RECON: TNO occultation with 500877

Event between (500877) 13JE64 and star GA0700:08605483 with event index number of 2332505

Geocentric closest approach at 2026/07/11 06:45:07 UTC

J2000 position of star is 17:12:44.4 -19:00:57
Equinox of date position of star is 17:14:10.7 -19:02:36
Stellar brightness G=16.3, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 163 degrees from the moon. Moon is 14% illuminated.
Apparent brightness V=24.2

[RECON map]
Object is 38.9 AU from the Sun and 38.0 AU from the Earth.
Apparent velocity is 20.4 km/sec on the sky relative to the star, or, 2.7 arcsec/hr.
The 1-sigma error in the time of the event is 523 seconds.
The 1-sigma cross-track error in the shadow position is 2825 km.
The sky-plane scale is 27555.6 km/arcsec.

The object has an absolute magnitude Hv=8.3
Diameter=138.0 km assuming a 5% albedo -- 6.4 sec chord
Diameter=56.4 km assuming a 30% albedo -- 2.6 sec chord
Dynamical classification is 2:1E
 
 
 
 
 
 

Star training set for 500877, (2026/07/11 06:45UT)
Object            RA         Dec     mag  sep  mel
Antares        16:31:02.3 -26:29:19  0.9 12.43 175
35Eta Oph      17:11:54.1 -15:45:21  2.6  3.34 162
PPM 232651     17:09:47.4 -17:38:31  6.0  1.76 164
PPM 232790     17:15:10.5 -18:33:57  8.5  0.52 163
PPM 232748     17:13:51.5 -18:56:10  9.4  0.15 163
500877         17:14:17.9 -19:02:44 16.3       163
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 1.7 sigma about the mid-time.
The median site spacing is 17.5 km RECON observability=1.0 and success probability=0.6%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Kamloops 06:44:27 -15.0 AT Down 19.5 191.8 Really Low 06:29:27 - 06:59:27 8983
Kelowna 06:44:24 -15.9 AT Down 20.2 192.7 Low 06:29:24 - 06:59:24 8946
Peachland 06:44:24 -16.0 AT Down 20.4 192.5 Low 06:29:24 - 06:59:24 8943
Summerland 06:44:24 -16.1 AT Down 20.5 192.6 Low 06:29:24 - 06:59:24 8936
Sleaford 06:43:44 -15.6 AT Down 15.4 205.5 Really Low 06:28:44 - 06:58:44 8933
Penticton 06:44:24 -16.2 AT Down 20.5 192.7 Low 06:29:24 - 06:59:24 8933
Oliver 06:44:23 -16.6 AT Down 20.9 192.7 Low 06:29:23 - 06:59:23 8918
Anarchist Mountain Observatory 06:44:22 -16.8 AT Down 21.0 192.9 Low 06:29:22 - 06:59:22 8911
Victoria 06:44:36 -16.3 AT Down 22.0 188.9 Low 06:29:36 - 06:59:36 8907
Okanogan 06:44:23 -17.3 AT Down 21.7 192.7 Low 06:29:23 - 06:59:23 8883
Brewster 06:44:23 -17.5 AT Down 22.0 192.6 Low 06:29:23 - 06:59:23 8873
Manson/Chelan 06:44:24 -17.7 AT Down 22.2 192.2 Low 06:29:24 - 06:59:24 8865
Wenatchee 06:44:25 -18.1 Dark Down 22.7 192.1 Low 06:29:25 - 06:59:25 8845
Ellensburg 06:44:25 -18.4 Dark Down 23.2 191.9 Low 06:29:25 - 06:59:25 8828
Yakima 06:44:24 -18.8 Dark Down 23.6 191.9 Low 06:29:24 - 06:59:24 8809
Toppenish/White Swan 06:44:24 -19.0 Dark Down 23.8 192.1 Low 06:29:24 - 06:59:24 8798
PNWRO 06:44:19 -19.7 Dark Down 23.9 193.7 Low 06:29:19 - 06:59:19 8773
The Dalles 06:44:26 -19.6 Dark Down 24.6 191.4 Low 06:29:26 - 06:59:26 8765
Maupin 06:44:26 -20.0 Dark Down 25.0 191.5 Low 06:29:26 - 06:59:26 8744
Sisters 06:44:27 -20.7 Dark Down 26.0 191.1 Low 06:29:27 - 06:59:27 8703
Bend 06:44:25 -21.0 Dark Down 26.2 191.4 Low 06:29:25 - 06:59:25 8690
Oregon Observatory 06:44:26 -21.1 Dark Down 26.3 191.3 Low 06:29:26 - 06:59:26 8682
Chiloquin 06:44:28 -22.2 Dark Down 27.7 191.0 Low 06:29:28 - 06:59:28 8616
Klamath Falls 06:44:26 -22.5 Dark Down 28.0 191.1 Low 06:29:26 - 06:59:26 8597
Cedarville 06:44:19 -23.6 Dark Down 28.5 192.8 Low 06:29:19 - 06:59:19 8551
Fall River/Burney 06:44:24 -23.7 Dark Down 29.1 191.6 Low 06:29:24 - 06:59:24 8530
Greenville 06:44:22 -24.7 Dark Down 29.9 192.2 Low 06:29:22 - 06:59:22 8477
Gimple 06:44:21 -24.7 Dark Down 29.9 192.3 Low 06:29:21 - 06:59:21 8476
Quincy 06:44:22 -24.9 Dark Down 30.1 192.2 Up 06:29:22 - 06:59:22 8465
Portola 06:44:19 -25.1 Dark Down 30.2 192.7 Up 06:29:19 - 06:59:19 8455
Reno 06:44:17 -25.6 Dark Down 30.3 193.5 Up 06:29:17 - 06:59:17 8436
Carson City 06:44:17 -25.9 Dark Down 30.7 193.5 Up 06:29:17 - 06:59:17 8415
Gardnerville 06:44:16 -26.1 Dark Down 30.9 193.6 Up 06:29:16 - 06:59:16 8400
Yerington 06:44:14 -26.3 Dark Down 30.7 194.2 Up 06:29:14 - 06:59:14 8400
Hawthorne 06:44:11 -26.8 Dark Down 31.1 194.9 Up 06:29:11 - 06:59:11 8368
Dunrhomin 06:43:21 -27.4 Dark Down 25.7 208.1 Low 06:28:21 - 06:58:21 8344
Lee Vining 06:44:14 -27.2 Dark Down 31.7 194.4 Up 06:29:14 - 06:59:14 8338
Nikitin 06:43:21 -27.6 Dark Down 25.9 208.1 Low 06:28:21 - 06:58:21 8333
CU-SBO 06:43:21 -27.7 Dark Down 26.0 208.1 Low 06:28:21 - 06:58:21 8331
Bishop 06:44:09 -28.0 Dark Down 32.2 195.3 Up 06:29:09 - 06:59:09 8296
Beatty 06:44:03 -28.8 Dark Down 32.3 197.1 Up 06:29:03 - 06:59:03 8255
Patrick 06:43:50 -30.9 Dark Down 32.9 200.5 Up 06:28:50 - 06:58:50 8135
Laughlin/Bullhead City 06:43:53 -31.0 Dark Down 33.4 199.8 Up 06:28:53 - 06:58:53 8125
Wildwood 06:44:09 -31.0 Dark Down 35.4 195.6 Up 06:29:09 - 06:59:09 8086
Lake Havasu City 06:43:51 -31.7 Dark Down 33.9 200.2 Up 06:28:51 - 06:58:51 8078
Idyllwild 06:44:01 -31.9 Dark Down 35.3 197.8 Up 06:29:01 - 06:59:01 8048
George/Scottsdale 06:43:39 -33.0 Dark Down 33.9 203.0 Up 06:28:39 - 06:58:39 8002
Calipatria 06:43:54 -32.7 Dark Down 35.5 199.2 Up 06:28:54 - 06:58:54 7996
Yuma 06:43:50 -33.4 Dark Down 35.7 200.3 Up 06:28:50 - 06:58:50 7958

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 500877, (2026/07/11 06:45UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9 12.43 175
35Eta Oph      17:10:22.7 -15:43:29  2.6  3.34 162
PPM 232651     17:08:14.9 -17:36:33  6.0  1.76 164
PPM 232790     17:13:37.2 -18:32:11  8.5  0.52 163
PPM 232748     17:12:18.0 -18:54:22  9.4  0.15 163
500877         17:12:44.4 -19:00:57 16.3       163
Positions are for J2000

Event circumstances last updated at 2024/06/19 21:31:49 UT

Marc W. Buie, Southwest Research Institute

RECON