RECON: TNO occultation with 601690

Event between (601690) 13KZ18 and star GA1400:00998840 with event index number of 2733446

Geocentric closest approach at 2028/09/30 03:24:25 UTC

J2000 position of star is 01:44:04.6 +50:38:27
Equinox of date position of star is 01:45:34.5 +50:45:32
Stellar brightness G=14.2, use SENSEUP=64 with the MallinCam and and exposure time of 1 seconds with the QHY174 camera.
Star is 77 degrees from the moon. Moon is 89% illuminated.
Apparent brightness V=22.5

[RECON map]
Object is 22.3 AU from the Sun and 21.7 AU from the Earth.
Apparent velocity is 20.0 km/sec on the sky relative to the star, or, 4.6 arcsec/hr.
The 1-sigma error in the time of the event is 193 seconds.
The 1-sigma cross-track error in the shadow position is 2278 km.
The sky-plane scale is 15724.0 km/arcsec.

The object has an absolute magnitude Hv=8.9
Diameter=100.5 km assuming a 5% albedo -- 5.1 sec chord
Diameter=41.0 km assuming a 30% albedo -- 2.1 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 

Star training set for 601690, (2028/09/30 03:24UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:37:34.4 +16:33:54  0.8 48.34 101
57Gam1And      02:05:40.6 +42:27:59  2.3  8.98  76
Phi Per        01:45:28.8 +50:49:56  4.1  0.08  77
PPM 026757     01:49:18.4 +50:53:36  8.2  0.55  77
PPM 026673     01:45:37.0 +50:45:22  8.9  0.05  77
601690         01:45:53.8 +50:47:03 14.2        77
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 4.7 sigma about the mid-time.
The median site spacing is 25.4 km RECON observability=1.0 and success probability=18.0%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Victoria 03:28:09 -16.1 AT Up 36.4 52.0 Up 03:13:09 - 03:43:09 -1177
Kamloops 03:28:00 -17.4 AT Up 39.3 54.7 Up 03:13:00 - 03:43:00 -1220
Peachland 03:28:03 -18.1 Dark Up 39.1 54.4 Up 03:13:03 - 03:43:03 -1307
Kelowna 03:28:02 -18.2 Dark Up 39.3 54.6 Up 03:13:02 - 03:43:02 -1317
Summerland 03:28:04 -18.2 Dark Up 39.0 54.3 Up 03:13:04 - 03:43:04 -1322
Penticton 03:28:03 -18.2 Dark Up 39.1 54.3 Up 03:13:03 - 03:43:03 -1332
Oliver 03:28:05 -18.4 Dark Up 38.9 54.1 Up 03:13:05 - 03:43:05 -1353
Anarchist Mountain Observatory 03:28:05 -18.5 Dark Up 38.9 54.1 Up 03:13:05 - 03:43:05 -1374
Manson/Chelan 03:28:10 -18.4 Dark Up 37.8 53.0 Up 03:13:10 - 03:43:10 -1399
Okanogan 03:28:08 -18.6 Dark Up 38.4 53.6 Up 03:13:08 - 03:43:08 -1402
Brewster 03:28:09 -18.5 Dark Up 38.1 53.3 Up 03:13:09 - 03:43:09 -1407
Wenatchee 03:28:12 -18.4 Dark Up 37.4 52.7 Up 03:13:12 - 03:43:12 -1418
Ellensburg 03:28:14 -18.4 Dark Up 37.0 52.3 Up 03:13:14 - 03:43:14 -1431
Yakima 03:28:16 -18.5 Dark Up 36.8 52.1 Up 03:13:16 - 03:43:16 -1455
Toppenish/White Swan 03:28:16 -18.7 Dark Up 36.7 52.0 Up 03:13:16 - 03:43:16 -1478
The Dalles 03:28:19 -18.3 Dark Up 35.8 51.3 Up 03:13:19 - 03:43:19 -1480
Maupin 03:28:21 -18.5 Dark Up 35.6 51.1 Up 03:13:21 - 03:43:21 -1512
Sisters 03:28:24 -18.4 Dark Up 34.8 50.4 Up 03:13:24 - 03:43:24 -1537
Bend 03:28:25 -18.7 Dark Up 34.8 50.4 Up 03:13:25 - 03:43:25 -1567
Oregon Observatory 03:28:25 -18.6 Dark Up 34.6 50.2 Up 03:13:25 - 03:43:25 -1570
PNWRO 03:28:16 -19.8 Dark Up 37.3 52.4 Up 03:13:16 - 03:43:16 -1589
Chiloquin 03:28:30 -18.7 Dark Up 33.6 49.4 Up 03:13:30 - 03:43:30 -1627
Klamath Falls 03:28:31 -18.8 Dark Up 33.4 49.3 Up 03:13:31 - 03:43:31 -1654
Fall River/Burney 03:28:35 -19.4 Dark Up 32.8 48.8 Up 03:13:35 - 03:43:35 -1753
Cedarville 03:28:33 -20.1 Dark Up 33.8 49.5 Up 03:13:33 - 03:43:33 -1800
Greenville 03:28:38 -19.9 Dark Up 32.5 48.5 Up 03:13:38 - 03:43:38 -1841
Gimple 03:28:38 -20.0 Dark Up 32.5 48.6 Up 03:13:38 - 03:43:38 -1847
Quincy 03:28:38 -20.0 Dark Up 32.4 48.5 Up 03:13:38 - 03:43:38 -1855
Sleaford 03:27:40 -25.0 Dark Up 47.7 62.7 Up 03:12:40 - 03:42:40 -1860
Portola 03:28:38 -20.4 Dark Up 32.6 48.5 Up 03:13:38 - 03:43:38 -1894
Reno 03:28:39 -20.9 Dark Up 32.8 48.6 Up 03:13:39 - 03:43:39 -1954
Carson City 03:28:40 -21.0 Dark Up 32.5 48.5 Up 03:13:40 - 03:43:40 -1979
Gardnerville 03:28:41 -21.1 Dark Up 32.4 48.4 Up 03:13:41 - 03:43:41 -1999
Yerington 03:28:40 -21.5 Dark Up 32.8 48.6 Up 03:13:40 - 03:43:40 -2034
Hawthorne 03:28:41 -22.1 Dark Up 32.8 48.5 Up 03:13:41 - 03:43:41 -2100
Lee Vining 03:28:43 -21.8 Dark Up 32.1 48.1 Up 03:13:43 - 03:43:43 -2106
Bishop 03:28:44 -22.5 Dark Up 32.2 48.0 Up 03:13:44 - 03:43:44 -2195
Beatty 03:28:44 -23.9 Dark Up 32.8 48.2 Up 03:13:44 - 03:43:44 -2337
Wildwood 03:28:53 -23.2 Dark Up 29.8 46.5 Low 03:13:53 - 03:43:53 -2409
Idyllwild 03:28:53 -24.8 Dark Up 30.7 46.8 Up 03:13:53 - 03:43:53 -2565
Laughlin/Bullhead City 03:28:47 -26.1 Dark Up 33.0 47.9 Up 03:13:47 - 03:43:47 -2607
Patrick 03:28:45 -26.6 Dark Up 33.6 48.2 Up 03:13:45 - 03:43:45 -2637
Lake Havasu City 03:28:48 -26.5 Dark Up 32.7 47.6 Up 03:13:48 - 03:43:48 -2674
Calipatria 03:28:53 -25.9 Dark Up 31.0 46.8 Up 03:13:53 - 03:43:53 -2692
Yuma 03:28:53 -26.7 Dark Up 31.3 46.8 Up 03:13:53 - 03:43:53 -2785
Dunrhomin 03:28:18 -31.2 Dark Up 41.9 53.0 Up 03:13:18 - 03:43:18 -2811
Nikitin 03:28:19 -31.2 Dark Up 41.8 52.9 Up 03:13:19 - 03:43:19 -2825
CU-SBO 03:28:19 -31.2 Dark Up 41.7 52.8 Up 03:13:19 - 03:43:19 -2825
George/Scottsdale 03:28:47 -28.7 Dark Up 33.7 47.8 Up 03:13:47 - 03:43:47 -2898

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, (2028/09/30 03:24UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:35:55.3 +16:30:29  0.8 48.34 101
57Gam1And      02:03:54.1 +42:19:46  2.3  8.98  76
Phi Per        01:43:39.7 +50:41:19  4.1  0.08  77
PPM 026757     01:47:28.6 +50:45:03  8.2  0.55  77
PPM 026673     01:43:47.9 +50:36:45  8.9  0.05  77
601690         01:44:04.6 +50:38:27 14.2        77
Positions are for J2000

Event circumstances last updated at 2023/09/04 01:04:24 UT

Marc W. Buie, Southwest Research Institute

RECON