RECON: TNO occultation with 601690

Event between (601690) 13KZ18 and star GA1380:00742281 with event index number of 2733476

Geocentric closest approach at 2028/12/22 05:33:21 UTC

J2000 position of star is 01:30:23.4 +49:17:19
Equinox of date position of star is 01:31:50.4 +49:24:36
Stellar brightness G=15.6, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 63 degrees from the moon. Moon is 35% illuminated.
Apparent brightness V=22.6

[RECON map]
Object is 22.4 AU from the Sun and 21.9 AU from the Earth.
Apparent velocity is 18.5 km/sec on the sky relative to the star, or, 4.2 arcsec/hr.
The 1-sigma error in the time of the event is 122 seconds.
The 1-sigma cross-track error in the shadow position is 3257 km.
The sky-plane scale is 15885.8 km/arcsec.

The object has an absolute magnitude Hv=8.9
Diameter=100.5 km assuming a 5% albedo -- 5.5 sec chord
Diameter=41.0 km assuming a 30% albedo -- 2.3 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 

Star training set for 601690, (2028/12/22 05:37UT)
Object            RA         Dec     mag  sep  mel
Deneb          20:42:25.2 +45:23:06  1.3 47.27  56
57Gam1And      02:05:41.5 +42:28:03  2.3  9.07  63
51 And         01:39:47.2 +48:46:27  3.6  1.41  63
PPM 044075     01:32:45.5 +49:29:30  7.7  0.11  63
601690         01:32:10.0 +49:26:14 15.6        63
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 25.9 km RECON observability=1.0 and success probability=9.7%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Victoria 05:32:35 -49.8 Dark Up 71.4 283.1 Up 05:21:55 - 05:43:14 -3238
Kamloops 05:32:17 -50.6 Dark Up 69.9 278.3 Up 05:21:38 - 05:42:57 -3247
Peachland 05:32:20 -51.3 Dark Up 69.4 281.1 Up 05:21:41 - 05:43:00 -3343
Kelowna 05:32:19 -51.5 Dark Up 69.2 280.9 Up 05:21:40 - 05:42:59 -3350
Summerland 05:32:21 -51.5 Dark Up 69.3 281.5 Up 05:21:41 - 05:43:00 -3359
Penticton 05:32:21 -51.6 Dark Up 69.2 281.7 Up 05:21:41 - 05:43:00 -3369
Oliver 05:32:22 -51.7 Dark Up 69.1 282.6 Up 05:21:43 - 05:43:02 -3395
Anarchist Mountain Observatory 05:32:23 -51.9 Dark Up 68.9 283.1 Up 05:21:43 - 05:43:02 -3417
Okanogan 05:32:26 -52.1 Dark Up 68.9 284.7 Up 05:21:46 - 05:43:05 -3452
Manson/Chelan 05:32:30 -52.0 Dark Up 69.2 285.7 Up 05:21:50 - 05:43:09 -3457
Brewster 05:32:28 -52.1 Dark Up 69.0 285.3 Up 05:21:48 - 05:43:07 -3461
Wenatchee 05:32:32 -52.1 Dark Up 69.1 286.9 Up 05:21:53 - 05:43:12 -3481
Ellensburg 05:32:34 -52.2 Dark Up 69.1 287.9 Up 05:21:55 - 05:43:14 -3499
Yakima 05:32:37 -52.4 Dark Up 69.0 288.9 Up 05:21:57 - 05:43:16 -3526
Toppenish/White Swan 05:32:37 -52.6 Dark Up 68.8 289.5 Up 05:21:57 - 05:43:16 -3550
The Dalles 05:32:43 -52.4 Dark Up 69.1 291.3 Up 05:22:03 - 05:43:22 -3561
Maupin 05:32:44 -52.6 Dark Up 68.8 292.3 Up 05:22:05 - 05:43:24 -3595
Sisters 05:32:50 -52.6 Dark Up 68.8 294.4 Up 05:22:10 - 05:43:29 -3627
PNWRO 05:32:35 -53.6 Dark Up 67.7 290.5 Up 05:21:55 - 05:43:14 -3657
Bend 05:32:50 -52.9 Dark Up 68.5 294.9 Up 05:22:10 - 05:43:29 -3658
Oregon Observatory 05:32:51 -52.9 Dark Up 68.5 295.3 Up 05:22:12 - 05:43:31 -3663
Chiloquin 05:32:58 -53.1 Dark Up 68.2 298.4 Up 05:22:19 - 05:43:38 -3726
Sleaford 05:31:36 -56.5 Dark Up 61.4 282.8 Up 05:20:56 - 05:42:15 -3752
Klamath Falls 05:33:00 -53.2 Dark Up 68.0 299.1 Up 05:22:20 - 05:43:39 -3753
Fall River/Burney 05:33:04 -53.9 Dark Up 67.1 301.5 Up 05:22:25 - 05:43:44 -3853
Cedarville 05:32:58 -54.6 Dark Up 66.6 300.2 Up 05:22:19 - 05:43:38 -3894
Greenville 05:33:07 -54.5 Dark Up 66.3 303.1 Up 05:22:28 - 05:43:47 -3939
Gimple 05:33:07 -54.5 Dark Up 66.3 303.1 Up 05:22:27 - 05:43:46 -3945
Quincy 05:33:08 -54.5 Dark Up 66.2 303.5 Up 05:22:28 - 05:43:47 -3953
Portola 05:33:07 -54.9 Dark Up 65.8 303.6 Up 05:22:28 - 05:43:47 -3990
Reno 05:33:06 -55.5 Dark Up 65.3 303.9 Up 05:22:27 - 05:43:46 -4046
Carson City 05:33:08 -55.6 Dark Up 65.1 304.5 Up 05:22:28 - 05:43:47 -4071
Gardnerville 05:33:09 -55.7 Dark Up 64.9 304.9 Up 05:22:29 - 05:43:48 -4090
Yerington 05:33:07 -56.1 Dark Up 64.5 304.6 Up 05:22:28 - 05:43:47 -4122
Hawthorne 05:33:08 -56.7 Dark Up 63.9 305.3 Up 05:22:28 - 05:43:47 -4184
Lee Vining 05:33:12 -56.5 Dark Up 63.9 306.4 Up 05:22:32 - 05:43:51 -4192
Bishop 05:33:12 -57.2 Dark Up 63.1 307.1 Up 05:22:32 - 05:43:51 -4274
Beatty 05:33:09 -58.5 Dark Up 61.8 307.3 Up 05:22:30 - 05:43:49 -4401
Wildwood 05:33:27 -57.8 Dark Up 61.1 311.9 Up 05:22:48 - 05:44:07 -4468
Idyllwild 05:33:23 -59.4 Dark Up 59.7 311.6 Up 05:22:44 - 05:44:03 -4607
Laughlin/Bullhead City 05:33:10 -60.7 Dark Up 59.3 309.0 Up 05:22:31 - 05:43:50 -4641
Patrick 05:33:07 -61.2 Dark Up 59.0 308.5 Up 05:22:27 - 05:43:46 -4665
Lake Havasu City 05:33:12 -61.1 Dark Up 58.7 309.8 Up 05:22:33 - 05:43:52 -4699
Calipatria 05:33:22 -60.5 Dark Up 58.6 311.9 Up 05:22:43 - 05:44:02 -4716
Dunrhomin 05:32:18 -65.1 Dark Up 56.3 301.4 Up 05:21:39 - 05:42:58 -4750
Nikitin 05:32:19 -65.2 Dark Up 56.2 301.6 Up 05:21:40 - 05:42:59 -4763
CU-SBO 05:32:20 -65.2 Dark Up 56.2 301.7 Up 05:21:40 - 05:42:59 -4765
Yuma 05:33:21 -61.3 Dark Up 57.7 312.1 Up 05:22:41 - 05:44:00 -4797
George/Scottsdale 05:33:07 -63.3 Dark Up 56.7 310.1 Up 05:22:28 - 05:43:47 -4889

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, (2028/12/22 05:37UT)
Object            RA         Dec     mag  sep  mel
Deneb          20:41:25.9 +45:16:49  1.3 47.27  56
57Gam1And      02:03:54.1 +42:19:46  2.3  9.07  63
51 And         01:37:59.7 +48:37:39  3.6  1.41  63
PPM 044075     01:30:58.8 +49:20:35  7.7  0.11  63
601690         01:30:23.4 +49:17:19 15.6        62
Positions are for J2000

Event circumstances last updated at 2023/09/04 01:06:38 UT

Marc W. Buie, Southwest Research Institute

RECON