RECON: TNO occultation with 01QX322

Event between 01QX322 and star GA1200:00391885 with event index number of 1441421

Geocentric closest approach at 2025/09/15 11:26:49 UTC

J2000 position of star is 02:24:02.1 +31:27:24
Equinox of date position of star is 02:25:11.2 +31:32:39
Stellar brightness G=15.9, use SENSEUP=128
Star is 52 degrees from the moon. Moon is 39% illuminated.
TNO apparent brightness V=22.7

[RECON map]
TNO is 46.1 AU from the Sun and 45.5 AU from the Earth.
The TNO is moving 15.3 km/sec on the sky relative to the star, or, 1.7 arcsec/hr.
The 1-sigma error in the time of the event is 1565 seconds.
The 1-sigma cross-track error in the shadow position is 4854 km.
The sky-plane scale is 33013.2 km/arcsec.

The TNO has an absolute magnitude Hv=6.0
Diameter=380.2 km assuming a 5% albedo -- 24.8 sec chord
Diameter=155.2 km assuming a 30% albedo -- 10.1 sec chord
Dynamical classification is SCATNEAR
 
 
 
 
 
 

Star training set for 01QX322, (2025/09/15 11:27UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:37:23.9 +16:33:33  0.8 33.44  28
Hamal          02:08:37.6 +23:34:59  2.0  8.82  58
13 Tri         02:30:19.5 +30:02:45  6.5  1.84  52
PPM 067345     02:28:32.8 +31:24:10  8.1  0.66  52
PPM 067303     02:26:41.2 +31:24:40  9.9  0.29  52
01QX322        02:25:33.5 +31:34:20 15.9        52
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 0.6 sigma about the mid-time.
The median site spacing is 24.7 km RECON observability=1.0 and success probability=8.5%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Kelowna 11:25:56 -20.3 Dark Up 69.9 207.6 Up 11:10:56 - 11:40:56 5596
Summerland 11:25:57 -20.6 Dark Up 70.2 207.3 Up 11:10:57 - 11:40:57 5564
Penticton 11:25:56 -20.6 Dark Up 70.3 207.7 Up 11:10:56 - 11:40:56 5557
Okanagan Falls 11:25:56 -20.7 Dark Up 70.4 207.9 Up 11:10:56 - 11:40:56 5537
Oliver 11:25:56 -20.8 Dark Up 70.6 208.1 Up 11:10:56 - 11:40:56 5520
Anarchist Mountain Observatory 11:25:55 -20.7 Dark Up 70.7 208.8 Up 11:10:55 - 11:40:55 5502
Oroville 11:25:55 -20.8 Dark Up 70.7 208.7 Up 11:10:55 - 11:40:55 5494
Tonasket 11:25:55 -20.9 Dark Up 70.9 209.1 Up 11:10:55 - 11:40:55 5469
Okanogan 11:25:55 -21.2 Dark Up 71.3 209.2 Up 11:10:55 - 11:40:55 5433
Brewster 11:25:56 -21.4 Dark Up 71.6 209.1 Up 11:10:56 - 11:40:56 5403
Manson/Chelan 11:25:58 -21.8 Dark Up 71.9 208.5 Up 11:10:58 - 11:40:58 5380
Entiat 11:25:59 -21.9 Dark Up 72.1 208.6 Up 11:10:59 - 11:40:59 5356
Wenatchee 11:25:59 -22.1 Dark Up 72.4 208.8 Up 11:10:59 - 11:40:59 5329
Ellensburg 11:25:59 -22.4 Dark Up 72.8 208.8 Up 11:10:59 - 11:40:59 5284
Yakima 11:25:59 -22.7 Dark Up 73.2 209.4 Up 11:10:59 - 11:40:59 5240
Toppenish/White Swan 11:25:58 -22.7 Dark Up 73.3 210.2 Up 11:10:58 - 11:40:58 5217
Pasco 11:25:52 -22.0 Dark Up 72.9 213.7 Up 11:10:52 - 11:40:52 5209
PNWRO 11:25:50 -22.0 Dark Up 73.1 214.8 Up 11:10:50 - 11:40:50 5184
George/Umatilla 11:25:52 -22.3 Dark Up 73.3 213.8 Up 11:10:52 - 11:40:52 5172
Goldendale 11:26:01 -23.2 Dark Up 73.9 210.0 Up 11:11:01 - 11:41:01 5157
The Dalles 11:26:01 -23.5 Dark Up 74.2 209.4 Up 11:11:01 - 11:41:01 5131
Maupin 11:26:00 -23.7 Dark Up 74.6 210.4 Up 11:11:00 - 11:41:00 5086
Madras/Culver 11:26:00 -24.0 Dark Up 75.0 211.3 Up 11:11:00 - 11:41:00 5027
Sisters 11:26:03 -24.5 Dark Up 75.5 210.6 Up 11:11:03 - 11:41:03 4990
Redmond 11:26:00 -24.2 Dark Up 75.4 211.9 Up 11:11:00 - 11:41:00 4988
Bend 11:26:01 -24.4 Dark Up 75.6 211.9 Up 11:11:01 - 11:41:01 4965
Oregon Observatory 11:26:02 -24.6 Dark Up 75.8 211.9 Up 11:11:02 - 11:41:02 4945
La Pine/Gilchrist 11:26:02 -24.7 Dark Up 76.0 212.1 Up 11:11:02 - 11:41:02 4923
North Lake 11:25:59 -24.6 Dark Up 76.1 214.9 Up 11:10:59 - 11:40:59 4878
Paisley 11:25:57 -24.6 Dark Up 76.4 217.3 Up 11:10:57 - 11:40:57 4819
Chiloquin 11:26:03 -25.5 Dark Up 77.1 213.5 Up 11:11:03 - 11:41:03 4801
Lakeview 11:25:55 -24.8 Dark Up 76.7 219.2 Up 11:10:55 - 11:40:55 4764
Klamath Falls 11:26:03 -25.6 Dark Up 77.3 214.6 Up 11:11:03 - 11:41:03 4764
Tulelake 11:26:01 -25.6 Dark Up 77.4 216.3 Up 11:11:01 - 11:41:01 4735
Cedarville 11:25:55 -25.0 Dark Up 77.1 221.6 Up 11:10:55 - 11:40:55 4693
Niwot 11:24:35 -15.3 AT Up 68.3 254.3 Up 11:09:35 - 11:39:35 4680
SwRI 11:24:35 -15.4 AT Up 68.4 254.4 Up 11:09:35 - 11:39:35 4667
Fall River/Burney 11:26:00 -26.0 Dark Up 78.1 219.1 Up 11:11:00 - 11:41:00 4636
Susanville 11:25:57 -25.8 Dark Up 78.2 223.6 Up 11:10:57 - 11:40:57 4569
Gimple 11:25:57 -26.1 Dark Up 78.5 223.8 Up 11:10:57 - 11:40:57 4538
Greenville 11:25:58 -26.2 Dark Up 78.6 223.5 Up 11:10:58 - 11:40:58 4538
Quincy 11:25:58 -26.3 Dark Up 78.7 224.2 Up 11:10:58 - 11:40:58 4516
Portola 11:25:55 -26.0 Dark Up 78.5 226.2 Up 11:10:55 - 11:40:55 4504
Reno 11:25:51 -25.7 Dark Up 78.4 229.2 Up 11:10:51 - 11:40:51 4477
Carson City 11:25:52 -25.8 Dark Up 78.6 230.6 Up 11:10:52 - 11:40:52 4438
Yerington 11:25:48 -25.5 Dark Up 78.3 233.2 Up 11:10:48 - 11:40:48 4419
Gardnerville 11:25:50 -25.9 Dark Up 78.7 231.7 Up 11:10:50 - 11:40:50 4411
Hawthorne 11:25:44 -25.4 Dark Up 78.3 236.5 Up 11:10:44 - 11:40:44 4371
Tonopah 11:25:36 -24.6 Dark Up 77.6 241.8 Up 11:10:36 - 11:40:36 4328
Lee Vining 11:25:47 -26.0 Dark Up 78.9 237.5 Up 11:10:47 - 11:40:47 4306
Bishop 11:25:43 -25.7 Dark Up 78.7 242.0 Up 11:10:43 - 11:40:43 4244
Beatty 11:25:33 -24.8 Dark Up 77.7 247.5 Up 11:10:33 - 11:40:33 4203
Indian Springs 11:25:27 -24.1 Dark Up 77.1 250.9 Up 11:10:27 - 11:40:27 4175
Lone Pine 11:25:40 -25.8 Dark Up 78.8 246.2 Up 11:10:40 - 11:40:40 4162
Henderson 11:25:22 -23.8 Dark Up 76.7 254.2 Up 11:10:22 - 11:40:22 4122
Patrick 11:25:15 -23.2 Dark Up 76.0 258.2 Up 11:10:15 - 11:40:15 4062
Searchlight/Boulder City 11:25:22 -24.0 Dark Up 76.8 256.6 Up 11:10:22 - 11:40:22 4059
Kingman/Dolan Springs 11:25:17 -23.5 Dark Up 76.2 258.8 Up 11:10:17 - 11:40:17 4036
DCO 11:25:11 -22.8 Dark Up 75.5 260.2 Up 11:10:11 - 11:40:11 4035
Laughlin/Bullhead City 11:25:19 -23.9 Dark Up 76.6 258.3 Up 11:10:19 - 11:40:19 4029
CPSLO 11:25:54 -28.2 Dark Up 81.2 246.8 Up 11:10:54 - 11:40:54 4006
Mohave Valley 11:25:19 -24.0 Dark Up 76.6 259.4 Up 11:10:19 - 11:40:19 3999
Lake Havasu City 11:25:18 -23.9 Dark Up 76.5 261.4 Up 11:10:18 - 11:40:18 3957
Parker 11:25:18 -24.0 Dark Up 76.5 262.8 Up 11:10:18 - 11:40:18 3919
Wildwood 11:25:42 -27.3 Dark Up 80.0 257.9 Up 11:10:42 - 11:40:42 3882
Blythe 11:25:18 -24.5 Dark Up 76.8 264.8 Up 11:10:18 - 11:40:18 3858
Idyllwild 11:25:31 -26.0 Dark Up 78.5 262.2 Up 11:10:31 - 11:40:31 3854
Calipatria 11:25:23 -25.4 Dark Up 77.6 266.2 Up 11:10:23 - 11:40:23 3796
Yuma 11:25:18 -24.8 Dark Up 76.9 268.7 Up 11:10:18 - 11:40:18 3756

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 01QX322, (2025/09/15 11:27UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:35:55.3 +16:30:30  0.8 33.44  28
Hamal          02:07:10.7 +23:27:42  2.0  8.82  58
13 Tri         02:28:48.4 +29:55:56  6.5  1.84  52
PPM 067345     02:27:01.2 +31:17:18  8.1  0.66  52
PPM 067303     02:25:09.7 +31:17:45  9.9  0.29  52
01QX322        02:24:02.1 +31:27:24 15.9        52
Positions are for J2000

Event circumstances last updated at 2019/06/08 12:57:46 UT

Marc W. Buie, Southwest Research Institute

RECON