RECON: TNO occultation with 123509

Event between (123509) 00WK183 and star GA1100:01649454 with event index number of 1032859

Geocentric closest approach at 2021/01/26 06:50:40 UTC

J2000 position of star is 05:59:45.1 +21:26:22
Equinox of date position of star is 06:00:53.8 +21:26:22
Stellar brightness G=12.0, use SENSEUP=16
Star is 7 degrees from the moon. Moon is 93% illuminated.
TNO apparent brightness V=22.9

[RECON map]
TNO is 42.6 AU from the Sun and 41.8 AU from the Earth.
The TNO is moving 19.8 km/sec on the sky relative to the star, or, 2.4 arcsec/hr.
The 1-sigma error in the time of the event is 347 seconds.
The 1-sigma cross-track error in the shadow position is 2042 km.
The sky-plane scale is 30308.7 km/arcsec.

The TNO has an absolute magnitude Hv=6.6
Diameter=288.4 km assuming a 5% albedo -- 14.5 sec chord
Diameter=117.7 km assuming a 30% albedo -- 5.9 sec chord
Dynamical classification is CLASSICAL
 
 
 
 
 
 

Star training set for 123509, (2021/01/26 06:51UT)
Object            RA         Dec     mag  sep  mel
Betelgeuse     05:56:18.8 +07:24:33  0.4 14.08  19
Alhena         06:38:55.7 +16:22:46  1.9 10.29   9
PPM 095249     06:02:58.0 +22:23:59  6.2  1.06   6
PPM 095198     06:00:55.5 +21:36:14  6.7  0.17   7
123509         06:01:01.0 +21:26:21 12.0         7
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 2.6 sigma about the mid-time.
The median site spacing is 24.2 km RECON observability=1.0 and success probability=9.7%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Kelowna 06:49:40 -54.9 Dark Up 57.9 214.5 Up 06:34:40 - 07:04:40 -3033
Summerland 06:49:41 -54.8 Dark Up 58.0 214.0 Up 06:34:41 - 07:04:41 -3041
Penticton 06:49:40 -55.1 Dark Up 58.2 214.6 Up 06:34:40 - 07:04:40 -3070
Okanagan Falls 06:49:40 -55.2 Dark Up 58.4 214.7 Up 06:34:40 - 07:04:40 -3088
Oliver 06:49:39 -55.4 Dark Up 58.5 214.9 Up 06:34:39 - 07:04:39 -3103
Anarchist Mountain Observatory 06:49:38 -55.6 Dark Up 58.6 215.4 Up 06:34:38 - 07:04:38 -3118
Oroville 06:49:38 -55.6 Dark Up 58.7 215.3 Up 06:34:38 - 07:04:38 -3126
Tonasket 06:49:38 -55.8 Dark Up 58.9 215.5 Up 06:34:38 - 07:04:38 -3148
Okanogan 06:49:38 -56.0 Dark Up 59.2 215.6 Up 06:34:38 - 07:04:38 -3182
Brewster 06:49:38 -56.2 Dark Up 59.5 215.5 Up 06:34:38 - 07:04:38 -3211
Manson/Chelan 06:49:39 -56.2 Dark Up 59.8 215.1 Up 06:34:39 - 07:04:39 -3235
Entiat 06:49:39 -56.3 Dark Up 60.0 215.2 Up 06:34:39 - 07:04:39 -3257
Wenatchee 06:49:39 -56.5 Dark Up 60.3 215.3 Up 06:34:39 - 07:04:39 -3283
Ellensburg 06:49:39 -56.7 Dark Up 60.7 215.4 Up 06:34:39 - 07:04:39 -3326
Yakima 06:49:39 -57.0 Dark Up 61.0 215.8 Up 06:34:39 - 07:04:39 -3366
Pasco 06:49:33 -57.9 Dark Up 60.7 218.6 Up 06:34:33 - 07:04:33 -3384
Toppenish/White Swan 06:49:38 -57.3 Dark Up 61.1 216.3 Up 06:34:38 - 07:04:38 -3386
PNWRO 06:49:32 -58.2 Dark Up 60.8 219.2 Up 06:34:32 - 07:04:32 -3405
George/Umatilla 06:49:33 -58.1 Dark Up 61.1 218.6 Up 06:34:33 - 07:04:33 -3419
Goldendale 06:49:39 -57.5 Dark Up 61.8 216.1 Up 06:34:39 - 07:04:39 -3445
The Dalles 06:49:40 -57.5 Dark Up 62.1 215.7 Up 06:34:40 - 07:04:40 -3471
Maupin 06:49:39 -57.9 Dark Up 62.4 216.4 Up 06:34:39 - 07:04:39 -3512
Madras/Culver 06:49:39 -58.3 Dark Up 62.8 216.9 Up 06:34:39 - 07:04:39 -3567
Redmond 06:49:38 -58.5 Dark Up 63.2 217.3 Up 06:34:38 - 07:04:38 -3603
Sisters 06:49:40 -58.3 Dark Up 63.3 216.5 Up 06:34:40 - 07:04:40 -3605
Bend 06:49:38 -58.6 Dark Up 63.4 217.3 Up 06:34:38 - 07:04:38 -3626
Oregon Observatory 06:49:39 -58.7 Dark Up 63.6 217.2 Up 06:34:39 - 07:04:39 -3645
La Pine/Gilchrist 06:49:39 -58.8 Dark Up 63.8 217.4 Up 06:34:39 - 07:04:39 -3666
North Lake 06:49:36 -59.4 Dark Up 63.8 219.0 Up 06:34:36 - 07:04:36 -3704
Paisley 06:49:34 -60.0 Dark Up 64.1 220.4 Up 06:34:34 - 07:04:34 -3756
Chiloquin 06:49:39 -59.4 Dark Up 64.8 218.1 Up 06:34:39 - 07:04:39 -3783
Niwot 06:48:33 -67.9 Dark Up 56.5 246.0 Up 06:33:33 - 07:03:33 -3785
SwRI 06:48:33 -68.0 Dark Up 56.6 246.1 Up 06:33:33 - 07:03:33 -3797
Lakeview 06:49:32 -60.4 Dark Up 64.4 221.4 Up 06:34:32 - 07:04:32 -3805
Klamath Falls 06:49:38 -59.7 Dark Up 65.0 218.7 Up 06:34:38 - 07:04:38 -3817
Tulelake 06:49:37 -60.0 Dark Up 65.1 219.7 Up 06:34:37 - 07:04:37 -3841
Cedarville 06:49:31 -61.0 Dark Up 64.8 222.7 Up 06:34:31 - 07:04:31 -3870
Fall River/Burney 06:49:35 -60.7 Dark Up 65.8 221.1 Up 06:34:35 - 07:04:35 -3934
Susanville 06:49:32 -61.5 Dark Up 65.9 223.4 Up 06:34:32 - 07:04:32 -3990
Gimple 06:49:32 -61.6 Dark Up 66.2 223.5 Up 06:34:32 - 07:04:32 -4021
Greenville 06:49:32 -61.5 Dark Up 66.2 223.3 Up 06:34:32 - 07:04:32 -4022
Quincy 06:49:32 -61.7 Dark Up 66.4 223.6 Up 06:34:32 - 07:04:32 -4043
Portola 06:49:30 -62.0 Dark Up 66.2 224.7 Up 06:34:30 - 07:04:30 -4050
Reno 06:49:27 -62.6 Dark Up 66.0 226.3 Up 06:34:27 - 07:04:27 -4070
Carson City 06:49:27 -62.8 Dark Up 66.3 227.0 Up 06:34:27 - 07:04:27 -4107
Yerington 06:49:24 -63.3 Dark Up 66.0 228.4 Up 06:34:24 - 07:04:24 -4120
Gardnerville 06:49:26 -63.0 Dark Up 66.4 227.4 Up 06:34:26 - 07:04:26 -4132
Hawthorne 06:49:22 -63.9 Dark Up 66.0 230.1 Up 06:34:22 - 07:04:22 -4161
Tonopah 06:49:15 -65.0 Dark Up 65.5 233.3 Up 06:34:15 - 07:04:15 -4191
Lee Vining 06:49:22 -64.0 Dark Up 66.7 230.3 Up 06:34:22 - 07:04:22 -4226
Bishop 06:49:19 -64.9 Dark Up 66.6 232.6 Up 06:34:19 - 07:04:19 -4279
Beatty 06:49:11 -66.1 Dark Up 65.9 236.1 Up 06:34:11 - 07:04:11 -4305
Indian Springs 06:49:06 -66.9 Dark Up 65.3 238.4 Up 06:34:06 - 07:04:06 -4324
Lone Pine 06:49:17 -65.6 Dark Up 66.9 234.6 Up 06:34:17 - 07:04:17 -4354
Henderson 06:49:03 -67.7 Dark Up 65.1 240.4 Up 06:34:03 - 07:04:03 -4369
Patrick 06:48:58 -68.7 Dark Up 64.6 243.1 Up 06:33:58 - 07:03:58 -4418
Searchlight/Boulder City 06:49:02 -68.1 Dark Up 65.4 241.5 Up 06:34:02 - 07:04:02 -4429
DCO 06:48:54 -69.4 Dark Up 64.3 244.6 Up 06:33:54 - 07:03:54 -4438
Kingman/Dolan Springs 06:48:58 -68.8 Dark Up 64.9 243.2 Up 06:33:58 - 07:03:58 -4444
Laughlin/Bullhead City 06:49:00 -68.5 Dark Up 65.3 242.6 Up 06:34:00 - 07:04:00 -4454
Mohave Valley 06:48:59 -68.7 Dark Up 65.4 243.1 Up 06:33:59 - 07:03:59 -4483
Lake Havasu City 06:48:58 -69.2 Dark Up 65.4 244.2 Up 06:33:58 - 07:03:58 -4521
CPSLO 06:49:25 -64.8 Dark Up 69.3 232.6 Up 06:34:25 - 07:04:25 -4525
Parker 06:48:57 -69.4 Dark Up 65.5 245.0 Up 06:33:57 - 07:03:57 -4558
Blythe 06:48:58 -69.6 Dark Up 65.9 245.6 Up 06:33:58 - 07:03:58 -4618
Wildwood 06:49:16 -66.8 Dark Up 68.6 238.8 Up 06:34:16 - 07:04:16 -4627
Idyllwild 06:49:07 -68.2 Dark Up 67.5 242.5 Up 06:34:07 - 07:04:07 -4638
Calipatria 06:49:01 -69.4 Dark Up 66.9 245.4 Up 06:34:01 - 07:04:01 -4685
Yuma 06:48:57 -70.2 Dark Up 66.4 247.5 Up 06:33:57 - 07:03:57 -4717

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 123509, (2021/01/26 06:51UT)
Object            RA         Dec     mag  sep  mel
Betelgeuse     05:55:10.3 +07:24:26  0.4 14.08  19
Alhena         06:37:42.8 +16:23:57  1.9 10.29   9
PPM 095249     06:01:41.6 +22:24:04  6.2  1.06   6
PPM 095198     05:59:39.6 +21:36:14  6.7  0.17   7
123509         05:59:45.1 +21:26:22 12.0         7
Positions are for J2000

Event circumstances last updated at 2019/01/29 03:58:00 UT

Marc W. Buie, Southwest Research Institute

RECON