RECON: TNO occultation with 601690

Event between (601690) 13KZ18 and star GA1400:00980135 with event index number of 2733451

Geocentric closest approach at 2028/10/10 10:16:23 UTC

J2000 position of star is 01:42:01.5 +50:38:29
Equinox of date position of star is 01:43:31.0 +50:45:36
Stellar brightness G=16.5, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 58 degrees from the moon. Moon is 61% illuminated.
Apparent brightness V=22.5

[RECON map]
Object is 22.3 AU from the Sun and 21.6 AU from the Earth.
Apparent velocity is 21.4 km/sec on the sky relative to the star, or, 4.9 arcsec/hr.
The 1-sigma error in the time of the event is 180 seconds.
The 1-sigma cross-track error in the shadow position is 2181 km.
The sky-plane scale is 15680.9 km/arcsec.

The object has an absolute magnitude Hv=8.9
Diameter=100.5 km assuming a 5% albedo -- 4.8 sec chord
Diameter=41.0 km assuming a 30% albedo -- 2.0 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 

Star training set for 601690, (2028/10/10 10:16UT)
Object            RA         Dec     mag  sep  mel
Deneb          20:42:24.8 +45:23:04  1.3 48.41 103
57Gam1And      02:05:40.7 +42:27:59  2.3  9.12  55
Phi Per        01:45:28.9 +50:49:57  4.1  0.26  58
PPM 026757     01:49:18.5 +50:53:36  8.2  0.87  58
PPM 026614     01:42:48.4 +50:38:54 10.0  0.21  59
601690         01:43:50.4 +50:47:08 16.5        58
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 33.2 km RECON observability=1.0 and success probability=13.8%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Sleaford 10:14:19 -28.7 Dark Up 64.3 283.5 Up 09:59:19 - 10:29:19 -2583
Kamloops 10:14:57 -36.7 Dark Up 72.7 280.6 Up 09:59:57 - 10:29:57 -3089
Kelowna 10:14:53 -36.8 Dark Up 72.0 283.4 Up 09:59:53 - 10:29:53 -3158
Peachland 10:14:54 -37.1 Dark Up 72.2 283.6 Up 09:59:54 - 10:29:54 -3176
Summerland 10:14:53 -37.1 Dark Up 72.1 284.1 Up 09:59:53 - 10:29:53 -3190
Penticton 10:14:52 -37.1 Dark Up 72.0 284.3 Up 09:59:52 - 10:29:52 -3194
Oliver 10:14:52 -37.3 Dark Up 71.9 285.4 Up 09:59:52 - 10:29:52 -3232
Anarchist Mountain Observatory 10:14:51 -37.3 Dark Up 71.7 285.9 Up 09:59:51 - 10:29:51 -3246
Okanogan 10:14:51 -37.9 Dark Up 71.7 287.8 Up 09:59:51 - 10:29:51 -3320
Brewster 10:14:52 -38.2 Dark Up 71.7 288.5 Up 09:59:52 - 10:29:52 -3353
Victoria 10:15:03 -39.6 Dark Up 74.1 286.9 Up 10:00:03 - 10:30:03 -3376
Manson/Chelan 10:14:52 -38.5 Dark Up 71.9 289.1 Up 09:59:52 - 10:29:52 -3383
Wenatchee 10:14:52 -38.9 Dark Up 71.8 290.4 Up 09:59:52 - 10:29:52 -3437
Ellensburg 10:14:52 -39.3 Dark Up 71.8 291.6 Up 09:59:52 - 10:29:52 -3486
Yakima 10:14:52 -39.5 Dark Up 71.7 292.8 Up 09:59:52 - 10:29:52 -3530
Toppenish/White Swan 10:14:51 -39.6 Dark Up 71.5 293.3 Up 09:59:51 - 10:29:51 -3549
PNWRO 10:14:46 -39.0 Dark Up 70.4 294.2 Up 09:59:46 - 10:29:46 -3556
The Dalles 10:14:53 -40.5 Dark Up 71.7 295.6 Up 09:59:53 - 10:29:53 -3649
Maupin 10:14:52 -40.7 Dark Up 71.4 296.7 Up 09:59:52 - 10:29:52 -3692
Dunrhomin 10:13:53 -33.3 Dark Up 59.0 303.9 Up 09:58:53 - 10:28:53 -3734
Nikitin 10:13:53 -33.4 Dark Up 58.9 304.2 Up 09:58:53 - 10:28:53 -3753
CU-SBO 10:13:53 -33.4 Dark Up 58.9 304.3 Up 09:58:53 - 10:28:53 -3762
Sisters 10:14:52 -41.5 Dark Up 71.3 299.1 Up 09:59:52 - 10:29:52 -3796
Bend 10:14:51 -41.6 Dark Up 71.0 299.7 Up 09:59:51 - 10:29:51 -3816
Oregon Observatory 10:14:52 -41.7 Dark Up 71.0 300.1 Up 09:59:52 - 10:29:52 -3837
Chiloquin 10:14:51 -42.8 Dark Up 70.6 303.5 Up 09:59:51 - 10:29:51 -3987
Klamath Falls 10:14:51 -43.0 Dark Up 70.4 304.3 Up 09:59:51 - 10:29:51 -4022
Cedarville 10:14:45 -42.5 Dark Up 69.0 305.1 Up 09:59:45 - 10:29:45 -4060
Fall River/Burney 10:14:49 -43.5 Dark Up 69.4 306.7 Up 09:59:49 - 10:29:49 -4139
Gimple 10:14:46 -43.7 Dark Up 68.6 308.3 Up 09:59:46 - 10:29:46 -4223
Greenville 10:14:46 -43.7 Dark Up 68.6 308.4 Up 09:59:46 - 10:29:46 -4225
Quincy 10:14:46 -43.9 Dark Up 68.5 308.8 Up 09:59:46 - 10:29:46 -4247
Portola 10:14:44 -43.6 Dark Up 68.1 308.7 Up 09:59:44 - 10:29:44 -4249
Reno 10:14:41 -43.4 Dark Up 67.6 308.9 Up 09:59:41 - 10:29:41 -4262
Carson City 10:14:41 -43.6 Dark Up 67.4 309.6 Up 09:59:41 - 10:29:41 -4299
Yerington 10:14:38 -43.3 Dark Up 66.9 309.6 Up 09:59:38 - 10:29:38 -4304
Gardnerville 10:14:40 -43.7 Dark Up 67.2 310.0 Up 09:59:40 - 10:29:40 -4324
Hawthorne 10:14:36 -43.2 Dark Up 66.2 310.1 Up 09:59:36 - 10:29:36 -4339
Lee Vining 10:14:37 -43.8 Dark Up 66.2 311.4 Up 09:59:37 - 10:29:37 -4411
Bishop 10:14:34 -43.7 Dark Up 65.3 312.0 Up 09:59:34 - 10:29:34 -4455
Beatty 10:14:27 -42.8 Dark Up 64.1 311.8 Up 09:59:27 - 10:29:27 -4458
Patrick 10:14:16 -41.4 Dark Up 61.4 312.7 Up 09:59:16 - 10:29:16 -4525
Laughlin/Bullhead City 10:14:18 -42.1 Dark Up 61.6 313.3 Up 09:59:18 - 10:29:18 -4571
George/Scottsdale 10:14:06 -40.6 Dark Up 59.0 314.0 Up 09:59:06 - 10:29:06 -4629
Lake Havasu City 10:14:16 -42.2 Dark Up 61.0 314.1 Up 09:59:16 - 10:29:16 -4632
Idyllwild 10:14:24 -44.2 Dark Up 61.9 316.3 Up 09:59:24 - 10:29:24 -4782
Wildwood 10:14:31 -45.4 Dark Up 63.2 316.9 Up 09:59:31 - 10:29:31 -4798
Calipatria 10:14:19 -43.6 Dark Up 60.7 316.4 Up 09:59:19 - 10:29:19 -4808
Yuma 10:14:15 -43.1 Dark Up 59.9 316.5 Up 09:59:15 - 10:29:15 -4824

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, (2028/10/10 10:16UT)
Object            RA         Dec     mag  sep  mel
Deneb          20:41:25.9 +45:16:49  1.3 48.41 103
57Gam1And      02:03:54.1 +42:19:46  2.3  9.12  55
Phi Per        01:43:39.7 +50:41:19  4.1  0.26  58
PPM 026757     01:47:28.6 +50:45:03  8.2  0.87  58
PPM 026614     01:40:59.8 +50:30:14 10.0  0.21  59
601690         01:42:01.5 +50:38:29 16.5        58
Positions are for J2000

Event circumstances last updated at 2023/09/04 01:04:43 UT

Marc W. Buie, Southwest Research Institute

RECON