RECON: TNO occultation with 03YP179

Event between 03YP179 and star GA1040:03299280 with event index number of 2006946

Geocentric closest approach at 2026/02/26 07:38:06 UTC

J2000 position of star is 09:28:51.0 +15:51:28
Equinox of date position of star is 09:30:04.6 +15:45:34
Stellar brightness G=10.5, use SENSEUP=4 with the MallinCam and and exposure time of 125 milli-seconds with the QHY174 camera.
Star is 48 degrees from the moon. Moon is 70% illuminated.
TNO apparent brightness V=23.7

[RECON map]
TNO is 42.7 AU from the Sun and 41.7 AU from the Earth.
The TNO is moving 24.1 km/sec on the sky relative to the star, or, 2.9 arcsec/hr.
The 1-sigma error in the time of the event is 312 seconds.
The 1-sigma cross-track error in the shadow position is 3971 km.
The sky-plane scale is 30274.2 km/arcsec.

The TNO has an absolute magnitude Hv=7.4
Diameter=198.6 km assuming a 5% albedo -- 8.2 sec chord
Diameter=81.1 km assuming a 30% albedo -- 3.4 sec chord
Dynamical classification is CLASSICAL
 
 
 
 
 
 

Star training set for 03YP179, (2026/02/26 07:38UT)
Object            RA         Dec     mag  sep  mel
Regulus        10:09:45.8 +11:50:18  1.3 10.35  58
PPM 126439     09:26:59.3 +16:28:17  6.3  1.08  47
PPM 126542     09:33:05.3 +15:39:13  8.5  0.68  49
PPM 126487     09:29:47.3 +15:59:38  9.9  0.28  48
03YP179        09:30:17.4 +15:44:32 10.5        49
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 2.9 sigma about the mid-time.
The median site spacing is 21.0 km RECON observability=1.0 and success probability=13.5%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Sleaford 07:37:57 -46.4 Dark Up 49.6 214.7 Up 07:22:57 - 07:52:57 1854
Kamloops 07:38:32 -47.4 Dark Up 54.6 193.7 Up 07:23:32 - 07:53:32 1379
Kelowna 07:38:28 -48.3 Dark Up 55.2 195.5 Up 07:23:28 - 07:53:28 1334
Peachland 07:38:28 -48.3 Dark Up 55.4 195.0 Up 07:23:28 - 07:53:28 1317
Summerland 07:38:28 -48.5 Dark Up 55.5 195.2 Up 07:23:28 - 07:53:28 1307
Penticton 07:38:27 -48.6 Dark Up 55.5 195.4 Up 07:23:27 - 07:53:27 1304
Oliver 07:38:27 -48.9 Dark Up 55.9 195.6 Up 07:23:27 - 07:53:27 1274
Anarchist Mountain Observatory 07:38:26 -49.1 Dark Up 56.0 196.0 Up 07:23:26 - 07:53:26 1265
Tonasket 07:38:26 -49.4 Dark Up 56.3 196.0 Up 07:23:26 - 07:53:26 1237
Okanogan 07:38:26 -49.7 Dark Up 56.7 195.9 Up 07:23:26 - 07:53:26 1205
Brewster 07:38:26 -49.9 Dark Up 57.0 195.6 Up 07:23:26 - 07:53:26 1176
Manson/Chelan 07:38:27 -50.1 Dark Up 57.2 195.1 Up 07:23:27 - 07:53:27 1149
Victoria 07:38:37 -48.9 Dark Up 57.1 189.2 Up 07:23:37 - 07:53:37 1123
Wenatchee 07:38:26 -50.5 Dark Up 57.7 195.0 Up 07:23:26 - 07:53:26 1104
Ellensburg 07:38:26 -50.9 Dark Up 58.2 194.7 Up 07:23:26 - 07:53:26 1062
Yakima 07:38:25 -51.3 Dark Up 58.6 194.9 Up 07:23:25 - 07:53:25 1026
PNWRO 07:38:20 -52.1 Dark Up 58.8 198.1 Up 07:23:20 - 07:53:20 1019
Toppenish/White Swan 07:38:25 -51.5 Dark Up 58.7 195.3 Up 07:23:25 - 07:53:25 1012
Goldendale 07:38:25 -52.0 Dark Up 59.3 194.7 Up 07:23:25 - 07:53:25 952
Dunrhomin 07:37:27 -58.0 Dark Up 58.4 226.2 Up 07:22:27 - 07:52:27 929
The Dalles 07:38:26 -52.1 Dark Up 59.6 194.1 Up 07:23:26 - 07:53:26 923
CU-SBO 07:37:27 -58.2 Dark Up 58.6 226.3 Up 07:22:27 - 07:52:27 904
Maupin 07:38:25 -52.6 Dark Up 60.0 194.5 Up 07:23:25 - 07:53:25 888
Sisters 07:38:25 -53.3 Dark Up 61.0 193.9 Up 07:23:25 - 07:53:25 797
Bend 07:38:24 -53.6 Dark Up 61.1 194.6 Up 07:23:24 - 07:53:24 782
Oregon Observatory 07:38:24 -53.7 Dark Up 61.3 194.4 Up 07:23:24 - 07:53:24 763
North Lake 07:38:21 -54.4 Dark Up 61.8 195.7 Up 07:23:21 - 07:53:21 720
Lakeview 07:38:18 -55.6 Dark Up 62.7 197.4 Up 07:23:18 - 07:53:18 639
Chiloquin 07:38:23 -54.9 Dark Up 62.7 194.1 Up 07:23:23 - 07:53:23 632
Klamath Falls 07:38:22 -55.2 Dark Up 63.0 194.5 Up 07:23:22 - 07:53:22 603
Cedarville 07:38:16 -56.2 Dark Up 63.3 198.1 Up 07:23:16 - 07:53:16 584
Fall River/Burney 07:38:19 -56.4 Dark Up 64.1 195.9 Up 07:23:19 - 07:53:19 504
Susanville 07:38:16 -57.2 Dark Up 64.5 197.8 Up 07:23:16 - 07:53:16 467
Gimple 07:38:16 -57.4 Dark Up 64.8 197.5 Up 07:23:16 - 07:53:16 435
Greenville 07:38:16 -57.4 Dark Up 64.8 197.4 Up 07:23:16 - 07:53:16 433
Portola 07:38:14 -57.8 Dark Up 65.0 198.6 Up 07:23:14 - 07:53:14 416
Quincy 07:38:16 -57.6 Dark Up 65.0 197.5 Up 07:23:16 - 07:53:16 414
Reno 07:38:11 -58.2 Dark Up 65.1 200.2 Up 07:23:11 - 07:53:11 410
Yerington 07:38:08 -58.9 Dark Up 65.5 202.1 Up 07:23:08 - 07:53:08 378
Carson City 07:38:11 -58.6 Dark Up 65.5 200.5 Up 07:23:11 - 07:53:11 377
Gardnerville 07:38:10 -58.8 Dark Up 65.7 200.8 Up 07:23:10 - 07:53:10 356
Hawthorne 07:38:06 -59.4 Dark Up 65.7 203.6 Up 07:23:06 - 07:53:06 350
Tonopah 07:38:01 -60.1 Dark Up 65.7 207.1 Up 07:23:01 - 07:53:01 349
Lee Vining 07:38:07 -59.9 Dark Up 66.4 203.0 Up 07:23:07 - 07:53:07 282
Indian Springs 07:37:53 -61.8 Dark Up 66.4 212.0 Up 07:22:53 - 07:52:53 258
Beatty 07:37:57 -61.3 Dark Up 66.5 209.3 Up 07:22:57 - 07:52:57 255
Bishop 07:38:03 -60.6 Dark Up 66.7 205.2 Up 07:23:03 - 07:53:03 248
Henderson 07:37:49 -62.4 Dark Up 66.5 214.1 Up 07:22:49 - 07:52:49 230
Patrick 07:37:45 -63.2 Dark Up 66.5 217.3 Up 07:22:45 - 07:52:45 207
Kingman/Dolan Springs 07:37:45 -63.4 Dark Up 66.8 217.2 Up 07:22:45 - 07:52:45 180
Laughlin/Bullhead City 07:37:46 -63.3 Dark Up 67.1 216.2 Up 07:22:46 - 07:52:46 160
Mohave Valley 07:37:46 -63.6 Dark Up 67.3 216.5 Up 07:22:46 - 07:52:46 135
George/Scottsdale 07:37:34 -65.0 Dark Up 66.8 223.8 Up 07:22:34 - 07:52:34 114
Lake Havasu City 07:37:44 -64.0 Dark Up 67.5 217.7 Up 07:22:44 - 07:52:44 105
Parker 07:37:43 -64.4 Dark Up 67.7 218.2 Up 07:22:43 - 07:52:43 72
Idyllwild 07:37:51 -64.4 Dark Up 69.2 213.4 Up 07:22:51 - 07:52:51 -46
Calipatria 07:37:46 -65.2 Dark Up 69.2 217.1 Up 07:22:46 - 07:52:46 -66
Wildwood 07:37:58 -63.7 Dark Up 69.7 208.4 Up 07:22:58 - 07:52:58 -72
Yuma 07:37:42 -65.8 Dark Up 69.1 219.8 Up 07:22:42 - 07:52:42 -78

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 03YP179, (2026/02/26 07:38UT)
Object            RA         Dec     mag  sep  mel
Regulus        10:08:21.9 +11:58:02  1.3 10.35  58
PPM 126439     09:25:32.4 +16:35:07  6.3  1.08  47
PPM 126542     09:31:39.0 +15:46:12  8.5  0.68  49
PPM 126487     09:28:20.8 +16:06:33  9.9  0.28  48
03YP179        09:28:51.0 +15:51:28 10.5        48
Positions are for J2000

Event circumstances last updated at 2022/04/13 23:13:51 UT

Marc W. Buie, Southwest Research Institute

RECON