RECON: TNO occultation with 523741

Event between (523741) 14TY85 and star GA1220:01129729 with event index number of 1654317

Geocentric closest approach at 2026/12/31 07:38:11 UTC

J2000 position of star is 04:37:56.3 +32:34:18
Equinox of date position of star is 04:39:13.9 +32:36:37
Stellar brightness G=15.1, use SENSEUP=128
Star is 124 degrees from the moon. Moon is 45% illuminated.
TNO apparent brightness V=21.8

[RECON map]
TNO is 33.0 AU from the Sun and 32.2 AU from the Earth.
The TNO is moving 21.6 km/sec on the sky relative to the star, or, 3.3 arcsec/hr.
The 1-sigma error in the time of the event is 486 seconds.
The 1-sigma cross-track error in the shadow position is 5053 km.
The sky-plane scale is 23317.6 km/arcsec.

The TNO has an absolute magnitude Hv=6.6
Diameter=288.4 km assuming a 5% albedo -- 13.3 sec chord
Diameter=117.7 km assuming a 30% albedo -- 5.4 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 

Star training set for 523741, (2026/12/31 07:38UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:37:28.4 +16:33:42  0.8 16.07 125
3Iot Aur       04:58:45.4 +33:12:22  2.7  4.04 120
PPM 069605     04:45:33.4 +32:54:49  6.5  1.27 122
PPM 069521     04:37:15.7 +33:19:34  8.4  0.87 124
PPM 069562     04:40:29.6 +32:43:01  9.6  0.19 123
523741         04:39:41.0 +32:37:25 15.1       123
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 1.9 sigma about the mid-time.
The median site spacing is 26.5 km RECON observability=1.0 and success probability=8.3%
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 07:36:36 -62.5 Dark Down 64.4 235.9 Up 07:21:36 - 07:51:36 -3927
Kelowna 07:36:36 -62.8 Dark Down 64.7 236.3 Up 07:21:36 - 07:51:36 -3968
Summerland 07:36:37 -63.0 Dark Down 65.0 236.5 Up 07:21:37 - 07:51:37 -3997
Penticton 07:36:36 -63.1 Dark Down 64.9 236.7 Up 07:21:36 - 07:51:36 -4004
Oliver 07:36:36 -63.5 Dark Down 65.1 237.4 Up 07:21:36 - 07:51:36 -4042
Anarchist Mountain Observatory 07:36:35 -63.7 Dark Down 65.1 238.0 Up 07:21:35 - 07:51:35 -4059
Tonasket 07:36:36 -63.9 Dark Down 65.3 238.4 Up 07:21:36 - 07:51:36 -4093
Victoria 07:36:48 -63.4 Dark Down 67.6 232.5 Up 07:21:48 - 07:51:48 -4124
Okanogan 07:36:35 -64.3 Dark Down 65.6 238.8 Up 07:21:35 - 07:51:35 -4130
Brewster 07:36:36 -64.5 Dark Down 65.8 239.1 Up 07:21:36 - 07:51:36 -4160
Manson/Chelan 07:36:37 -64.6 Dark Down 66.1 238.9 Up 07:21:37 - 07:51:37 -4184
Entiat 07:36:37 -64.8 Dark Down 66.3 239.2 Up 07:21:37 - 07:51:37 -4207
Wenatchee 07:36:37 -65.1 Dark Down 66.5 239.6 Up 07:21:37 - 07:51:37 -4235
Ellensburg 07:36:37 -65.4 Dark Down 66.8 240.1 Up 07:21:37 - 07:51:37 -4281
Yakima 07:36:37 -65.8 Dark Down 67.0 240.9 Up 07:21:37 - 07:51:37 -4325
Toppenish/White Swan 07:36:36 -66.0 Dark Down 67.0 241.6 Up 07:21:36 - 07:51:36 -4348
Pasco 07:36:32 -66.4 Dark Down 66.3 243.7 Up 07:21:32 - 07:51:32 -4356
PNWRO 07:36:32 -66.7 Dark Down 66.3 244.5 Up 07:21:32 - 07:51:32 -4381
Goldendale 07:36:38 -66.5 Dark Down 67.6 242.1 Up 07:21:38 - 07:51:38 -4409
The Dalles 07:36:39 -66.6 Dark Down 67.9 242.0 Up 07:21:39 - 07:51:39 -4435
Maupin 07:36:38 -67.0 Dark Down 68.0 243.1 Up 07:21:38 - 07:51:38 -4480
Sisters 07:36:40 -67.8 Dark Down 68.7 244.4 Up 07:21:40 - 07:51:40 -4578
Redmond 07:36:38 -67.9 Dark Down 68.5 245.0 Up 07:21:38 - 07:51:38 -4579
Bend 07:36:39 -68.1 Dark Down 68.7 245.3 Up 07:21:39 - 07:51:39 -4603
Oregon Observatory 07:36:39 -68.2 Dark Down 68.8 245.5 Up 07:21:39 - 07:51:39 -4622
La Pine/Gilchrist 07:36:39 -68.4 Dark Down 68.9 245.9 Up 07:21:39 - 07:51:39 -4645
North Lake 07:36:37 -68.9 Dark Down 68.7 247.8 Up 07:21:37 - 07:51:37 -4690
Paisley 07:36:35 -69.5 Dark Down 68.7 249.6 Up 07:21:35 - 07:51:35 -4750
Lakeview 07:36:34 -70.0 Dark Down 68.7 251.1 Up 07:21:34 - 07:51:34 -4805
Klamath Falls 07:36:39 -69.6 Dark Down 69.7 249.1 Up 07:21:39 - 07:51:39 -4805
Cedarville 07:36:33 -70.7 Dark Down 68.8 252.9 Up 07:21:33 - 07:51:33 -4876
Niwot 07:35:41 -71.7 Dark Down 57.9 268.9 Up 07:20:41 - 07:50:41 -4878
SwRI 07:35:41 -71.8 Dark Down 58.0 269.0 Up 07:20:41 - 07:50:41 -4891
Fall River/Burney 07:36:38 -70.8 Dark Down 69.8 252.6 Up 07:21:38 - 07:51:38 -4934
Susanville 07:36:34 -71.6 Dark Down 69.4 255.1 Up 07:21:34 - 07:51:34 -5001
Gimple 07:36:35 -71.8 Dark Down 69.7 255.6 Up 07:21:35 - 07:51:35 -5032
Greenville 07:36:36 -71.8 Dark Down 69.7 255.5 Up 07:21:36 - 07:51:36 -5032
Quincy 07:36:36 -72.0 Dark Down 69.8 256.0 Up 07:21:36 - 07:51:36 -5055
Portola 07:36:35 -72.2 Dark Down 69.4 256.9 Up 07:21:35 - 07:51:35 -5067
Reno 07:36:32 -72.7 Dark Down 69.0 258.3 Up 07:21:32 - 07:51:32 -5093
Carson City 07:36:30 -73.0 Dark Down 69.1 259.2 Up 07:21:30 - 07:51:30 -5133
Yerington 07:36:29 -73.4 Dark Down 68.6 260.3 Up 07:21:29 - 07:51:29 -5151
Gardnerville 07:36:31 -73.3 Dark Down 69.1 259.9 Up 07:21:31 - 07:51:31 -5159
Hawthorne 07:36:27 -73.9 Dark Down 68.3 262.0 Up 07:21:27 - 07:51:27 -5199
Tonopah 07:36:21 -74.7 Dark Down 67.3 264.3 Up 07:21:21 - 07:51:21 -5242
Lee Vining 07:36:28 -74.3 Dark Down 68.8 263.0 Up 07:21:28 - 07:51:28 -5265
Bishop 07:36:25 -75.1 Dark Down 68.3 265.1 Up 07:21:25 - 07:51:25 -5327
Beatty 07:36:19 -75.9 Dark Down 67.0 267.4 Up 07:21:19 - 07:51:19 -5367
Indian Springs 07:36:14 -76.4 Dark Down 66.2 268.8 Up 07:21:14 - 07:51:14 -5394
Henderson 07:36:12 -77.0 Dark Down 65.6 270.4 Up 07:21:12 - 07:51:12 -5447
Patrick 07:36:07 -77.7 Dark Down 64.7 272.4 Up 07:21:07 - 07:51:07 -5506
Searchlight/Boulder City 07:36:11 -77.5 Dark Down 65.6 271.7 Up 07:21:11 - 07:51:11 -5510
Kingman/Dolan Springs 07:36:08 -77.9 Dark Down 64.9 272.8 Up 07:21:08 - 07:51:08 -5532
DCO 07:36:04 -78.0 Dark Down 64.1 273.4 Up 07:21:04 - 07:51:04 -5532
Laughlin/Bullhead City 07:36:10 -77.9 Dark Down 65.3 272.5 Up 07:21:10 - 07:51:10 -5540
CPSLO 07:36:33 -76.3 Dark Down 70.2 268.9 Up 07:21:33 - 07:51:33 -5566
Mohave Valley 07:36:10 -78.1 Dark Down 65.3 273.1 Up 07:21:10 - 07:51:10 -5570
Lake Havasu City 07:36:08 -78.6 Dark Down 65.0 274.1 Up 07:21:08 - 07:51:08 -5612
Parker 07:36:08 -78.9 Dark Down 65.0 274.9 Up 07:21:08 - 07:51:08 -5650
George/Scottsdale 07:35:59 -79.3 Dark Down 62.9 276.7 Up 07:20:59 - 07:50:59 -5671
Wildwood 07:36:25 -78.1 Dark Down 68.5 273.2 Up 07:21:25 - 07:51:25 -5690
Blythe 07:36:09 -79.4 Dark Down 65.2 275.9 Up 07:21:09 - 07:51:09 -5711
Idyllwild 07:36:17 -79.0 Dark Down 66.9 274.8 Up 07:21:17 - 07:51:17 -5716
Calipatria 07:36:12 -79.8 Dark Down 65.9 276.6 Up 07:21:12 - 07:51:12 -5774
Yuma 07:36:09 -80.3 Dark Down 65.1 277.9 Up 07:21:09 - 07:51:09 -5813

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 523741, (2026/12/31 07:38UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:35:55.3 +16:30:30  0.8 16.07 125
3Iot Aur       04:56:59.6 +33:09:58  2.7  4.04 120
PPM 069605     04:43:48.2 +32:51:55  6.5  1.27 122
PPM 069521     04:35:30.5 +33:16:21  8.4  0.87 124
PPM 069562     04:38:44.8 +32:39:55  9.6  0.19 123
523741         04:37:56.3 +32:34:18 15.1       124
Positions are for J2000

Event circumstances last updated at 2020/01/02 23:26:05 UT

Marc W. Buie, Southwest Research Institute

RECON