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 06:50:04 UTC

J2000 position of star is 05:59:45.1 +21:26:22
Equinox of date position of star is 06:00:56.3 +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=22.8

[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 385 seconds.
The 1-sigma cross-track error in the shadow position is 2174 km.0.072 arcsec
The sky-plane scale is 30308.7 km/arcsec.

The TNO has an absolute magnitude Hv=6.5
Diameter=302.0 km assuming a 5% albedo -- 15.2 sec chord
Diameter=123.3 km assuming a 30% albedo -- 6.2 sec chord
Dynamical classification is CLASSICAL
 
 
 
 
 
 

Star training set for 123509, (2021/01/26 06:50UT)
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 2.3 sigma about the mid-time.
The median site spacing is 26.1 km RECON observability=1.0 and success probability=9.6%
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 06:49:03 -54.5 Dark Up 57.6 214.1 Up 06:34:03 - 07:04:03 -3153
Kelowna 06:49:04 -54.8 Dark Up 58.0 214.1 Up 06:34:04 - 07:04:04 -3191
Summerland 06:49:04 -54.9 Dark Up 58.3 214.1 Up 06:34:04 - 07:04:04 -3219
Penticton 06:49:03 -55.0 Dark Up 58.3 214.3 Up 06:34:03 - 07:04:03 -3224
Oliver 06:49:03 -55.3 Dark Up 58.6 214.6 Up 06:34:03 - 07:04:03 -3258
Anarchist Mountain Observatory 06:49:02 -55.5 Dark Up 58.7 215.1 Up 06:34:02 - 07:04:02 -3272
Tonasket 06:49:02 -55.8 Dark Up 58.9 215.3 Up 06:34:02 - 07:04:02 -3303
Okanogan 06:49:02 -56.0 Dark Up 59.3 215.4 Up 06:34:02 - 07:04:02 -3337
Victoria 06:49:16 -54.3 Dark Up 60.5 208.7 Up 06:34:16 - 07:04:16 -3359
Brewster 06:49:02 -56.1 Dark Up 59.6 215.3 Up 06:34:02 - 07:04:02 -3365
Manson/Chelan 06:49:03 -56.1 Dark Up 59.9 214.9 Up 06:34:03 - 07:04:03 -3389
Entiat 06:49:03 -56.3 Dark Up 60.1 215.0 Up 06:34:03 - 07:04:03 -3412
Wenatchee 06:49:03 -56.4 Dark Up 60.3 215.1 Up 06:34:03 - 07:04:03 -3437
Ellensburg 06:49:03 -56.7 Dark Up 60.8 215.1 Up 06:34:03 - 07:04:03 -3480
Yakima 06:49:03 -57.0 Dark Up 61.1 215.5 Up 06:34:03 - 07:04:03 -3520
Pasco 06:48:57 -57.8 Dark Up 60.8 218.3 Up 06:33:57 - 07:03:57 -3538
Toppenish/White Swan 06:49:02 -57.2 Dark Up 61.2 216.0 Up 06:34:02 - 07:04:02 -3540
PNWRO 06:48:56 -58.1 Dark Up 60.9 219.0 Up 06:33:56 - 07:03:56 -3560
Goldendale 06:49:03 -57.4 Dark Up 61.8 215.9 Up 06:34:03 - 07:04:03 -3599
The Dalles 06:49:04 -57.4 Dark Up 62.2 215.5 Up 06:34:04 - 07:04:04 -3625
Maupin 06:49:03 -57.8 Dark Up 62.5 216.1 Up 06:34:03 - 07:04:03 -3666
Redmond 06:49:02 -58.4 Dark Up 63.2 217.0 Up 06:34:02 - 07:04:02 -3757
Sisters 06:49:04 -58.2 Dark Up 63.4 216.2 Up 06:34:04 - 07:04:04 -3759
Bend 06:49:02 -58.5 Dark Up 63.5 217.0 Up 06:34:02 - 07:04:02 -3780
Oregon Observatory 06:49:03 -58.6 Dark Up 63.6 217.0 Up 06:34:03 - 07:04:03 -3799
La Pine/Gilchrist 06:49:03 -58.7 Dark Up 63.8 217.1 Up 06:34:03 - 07:04:03 -3820
North Lake 06:48:59 -59.3 Dark Up 63.9 218.7 Up 06:33:59 - 07:03:59 -3858
Paisley 06:48:58 -59.9 Dark Up 64.2 220.1 Up 06:33:58 - 07:03:58 -3910
Niwot 06:47:56 -67.9 Dark Up 56.6 245.9 Up 06:32:56 - 07:02:56 -3940
SwRI 06:47:57 -67.9 Dark Up 56.7 245.9 Up 06:32:57 - 07:02:57 -3952
Lakeview 06:48:57 -60.3 Dark Up 64.5 221.1 Up 06:33:57 - 07:03:57 -3959
Klamath Falls 06:49:02 -59.6 Dark Up 65.1 218.4 Up 06:34:02 - 07:04:02 -3971
Cedarville 06:48:55 -60.9 Dark Up 64.9 222.4 Up 06:33:55 - 07:03:55 -4024
Fall River/Burney 06:48:59 -60.6 Dark Up 65.8 220.8 Up 06:33:59 - 07:03:59 -4088
Susanville 06:48:55 -61.4 Dark Up 65.9 223.1 Up 06:33:55 - 07:03:55 -4144
Gimple 06:48:56 -61.5 Dark Up 66.3 223.2 Up 06:33:56 - 07:03:56 -4176
Greenville 06:48:56 -61.4 Dark Up 66.3 223.0 Up 06:33:56 - 07:03:56 -4176
Quincy 06:48:56 -61.6 Dark Up 66.4 223.3 Up 06:33:56 - 07:03:56 -4197
Portola 06:48:55 -61.9 Dark Up 66.3 224.4 Up 06:33:55 - 07:03:55 -4205
Reno 06:48:51 -62.5 Dark Up 66.1 226.0 Up 06:33:51 - 07:03:51 -4225
Carson City 06:48:50 -62.7 Dark Up 66.4 226.7 Up 06:33:50 - 07:03:50 -4262
Yerington 06:48:48 -63.2 Dark Up 66.1 228.1 Up 06:33:48 - 07:03:48 -4274
Gardnerville 06:48:50 -62.9 Dark Up 66.5 227.2 Up 06:33:50 - 07:03:50 -4286
Hawthorne 06:48:45 -63.8 Dark Up 66.1 229.9 Up 06:33:45 - 07:03:45 -4316
Tonopah 06:48:39 -64.9 Dark Up 65.6 233.0 Up 06:33:39 - 07:03:39 -4345
Lee Vining 06:48:46 -63.9 Dark Up 66.8 230.0 Up 06:33:46 - 07:03:46 -4380
Bishop 06:48:43 -64.8 Dark Up 66.7 232.3 Up 06:33:43 - 07:03:43 -4434
Beatty 06:48:35 -66.0 Dark Up 66.0 235.9 Up 06:33:35 - 07:03:35 -4460
Indian Springs 06:48:30 -66.8 Dark Up 65.4 238.1 Up 06:33:30 - 07:03:30 -4479
Henderson 06:48:27 -67.6 Dark Up 65.2 240.1 Up 06:33:27 - 07:03:27 -4524
Patrick 06:48:22 -68.7 Dark Up 64.7 242.9 Up 06:33:22 - 07:03:22 -4573
Searchlight/Boulder City 06:48:26 -68.0 Dark Up 65.5 241.3 Up 06:33:26 - 07:03:26 -4584
DCO 06:48:18 -69.3 Dark Up 64.4 244.4 Up 06:33:18 - 07:03:18 -4594
Kingman/Dolan Springs 06:48:21 -68.7 Dark Up 65.0 243.0 Up 06:33:21 - 07:03:21 -4599
Laughlin/Bullhead City 06:48:24 -68.5 Dark Up 65.4 242.4 Up 06:33:24 - 07:03:24 -4610
Mohave Valley 06:48:23 -68.7 Dark Up 65.5 242.9 Up 06:33:23 - 07:03:23 -4638
Lake Havasu City 06:48:22 -69.1 Dark Up 65.5 244.0 Up 06:33:22 - 07:03:22 -4677
CPSLO 06:48:49 -64.7 Dark Up 69.4 232.3 Up 06:33:49 - 07:03:49 -4680
Parker 06:48:22 -69.3 Dark Up 65.6 244.8 Up 06:33:22 - 07:03:22 -4713
George/Scottsdale 06:48:10 -71.0 Dark Up 64.0 248.6 Up 06:33:10 - 07:03:10 -4718
Blythe 06:48:21 -69.5 Dark Up 66.1 245.4 Up 06:33:21 - 07:03:21 -4774
Wildwood 06:48:39 -66.7 Dark Up 68.7 238.5 Up 06:33:39 - 07:03:39 -4782
Idyllwild 06:48:31 -68.1 Dark Up 67.6 242.2 Up 06:33:31 - 07:03:31 -4793
Calipatria 06:48:25 -69.3 Dark Up 67.0 245.2 Up 06:33:25 - 07:03:25 -4840
Yuma 06:48:21 -70.1 Dark Up 66.5 247.3 Up 06:33:21 - 07:03:21 -4872

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 06:50UT)
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 2019/10/12 02:13:20 UT

Marc W. Buie, Southwest Research Institute

RECON