RECON: TNO occultation with 13RJ124

Event between 13RJ124 and star GA0980:00175615 with event index number of 1854163

Geocentric closest approach at 2025/10/19 11:49:02 UTC

J2000 position of star is 02:03:12.5 +08:11:15
Equinox of date position of star is 02:04:18.6 +08:17:13
Stellar brightness G=14.8, use SENSEUP=128
Star is 152 degrees from the moon. Moon is 4% illuminated.
TNO apparent brightness V=26.5

[RECON map]
TNO is 45.3 AU from the Sun and 44.3 AU from the Earth.
The TNO is moving 25.5 km/sec on the sky relative to the star, or, 2.9 arcsec/hr.
The 1-sigma error in the time of the event is 352 seconds.
The 1-sigma cross-track error in the shadow position is 4204 km.
The sky-plane scale is 32105.9 km/arcsec.

The TNO has an absolute magnitude Hv=10.0
Diameter=272.9 km assuming a 5% albedo -- 2.4 sec chord
Diameter=111.4 km assuming a 30% albedo -- 1.0 sec chord
Dynamical classification is CLASSICAL
 
 
 
 
 
 

Star training set for 13RJ124, (2025/10/19 11:49UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:37:24.2 +16:33:33  0.8 38.14 114
68Omi Cet      02:20:39.1 -02:51:41  2.0 11.87 148
65Xi 1Cet      02:14:22.3 +08:58:00  4.4  2.51 149
PPM 145259     02:05:22.1 +08:13:03  8.1  0.22 152
13RJ124        02:04:34.4 +08:18:38 14.8       152
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 2.6 sigma about the mid-time.
The median site spacing is 24.5 km RECON observability=1.0 and success probability=9.9%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Clarence Fulton 11:45:59 -26.2 Dark Down 28.4 246.6 Low 11:30:59 - 12:00:59 -3026
Kelowna 11:45:58 -26.4 Dark Down 28.7 246.6 Low 11:30:58 - 12:00:58 -3063
Peachland 11:45:59 -26.6 Dark Down 28.9 246.4 Low 11:30:59 - 12:00:59 -3071
Summerland 11:45:58 -26.6 Dark Down 28.9 246.5 Low 11:30:58 - 12:00:58 -3087
Penticton 11:45:58 -26.5 Dark Down 28.9 246.7 Low 11:30:58 - 12:00:58 -3094
Oliver 11:45:58 -26.6 Dark Down 29.0 246.9 Low 11:30:58 - 12:00:58 -3128
Anarchist Mountain Observatory 11:45:57 -26.6 Dark Down 29.0 247.1 Low 11:30:57 - 12:00:57 -3146
Victoria 11:46:03 -29.2 Dark Down 31.6 243.7 Up 11:31:03 - 12:01:03 -3163
Tonasket 11:45:57 -26.7 Dark Down 29.1 247.2 Low 11:30:57 - 12:00:57 -3176
Okanogan 11:45:56 -26.9 Dark Down 29.4 247.3 Low 11:30:56 - 12:00:56 -3208
Brewster 11:45:57 -27.1 Dark Down 29.6 247.2 Low 11:30:57 - 12:00:57 -3233
Manson/Chelan 11:45:57 -27.4 Dark Down 29.9 247.0 Low 11:30:57 - 12:00:57 -3251
Entiat 11:45:57 -27.5 Dark Down 30.0 247.0 Up 11:30:57 - 12:00:57 -3273
Wenatchee 11:45:57 -27.6 Dark Down 30.2 247.1 Up 11:30:57 - 12:00:57 -3297
Ellensburg 11:45:57 -27.9 Dark Down 30.5 247.1 Up 11:30:57 - 12:00:57 -3336
Yakima 11:45:56 -28.0 Dark Down 30.6 247.3 Up 11:30:56 - 12:00:56 -3377
Toppenish/White Swan 11:45:55 -28.0 Dark Down 30.6 247.6 Up 11:30:55 - 12:00:55 -3400
Pasco 11:45:53 -27.1 Dark Down 29.9 248.8 Low 11:30:53 - 12:00:53 -3421
PNWRO 11:45:52 -27.1 Dark Down 29.8 249.1 Low 11:30:52 - 12:00:52 -3448
Goldendale 11:45:55 -28.4 Dark Down 31.1 247.5 Up 11:30:55 - 12:00:55 -3452
The Dalles 11:45:56 -28.7 Dark Down 31.4 247.3 Up 11:30:56 - 12:00:56 -3472
Maupin 11:45:55 -28.7 Dark Down 31.5 247.7 Up 11:30:55 - 12:00:55 -3515
Sisters 11:45:55 -29.3 Dark Down 32.2 247.7 Up 11:30:55 - 12:00:55 -3599
Redmond 11:45:55 -29.0 Dark Down 31.9 248.1 Up 11:30:55 - 12:00:55 -3605
Bend 11:45:54 -29.2 Dark Down 32.1 248.1 Up 11:30:54 - 12:00:54 -3626
Oregon Observatory 11:45:55 -29.3 Dark Down 32.3 248.1 Up 11:30:55 - 12:00:55 -3642
La Pine/Gilchrist 11:45:55 -29.4 Dark Down 32.4 248.2 Up 11:30:55 - 12:00:55 -3662
North Lake 11:45:52 -29.1 Dark Down 32.1 248.9 Up 11:30:52 - 12:00:52 -3712
Paisley 11:45:51 -29.0 Dark Down 32.1 249.5 Up 11:30:51 - 12:00:51 -3771
Klamath Falls 11:45:53 -30.0 Dark Down 33.1 248.8 Up 11:30:53 - 12:00:53 -3809
Lakeview 11:45:51 -29.0 Dark Down 32.1 250.0 Up 11:30:51 - 12:00:51 -3825
Cedarville 11:45:49 -29.0 Dark Down 32.2 250.5 Up 11:30:49 - 12:00:49 -3894
Fall River/Burney 11:45:52 -30.0 Dark Down 33.2 249.8 Up 11:30:52 - 12:00:52 -3934
Susanville 11:45:49 -29.6 Dark Down 32.9 250.8 Up 11:30:49 - 12:00:49 -4006
Greenville 11:45:50 -29.9 Dark Down 33.2 250.7 Up 11:30:50 - 12:00:50 -4032
Gimple 11:45:50 -29.8 Dark Down 33.2 250.8 Up 11:30:50 - 12:00:50 -4033
Quincy 11:45:50 -29.9 Dark Down 33.3 250.9 Up 11:30:50 - 12:00:50 -4054
Portola 11:45:49 -29.6 Dark Down 33.0 251.3 Up 11:30:49 - 12:00:49 -4071
Reno 11:45:47 -29.2 Dark Down 32.6 252.0 Up 11:30:47 - 12:00:47 -4104
Niwot 11:45:24 -18.0 Dark Up 21.6 262.3 Low 11:30:24 - 12:00:24 -4106
SwRI 11:45:23 -18.1 Dark Up 21.7 262.3 Low 11:30:23 - 12:00:23 -4117
Carson City 11:45:47 -29.2 Dark Down 32.7 252.2 Up 11:30:47 - 12:00:47 -4142
Yerington 11:45:45 -28.8 Dark Down 32.3 252.8 Up 11:30:45 - 12:00:45 -4167
Gardnerville 11:45:47 -29.2 Dark Down 32.7 252.4 Up 11:30:47 - 12:00:47 -4168
Hawthorne 11:45:44 -28.5 Dark Down 32.0 253.5 Up 11:30:44 - 12:00:44 -4221
Lee Vining 11:45:44 -28.9 Dark Down 32.6 253.5 Up 11:30:44 - 12:00:44 -4276
Tonopah 11:45:40 -27.5 Dark Down 31.1 254.9 Up 11:30:40 - 12:00:40 -4280
Bishop 11:45:42 -28.5 Dark Down 32.2 254.4 Up 11:30:42 - 12:00:42 -4346
Beatty 11:45:38 -27.3 Dark Down 31.1 255.9 Up 11:30:38 - 12:00:38 -4407
Indian Springs 11:45:36 -26.5 Dark Down 30.3 256.8 Up 11:30:36 - 12:00:36 -4448
Henderson 11:45:35 -26.0 Dark Down 29.9 257.6 Low 11:30:35 - 12:00:35 -4510
CPSLO 11:45:46 -30.6 Dark Down 34.5 254.0 Up 11:30:46 - 12:00:46 -4546
Searchlight/Boulder City 11:45:34 -26.0 Dark Down 30.0 258.0 Low 11:30:34 - 12:00:34 -4572
Patrick 11:45:32 -25.1 Dark Down 29.1 258.7 Low 11:30:32 - 12:00:32 -4583
Laughlin/Bullhead City 11:45:33 -25.7 Dark Down 29.7 258.4 Low 11:30:33 - 12:00:33 -4606
Kingman/Dolan Springs 11:45:32 -25.3 Dark Down 29.3 258.7 Low 11:30:32 - 12:00:32 -4606
DCO 11:45:30 -24.6 Dark Down 28.6 259.3 Low 11:30:30 - 12:00:30 -4620
Mohave Valley 11:45:33 -25.8 Dark Down 29.8 258.5 Low 11:30:33 - 12:00:33 -4635
Lake Havasu City 11:45:33 -25.6 Dark Down 29.7 258.9 Low 11:30:33 - 12:00:33 -4680
Wildwood 11:45:41 -29.1 Dark Down 33.2 256.3 Up 11:30:41 - 12:00:41 -4694
Parker 11:45:32 -25.6 Dark Down 29.7 259.1 Low 11:30:32 - 12:00:32 -4718
Idyllwild 11:45:37 -27.6 Dark Down 31.8 257.8 Up 11:30:37 - 12:00:37 -4747
Blythe 11:45:32 -25.9 Dark Down 30.1 259.2 Up 11:30:32 - 12:00:32 -4773
George/Scottsdale 11:45:28 -23.6 Dark Down 27.8 260.9 Low 11:30:28 - 12:00:28 -4776
Calipatria 11:45:33 -26.7 Dark Down 30.9 258.9 Up 11:30:33 - 12:00:33 -4821
Yuma 11:45:32 -26.0 Dark Down 30.3 259.7 Up 11:30:32 - 12:00:32 -4873

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 13RJ124, (2025/10/19 11:49UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:35:55.3 +16:30:29  0.8 38.14 114
68Omi Cet      02:19:20.8 -02:58:45  2.0 11.87 148
65Xi 1Cet      02:13:00.0 +08:50:48  4.4  2.51 149
PPM 145259     02:04:00.2 +08:05:41  8.1  0.22 152
13RJ124        02:03:12.5 +08:11:15 14.8       152
Positions are for J2000

Event circumstances last updated at 2020/11/04 22:07:12 UT

Marc W. Buie, Southwest Research Institute

RECON