RECON: TNO occultation with 119979

Event between (119979) 02WC19 and star GA1100:02332352 with event index number of 1466799

Geocentric closest approach at 2025/11/15 05:40:27 UTC

J2000 position of star is 06:41:18.0 +21:16:14
Equinox of date position of star is 06:42:29.6 +21:15:01
Stellar brightness G=14.5, use SENSEUP=128
Star is 78 degrees from the moon. Moon is 22% illuminated.
TNO apparent brightness V=20.7

[RECON map]
TNO is 38.9 AU from the Sun and 38.2 AU from the Earth.
The TNO is moving 15.8 km/sec on the sky relative to the star, or, 2.1 arcsec/hr.
The 1-sigma error in the time of the event is 928 seconds.
The 1-sigma cross-track error in the shadow position is 3318 km.
The sky-plane scale is 27690.7 km/arcsec.

The TNO has an absolute magnitude Hv=4.7
Diameter=691.9 km assuming a 5% albedo -- 43.9 sec chord
Diameter=282.4 km assuming a 30% albedo -- 17.9 sec chord
Dynamical classification is 2:1E
 
 
 
 
 
 

Star training set for 119979, (2025/11/15 05:40UT)
Object            RA         Dec     mag  sep  mel
Pollux         07:46:54.0 +27:57:42  1.1 16.01  65
Alhena         06:39:12.4 +16:22:30  1.9  4.94  79
PPM 096308     06:40:38.6 +22:00:21  6.0  0.92  79
PPM 096360     06:42:15.2 +20:54:49  8.4  0.36  78
PPM 096388     06:43:20.8 +21:09:37  9.0  0.14  78
PPM 096381     06:43:06.7 +21:21:12 11.0  0.13  78
119979         06:42:50.8 +21:14:39 14.5        78
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 1.0 sigma about the mid-time.
The median site spacing is 20.8 km RECON observability=1.0 and success probability=14.3%
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 05:45:02 -50.7 Dark Down 23.2 84.2 Low 05:30:02 - 06:00:02 940
Kelowna 05:45:05 -50.9 Dark Down 23.1 83.9 Low 05:30:05 - 06:00:05 914
Victoria 05:45:14 -49.8 Dark Down 20.4 80.6 Low 05:30:14 - 06:00:14 906
Summerland 05:45:07 -51.0 Dark Down 23.0 83.7 Low 05:30:07 - 06:00:07 898
Penticton 05:45:07 -51.1 Dark Down 23.0 83.7 Low 05:30:07 - 06:00:07 889
Oliver 05:45:08 -51.3 Dark Down 23.0 83.6 Low 05:30:08 - 06:00:08 861
Anarchist Mountain Observatory 05:45:09 -51.5 Dark Down 23.1 83.7 Low 05:30:09 - 06:00:09 843
Tonasket 05:45:10 -51.7 Dark Down 23.0 83.5 Low 05:30:10 - 06:00:10 819
Okanogan 05:45:12 -51.8 Dark Down 22.9 83.2 Low 05:30:12 - 06:00:12 796
Brewster 05:45:13 -51.9 Dark Down 22.7 83.0 Low 05:30:13 - 06:00:13 779
Manson/Chelan 05:45:15 -51.9 Dark Down 22.5 82.6 Low 05:30:15 - 06:00:15 771
Entiat 05:45:16 -52.0 Dark Down 22.4 82.5 Low 05:30:16 - 06:00:16 755
Wenatchee 05:45:17 -52.1 Dark Down 22.3 82.3 Low 05:30:17 - 06:00:17 737
Ellensburg 05:45:20 -52.2 Dark Down 22.1 82.0 Low 05:30:20 - 06:00:20 709
Yakima 05:45:21 -52.5 Dark Down 22.0 81.8 Low 05:30:21 - 06:00:21 675
Toppenish/White Swan 05:45:22 -52.7 Dark Down 22.1 81.9 Low 05:30:22 - 06:00:22 653
Goldendale 05:45:25 -52.8 Dark Down 21.7 81.4 Low 05:30:25 - 06:00:25 618
Pasco 05:45:22 -53.5 Dark Down 23.0 82.7 Low 05:30:22 - 06:00:22 609
The Dalles 05:45:26 -52.8 Dark Down 21.5 81.0 Low 05:30:26 - 06:00:26 609
PNWRO 05:45:22 -53.8 Dark Down 23.1 82.8 Low 05:30:22 - 06:00:22 583
Maupin 05:45:28 -53.1 Dark Down 21.5 81.0 Low 05:30:28 - 06:00:28 571
Sisters 05:45:33 -53.3 Dark Down 21.0 80.3 Low 05:30:33 - 06:00:33 511
Redmond 05:45:33 -53.5 Dark Down 21.3 80.6 Low 05:30:33 - 06:00:33 497
Bend 05:45:33 -53.6 Dark Down 21.1 80.4 Low 05:30:33 - 06:00:33 483
Oregon Observatory 05:45:34 -53.6 Dark Down 21.0 80.2 Low 05:30:34 - 06:00:34 472
La Pine/Gilchrist 05:45:35 -53.7 Dark Down 21.0 80.1 Low 05:30:35 - 06:00:35 456
North Lake 05:45:37 -54.3 Dark Down 21.3 80.3 Low 05:30:37 - 06:00:37 402
Paisley 05:45:39 -54.8 Dark Down 21.5 80.4 Low 05:30:39 - 06:00:39 344
Klamath Falls 05:45:42 -54.3 Dark Down 20.5 79.4 Low 05:30:42 - 06:00:42 338
Lakeview 05:45:40 -55.2 Dark Down 21.5 80.3 Low 05:30:40 - 06:00:40 295
Cedarville 05:45:43 -55.7 Dark Down 21.6 80.2 Low 05:30:43 - 06:00:43 232
Fall River/Burney 05:45:46 -55.2 Dark Down 20.6 79.2 Low 05:30:46 - 06:00:46 224
Susanville 05:45:48 -56.0 Dark Down 21.0 79.5 Low 05:30:48 - 06:00:48 147
Greenville 05:45:49 -56.0 Dark Down 20.8 79.2 Low 05:30:49 - 06:00:49 131
Gimple 05:45:49 -56.0 Dark Down 20.8 79.2 Low 05:30:49 - 06:00:49 128
Quincy 05:45:50 -56.1 Dark Down 20.7 79.1 Low 05:30:50 - 06:00:50 113
Portola 05:45:50 -56.4 Dark Down 21.1 79.3 Low 05:30:50 - 06:00:50 87
Reno 05:45:51 -57.0 Dark Down 21.5 79.6 Low 05:30:51 - 06:00:51 45
Carson City 05:45:52 -57.2 Dark Down 21.5 79.5 Low 05:30:52 - 06:00:52 11
Gardnerville 05:45:53 -57.4 Dark Down 21.5 79.4 Low 05:30:53 - 06:00:53 -12
Yerington 05:45:52 -57.7 Dark Down 21.9 79.8 Low 05:30:52 - 06:00:52 -25
Hawthorne 05:45:53 -58.3 Dark Down 22.2 79.9 Low 05:30:53 - 06:00:53 -83
Lee Vining 05:45:56 -58.3 Dark Down 21.8 79.4 Low 05:30:56 - 06:00:56 -120
Tonopah 05:45:53 -59.5 Dark Down 23.3 80.5 Low 05:30:53 - 06:00:53 -167
Bishop 05:45:57 -59.1 Dark Down 22.2 79.6 Low 05:30:57 - 06:00:57 -197
Beatty 05:45:56 -60.5 Dark Down 23.4 80.3 Low 05:30:56 - 06:00:56 -289
Niwot 05:45:22 -64.9 Dark Down 32.7 88.7 Up 05:30:22 - 06:00:22 -299
SwRI 05:45:23 -64.9 Dark Down 32.6 88.5 Up 05:30:23 - 06:00:23 -307
CPSLO 05:46:07 -58.4 Dark Down 20.1 77.6 Low 05:31:07 - 06:01:07 -321
Indian Springs 05:45:56 -61.4 Dark Down 24.2 80.7 Low 05:30:56 - 06:00:56 -351
Henderson 05:45:56 -62.1 Dark Down 24.7 80.8 Low 05:30:56 - 06:00:56 -422
Searchlight/Boulder City 05:45:59 -62.5 Dark Down 24.7 80.6 Low 05:30:59 - 06:00:59 -479
Wildwood 05:46:09 -60.5 Dark Down 21.5 78.2 Low 05:31:09 - 06:01:09 -499
Patrick 05:45:57 -63.2 Dark Down 25.5 81.1 Low 05:30:57 - 06:00:57 -515
Laughlin/Bullhead City 05:45:59 -62.9 Dark Down 24.9 80.7 Low 05:30:59 - 06:00:59 -518
Kingman/Dolan Springs 05:45:58 -63.2 Dark Down 25.3 80.9 Low 05:30:58 - 06:00:58 -531
Mohave Valley 05:46:00 -63.0 Dark Down 24.9 80.5 Low 05:31:00 - 06:01:00 -544
DCO 05:45:57 -63.9 Dark Down 26.0 81.4 Low 05:30:57 - 06:00:57 -565
Lake Havasu City 05:46:00 -63.4 Dark Down 25.0 80.5 Low 05:31:00 - 06:01:00 -590
Idyllwild 05:46:07 -62.0 Dark Down 22.9 79.0 Low 05:31:07 - 06:01:07 -591
Parker 05:46:02 -63.6 Dark Down 25.0 80.3 Low 05:31:02 - 06:01:02 -625
Blythe 05:46:04 -63.7 Dark Down 24.6 80.0 Low 05:31:04 - 06:01:04 -667
Calipatria 05:46:07 -63.2 Dark Down 23.8 79.3 Low 05:31:07 - 06:01:07 -687
George/Scottsdale 05:45:58 -65.5 Dark Down 26.9 81.3 Low 05:30:58 - 06:00:58 -738
Yuma 05:46:07 -64.1 Dark Down 24.5 79.5 Low 05:31:07 - 06:01:07 -756

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 119979, (2025/11/15 05:40UT)
Object            RA         Dec     mag  sep  mel
Pollux         07:45:18.0 +28:01:33  1.1 16.01  65
Alhena         06:37:42.8 +16:23:57  1.9  4.94  79
PPM 096308     06:39:05.3 +22:01:51  6.0  0.92  79
PPM 096360     06:40:42.6 +20:56:23  8.4  0.36  78
PPM 096388     06:41:48.0 +21:11:13  9.0  0.14  78
PPM 096381     06:41:33.9 +21:22:47 11.0  0.13  78
119979         06:41:18.0 +21:16:14 14.5        78
Positions are for J2000

Event circumstances last updated at 2019/12/10 23:15:20 UT

Marc W. Buie, Southwest Research Institute

RECON