07:49:03 - 08:19:03 -4092
Patrick 08:03:46 -38.8 Dark Up 38.1 252.3 Up 07:48:46 - 08:18:46 -4148
Laughlin/Bullhead City 08:03:49 -39.1 Dark Up 38.7 251.9 Up 07:48:49 - 08:18:49 -4186
Lake Havasu City 08:03:45 -39.7 Dark Up 38.7 252.6 Up 07:48:45 - 08:18:45 -4237
George/Scottsdale 08:03:32 -40.1 Dark Down 37.0 255.0 Up 07:48:32 - 08:18:32 -4244
Idyllwild 08:03:50 -40.8 Dark Up 40.8 251.4 Up 07:48:50 - 08:18:50 -4358
Wildwood 08:03:59 -40.5 Dark Up 42.2 249.6 Up 07:48:59 - 08:18:59 -4373
Calipatria 08:03:43 -41.2 Dark Up 40.1 252.8 Up 07:48:43 - 08:18:43 -4383
Yuma 08:03:38 -41.6 Dark Up 39.5 253.8 Up 07:48:38 - 08:18:38 -4398

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 553893, (2028/05/01 08:07UT)
Object            RA         Dec     mag  sep  mel
Regulus        10:08:21.9 +11:58:02  1.3 25.02  28
Denebola       11:49:02.9 +14:34:17  2.1  5.21  51
4 Vir          11:47:54.8 +08:14:45  5.2  1.20  53
PPM 158257     11:50:28.9 +09:46:37  8.3  0.46  53
PPM 158238     11:49:31.1 +09:25:50 10.0  0.08  53
553893         11:49:40.3 +09:21:48 15.1        53
Positions are for J2000

Event circumstances last updated at 2024/03/19 04:09:08 UT

Marc W. Buie, Southwest Research Institute

RECON