RECON: TNO occultation with 601690

Event between (601690) 13KZ18 and star GA1300:00190093 with event index number of 2733151

Geocentric closest approach at 2026/02/16 06:03:37 UTC

J2000 position of star is 00:38:57.6 +41:27:48
Equinox of date position of star is 00:40:15.2 +41:35:36
Stellar brightness G=14.6, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 79 degrees from the moon. Moon is 2% illuminated.
Apparent brightness V=22.4

[RECON map]
Object is 21.2 AU from the Sun and 21.6 AU from the Earth.
Apparent velocity is 25.8 km/sec on the sky relative to the star, or, 5.9 arcsec/hr.
The 1-sigma error in the time of the event is 59 seconds.
The 1-sigma cross-track error in the shadow position is 1341 km.
The sky-plane scale is 15639.5 km/arcsec.

The object has an absolute magnitude Hv=8.9
Diameter=100.5 km assuming a 5% albedo -- 4.0 sec chord
Diameter=41.0 km assuming a 30% albedo -- 1.6 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 

Star training set for 601690, (2026/02/16 06:02UT)
Object            RA         Dec     mag  sep  mel
Deneb          20:42:19.4 +45:22:29  1.3 42.35  65
57Gam1And      02:05:30.9 +42:27:14  2.3 15.79  93
32 And         00:42:32.8 +39:36:06  5.3  2.05  78
PPM 043212     00:43:27.3 +40:49:51  7.6  0.97  79
PPM 043130     00:38:59.4 +41:33:42  9.6  0.27  78
PPM 043141     00:39:32.2 +41:32:03 10.2  0.17  78
601690         00:40:23.3 +41:36:24 14.6        79
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 5.0 sigma about the mid-time.
The median site spacing is 3.7 km RECON observability=0.2 and success probability=0.0%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Sleaford 06:05:35 -47.7 Dark Down 16.2 318.6 Really Low 06:00:11 - 06:10:59 8047
Dunrhomin 06:06:05 -58.2 Dark Down 6.7 320.7 Really Low 06:00:41 - 06:11:29 7779
Nikitin 06:06:05 -58.4 Dark Down 6.6 320.7 Really Low 06:00:41 - 06:11:29 7772
CU-SBO 06:06:06 -58.4 Dark Down 6.6 320.6 Really Low 06:00:42 - 06:11:30 7766
Kelowna 06:05:58 -44.4 Dark Down 20.6 310.6 Low 06:00:34 - 06:11:22 7445
Kamloops 06:05:56 -43.5 Dark Down 21.6 309.8 Low 06:00:32 - 06:11:20 7432
Penticton 06:05:59 -44.6 Dark Down 20.5 310.6 Low 06:00:35 - 06:11:23 7431
Peachland 06:05:59 -44.4 Dark Down 20.7 310.5 Low 06:00:35 - 06:11:23 7429
Summerland 06:05:59 -44.5 Dark Down 20.6 310.6 Low 06:00:35 - 06:11:23 7428
Anarchist Mountain Observatory 06:06:00 -45.1 Dark Down 20.0 310.9 Low 06:00:36 - 06:11:24 7423
Oliver 06:06:00 -44.9 Dark Down 20.2 310.7 Low 06:00:36 - 06:11:24 7420
Okanogan 06:06:03 -45.4 Dark Down 19.7 311.0 Really Low 06:00:39 - 06:11:27 7392
Brewster 06:06:04 -45.5 Dark Down 19.6 310.9 Really Low 06:00:40 - 06:11:28 7373
Manson/Chelan 06:06:05 -45.5 Dark Down 19.7 310.8 Really Low 06:00:41 - 06:11:29 7349
PNWRO 06:06:09 -47.4 Dark Down 17.8 312.0 Really Low 06:00:45 - 06:11:33 7342
Wenatchee 06:06:06 -45.7 Dark Down 19.5 310.8 Really Low 06:00:42 - 06:11:30 7325
Ellensburg 06:06:08 -45.9 Dark Down 19.3 310.8 Really Low 06:00:44 - 06:11:32 7300
Yakima 06:06:09 -46.1 Dark Down 19.0 310.9 Really Low 06:00:45 - 06:11:33 7284
Toppenish/White Swan 06:06:10 -46.4 Dark Down 18.8 311.0 Really Low 06:00:46 - 06:11:34 7284
Victoria 06:06:06 -43.4 Dark Down 21.8 308.7 Low 06:00:42 - 06:11:30 7221
The Dalles 06:06:13 -46.5 Dark Down 18.7 310.8 Really Low 06:00:49 - 06:11:37 7216
Maupin 06:06:14 -46.8 Dark Down 18.4 311.0 Really Low 06:00:50 - 06:11:38 7205
George/Scottsdale 06:06:31 -59.6 Dark Down 5.2 317.6 Really Low 06:01:07 - 06:11:55 7182
Patrick 06:06:31 -57.2 Dark Down 7.6 316.4 Really Low 06:01:07 - 06:11:55 7156
Bend 06:06:17 -47.3 Dark Down 17.8 311.1 Really Low 06:00:53 - 06:11:41 7150
Sisters 06:06:17 -47.1 Dark Down 18.1 310.9 Really Low 06:00:53 - 06:11:41 7146
Oregon Observatory 06:06:18 -47.4 Dark Down 17.7 311.1 Really Low 06:00:54 - 06:11:42 7136
Laughlin/Bullhead City 06:06:32 -56.9 Dark Down 7.8 316.1 Really Low 06:01:08 - 06:11:56 7106
Cedarville 06:06:24 -49.6 Dark Down 15.4 312.3 Really Low 06:01:00 - 06:11:48 7101
Lake Havasu City 06:06:34 -57.5 Dark Down 7.2 316.3 Really Low 06:01:10 - 06:11:58 7087
Beatty 06:06:32 -54.5 Dark Down 10.3 314.8 Really Low 06:01:08 - 06:11:56 7072
Chiloquin 06:06:22 -47.9 Dark Down 17.1 311.2 Really Low 06:00:58 - 06:11:46 7060
Klamath Falls 06:06:23 -48.2 Dark Down 16.8 311.3 Really Low 06:00:59 - 06:11:47 7049
Hawthorne 06:06:30 -52.3 Dark Down 12.5 313.7 Really Low 06:01:06 - 06:11:54 7048
Yerington 06:06:29 -51.7 Dark Down 13.1 313.3 Really Low 06:01:05 - 06:11:53 7041
Reno 06:06:28 -51.0 Dark Down 13.9 312.9 Really Low 06:01:04 - 06:11:52 7032
Carson City 06:06:29 -51.2 Dark Down 13.6 313.0 Really Low 06:01:05 - 06:11:53 7016
Fall River/Burney 06:06:26 -49.1 Dark Down 15.8 311.8 Really Low 06:01:02 - 06:11:50 7016
Portola 06:06:29 -50.4 Dark Down 14.4 312.5 Really Low 06:01:05 - 06:11:53 7010
Gardnerville 06:06:30 -51.4 Dark Down 13.4 313.0 Really Low 06:01:06 - 06:11:54 7008
Bishop 06:06:32 -53.1 Dark Down 11.6 314.0 Really Low 06:01:08 - 06:11:56 7006
Gimple 06:06:28 -50.0 Dark Down 14.9 312.2 Really Low 06:01:04 - 06:11:52 7003
Greenville 06:06:28 -49.9 Dark Down 14.9 312.2 Really Low 06:01:04 - 06:11:52 6999
Lee Vining 06:06:32 -52.3 Dark Down 12.4 313.5 Really Low 06:01:08 - 06:11:56 6996
Quincy 06:06:29 -50.0 Dark Down 14.8 312.2 Really Low 06:01:05 - 06:11:53 6990
Yuma 06:06:38 -58.3 Dark Down 6.1 316.3 Really Low 06:01:14 - 06:12:02 6981
Calipatria 06:06:38 -57.5 Dark Down 6.9 315.8 Really Low 06:01:14 - 06:12:02 6954
Idyllwild 06:06:39 -56.3 Dark Down 8.0 315.2 Really Low 06:01:15 - 06:12:03 6920
Wildwood 06:06:41 -54.8 Dark Down 9.4 314.3 Really Low 06:01:17 - 06:12:05 6833

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 601690, (2026/02/16 06:02UT)
Object            RA         Dec     mag  sep  mel
Deneb          20:41:25.9 +45:16:49  1.3 42.35  65
57Gam1And      02:03:54.1 +42:19:46  2.3 15.79  93
32 And         00:41:07.2 +39:27:31  5.3  2.05  78
PPM 043212     00:42:01.4 +40:41:16  7.6  0.97  79
PPM 043130     00:37:33.9 +41:25:05  9.6  0.27  78
PPM 043141     00:38:06.7 +41:23:27 10.2  0.17  78
601690         00:38:57.6 +41:27:48 14.6        79
Positions are for J2000

Event circumstances last updated at 2023/09/03 03:40:26 UT

Marc W. Buie, Southwest Research Institute

RECON