RECON: TNO occultation with 456826

Event between (456826) 07TH422 and star GA1060:01108228 with event index number of 231539

Geocentric closest approach at 2019/12/22 11:59:50 UTC

J2000 position of star is 05:37:24.4 +16:52:40
Equinox of date position of star is 05:38:30.7 +16:53:17
Stellar brightness G=13.5, use SENSEUP=32
Star is 139 degrees from the moon. Moon is 16% illuminated.
TNO apparent brightness V=22.4

[RECON map]
TNO is 29.6 AU from the Sun and 28.6 AU from the Earth.
The TNO is moving 25.0 km/sec on the sky relative to the star, or, 4.3 arcsec/hr.
The 1-sigma error in the time of the event is 229 seconds.
The 1-sigma cross-track error in the shadow position is 3652 km.
The sky-plane scale is 20728.1 km/arcsec.

The TNO has an absolute magnitude Hv=7.7
Diameter=173.8 km assuming a 5% albedo -- 7.0 sec chord
Diameter=70.9 km assuming a 30% albedo -- 2.8 sec chord
Dynamical classification is 3:2E+6:4II
 
 
 
 
 
 

Star training set for 456826, (2019/12/22 12:00UT)
Object            RA         Dec     mag  sep  mel
Betelgeuse     05:56:15.2 +07:24:33  0.4 10.42 134
Bellatrix      05:26:12.2 +06:21:58  1.6 10.95 141
122 Tau        05:38:13.3 +17:03:03  5.7  0.18 139
PPM 121196     05:38:42.3 +16:34:01  8.3  0.32 139
122 Tau        05:38:13.3 +17:03:03  5.7  0.18 139
PPM 121180     05:38:06.6 +16:55:08 10.7  0.11 139
456826         05:38:33.8 +16:53:19 13.5       139
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 3.9 sigma about the mid-time.
The median site spacing is 17.9 km RECON observability=1.0 and success probability=9.4%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Kelowna 11:57:34 -36.6 Dark Up 28.0 263.1 Low 11:42:34 - 12:12:34 -1001
Summerland 11:57:34 -36.8 Dark Up 28.2 262.8 Low 11:42:34 - 12:12:34 -1012
Penticton 11:57:33 -36.7 Dark Up 28.1 263.2 Low 11:42:33 - 12:12:33 -1031
Okanagan Falls 11:57:32 -36.8 Dark Up 28.1 263.2 Low 11:42:32 - 12:12:32 -1045
Oliver 11:57:32 -36.8 Dark Up 28.2 263.3 Low 11:42:32 - 12:12:32 -1056
Anarchist Mountain Observatory 11:57:31 -36.7 Dark Up 28.0 263.6 Low 11:42:31 - 12:12:31 -1064
Oroville 11:57:31 -36.7 Dark Up 28.1 263.6 Low 11:42:31 - 12:12:31 -1072
Tonasket 11:57:30 -36.8 Dark Up 28.1 263.7 Low 11:42:30 - 12:12:30 -1088
Okanogan 11:57:29 -36.9 Dark Up 28.3 263.8 Low 11:42:29 - 12:12:29 -1116
Brewster 11:57:29 -37.1 Dark Up 28.4 263.7 Low 11:42:29 - 12:12:29 -1141
Manson/Chelan 11:57:28 -37.3 Dark Up 28.7 263.6 Low 11:42:28 - 12:12:28 -1165
Entiat 11:57:28 -37.4 Dark Up 28.8 263.6 Low 11:42:28 - 12:12:28 -1183
Wenatchee 11:57:27 -37.5 Dark Up 28.9 263.7 Low 11:42:27 - 12:12:27 -1204
Ellensburg 11:57:26 -37.7 Dark Up 29.1 263.7 Low 11:42:26 - 12:12:26 -1240
Pasco 11:57:22 -36.8 Dark Up 28.2 265.2 Low 11:42:22 - 12:12:22 -1264
Yakima 11:57:25 -37.7 Dark Up 29.1 263.9 Low 11:42:25 - 12:12:25 -1272
PNWRO 11:57:21 -36.6 Dark Up 28.0 265.5 Low 11:42:21 - 12:12:21 -1278
Toppenish/White Swan 11:57:24 -37.6 Dark Up 29.0 264.2 Low 11:42:24 - 12:12:24 -1284
George/Umatilla 11:57:21 -36.9 Dark Up 28.4 265.2 Low 11:42:21 - 12:12:21 -1295
Goldendale 11:57:22 -38.0 Dark Up 29.4 264.2 Low 11:42:22 - 12:12:22 -1337
The Dalles 11:57:22 -38.2 Dark Up 29.7 264.0 Low 11:42:22 - 12:12:22 -1363
Maupin 11:57:21 -38.2 Dark Up 29.6 264.3 Low 11:42:21 - 12:12:21 -1393
Niwot 11:56:51 -26.4 Dark Up 18.0 277.2 Really Low 11:41:51 - 12:11:51 -1398
SwRI 11:56:50 -26.4 Dark Up 18.0 277.2 Really Low 11:41:50 - 12:11:50 -1408
Madras/Culver 11:57:19 -38.3 Dark Up 29.7 264.6 Low 11:42:19 - 12:12:19 -1437
Redmond 11:57:18 -38.3 Dark Up 29.8 264.8 Low 11:42:18 - 12:12:18 -1467
Sisters 11:57:19 -38.6 Dark Up 30.1 264.5 Up 11:42:19 - 12:12:19 -1474
Bend 11:57:18 -38.5 Dark Up 29.9 264.8 Low 11:42:18 - 12:12:18 -1487
Oregon Observatory 11:57:17 -38.6 Dark Up 30.0 264.8 Up 11:42:17 - 12:12:17 -1504
La Pine/Gilchrist 11:57:17 -38.6 Dark Up 30.1 264.9 Up 11:42:17 - 12:12:17 -1522
North Lake 11:57:15 -38.2 Dark Up 29.7 265.5 Low 11:42:15 - 12:12:15 -1543
Paisley 11:57:13 -38.0 Dark Up 29.5 266.1 Low 11:42:13 - 12:12:13 -1579
Lakeview 11:57:11 -37.9 Dark Up 29.4 266.5 Low 11:42:11 - 12:12:11 -1615
Chiloquin 11:57:14 -38.9 Dark Up 30.5 265.2 Up 11:42:14 - 12:12:14 -1621
Klamath Falls 11:57:13 -38.9 Dark Up 30.4 265.5 Up 11:42:13 - 12:12:13 -1647
Tulelake 11:57:12 -38.7 Dark Up 30.2 265.9 Up 11:42:12 - 12:12:12 -1662
Cedarville 11:57:09 -37.7 Dark Up 29.3 267.0 Low 11:42:09 - 12:12:09 -1665
Fall River/Burney 11:57:09 -38.7 Dark Up 30.2 266.4 Up 11:42:09 - 12:12:09 -1735
Susanville 11:57:06 -38.1 Dark Up 29.7 267.3 Low 11:42:06 - 12:12:06 -1769
Gimple 11:57:06 -38.3 Dark Up 29.9 267.3 Low 11:42:06 - 12:12:06 -1798
Greenville 11:57:06 -38.4 Dark Up 30.0 267.3 Low 11:42:06 - 12:12:06 -1800
Portola 11:57:04 -38.0 Dark Up 29.6 267.8 Low 11:42:04 - 12:12:04 -1816
Quincy 11:57:05 -38.4 Dark Up 30.0 267.4 Low 11:42:05 - 12:12:05 -1817
Reno 11:57:02 -37.5 Dark Up 29.1 268.3 Low 11:42:02 - 12:12:02 -1821
Carson City 11:57:01 -37.5 Dark Up 29.1 268.5 Low 11:42:01 - 12:12:01 -1851
Yerington 11:57:00 -37.0 Dark Up 28.6 269.1 Low 11:42:00 - 12:12:00 -1851
Gardnerville 11:57:01 -37.4 Dark Up 29.1 268.7 Low 11:42:01 - 12:12:01 -1871
Hawthorne 11:56:58 -36.6 Dark Up 28.2 269.6 Low 11:41:58 - 12:11:58 -1877
Tonopah 11:56:55 -35.4 Dark Up 27.1 270.7 Low 11:41:55 - 12:11:55 -1880
Lee Vining 11:56:57 -36.9 Dark Up 28.6 269.6 Low 11:41:57 - 12:11:57 -1938
Indian Springs 11:56:49 -34.1 Dark Up 25.9 272.4 Low 11:41:49 - 12:11:49 -1966
Beatty 11:56:51 -35.0 Dark Up 26.8 271.6 Low 11:41:51 - 12:11:51 -1967
Bishop 11:56:55 -36.3 Dark Up 28.1 270.4 Low 11:41:55 - 12:11:55 -1971
Henderson 11:56:47 -33.5 Dark Up 25.3 273.0 Low 11:41:47 - 12:11:47 -1993
Patrick 11:56:44 -32.5 Dark Up 24.4 273.9 Low 11:41:44 - 12:11:44 -2017
DCO 11:56:42 -31.9 Dark Up 23.8 274.5 Low 11:41:42 - 12:11:42 -2025
Lone Pine 11:56:52 -36.0 Dark Up 27.8 271.0 Low 11:41:52 - 12:11:52 -2028
Searchlight/Boulder City 11:56:45 -33.4 Dark Up 25.2 273.3 Low 11:41:45 - 12:11:45 -2042
Kingman/Dolan Springs 11:56:43 -32.7 Dark Up 24.5 273.9 Low 11:41:43 - 12:11:43 -2042
Laughlin/Bullhead City 11:56:44 -33.1 Dark Up 24.9 273.7 Low 11:41:44 - 12:11:44 -2058
Mohave Valley 11:56:43 -33.0 Dark Up 24.9 273.8 Low 11:41:43 - 12:11:43 -2082
Lake Havasu City 11:56:42 -32.8 Dark Up 24.7 274.1 Low 11:41:42 - 12:11:42 -2110
Parker 11:56:41 -32.7 Dark Up 24.7 274.3 Low 11:41:41 - 12:11:41 -2140
Blythe 11:56:40 -32.9 Dark Up 24.9 274.4 Low 11:41:40 - 12:11:40 -2195
CPSLO 11:56:52 -38.0 Dark Up 29.9 270.2 Low 11:41:52 - 12:11:52 -2212
Idyllwild 11:56:42 -34.7 Dark Up 26.6 273.2 Low 11:41:42 - 12:11:42 -2244
Wildwood 11:56:46 -36.3 Dark Up 28.2 272.0 Low 11:41:46 - 12:11:46 -2264
Calipatria 11:56:39 -33.6 Dark Up 25.6 274.1 Low 11:41:39 - 12:11:39 -2266
Yuma 11:56:37 -32.8 Dark Up 24.8 274.8 Low 11:41:37 - 12:11:37 -2279

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 456826, (2019/12/22 12:00UT)
Object            RA         Dec     mag  sep  mel
Betelgeuse     05:55:10.3 +07:24:26  0.4 10.42 134
Bellatrix      05:25:07.8 +06:20:58  1.6 10.95 141
122 Tau        05:37:03.8 +17:02:24  5.7  0.18 139
PPM 121196     05:37:33.0 +16:33:22  8.3  0.32 139
122 Tau        05:37:03.8 +17:02:24  5.7  0.18 139
PPM 121180     05:36:57.1 +16:54:29 10.7  0.11 139
456826         05:37:24.4 +16:52:40 13.5       139
Positions are for J2000

Event circumstances last updated at 2019/01/30 20:47:11 UT

Marc W. Buie, Southwest Research Institute

RECON