RECON: TNO occultation with 123509

Event between (123509) 00WK183 and star GA1100:01470627 with event index number of 170323

Geocentric closest approach at 2019/01/05 10:59:46 UTC

J2000 position of star is 05:49:49.6 +21:25:20
Equinox of date position of star is 05:50:57.2 +21:25:36
Stellar brightness G=15.7, use SENSEUP=128
Star is 170 degrees from the moon. Moon is 0% illuminated.
TNO apparent brightness V=22.9

[RECON map]
TNO is 42.6 AU from the Sun and 41.7 AU from the Earth.
The TNO is moving 24.4 km/sec on the sky relative to the star, or, 2.9 arcsec/hr.
The 1-sigma error in the time of the event is 1591 seconds.
The 1-sigma cross-track error in the shadow position is 5796 km.
The sky-plane scale is 30232.7 km/arcsec.

The TNO has an absolute magnitude Hv=6.6
Diameter=288.4 km assuming a 5% albedo -- 11.8 sec chord
Diameter=117.7 km assuming a 30% albedo -- 4.8 sec chord
Dynamical classification is CLASSICAL
 
 
 
 
 
 

Star training set for 123509, (2019/01/05 11:00UT)
Object            RA         Dec     mag  sep  mel
Betelgeuse     05:56:12.1 +07:24:33  0.4 14.07 163
Alnath         05:27:29.7 +28:37:18  1.6  8.94 163
54Chi1Ori      05:55:30.6 +20:16:41  5.1  1.56 170
PPM 094925     05:50:21.0 +21:08:26  7.1  0.32 169
PPM 094937     05:50:39.8 +21:18:58  9.5  0.13 169
123509         05:50:58.0 +21:25:36 15.7       170
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 0.6 sigma about the mid-time.
The median site spacing is 19.3 km RECON observability=1.0 and success probability=3.7%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Kelowna 10:57:15 -46.4 Dark Down 34.0 263.3 Up 10:42:15 - 11:12:15 9819
Summerland 10:57:15 -46.7 Dark Down 34.2 263.0 Up 10:42:15 - 11:12:15 9807
Penticton 10:57:15 -46.7 Dark Down 34.1 263.4 Up 10:42:15 - 11:12:15 9785
Okanagan Falls 10:57:14 -46.8 Dark Down 34.2 263.5 Up 10:42:14 - 11:12:14 9769
Oliver 10:57:12 -46.8 Dark Down 34.2 263.6 Up 10:42:12 - 11:12:12 9756
Anarchist Mountain Observatory 10:57:12 -46.8 Dark Down 34.1 263.9 Up 10:42:12 - 11:12:12 9746
Oroville 10:57:12 -46.8 Dark Down 34.1 263.9 Up 10:42:12 - 11:12:12 9738
Tonasket 10:57:11 -46.9 Dark Down 34.1 264.1 Up 10:42:11 - 11:12:11 9719
Okanogan 10:57:11 -47.1 Dark Down 34.3 264.2 Up 10:42:11 - 11:12:11 9687
Brewster 10:57:10 -47.4 Dark Down 34.4 264.2 Up 10:42:10 - 11:12:10 9659
Manson/Chelan 10:57:10 -47.7 Dark Down 34.7 264.0 Up 10:42:10 - 11:12:10 9633
Entiat 10:57:09 -47.8 Dark Down 34.8 264.1 Up 10:42:09 - 11:12:09 9613
Wenatchee 10:57:09 -48.0 Dark Down 34.9 264.2 Up 10:42:09 - 11:12:09 9589
Ellensburg 10:57:08 -48.2 Dark Down 35.1 264.3 Up 10:42:08 - 11:12:08 9548
Pasco 10:57:04 -47.6 Dark Down 34.2 265.9 Up 10:42:04 - 11:12:04 9519
Yakima 10:57:07 -48.4 Dark Down 35.1 264.6 Up 10:42:07 - 11:12:07 9513
PNWRO 10:57:02 -47.5 Dark Down 34.0 266.3 Up 10:42:02 - 11:12:02 9503
Toppenish/White Swan 10:57:05 -48.4 Dark Down 35.0 264.9 Up 10:42:05 - 11:12:05 9498
George/Umatilla 10:57:03 -47.8 Dark Down 34.4 266.0 Up 10:42:03 - 11:12:03 9485
Goldendale 10:57:04 -48.8 Dark Down 35.4 265.0 Up 10:42:04 - 11:12:04 9440
The Dalles 10:57:05 -49.2 Dark Down 35.7 264.8 Up 10:42:05 - 11:12:05 9412
Maupin 10:57:04 -49.2 Dark Down 35.6 265.2 Up 10:42:04 - 11:12:04 9377
Niwot 10:56:30 -38.7 Dark Down 23.9 278.6 Low 10:41:30 - 11:11:30 9374
Madras/Culver 10:57:02 -49.4 Dark Down 35.7 265.6 Up 10:42:02 - 11:12:02 9328
Redmond 10:57:01 -49.6 Dark Down 35.8 265.8 Up 10:42:01 - 11:12:01 9295
Sisters 10:57:02 -49.9 Dark Down 36.0 265.5 Up 10:42:02 - 11:12:02 9287
Bend 10:57:01 -49.8 Dark Down 35.9 265.8 Up 10:42:01 - 11:12:01 9273
Oregon Observatory 10:57:01 -49.9 Dark Down 36.0 265.9 Up 10:42:01 - 11:12:01 9254
La Pine/Gilchrist 10:57:00 -50.0 Dark Down 36.0 266.0 Up 10:42:00 - 11:12:00 9234
North Lake 10:56:59 -49.7 Dark Down 35.6 266.7 Up 10:41:59 - 11:11:59 9210
Paisley 10:56:56 -49.6 Dark Down 35.4 267.3 Up 10:41:56 - 11:11:56 9170
Lakeview 10:56:54 -49.6 Dark Down 35.3 267.8 Up 10:41:54 - 11:11:54 9129
Chiloquin 10:56:57 -50.6 Dark Down 36.4 266.5 Up 10:41:57 - 11:11:57 9125
Klamath Falls 10:56:57 -50.6 Dark Down 36.4 266.8 Up 10:41:57 - 11:11:57 9096
Tulelake 10:56:56 -50.5 Dark Down 36.1 267.2 Up 10:41:56 - 11:11:56 9079
Cedarville 10:56:53 -49.7 Dark Down 35.2 268.4 Up 10:41:53 - 11:11:53 9074
Fall River/Burney 10:56:53 -50.7 Dark Down 36.1 267.9 Up 10:41:53 - 11:11:53 8998
Susanville 10:56:51 -50.3 Dark Down 35.6 268.9 Up 10:41:51 - 11:11:51 8960
Gimple 10:56:50 -50.5 Dark Down 35.8 268.9 Up 10:41:50 - 11:11:50 8928
Greenville 10:56:50 -50.6 Dark Down 35.8 268.9 Up 10:41:50 - 11:11:50 8926
Portola 10:56:48 -50.3 Dark Down 35.5 269.4 Up 10:41:48 - 11:11:48 8909
Quincy 10:56:49 -50.6 Dark Down 35.8 269.0 Up 10:41:49 - 11:11:49 8908
Reno 10:56:46 -49.9 Dark Down 35.0 270.0 Up 10:41:46 - 11:11:46 8902
Carson City 10:56:45 -50.0 Dark Down 35.0 270.3 Up 10:41:45 - 11:11:45 8869
Yerington 10:56:44 -49.5 Dark Down 34.5 270.8 Up 10:41:44 - 11:11:44 8868
Gardnerville 10:56:45 -50.0 Dark Down 34.9 270.5 Up 10:41:45 - 11:11:45 8848
Hawthorne 10:56:42 -49.2 Dark Down 34.1 271.5 Up 10:41:42 - 11:11:42 8840
Tonopah 10:56:39 -48.2 Dark Down 32.9 272.6 Up 10:41:39 - 11:11:39 8836
Lee Vining 10:56:41 -49.7 Dark Down 34.4 271.5 Up 10:41:41 - 11:11:41 8773
Indian Springs 10:56:32 -47.2 Dark Down 31.6 274.4 Up 10:41:32 - 11:11:32 8743
Beatty 10:56:35 -48.0 Dark Down 32.5 273.6 Up 10:41:35 - 11:11:35 8742
Bishop 10:56:39 -49.2 Dark Down 33.8 272.4 Up 10:41:39 - 11:11:39 8738
Henderson 10:56:30 -46.7 Dark Down 31.0 275.1 Up 10:41:30 - 11:11:30 8713
Patrick 10:56:27 -45.8 Dark Down 30.1 276.1 Up 10:41:27 - 11:11:27 8688
DCO 10:56:25 -45.3 Dark Down 29.5 276.6 Low 10:41:25 - 11:11:25 8681
Lone Pine 10:56:36 -49.1 Dark Down 33.5 273.1 Up 10:41:36 - 11:11:36 8676
Kingman/Dolan Springs 10:56:27 -46.0 Dark Down 30.2 276.1 Up 10:41:27 - 11:11:27 8661
Searchlight/Boulder City 10:56:28 -46.7 Dark Down 31.0 275.5 Up 10:41:28 - 11:11:28 8661
Laughlin/Bullhead City 10:56:27 -46.4 Dark Down 30.6 275.8 Up 10:41:27 - 11:11:27 8643
Mohave Valley 10:56:27 -46.4 Dark Down 30.6 276.0 Up 10:41:27 - 11:11:27 8618
Lake Havasu City 10:56:25 -46.2 Dark Down 30.4 276.4 Up 10:41:25 - 11:11:25 8588
Parker 10:56:24 -46.2 Dark Down 30.3 276.6 Up 10:41:24 - 11:11:24 8555
Blythe 10:56:24 -46.5 Dark Down 30.5 276.7 Up 10:41:24 - 11:11:24 8496
CPSLO 10:56:38 -51.3 Dark Down 35.6 272.5 Up 10:41:38 - 11:11:38 8478
Idyllwild 10:56:28 -48.2 Dark Down 32.3 275.6 Up 10:41:28 - 11:11:28 8442
Wildwood 10:56:31 -49.8 Dark Down 33.8 274.4 Up 10:41:31 - 11:11:31 8421
Calipatria 10:56:24 -47.3 Dark Down 31.2 276.6 Up 10:41:24 - 11:11:24 8420
Yuma 10:56:22 -46.6 Dark Down 30.4 277.3 Up 10:41:22 - 11:11:22 8406

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, (2019/01/05 11:00UT)
Object            RA         Dec     mag  sep  mel
Betelgeuse     05:55:10.3 +07:24:26  0.4 14.07 163
Alnath         05:26:17.5 +28:36:23  1.6  8.94 163
54Chi1Ori      05:54:22.7 +20:16:32  5.1  1.56 170
PPM 094925     05:49:12.8 +21:08:09  7.1  0.32 169
PPM 094937     05:49:31.4 +21:18:42  9.5  0.13 169
123509         05:49:49.6 +21:25:20 15.7       169
Positions are for J2000

Event circumstances last updated at 2018/10/15 20:26:25 UT

Marc W. Buie, Southwest Research Institute

RECON