RECON: TNO occultation with 69990

Event between (69990) 98WU31 and star GA1080:01881582 with event index number of 1252687

Geocentric closest approach at 2023/01/01 06:01:29 UTC

J2000 position of star is 06:20:41.9 +19:11:14
Equinox of date position of star is 06:22:02.4 +19:10:32
Stellar brightness G=16.6, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 58 degrees from the moon. Moon is 72% illuminated.
TNO apparent brightness V=23.8

[RECON map]
TNO is 36.3 AU from the Sun and 35.3 AU from the Earth.
The TNO is moving 25.1 km/sec on the sky relative to the star, or, 3.5 arcsec/hr.
The 1-sigma error in the time of the event is 316 seconds.
The 1-sigma cross-track error in the shadow position is 2020 km.
The sky-plane scale is 25605.4 km/arcsec.

The TNO has an absolute magnitude Hv=8.2
Diameter=144.5 km assuming a 5% albedo -- 5.5 sec chord
Diameter=59.0 km assuming a 30% albedo -- 2.3 sec chord
Dynamical classification is 3:2E
 
 
 
 
 
 

Star training set for 69990, (2023/01/01 06:01UT)
Object            RA         Dec     mag  sep  mel
Betelgeuse     05:56:25.1 +07:24:34  0.4 13.31  54
Alhena         06:39:02.4 +16:22:40  1.9  4.92  62
71 Ori         06:16:12.1 +19:08:48  5.6  1.38  57
PPM 122359     06:23:44.5 +19:21:29  8.3  0.44  59
69990          06:22:03.2 +19:10:31 16.6        58
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 29.9 km RECON observability=1.0 and success probability=13.3%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Sleaford 06:02:01 -58.4 Dark Up 56.2 162.9 Up 05:47:01 - 06:17:01 -2445
Kamloops 06:02:38 -53.6 Dark Up 53.1 139.7 Up 05:47:38 - 06:17:38 -2506
Kelowna 06:02:38 -54.6 Dark Up 54.1 140.3 Up 05:47:38 - 06:17:38 -2589
Peachland 06:02:38 -54.5 Dark Up 54.1 139.8 Up 05:47:38 - 06:17:38 -2598
Summerland 06:02:38 -54.6 Dark Up 54.2 139.8 Up 05:47:38 - 06:17:38 -2612
Penticton 06:02:38 -54.7 Dark Up 54.3 139.9 Up 05:47:38 - 06:17:38 -2620
Oliver 06:02:38 -54.9 Dark Up 54.6 139.6 Up 05:47:38 - 06:17:38 -2653
Anarchist Mountain Observatory 06:02:38 -55.1 Dark Up 54.8 139.7 Up 05:47:38 - 06:17:38 -2670
Victoria 06:02:51 -53.2 Dark Up 53.4 133.6 Up 05:47:51 - 06:17:51 -2683
Tonasket 06:02:38 -55.3 Dark Up 55.0 139.3 Up 05:47:38 - 06:17:38 -2700
Okanogan 06:02:38 -55.4 Dark Up 55.2 138.8 Up 05:47:38 - 06:17:38 -2731
Brewster 06:02:38 -55.5 Dark Up 55.3 138.2 Up 05:47:38 - 06:17:38 -2756
Manson/Chelan 06:02:38 -55.4 Dark Up 55.3 137.5 Up 05:47:38 - 06:17:38 -2774
Wenatchee 06:02:38 -55.5 Dark Up 55.6 136.8 Up 05:47:38 - 06:17:38 -2820
Ellensburg 06:02:38 -55.7 Dark Up 55.8 136.0 Up 05:47:38 - 06:17:38 -2860
Yakima 06:02:38 -55.9 Dark Up 56.1 135.6 Up 05:47:38 - 06:17:38 -2900
Toppenish/White Swan 06:02:38 -56.1 Dark Up 56.3 135.6 Up 05:47:38 - 06:17:38 -2922
PNWRO 06:02:38 -57.2 Dark Up 57.3 137.5 Up 05:47:38 - 06:17:38 -2966
Goldendale 06:02:38 -56.1 Dark Up 56.5 134.4 Up 05:47:38 - 06:17:38 -2975
The Dalles 06:02:48 -56.1 Dark Up 56.5 133.7 Up 05:47:48 - 06:17:48 -2985
Maupin 06:02:48 -56.3 Dark Up 56.8 133.4 Up 05:47:48 - 06:17:48 -3027
Sisters 06:02:51 -56.5 Dark Up 57.2 131.7 Up 05:47:51 - 06:17:51 -3110
Bend 06:02:51 -56.8 Dark Up 57.5 131.8 Up 05:47:51 - 06:17:51 -3136
Oregon Observatory 06:02:51 -56.8 Dark Up 57.5 131.4 Up 05:47:51 - 06:17:51 -3151
North Lake 06:02:50 -57.4 Dark Up 58.2 131.4 Up 05:47:50 - 06:17:50 -3220
Chiloquin 06:02:54 -57.1 Dark Up 58.1 129.2 Up 05:47:54 - 06:17:54 -3279
Klamath Falls 06:02:54 -57.3 Dark Up 58.4 128.9 Up 05:47:54 - 06:17:54 -3314
Lakeview 06:02:50 -58.3 Dark Up 59.2 130.9 Up 05:47:50 - 06:17:50 -3332
Cedarville 06:02:50 -58.7 Dark Up 59.7 130.3 Up 05:47:50 - 06:17:50 -3400
Fall River/Burney 06:02:54 -58.1 Dark Up 59.3 127.9 Up 05:47:54 - 06:17:54 -3437
Susanville 06:02:53 -58.8 Dark Up 60.2 128.1 Up 05:47:53 - 06:17:53 -3509
Greenville 06:02:54 -58.7 Dark Up 60.2 127.3 Up 05:47:54 - 06:17:54 -3534
Gimple 06:02:53 -58.8 Dark Up 60.2 127.4 Up 05:47:53 - 06:17:53 -3535
Quincy 06:02:54 -58.8 Dark Up 60.3 127.1 Up 05:47:54 - 06:17:54 -3555
Portola 06:02:53 -59.2 Dark Up 60.7 127.6 Up 05:47:53 - 06:17:53 -3572
Reno 06:02:51 -59.8 Dark Up 61.2 128.1 Up 05:47:51 - 06:17:51 -3606
Dunrhomin 06:02:03 -68.4 Dark Up 67.5 156.8 Up 05:47:03 - 06:17:03 -3616
CU-SBO 06:02:04 -68.5 Dark Up 67.7 156.3 Up 05:47:04 - 06:17:04 -3641
Carson City 06:02:52 -59.9 Dark Up 61.4 127.7 Up 05:47:52 - 06:17:52 -3643
Gardnerville 06:02:52 -60.1 Dark Up 61.6 127.4 Up 05:47:52 - 06:17:52 -3669
Yerington 06:02:50 -60.5 Dark Up 62.0 128.3 Up 05:47:50 - 06:17:50 -3669
Hawthorne 06:02:48 -61.0 Dark Up 62.6 128.4 Up 05:47:48 - 06:17:48 -3722
Lee Vining 06:02:51 -60.9 Dark Up 62.6 126.8 Up 05:47:51 - 06:17:51 -3776
Tonopah 06:02:38 -62.2 Dark Up 63.7 129.9 Up 05:47:38 - 06:17:38 -3785
Bishop 06:02:49 -61.7 Dark Up 63.4 127.0 Up 05:47:49 - 06:17:49 -3845
Beatty 06:02:38 -63.0 Dark Up 64.7 128.8 Up 05:47:38 - 06:17:38 -3910
Indian Springs 06:02:38 -63.9 Dark Up 65.6 130.1 Up 05:47:38 - 06:17:38 -3950
Henderson 06:02:38 -64.7 Dark Up 66.4 130.4 Up 05:47:38 - 06:17:38 -4011
Patrick 06:02:35 -65.7 Dark Up 67.4 131.3 Up 05:47:35 - 06:17:35 -4085
Laughlin/Bullhead City 06:02:38 -65.3 Dark Up 67.2 129.6 Up 05:47:38 - 06:17:38 -4107
Kingman/Dolan Springs 06:02:36 -65.7 Dark Up 67.5 130.6 Up 05:47:36 - 06:17:36 -4108
Mohave Valley 06:02:38 -65.4 Dark Up 67.3 129.1 Up 05:47:38 - 06:17:38 -4136
Lake Havasu City 06:02:38 -65.8 Dark Up 67.8 128.8 Up 05:47:38 - 06:17:38 -4180
Wildwood 06:02:52 -62.6 Dark Up 65.1 121.1 Up 05:47:52 - 06:17:52 -4188
Parker 06:02:38 -65.9 Dark Up 68.0 128.2 Up 05:47:38 - 06:17:38 -4218
Idyllwild 06:02:38 -64.1 Dark Up 66.6 123.2 Up 05:47:38 - 06:17:38 -4247
George/Scottsdale 06:02:29 -67.9 Dark Up 69.8 132.0 Up 05:47:29 - 06:17:29 -4279
Calipatria 06:02:38 -65.3 Dark Up 67.8 124.0 Up 05:47:38 - 06:17:38 -4319
Yuma 06:02:38 -66.1 Dark Up 68.6 124.6 Up 05:47:38 - 06:17:38 -4370

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 69990, (2023/01/01 06:01UT)
Object            RA         Dec     mag  sep  mel
Betelgeuse     05:55:10.3 +07:24:26  0.4 13.31  54
Alhena         06:37:42.8 +16:23:57  1.9  4.92  62
71 Ori         06:14:50.7 +19:09:19  5.6  1.38  57
PPM 122359     06:22:23.0 +19:22:15  8.3  0.44  59
69990          06:20:41.9 +19:11:14 16.6        58
Positions are for J2000

Event circumstances last updated at 2022/10/03 04:15:15 UT

Marc W. Buie, Southwest Research Institute

RECON