RECON: TNO occultation with 508869

Event between (508869) 02VT130 and star GA1140:01578035 with event index number of 1494392

Geocentric closest approach at 2026/02/19 07:02:40 UTC

J2000 position of star is 05:52:22.3 +24:29:39
Equinox of date position of star is 05:53:47.3 +24:29:53
Stellar brightness G=15.4, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 95 degrees from the moon. Moon is 4% illuminated.
Apparent brightness V=22.3

[RECON map]
Object is 43.3 AU from the Sun and 42.8 AU from the Earth.
Apparent velocity is 10.0 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 478 seconds.
The 1-sigma cross-track error in the shadow position is 1861 km.
The sky-plane scale is 31069.2 km/arcsec.

The object has an absolute magnitude Hv=5.8
Diameter=436.5 km assuming a 5% albedo -- 40.8 sec chord
Diameter=178.2 km assuming a 30% albedo -- 16.7 sec chord
Dynamical classification is CLASSICAL
 
 
 
 
 
 

Star training set for 508869, (2026/02/19 07:11UT)
Object            RA         Dec     mag  sep  mel
Betelgeuse     05:56:35.3 +07:24:35  0.4 17.10  96
Alnath         05:27:56.8 +28:37:38  1.6  7.13  90
132 Tau        05:50:37.3 +24:34:26  4.9  0.77  95
PPM 095035     05:55:09.7 +24:17:26  8.1  0.34  96
PPM 094995     05:53:48.4 +24:24:01 10.4  0.11  95
508869         05:53:58.6 +24:29:54 15.4        96
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 1.9 sigma about the mid-time.
The median site spacing is 28.0 km RECON observability=1.0 and success probability=4.5%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Sleaford 06:56:33 -48.9 Dark Down 37.7 261.9 Up 06:41:33 - 07:11:33 6338
Kamloops 06:57:30 -47.5 Dark Down 46.7 250.1 Up 06:42:30 - 07:12:30 5929
Kelowna 06:57:21 -48.5 Dark Down 46.4 251.8 Up 06:42:21 - 07:12:21 5869
Peachland 06:57:21 -48.5 Dark Down 46.6 251.6 Up 06:42:21 - 07:12:21 5853
Summerland 06:57:20 -48.6 Dark Down 46.6 251.8 Up 06:42:20 - 07:12:20 5841
Penticton 06:57:20 -48.7 Dark Down 46.6 252.0 Up 06:42:20 - 07:12:20 5836
Oliver 06:57:15 -49.0 Dark Down 46.7 252.3 Up 06:42:15 - 07:12:15 5803
Anarchist Mountain Observatory 06:57:17 -49.2 Dark Down 46.6 252.7 Up 06:42:17 - 07:12:17 5790
Okanogan 06:57:14 -49.7 Dark Down 47.0 253.1 Up 06:42:14 - 07:12:14 5725
Brewster 06:57:13 -49.9 Dark Down 47.2 253.2 Up 06:42:13 - 07:12:13 5695
Victoria 06:57:35 -48.3 Dark Down 49.3 249.3 Up 06:42:35 - 07:12:35 5673
Manson/Chelan 06:57:13 -49.9 Dark Down 47.5 253.1 Up 06:42:13 - 07:12:13 5669
Wenatchee 06:57:13 -50.3 Dark Down 47.7 253.4 Up 06:42:13 - 07:12:13 5620
Ellensburg 06:57:11 -50.6 Dark Down 48.0 253.6 Up 06:42:11 - 07:12:11 5576
Yakima 06:57:10 -50.9 Dark Down 48.1 254.0 Up 06:42:10 - 07:12:10 5536
Toppenish/White Swan 06:57:07 -51.2 Dark Down 48.1 254.4 Up 06:42:07 - 07:12:07 5518
PNWRO 06:56:58 -52.0 Dark Down 47.2 256.2 Up 06:41:58 - 07:11:58 5511
The Dalles 06:57:09 -51.5 Dark Down 48.8 254.5 Up 06:42:09 - 07:12:09 5427
Maupin 06:57:05 -51.9 Dark Down 48.8 255.1 Up 06:42:05 - 07:12:05 5388
Sisters 06:57:05 -52.4 Dark Down 49.4 255.6 Up 06:42:05 - 07:12:05 5292
Bend 06:57:02 -52.7 Dark Down 49.3 256.1 Up 06:42:02 - 07:12:02 5273
Dunrhomin 06:55:17 -60.7 Dark Down 38.1 271.5 Up 06:40:17 - 07:10:17 5272
Oregon Observatory 06:57:02 -52.8 Dark Down 49.4 256.2 Up 06:42:02 - 07:12:02 5254
Nikitin 06:55:17 -60.9 Dark Down 38.1 271.6 Up 06:40:17 - 07:10:17 5253
CU-SBO 06:55:16 -60.9 Dark Down 38.2 271.6 Up 06:40:16 - 07:10:16 5245
Chiloquin 06:56:58 -53.7 Dark Down 50.0 257.3 Up 06:41:58 - 07:11:58 5114
Klamath Falls 06:56:57 -54.0 Dark Down 50.0 257.8 Up 06:41:57 - 07:11:57 5081
Cedarville 06:56:43 -55.3 Dark Down 49.0 259.9 Up 06:41:43 - 07:11:43 5043
Fall River/Burney 06:56:49 -55.1 Dark Down 50.0 259.5 Up 06:41:49 - 07:11:49 4969
Gimple 06:56:42 -56.1 Dark Down 49.8 260.9 Up 06:41:42 - 07:11:42 4887
Greenville 06:56:42 -56.0 Dark Down 49.9 260.9 Up 06:41:42 - 07:11:42 4886
Quincy 06:56:42 -56.2 Dark Down 49.9 261.1 Up 06:41:42 - 07:11:42 4865
Portola 06:56:38 -56.5 Dark Down 49.6 261.6 Up 06:41:38 - 07:11:38 4862
Reno 06:56:33 -57.0 Dark Down 49.1 262.4 Up 06:41:33 - 07:11:33 4849
Carson City 06:56:31 -57.3 Dark Down 49.2 262.8 Up 06:41:31 - 07:11:31 4812
Yerington 06:56:26 -57.7 Dark Down 48.7 263.5 Up 06:41:26 - 07:11:26 4806
Gardnerville 06:56:30 -57.5 Dark Down 49.2 263.1 Up 06:41:30 - 07:11:30 4788
Hawthorne 06:56:22 -58.4 Dark Down 48.4 264.4 Up 06:41:22 - 07:11:22 4770
Lee Vining 06:56:22 -58.6 Dark Down 48.8 264.7 Up 06:41:22 - 07:11:22 4701
Bishop 06:56:15 -59.4 Dark Down 48.3 265.8 Up 06:41:15 - 07:11:15 4656
Beatty 06:56:03 -60.5 Dark Down 47.1 267.4 Up 06:41:03 - 07:11:03 4645
Patrick 06:55:39 -63.0 Dark Down 44.8 270.6 Up 06:40:39 - 07:10:39 4562
Laughlin/Bullhead City 06:55:43 -62.9 Dark Down 45.4 270.5 Up 06:40:43 - 07:10:43 4519
Lake Havasu City 06:55:39 -63.5 Dark Down 45.2 271.3 Up 06:40:39 - 07:10:39 4456
George/Scottsdale 06:55:21 -65.2 Dark Down 43.2 273.3 Up 06:40:21 - 07:10:21 4439
Idyllwild 06:55:49 -63.1 Dark Down 47.1 270.8 Up 06:40:49 - 07:10:49 4319
Wildwood 06:56:05 -61.8 Dark Down 48.6 269.4 Up 06:41:05 - 07:11:05 4312
Calipatria 06:55:41 -64.1 Dark Down 46.1 272.0 Up 06:40:41 - 07:10:41 4284
Yuma 06:55:33 -64.9 Dark Down 45.4 272.9 Up 06:40:33 - 07:10:33 4261

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 508869, (2026/02/19 07:11UT)
Object            RA         Dec     mag  sep  mel
Betelgeuse     05:55:10.3 +07:24:26  0.4 17.10  96
Alnath         05:26:17.6 +28:36:23  1.6  7.13  90
132 Tau        05:49:00.9 +24:34:02  4.9  0.77  95
PPM 095035     05:53:33.6 +24:17:13  8.1  0.34  96
PPM 094995     05:52:12.2 +24:23:45 10.4  0.11  95
508869         05:52:22.3 +24:29:39 15.4        95
Positions are for J2000

Event circumstances last updated at 2023/01/26 02:45:27 UT

Marc W. Buie, Southwest Research Institute

RECON