RECON: TNO occultation with 601690

Event between (601690) 13KZ18 and star GA1400:00964947 with event index number of 2733454

Geocentric closest approach at 2028/10/18 10:55:22 UTC

J2000 position of star is 01:40:21.1 +50:36:03
Equinox of date position of star is 01:41:50.3 +50:43:12
Stellar brightness G=16.4, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 146 degrees from the moon. Moon is 0% illuminated.
Apparent brightness V=22.5

[RECON map]
Object is 22.4 AU from the Sun and 21.6 AU from the Earth.
Apparent velocity is 22.3 km/sec on the sky relative to the star, or, 5.1 arcsec/hr.
The 1-sigma error in the time of the event is 169 seconds.
The 1-sigma cross-track error in the shadow position is 2230 km.
The sky-plane scale is 15658.8 km/arcsec.

The object has an absolute magnitude Hv=8.9
Diameter=100.5 km assuming a 5% albedo -- 4.6 sec chord
Diameter=41.0 km assuming a 30% albedo -- 1.9 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 

Star training set for 601690, (2028/10/18 10:59UT)
Object            RA         Dec     mag  sep  mel
Deneb          20:42:24.9 +45:23:04  1.3 48.19 111
57Gam1And      02:05:40.8 +42:28:00  2.3  9.20 154
Phi Per        01:45:29.0 +50:49:57  4.1  0.53 145
PPM 026667     01:45:26.2 +51:39:35  7.9  1.05 145
PPM 026614     01:42:48.5 +50:38:55 10.0  0.14 146
601690         01:42:09.7 +50:44:44 16.4       145
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 23.2 km RECON observability=1.0 and success probability=20.7%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Sleaford 10:52:39 -25.4 Dark Down 53.8 292.0 Up 10:38:03 - 11:07:15 -1425
Kamloops 10:53:08 -34.2 Dark Down 61.7 287.7 Up 10:38:32 - 11:07:44 -2026
Kelowna 10:53:05 -34.1 Dark Down 60.9 289.5 Up 10:38:29 - 11:07:41 -2084
Peachland 10:53:05 -34.3 Dark Down 61.1 289.6 Up 10:38:29 - 11:07:41 -2104
Summerland 10:53:05 -34.3 Dark Down 61.0 289.9 Up 10:38:29 - 11:07:41 -2117
Penticton 10:53:04 -34.3 Dark Down 60.9 290.0 Up 10:38:28 - 11:07:40 -2120
Oliver 10:53:04 -34.4 Dark Down 60.8 290.6 Up 10:38:28 - 11:07:40 -2157
Anarchist Mountain Observatory 10:53:03 -34.4 Dark Down 60.6 291.0 Up 10:38:27 - 11:07:39 -2169
Okanogan 10:53:02 -34.8 Dark Down 60.5 291.9 Up 10:38:26 - 11:07:38 -2241
Brewster 10:53:03 -35.1 Dark Down 60.5 292.3 Up 10:38:27 - 11:07:39 -2275
Manson/Chelan 10:53:03 -35.4 Dark Down 60.7 292.6 Up 10:38:27 - 11:07:39 -2307
Victoria 10:53:13 -36.9 Dark Down 62.9 290.5 Up 10:38:37 - 11:07:49 -2329
Wenatchee 10:53:03 -35.7 Dark Down 60.6 293.3 Up 10:38:27 - 11:07:39 -2360
Ellensburg 10:53:03 -36.1 Dark Down 60.6 293.9 Up 10:38:27 - 11:07:39 -2409
Yakima 10:53:02 -36.3 Dark Down 60.4 294.6 Up 10:38:26 - 11:07:38 -2452
PNWRO 10:52:57 -35.5 Dark Down 59.1 295.8 Up 10:38:21 - 11:07:33 -2462
Toppenish/White Swan 10:53:01 -36.3 Dark Down 60.2 294.9 Up 10:38:25 - 11:07:37 -2469
Dunrhomin 10:52:11 -27.9 Dark Down 47.7 305.0 Up 10:37:35 - 11:06:47 -2497
Nikitin 10:52:11 -28.0 Dark Down 47.6 305.2 Up 10:37:35 - 11:06:47 -2515
CU-SBO 10:52:11 -28.1 Dark Down 47.6 305.2 Up 10:37:35 - 11:06:47 -2525
The Dalles 10:53:02 -37.1 Dark Down 60.4 296.0 Up 10:38:26 - 11:07:38 -2572
Maupin 10:53:01 -37.2 Dark Down 60.1 296.7 Up 10:38:25 - 11:07:37 -2612
Sisters 10:53:01 -37.9 Dark Down 60.0 298.0 Up 10:38:25 - 11:07:37 -2717
Bend 10:53:00 -37.9 Dark Down 59.7 298.4 Up 10:38:24 - 11:07:36 -2734
Oregon Observatory 10:53:00 -38.1 Dark Down 59.7 298.6 Up 10:38:24 - 11:07:36 -2756
Chiloquin 10:53:00 -38.9 Dark Down 59.4 300.5 Up 10:38:24 - 11:07:36 -2904
Klamath Falls 10:52:59 -39.0 Dark Down 59.1 301.0 Up 10:38:23 - 11:07:35 -2937
Cedarville 10:52:53 -38.2 Dark Down 57.8 302.1 Up 10:38:17 - 11:07:29 -2959
Fall River/Burney 10:52:57 -39.3 Dark Down 58.3 302.7 Up 10:38:21 - 11:07:33 -3047
Gimple 10:52:54 -39.3 Dark Down 57.4 303.9 Up 10:38:18 - 11:07:30 -3123
Greenville 10:52:54 -39.3 Dark Down 57.5 303.9 Up 10:38:18 - 11:07:30 -3125
Portola 10:52:52 -39.1 Dark Down 57.0 304.3 Up 10:38:16 - 11:07:28 -3144
Quincy 10:52:54 -39.4 Dark Down 57.4 304.2 Up 10:38:18 - 11:07:30 -3146
Reno 10:52:50 -38.8 Dark Down 56.5 304.6 Up 10:38:14 - 11:07:26 -3149
Yerington 10:52:47 -38.5 Dark Down 55.7 305.3 Up 10:38:11 - 11:07:23 -3183
Carson City 10:52:49 -38.9 Dark Down 56.2 305.1 Up 10:38:13 - 11:07:25 -3185
Gardnerville 10:52:49 -39.0 Dark Down 56.1 305.4 Up 10:38:13 - 11:07:25 -3208
Hawthorne 10:52:45 -38.3 Dark Down 55.1 305.8 Up 10:38:09 - 11:07:21 -3212
Lee Vining 10:52:46 -38.9 Dark Down 55.1 306.5 Up 10:38:10 - 11:07:22 -3286
Beatty 10:52:37 -37.5 Dark Down 53.0 307.5 Up 10:38:01 - 11:07:13 -3307
Bishop 10:52:43 -38.5 Dark Down 54.3 307.1 Up 10:38:07 - 11:07:19 -3320
Patrick 10:52:27 -35.7 Dark Down 50.3 308.9 Up 10:37:51 - 11:07:03 -3340
Laughlin/Bullhead City 10:52:29 -36.3 Dark Down 50.6 309.2 Up 10:37:53 - 11:07:05 -3392
George/Scottsdale 10:52:19 -34.5 Dark Down 47.9 310.3 Up 10:37:43 - 11:06:55 -3418
Lake Havasu City 10:52:27 -36.2 Dark Down 50.0 309.8 Up 10:37:51 - 11:07:03 -3447
Idyllwild 10:52:33 -38.3 Dark Down 51.0 310.7 Up 10:37:57 - 11:07:09 -3617
Calipatria 10:52:29 -37.5 Dark Down 49.8 311.1 Up 10:37:53 - 11:07:05 -3629
Yuma 10:52:25 -36.9 Dark Down 49.0 311.4 Up 10:37:49 - 11:07:01 -3635
Wildwood 10:52:39 -39.7 Dark Down 52.4 310.6 Up 10:38:03 - 11:07:15 -3653

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, (2028/10/18 10:59UT)
Object            RA         Dec     mag  sep  mel
Deneb          20:41:25.9 +45:16:49  1.3 48.19 111
57Gam1And      02:03:54.1 +42:19:46  2.3  9.20 154
Phi Per        01:43:39.7 +50:41:19  4.1  0.53 145
PPM 026667     01:43:36.3 +51:30:57  7.9  1.05 145
PPM 026614     01:40:59.8 +50:30:14 10.0  0.14 146
601690         01:40:21.1 +50:36:03 16.4       146
Positions are for J2000

Event circumstances last updated at 2023/09/04 01:04:52 UT

Marc W. Buie, Southwest Research Institute

RECON