RECON: TNO occultation with 69986

Event between (69986) 98WW24 and star GA1020:01739513 with event index number of 1149126

Geocentric closest approach at 2021/11/25 05:41:52 UTC

J2000 position of star is 06:22:46.1 +13:54:20
Equinox of date position of star is 06:23:59.9 +13:53:36
Stellar brightness G=14.7, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 34 degrees from the moon. Moon is 72% illuminated.
TNO apparent brightness V=23.8

[RECON map]
TNO is 35.4 AU from the Sun and 34.6 AU from the Earth.
The TNO is moving 20.8 km/sec on the sky relative to the star, or, 3.0 arcsec/hr.
The 1-sigma error in the time of the event is 325 seconds.
The 1-sigma cross-track error in the shadow position is 2631 km.
The sky-plane scale is 25087.6 km/arcsec.

The TNO has an absolute magnitude Hv=8.3
Diameter=131.8 km assuming a 5% albedo -- 6.3 sec chord
Diameter=53.8 km assuming a 30% albedo -- 2.6 sec chord
Dynamical classification is 3:2E
 
 
 
 
 
 

Star training set for 69986, (2021/11/25 05:42UT)
Object            RA         Dec     mag  sep  mel
Betelgeuse     05:56:21.5 +07:24:34  0.4  9.39  43
Alhena         06:38:58.6 +16:22:43  1.9  4.38  30
PPM 122243     06:19:20.4 +14:22:23  6.2  1.23  35
PPM 122389     06:24:47.6 +14:01:44  8.3  0.23  34
PPM 122371     06:24:05.3 +13:49:57  9.7  0.06  34
69986          06:24:00.7 +13:53:35 14.7        34
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 2.8 sigma about the mid-time.
The median site spacing is 20.5 km RECON observability=1.0 and success probability=0.9%
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 05:44:24 -52.3 Dark Up 26.9 100.8 Low 05:29:24 - 05:59:24 9738
Kelowna 05:44:26 -52.4 Dark Up 26.8 100.5 Low 05:29:26 - 05:59:26 9714
Peachland 05:44:26 -52.4 Dark Up 26.7 100.2 Low 05:29:26 - 05:59:26 9713
Summerland 05:44:27 -52.5 Dark Up 26.8 100.2 Low 05:29:27 - 05:59:27 9701
Victoria 05:44:36 -51.2 Dark Up 24.5 96.7 Low 05:29:36 - 05:59:36 9700
Penticton 05:44:27 -52.6 Dark Up 26.9 100.3 Low 05:29:27 - 05:59:27 9694
Oliver 05:44:28 -52.8 Dark Up 26.9 100.1 Low 05:29:28 - 05:59:28 9670
Anarchist Mountain Observatory 05:44:29 -53.0 Dark Up 27.1 100.2 Low 05:29:29 - 05:59:29 9655
Tonasket 05:44:31 -53.2 Dark Up 27.1 100.0 Low 05:29:31 - 05:59:31 9634
Okanogan 05:44:32 -53.3 Dark Up 27.0 99.7 Low 05:29:32 - 05:59:32 9614
Brewster 05:44:33 -53.4 Dark Up 27.0 99.4 Low 05:29:33 - 05:59:33 9599
Manson/Chelan 05:44:35 -53.3 Dark Up 26.8 99.0 Low 05:29:35 - 05:59:35 9591
Wenatchee 05:44:38 -53.5 Dark Up 26.7 98.6 Low 05:29:38 - 05:59:38 9561
Ellensburg 05:44:39 -53.7 Dark Up 26.6 98.3 Low 05:29:39 - 05:59:39 9536
Yakima 05:44:41 -53.9 Dark Up 26.7 98.1 Low 05:29:41 - 05:59:41 9507
Toppenish/White Swan 05:44:40 -54.1 Dark Up 26.8 98.1 Low 05:29:40 - 05:59:40 9488
Goldendale 05:44:44 -54.2 Dark Up 26.6 97.5 Low 05:29:44 - 05:59:44 9457
Pasco 05:44:39 -54.9 Dark Up 27.7 99.0 Low 05:29:39 - 05:59:39 9453
The Dalles 05:44:46 -54.1 Dark Up 26.4 97.1 Low 05:29:46 - 05:59:46 9448
PNWRO 05:44:40 -55.2 Dark Up 27.9 99.0 Low 05:29:40 - 05:59:40 9430
Maupin 05:44:47 -54.4 Dark Up 26.5 97.0 Low 05:29:47 - 05:59:47 9415
Sisters 05:44:50 -54.6 Dark Up 26.3 96.2 Low 05:29:50 - 05:59:50 9360
Redmond 05:44:50 -54.8 Dark Up 26.6 96.5 Low 05:29:50 - 05:59:50 9350
Bend 05:44:51 -54.8 Dark Up 26.5 96.3 Low 05:29:51 - 05:59:51 9337
Oregon Observatory 05:44:53 -54.9 Dark Up 26.4 96.1 Low 05:29:53 - 05:59:53 9327
La Pine/Gilchrist 05:44:53 -54.9 Dark Up 26.4 95.9 Low 05:29:53 - 05:59:53 9312
North Lake 05:44:55 -55.5 Dark Up 26.9 96.2 Low 05:29:55 - 05:59:55 9266
Chiloquin 05:44:58 -55.3 Dark Up 26.3 95.1 Low 05:29:58 - 05:59:58 9235
Paisley 05:44:55 -56.0 Dark Up 27.2 96.1 Low 05:29:55 - 05:59:55 9216
Klamath Falls 05:45:00 -55.5 Dark Up 26.4 95.0 Low 05:30:00 - 06:00:00 9207
Lakeview 05:44:58 -56.4 Dark Up 27.4 96.0 Low 05:29:58 - 05:59:58 9172
Cedarville 05:45:00 -56.9 Dark Up 27.6 95.8 Low 05:30:00 - 06:00:00 9117
Fall River/Burney 05:45:03 -56.3 Dark Up 26.8 94.7 Low 05:30:03 - 06:00:03 9106
Susanville 05:45:05 -57.1 Dark Up 27.4 94.9 Low 05:30:05 - 06:00:05 9039
Greenville 05:45:06 -57.0 Dark Up 27.2 94.6 Low 05:30:06 - 06:00:06 9023
Gimple 05:45:05 -57.1 Dark Up 27.3 94.6 Low 05:30:05 - 06:00:05 9021
Quincy 05:45:07 -57.1 Dark Up 27.2 94.5 Low 05:30:07 - 06:00:07 9007
Portola 05:45:07 -57.5 Dark Up 27.6 94.7 Low 05:30:07 - 06:00:07 8986
Reno 05:45:07 -58.1 Dark Up 28.1 95.0 Low 05:30:07 - 06:00:07 8949
Carson City 05:45:08 -58.2 Dark Up 28.2 94.9 Low 05:30:08 - 06:00:08 8919
Gardnerville 05:45:08 -58.4 Dark Up 28.2 94.8 Low 05:30:08 - 06:00:08 8898
Yerington 05:45:06 -58.8 Dark Up 28.7 95.2 Low 05:30:06 - 06:00:06 8888
Hawthorne 05:45:08 -59.3 Dark Up 29.1 95.3 Low 05:30:08 - 06:00:08 8837
Lee Vining 05:45:10 -59.3 Dark Up 28.8 94.7 Low 05:30:10 - 06:00:10 8802
Tonopah 05:45:07 -60.5 Dark Up 30.3 96.0 Up 05:30:07 - 06:00:07 8765
Bishop 05:45:12 -60.0 Dark Up 29.4 94.8 Low 05:30:12 - 06:00:12 8734
Dunrhomin 05:44:33 -66.4 Dark Up 38.9 106.2 Up 05:29:33 - 05:59:33 8673
Beatty 05:45:11 -61.4 Dark Up 30.8 95.6 Up 05:30:11 - 06:00:11 8656
CPSLO 05:45:22 -59.2 Dark Up 27.8 92.3 Low 05:30:22 - 06:00:22 8612
Indian Springs 05:45:10 -62.3 Dark Up 31.7 96.1 Up 05:30:10 - 06:00:10 8602
Henderson 05:45:10 -63.1 Dark Up 32.3 96.2 Up 05:30:10 - 06:00:10 8538
Wildwood 05:45:23 -61.2 Dark Up 29.5 92.9 Low 05:30:23 - 06:00:23 8456
Patrick 05:45:10 -64.2 Dark Up 33.2 96.5 Up 05:30:10 - 06:00:10 8456
Laughlin/Bullhead City 05:45:12 -63.8 Dark Up 32.7 95.9 Up 05:30:12 - 06:00:12 8452
Kingman/Dolan Springs 05:45:10 -64.1 Dark Up 33.1 96.3 Up 05:30:10 - 06:00:10 8441
Mohave Valley 05:45:13 -63.9 Dark Up 32.7 95.7 Up 05:30:13 - 06:00:13 8427
Lake Havasu City 05:45:14 -64.3 Dark Up 33.0 95.6 Up 05:30:14 - 06:00:14 8386
Idyllwild 05:45:20 -62.8 Dark Up 31.1 93.7 Up 05:30:20 - 06:00:20 8378
Parker 05:45:14 -64.4 Dark Up 33.0 95.4 Up 05:30:14 - 06:00:14 8354
Blythe 05:45:16 -64.4 Dark Up 32.9 94.9 Up 05:30:16 - 06:00:16 8314
Calipatria 05:45:21 -63.9 Dark Up 32.1 94.1 Up 05:30:21 - 06:00:21 8293
George/Scottsdale 05:45:11 -66.4 Dark Up 35.1 96.6 Up 05:30:11 - 06:00:11 8255
Yuma 05:45:20 -64.8 Dark Up 32.9 94.3 Up 05:30:20 - 06:00:20 8232

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 69986, (2021/11/25 05:42UT)
Object            RA         Dec     mag  sep  mel
Betelgeuse     05:55:10.3 +07:24:26  0.4  9.39  43
Alhena         06:37:42.8 +16:23:57  1.9  4.38  30
PPM 122243     06:18:05.6 +14:22:58  6.2  1.23  35
PPM 122389     06:23:32.9 +14:02:31  8.3  0.23  34
PPM 122371     06:22:50.8 +13:50:42  9.7  0.06  34
69986          06:22:46.1 +13:54:20 14.7        34
Positions are for J2000

Event circumstances last updated at 2021/08/30 01:17:24 UT

Marc W. Buie, Southwest Research Institute

RECON