RECON: TNO occultation with 12XR157

Event between 12XR157 and star UC4-474-010055 with event index number of 314011

Geocentric closest approach at 2019/10/15 10:14:36 UTC

J2000 position of star is 05:19:43.3 +04:41:54
Equinox of date position of star is 05:20:43.2 +04:42:59
Stellar brightness R=16.2, use SENSEUP=128
Star is 42 degrees from the moon. Moon is 98% illuminated.
TNO apparent brightness V=22.5

[RECON map]
TNO is 40.4 AU from the Sun and 39.9 AU from the Earth.
The TNO is moving 15.3 km/sec on the sky relative to the star, or, 1.9 arcsec/hr.
The 1-sigma error in the time of the event is 136 seconds.
The 1-sigma cross-track error in the shadow position is 1947 km.
The sky-plane scale is 28956.0 km/arcsec.

The TNO has an absolute magnitude Hv=6.3
Diameter=335.7 km assuming a 5% albedo -- 21.9 sec chord
Diameter=137.1 km assuming a 30% albedo -- 8.9 sec chord
Dynamical classification is 2:1E
 
 
 
 
 
 

Star training set for 12XR157, (2019/10/15 10:15UT)
Object            RA         Dec     mag  sep  mel
Betelgeuse     05:56:14.6 +07:24:33  0.4  9.22  50
Bellatrix      05:26:11.6 +06:21:58  1.6  2.13  43
PPM 148809     05:22:22.0 +04:01:49  6.3  0.79  42
PPM 148804     05:22:06.1 +04:29:47  8.4  0.40  42
PPM 148784     05:21:26.1 +04:52:40 10.7  0.23  42
12XR157        05:20:46.3 +04:43:02 16.2        42
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 5.0 sigma about the mid-time.
The median site spacing is 11.5 km RECON observability=1.0 and success probability=15.4%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Summerland 10:12:27 -38.5 Dark Up 40.9 149.1 Up 10:00:37 - 10:24:18 2070
Kelowna 10:12:27 -38.3 Dark Up 41.0 149.6 Up 10:00:37 - 10:24:18 2055
Penticton 10:12:30 -38.6 Dark Up 41.2 149.2 Up 10:00:40 - 10:24:21 2051
Okanagan Falls 10:12:31 -38.7 Dark Up 41.4 149.1 Up 10:00:40 - 10:24:21 2045
Oliver 10:12:31 -38.8 Dark Up 41.5 149.1 Up 10:00:41 - 10:24:22 2038
Oroville 10:12:31 -38.9 Dark Up 41.8 149.1 Up 10:00:41 - 10:24:22 2024
Anarchist Mountain Observatory 10:12:31 -38.9 Dark Up 41.7 149.3 Up 10:00:40 - 10:24:21 2023
Manson/Chelan 10:12:39 -40.0 Dark Up 42.4 147.8 Up 10:00:49 - 10:24:30 2022
Entiat 10:12:41 -40.1 Dark Up 42.6 147.6 Up 10:00:50 - 10:24:31 2017
Tonasket 10:12:34 -39.1 Dark Up 42.0 149.0 Up 10:00:43 - 10:24:24 2016
Wenatchee 10:12:42 -40.3 Dark Up 42.8 147.3 Up 10:00:52 - 10:24:33 2013
Okanogan 10:12:35 -39.4 Dark Up 42.2 148.7 Up 10:00:44 - 10:24:25 2011
Brewster 10:12:38 -39.6 Dark Up 42.4 148.3 Up 10:00:47 - 10:24:28 2011
Ellensburg 10:12:46 -40.7 Dark Up 43.1 146.9 Up 10:00:55 - 10:24:36 2009
Yakima 10:12:48 -41.0 Dark Up 43.4 146.6 Up 10:00:57 - 10:24:38 1995
The Dalles 10:12:53 -41.9 Dark Up 44.0 145.4 Up 10:01:03 - 10:24:44 1989
Goldendale 10:12:52 -41.6 Dark Up 43.9 145.9 Up 10:01:01 - 10:24:42 1979
Toppenish/White Swan 10:12:48 -41.0 Dark Up 43.6 146.7 Up 10:00:57 - 10:24:38 1978
Maupin 10:12:56 -42.1 Dark Up 44.4 145.3 Up 10:01:05 - 10:24:46 1968
Sisters 10:13:04 -42.9 Dark Up 44.9 144.2 Up 10:01:13 - 10:24:54 1959
Madras/Culver 10:12:59 -42.5 Dark Up 44.8 144.9 Up 10:01:08 - 10:24:49 1949
Redmond 10:13:00 -42.7 Dark Up 45.1 144.7 Up 10:01:10 - 10:24:51 1937
Bend 10:13:04 -42.9 Dark Up 45.2 144.4 Up 10:01:13 - 10:24:54 1936
Oregon Observatory 10:13:04 -43.1 Dark Up 45.3 144.1 Up 10:01:14 - 10:24:55 1936
La Pine/Gilchrist 10:13:05 -43.3 Dark Up 45.4 143.9 Up 10:01:15 - 10:24:56 1931
Pasco 10:12:46 -40.4 Dark Up 44.2 148.3 Up 10:00:55 - 10:24:36 1909
George/Umatilla 10:12:47 -40.7 Dark Up 44.4 147.9 Up 10:00:56 - 10:24:37 1908
Chiloquin 10:13:14 -44.1 Dark Up 46.2 142.8 Up 10:01:24 - 10:25:05 1904
PNWRO 10:12:46 -40.4 Dark Up 44.5 148.5 Up 10:00:55 - 10:24:36 1888
Klamath Falls 10:13:15 -44.3 Dark Up 46.5 142.7 Up 10:01:24 - 10:25:05 1886
North Lake 10:13:06 -43.2 Dark Up 46.0 144.4 Up 10:01:15 - 10:24:56 1881
Tulelake 10:13:15 -44.3 Dark Up 46.8 142.9 Up 10:01:24 - 10:25:05 1858
Paisley 10:13:08 -43.3 Dark Up 46.6 144.6 Up 10:01:17 - 10:24:58 1839
Fall River/Burney 10:13:20 -44.8 Dark Up 47.6 142.5 Up 10:01:29 - 10:25:10 1814
Lakeview 10:13:10 -43.5 Dark Up 47.1 144.5 Up 10:01:19 - 10:25:00 1807
Cedarville 10:13:13 -43.8 Dark Up 47.8 144.4 Up 10:01:22 - 10:25:03 1769
Greenville 10:13:22 -45.0 Dark Up 48.5 142.5 Up 10:01:31 - 10:25:12 1750
Susanville 10:13:21 -44.7 Dark Up 48.5 143.0 Up 10:01:31 - 10:25:12 1746
Gimple 10:13:22 -45.0 Dark Up 48.6 142.6 Up 10:01:31 - 10:25:12 1745
Quincy 10:13:23 -45.1 Dark Up 48.7 142.3 Up 10:01:33 - 10:25:14 1740
Portola 10:13:22 -44.9 Dark Up 49.0 142.9 Up 10:01:32 - 10:25:13 1708
Reno 10:13:22 -44.6 Dark Up 49.5 143.6 Up 10:01:31 - 10:25:12 1659
Carson City 10:13:23 -44.8 Dark Up 49.8 143.4 Up 10:01:33 - 10:25:14 1641
Gardnerville 10:13:25 -44.9 Dark Up 50.1 143.2 Up 10:01:34 - 10:25:15 1626
Yerington 10:13:22 -44.5 Dark Up 50.3 144.1 Up 10:01:31 - 10:25:12 1595
Lee Vining 10:13:28 -45.0 Dark Up 51.2 143.4 Up 10:01:38 - 10:25:19 1543
Hawthorne 10:13:23 -44.4 Dark Up 50.9 144.5 Up 10:01:33 - 10:25:14 1542
CPSLO 10:13:48 -47.3 Dark Up 52.5 139.3 Up 10:01:58 - 10:25:39 1499
Bishop 10:13:28 -44.8 Dark Up 52.0 144.0 Up 10:01:38 - 10:25:19 1471
Tonopah 10:13:20 -43.7 Dark Up 51.9 146.2 Up 10:01:29 - 10:25:10 1437
Lone Pine 10:13:32 -44.9 Dark Up 52.8 143.9 Up 10:01:41 - 10:25:22 1412
Beatty 10:13:25 -43.9 Dark Up 53.1 146.0 Up 10:01:34 - 10:25:15 1350
Wildwood 10:13:47 -46.4 Dark Up 54.5 141.2 Up 10:01:57 - 10:25:38 1311
Indian Springs 10:13:22 -43.3 Dark Up 53.8 147.4 Up 10:01:31 - 10:25:12 1268
Henderson 10:13:22 -43.0 Dark Up 54.6 148.1 Up 10:01:31 - 10:25:12 1198
Idyllwild 10:13:41 -45.2 Dark Up 55.7 143.7 Up 10:01:51 - 10:25:32 1175
Searchlight/Boulder City 10:13:25 -43.2 Dark Up 55.1 147.7 Up 10:01:34 - 10:25:15 1162
Laughlin/Bullhead City 10:13:25 -43.1 Dark Up 55.5 148.1 Up 10:01:35 - 10:25:16 1124
Mohave Valley 10:13:26 -43.2 Dark Up 55.7 147.9 Up 10:01:35 - 10:25:16 1109
Patrick 10:13:20 -42.4 Dark Up 55.6 149.3 Up 10:01:29 - 10:25:10 1095
Kingman/Dolan Springs 10:13:23 -42.7 Dark Up 55.7 148.9 Up 10:01:32 - 10:25:13 1094
Lake Havasu City 10:13:28 -43.1 Dark Up 56.2 148.0 Up 10:01:37 - 10:25:18 1071
Calipatria 10:13:40 -44.6 Dark Up 56.8 145.0 Up 10:01:50 - 10:25:31 1067
Parker 10:13:29 -43.2 Dark Up 56.5 147.7 Up 10:01:39 - 10:25:20 1049
Blythe 10:13:33 -43.7 Dark Up 56.8 146.9 Up 10:01:43 - 10:25:24 1037
DCO 10:13:20 -42.0 Dark Up 56.2 150.3 Up 10:01:30 - 10:25:11 1034
Yuma 10:13:38 -44.0 Dark Up 57.6 146.0 Up 10:01:48 - 10:25:29 986
Niwot 10:12:24 -34.5 Dark Up 53.8 165.8 Up 10:00:34 - 10:24:15 842

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 12XR157, (2019/10/15 10:15UT)
Object            RA         Dec     mag  sep  mel
Betelgeuse     05:55:10.3 +07:24:26  0.4  9.22  50
Bellatrix      05:25:07.8 +06:20:58  1.6  2.13  43
PPM 148809     05:21:19.3 +04:00:43  6.3  0.79  42
PPM 148804     05:21:03.2 +04:28:41  8.4  0.40  42
PPM 148784     05:20:23.0 +04:51:32 10.7  0.23  42
12XR157        05:19:43.3 +04:41:54 16.2        42
Positions are for J2000

Event circumstances last updated at 2018/10/24 22:00:14 UT

Marc W. Buie, Southwest Research Institute

RECON