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 08:06:54 UTC

J2000 position of star is 11:49:40.3 +09:21:48
Equinox of date position of star is 11:50:48.5 +09:14:25
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.
TNO apparent brightness V=21.8

[RECON map]
TNO is 41.4 AU from the Sun and 40.7 AU from the Earth.
The TNO is moving 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 264 seconds.
The 1-sigma cross-track error in the shadow position is 3125 km.
The sky-plane scale is 29497.1 km/arcsec.

The TNO has an absolute magnitude Hv=5.6
Diameter=457.1 km assuming a 5% albedo -- 28.9 sec chord
Diameter=186.6 km assuming a 30% albedo -- 11.8 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 3.4 sigma about the mid-time.
The median site spacing is 22.0 km RECON observability=1.0 and success probability=10.3%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Sleaford 08:04:34 -21.2 Dark Up 27.0 249.1 Low 07:49:34 - 08:19:34 -2825
Kamloops 08:05:05 -24.0 Dark Up 35.5 236.2 Up 07:50:05 - 08:20:05 -3169
Kelowna 08:04:58 -24.8 Dark Up 35.5 237.6 Up 07:49:58 - 08:19:58 -3206
Peachland 08:04:59 -24.9 Dark Up 35.7 237.3 Up 07:49:59 - 08:19:59 -3219
Summerland 08:04:58 -25.1 Dark Up 35.8 237.5 Up 07:49:58 - 08:19:58 -3227
Penticton 08:04:56 -25.2 Dark Up 35.7 237.7 Up 07:49:56 - 08:19:56 -3229
Oliver 08:04:55 -25.5 Dark Up 35.9 237.9 Up 07:49:55 - 08:19:55 -3253
Anarchist Mountain Observatory 08:04:54 -25.7 Dark Up 35.9 238.2 Up 07:49:54 - 08:19:54 -3260
Tonasket 08:04:52 -26.0 Dark Up 36.1 238.3 Up 07:49:52 - 08:19:52 -3283
Okanogan 08:04:52 -26.3 Dark Up 36.4 238.3 Up 07:49:52 - 08:19:52 -3309
Brewster 08:04:50 -26.6 Dark Up 36.6 238.3 Up 07:49:50 - 08:19:50 -3332
Manson/Chelan 08:04:51 -26.8 Dark Up 37.0 238.1 Up 07:49:51 - 08:19:51 -3353
Victoria 08:05:04 -26.2 Dark Up 38.4 234.4 Up 07:50:04 - 08:20:04 -3373
Wenatchee 08:04:49 -27.3 Dark Up 37.3 238.2 Up 07:49:49 - 08:19:49 -3390
Ellensburg 08:04:48 -27.7 Dark Up 37.7 238.2 Up 07:49:48 - 08:19:48 -3423
Yakima 08:04:47 -28.1 Dark Up 37.9 238.5 Up 07:49:47 - 08:19:47 -3452
PNWRO 08:04:38 -28.7 Dark Up 37.2 240.5 Up 07:49:38 - 08:19:38 -3460
Toppenish/White Swan 08:04:45 -28.3 Dark Up 37.9 238.8 Up 07:49:45 - 08:19:45 -3464
Goldendale 08:04:44 -28.9 Dark Up 38.4 238.7 Up 07:49:44 - 08:19:44 -3513
The Dalles 08:04:45 -29.1 Dark Up 38.8 238.5 Up 07:49:45 - 08:19:45 -3537
Maupin 08:04:42 -29.5 Dark Up 38.9 238.9 Up 07:49:42 - 08:19:42 -3565
Dunrhomin 08:03:31 -32.4 Dark Down 30.2 255.7 Up 07:48:31 - 08:18:31 -3595
Sisters 08:04:40 -30.4 Dark Up 39.7 239.0 Up 07:49:40 - 08:19:40 -3640
Bend 08:04:38 -30.7 Dark Up 39.7 239.4 Up 07:49:38 - 08:19:38 -3652
Oregon Observatory 08:04:37 -30.8 Dark Up 39.8 239.4 Up 07:49:37 - 08:19:37 -3668
North Lake 08:04:33 -31.5 Dark Up 39.8 240.4 Up 07:49:33 - 08:19:33 -3705
Lakeview 08:04:27 -32.5 Dark Up 40.0 241.7 Up 07:49:27 - 08:19:27 -3774
Chiloquin 08:04:34 -32.2 Dark Up 40.8 240.0 Up 07:49:34 - 08:19:34 -3777
Klamath Falls 08:04:32 -32.5 Dark Up 40.9 240.3 Up 07:49:32 - 08:19:32 -3802
Cedarville 08:04:23 -33.2 Dark Up 40.2 242.3 Up 07:49:23 - 08:19:23 -3821
Fall River/Burney 08:04:25 -33.7 Dark Up 41.2 241.5 Up 07:49:25 - 08:19:25 -3886
Susanville 08:04:20 -34.3 Dark Up 41.1 242.7 Up 07:49:20 - 08:19:20 -3920
Gimple 08:04:20 -34.6 Dark Up 41.3 242.7 Up 07:49:20 - 08:19:20 -3947
Greenville 08:04:19 -34.6 Dark Up 41.4 242.7 Up 07:49:19 - 08:19:19 -3948
Portola 08:04:17 -34.9 Dark Up 41.2 243.4 Up 07:49:17 - 08:19:17 -3963
Quincy 08:04:20 -34.8 Dark Up 41.5 242.8 Up 07:49:20 - 08:19:20 -3964
Reno 08:04:14 -35.1 Dark Up 40.9 244.2 Up 07:49:14 - 08:19:14 -3970
Carson City 08:04:12 -35.5 Dark Up 41.0 244.5 Up 07:49:12 - 08:19:12 -3999
Yerington 08:04:09 -35.7 Dark Up 40.7 245.2 Up 07:49:09 - 08:19:09 -4000
Gardnerville 08:04:11 -35.8 Dark Up 41.1 244.7 Up 07:49:11 - 08:19:11 -4017
Hawthorne 08:04:05 -36.1 Dark Up 40.5 246.0 Up 07:49:05 - 08:19:05 -4026
Tonopah 08:03:58 -36.5 Dark Up 39.7 247.6 Up 07:48:58 - 08:18:58 -4031
Lee Vining 08:04:04 -36.7 Dark Up 41.1 246.0 Up 07:49:04 - 08:19:04 -4083
Bishop 08:03:59 -37.3 Dark Up 40.8 247.1 Up 07:48:59 - 08:18:59 -4115
Beatty 08:03:52 -37.6 Dark Up 39.8 248.9 Up 07:48:52 - 08:18:52 -4116
Indian Springs 08:03:47 -37.8 Dark Up 39.1 250.0 Up 07:48:47 - 08:18:47 -4118
Henderson 08:03:42 -38.3 Dark Up 38.8 250.9 Up 07:48:42 - 08:18:42 -4146
Patrick 08:03:35 -38.8 Dark Up 38.1 252.3 Up 07:48:35 - 08:18:35 -4172
Kingman/Dolan Springs 08:03:35 -39.0 Dark Up 38.4 252.3 Up 07:48:35 - 08:18:35 -4195
Laughlin/Bullhead City 08:03:37 -39.1 Dark Up 38.8 251.9 Up 07:48:37 - 08:18:37 -4210
Mohave Valley 08:03:35 -39.4 Dark Up 38.9 252.1 Up 07:48:35 - 08:18:35 -4233
Lake Havasu City 08:03:33 -39.7 Dark Up 38.8 252.6 Up 07:48:33 - 08:18:33 -4260
George/Scottsdale 08:03:21 -40.1 Dark Down 37.1 255.0 Up 07:48:21 - 08:18:21 -4268
Parker 08:03:32 -40.1 Dark Up 38.9 252.9 Up 07:48:32 - 08:18:32 -4290
Idyllwild 08:03:38 -40.8 Dark Up 40.9 251.4 Up 07:48:38 - 08:18:38 -4382
Wildwood 08:03:47 -40.5 Dark Up 42.2 249.6 Up 07:48:47 - 08:18:47 -4397
Calipatria 08:03:32 -41.3 Dark Up 40.2 252.8 Up 07:48:32 - 08:18:32 -4407
Yuma 08:03:27 -41.6 Dark Up 39.6 253.8 Up 07:48:27 - 08:18:27 -4422

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 2022/02/10 00:57:27 UT

Marc W. Buie, Southwest Research Institute

RECON