RECON: TNO occultation with 69987

Event between (69987) 98WA25 and star GA1120:01465451 with event index number of 1629142

Geocentric closest approach at 2026/11/12 09:56:33 UTC

J2000 position of star is 05:47:40.2 +22:35:30
Equinox of date position of star is 05:49:03.6 +22:35:53
Stellar brightness G=16.9, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 174 degrees from the moon. Moon is 9% illuminated.
Apparent brightness V=23.4

[RECON map]
Object is 42.6 AU from the Sun and 41.8 AU from the Earth.
Apparent velocity is 19.6 km/sec on the sky relative to the star, or, 2.3 arcsec/hr.
The 1-sigma error in the time of the event is 564 seconds.
The 1-sigma cross-track error in the shadow position is 2053 km.
The sky-plane scale is 30311.0 km/arcsec.

The object has an absolute magnitude Hv=7.1
Diameter=229.1 km assuming a 5% albedo -- 11.8 sec chord
Diameter=93.5 km assuming a 30% albedo -- 4.8 sec chord
Dynamical classification is CLASSICAL
 
 
 
 
 
 

Star training set for 69987, (2026/11/12 10:13UT)
Object            RA         Dec     mag  sep  mel
Betelgeuse     05:56:37.6 +07:24:35  0.4 15.29 159
Alnath         05:27:59.5 +28:37:40  1.6  7.70 177
PPM 094739     05:44:57.5 +23:12:53  5.9  1.17 175
PPM 094731     05:44:39.6 +22:41:10  8.5  1.07 175
PPM 094869     05:48:52.5 +22:32:12  8.7  0.12 174
PPM 094890     05:49:38.8 +22:31:05 10.2  0.11 174
69987          05:49:17.7 +22:35:57 16.9       174
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 1.6 sigma about the mid-time.
The median site spacing is 36.2 km RECON observability=1.0 and success probability=14.6%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Sleaford 09:56:02 -39.7 Dark Down 59.9 194.3 Up 09:41:02 - 10:11:02 -2290
Kamloops 09:56:53 -48.0 Dark Down 61.5 167.3 Up 09:41:53 - 10:11:53 -2400
Kelowna 09:56:50 -48.1 Dark Down 62.4 168.7 Up 09:41:50 - 10:11:50 -2485
Peachland 09:56:51 -48.3 Dark Down 62.4 168.1 Up 09:41:51 - 10:11:51 -2494
Summerland 09:56:51 -48.3 Dark Down 62.6 168.2 Up 09:41:51 - 10:11:51 -2509
Penticton 09:56:50 -48.3 Dark Down 62.7 168.4 Up 09:41:50 - 10:11:50 -2516
Oliver 09:56:51 -48.5 Dark Down 63.0 168.3 Up 09:41:51 - 10:11:51 -2551
Anarchist Mountain Observatory 09:56:50 -48.5 Dark Down 63.2 168.6 Up 09:41:50 - 10:11:50 -2569
Victoria 09:57:05 -50.9 Dark Down 63.0 160.4 Up 09:42:05 - 10:12:05 -2594
Okanogan 09:56:51 -49.0 Dark Down 63.8 167.9 Up 09:41:51 - 10:11:51 -2632
Brewster 09:56:52 -49.3 Dark Down 64.1 167.4 Up 09:41:52 - 10:11:52 -2658
Manson/Chelan 09:56:54 -49.6 Dark Down 64.2 166.5 Up 09:41:54 - 10:11:54 -2677
Wenatchee 09:56:55 -50.0 Dark Down 64.6 165.9 Up 09:41:55 - 10:11:55 -2724
Ellensburg 09:56:56 -50.3 Dark Down 65.0 165.3 Up 09:41:56 - 10:11:56 -2764
Yakima 09:56:56 -50.6 Dark Down 65.4 165.0 Up 09:41:56 - 10:11:56 -2805
Toppenish/White Swan 09:56:56 -50.6 Dark Down 65.6 165.2 Up 09:41:56 - 10:11:56 -2828
PNWRO 09:56:50 -50.0 Dark Down 66.2 168.4 Up 09:41:50 - 10:11:50 -2873
The Dalles 09:56:59 -51.5 Dark Down 66.2 163.0 Up 09:41:59 - 10:11:59 -2902
Maupin 09:56:59 -51.7 Dark Down 66.7 163.0 Up 09:41:59 - 10:11:59 -2945
Sisters 09:57:02 -52.5 Dark Down 67.4 161.3 Up 09:42:02 - 10:12:02 -3032
Bend 09:57:00 -52.5 Dark Down 67.7 161.7 Up 09:42:00 - 10:12:00 -3058
Oregon Observatory 09:57:01 -52.6 Dark Down 67.8 161.2 Up 09:42:01 - 10:12:01 -3075
Chiloquin 09:57:04 -53.6 Dark Down 69.0 159.1 Up 09:42:04 - 10:12:04 -3209
Klamath Falls 09:57:04 -53.8 Dark Down 69.3 159.0 Up 09:42:04 - 10:12:04 -3245
Cedarville 09:56:58 -53.1 Dark Down 70.3 162.5 Up 09:41:58 - 10:11:58 -3328
Fall River/Burney 09:57:03 -54.1 Dark Down 70.5 158.8 Up 09:42:03 - 10:12:03 -3370
Greenville 09:57:02 -54.3 Dark Down 71.5 159.1 Up 09:42:02 - 10:12:02 -3469
Gimple 09:57:01 -54.3 Dark Down 71.5 159.3 Up 09:42:01 - 10:12:01 -3469
Quincy 09:57:02 -54.4 Dark Down 71.7 158.9 Up 09:42:02 - 10:12:02 -3490
Dunrhomin 09:55:54 -43.3 Dark Down 70.9 204.5 Up 09:40:54 - 10:10:54 -3492
Portola 09:57:00 -54.1 Dark Down 71.9 160.1 Up 09:42:00 - 10:12:00 -3506
Nikitin 09:55:54 -43.3 Dark Down 71.1 204.7 Up 09:40:54 - 10:10:54 -3511
CU-SBO 09:55:55 -43.4 Dark Down 71.2 204.6 Up 09:40:55 - 10:10:55 -3518
Reno 09:56:57 -53.8 Dark Down 72.3 161.6 Up 09:41:57 - 10:11:57 -3538
Carson City 09:56:58 -54.0 Dark Down 72.7 161.4 Up 09:41:58 - 10:11:58 -3577
Yerington 09:56:55 -53.6 Dark Down 73.0 163.0 Up 09:41:55 - 10:11:55 -3601
Gardnerville 09:56:57 -54.1 Dark Down 72.9 161.2 Up 09:41:57 - 10:11:57 -3603
Hawthorne 09:56:53 -53.5 Dark Down 73.5 164.2 Up 09:41:53 - 10:11:53 -3653
Lee Vining 09:56:55 -54.0 Dark Down 74.0 162.1 Up 09:41:55 - 10:11:55 -3711
Bishop 09:56:52 -53.8 Dark Down 74.7 163.9 Up 09:41:52 - 10:11:52 -3779
Beatty 09:56:46 -52.8 Dark Down 75.5 169.1 Up 09:41:46 - 10:11:46 -3837
Patrick 09:56:32 -51.1 Dark Down 77.2 179.6 Up 09:41:32 - 10:11:32 -4008
Laughlin/Bullhead City 09:56:36 -51.7 Dark Down 77.4 176.6 Up 09:41:36 - 10:11:36 -4032
Lake Havasu City 09:56:35 -51.7 Dark Down 78.1 177.6 Up 09:41:35 - 10:11:35 -4106
Wildwood 09:56:55 -55.1 Dark Down 77.8 158.9 Up 09:41:55 - 10:11:55 -4130
Idyllwild 09:56:46 -53.7 Dark Down 78.6 166.4 Up 09:41:46 - 10:11:46 -4179
George/Scottsdale 09:56:23 -49.9 Dark Down 78.8 188.9 Up 09:41:23 - 10:11:23 -4196
Calipatria 09:56:40 -53.0 Dark Down 79.4 171.3 Up 09:41:40 - 10:11:40 -4250
Yuma 09:56:36 -52.4 Dark Down 79.9 175.6 Up 09:41:36 - 10:11:36 -4301

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 69987, (2026/11/12 10:13UT)
Object            RA         Dec     mag  sep  mel
Betelgeuse     05:55:10.3 +07:24:26  0.4 15.29 159
Alnath         05:26:17.6 +28:36:23  1.6  7.70 177
PPM 094739     05:43:19.5 +23:12:15  5.9  1.17 175
PPM 094731     05:43:02.0 +22:40:32  8.5  1.07 175
PPM 094869     05:47:15.0 +22:31:44  8.7  0.12 174
PPM 094890     05:48:01.4 +22:30:38 10.2  0.11 174
69987          05:47:40.2 +22:35:30 16.9       174
Positions are for J2000

Event circumstances last updated at 2022/12/25 03:53:45 UT

Marc W. Buie, Southwest Research Institute

RECON