RECON: TNO occultation with 42301

Event between (42301) 01UR163 and star UC4-522-003628 with event index number of 171893

Geocentric closest approach at 2018/12/24 01:42:53 UTC

J2000 position of star is 02:14:10.5 +14:16:32
Equinox of date position of star is 02:15:09.0 +14:21:31
Stellar brightness R=13.1, use SENSEUP=32
Star is 74 degrees from the moon. Moon is 97% illuminated.
TNO apparent brightness V=21.4

[RECON map]
TNO is 53.0 AU from the Sun and 52.5 AU from the Earth.
The TNO is moving 13.1 km/sec on the sky relative to the star, or, 1.2 arcsec/hr.
The 1-sigma error in the time of the event is 174 seconds.
The 1-sigma cross-track error in the shadow position is 2154 km.
The sky-plane scale is 38062.2 km/arcsec.

The TNO has an absolute magnitude Hv=4.1
Diameter=912.0 km assuming a 5% albedo -- 69.8 sec chord
Diameter=372.3 km assuming a 30% albedo -- 28.5 sec chord
Dynamical classification is 9:4EEEEE
 
 
 
 
 
 

Star training set for 42301, (2018/12/24 01:43UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:37:00.7 +16:32:46  0.8 34.20  41
6Bet Ari       01:55:41.5 +20:54:00  2.6  8.02  77
19 Ari         02:14:05.6 +15:22:05  5.7  1.04  74
PPM 118034     02:13:44.5 +14:00:24  8.0  0.50  75
PPM 118038     02:14:03.7 +14:19:46  9.5  0.28  75
42301          02:15:12.5 +14:21:48 13.1        74
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 41.0 km RECON observability=0.1 and success probability=0.0%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Oroville 01:44:04 -15.4 AT Up 45.3 128.8 Up 01:29:04 - 01:59:04 11369
Tonasket 01:44:04 -15.3 AT Up 45.5 128.6 Up 01:29:04 - 01:59:04 11354
Okanogan 01:44:04 -15.1 AT Up 45.6 128.2 Up 01:29:04 - 01:59:04 11336
Brewster 01:44:04 -14.9 AT Up 45.7 127.7 Up 01:29:04 - 01:59:04 11325
Manson/Chelan 01:44:04 -14.6 AT Up 45.6 127.1 Up 01:29:04 - 01:59:04 11323
Entiat 01:44:04 -14.5 AT Up 45.7 126.9 Up 01:29:04 - 01:59:04 11311
Wenatchee 01:44:22 -14.4 AT Up 45.8 126.6 Up 01:29:22 - 01:59:22 11295
Ellensburg 01:44:25 -14.1 AT Up 46.0 126.1 Up 01:29:25 - 01:59:25 11274
Yakima 01:44:29 -14.0 AT Up 46.2 125.7 Up 01:29:29 - 01:59:29 11246
Toppenish/White Swan 01:44:29 -14.0 AT Up 46.4 125.7 Up 01:29:29 - 01:59:29 11226
Goldendale 01:44:33 -13.6 AT Down 46.5 124.8 Up 01:29:33 - 01:59:33 11202
The Dalles 01:44:37 -13.3 AT Down 46.4 124.2 Up 01:29:37 - 01:59:37 11198
Pasco 01:44:25 -14.8 AT Up 47.2 127.1 Up 01:29:25 - 01:59:25 11177
Maupin 01:44:38 -13.2 AT Down 46.7 124.0 Up 01:29:38 - 01:59:38 11165
George/Umatilla 01:44:27 -14.6 AT Up 47.3 126.5 Up 01:29:27 - 01:59:27 11161
PNWRO 01:44:24 -14.9 AT Up 47.5 127.1 Up 01:29:24 - 01:59:24 11152
Madras/Culver 01:44:42 -13.0 AT Down 47.0 123.4 Up 01:29:42 - 01:59:42 11128
Sisters 01:44:46 -12.6 AT Down 46.9 122.7 Up 01:29:46 - 01:59:46 11119
Redmond 01:44:44 -12.8 AT Down 47.2 123.1 Up 01:29:44 - 01:59:44 11104
Bend 01:44:45 -12.7 AT Down 47.2 122.7 Up 01:29:45 - 01:59:45 11094
Oregon Observatory 01:44:47 -12.5 AT Down 47.2 122.4 Up 01:29:47 - 01:59:47 11086
La Pine/Gilchrist 01:44:49 -12.4 AT Down 47.3 122.2 Up 01:29:49 - 01:59:49 11073
North Lake 01:44:49 -12.7 AT Down 47.9 122.5 Up 01:29:49 - 01:59:49 11022
Chiloquin 01:44:58 -11.8 CT Down 47.7 120.8 Up 01:29:58 - 01:59:58 11005
Klamath Falls 01:44:58 -11.7 CT Down 47.9 120.6 Up 01:29:58 - 01:59:58 10977
Paisley 01:44:50 -12.7 AT Down 48.4 122.3 Up 01:29:50 - 01:59:50 10969
Tulelake 01:45:00 -11.9 CT Down 48.3 120.6 Up 01:30:00 - 02:00:00 10947
Lakeview 01:44:53 -12.7 AT Down 48.8 122.1 Up 01:29:53 - 01:59:53 10925
Fall River/Burney 01:45:03 -11.6 CT Down 48.8 119.9 Up 01:30:03 - 02:00:03 10876
Cedarville 01:44:55 -12.6 AT Down 49.3 121.6 Up 01:29:55 - 01:59:55 10870
Susanville 01:45:05 -11.9 CT Down 49.6 120.0 Up 01:30:05 - 02:00:05 10803
Greenville 01:45:06 -11.6 CT Down 49.5 119.4 Up 01:30:06 - 02:00:06 10792
Gimple 01:45:06 -11.7 CT Down 49.6 119.5 Up 01:30:06 - 02:00:06 10789
Quincy 01:45:08 -11.5 CT Down 49.6 119.2 Up 01:30:08 - 02:00:08 10776
Portola 01:45:06 -11.8 CT Down 50.0 119.6 Up 01:30:06 - 02:00:06 10750
Reno 01:45:05 -12.2 AT Down 50.6 120.1 Up 01:30:05 - 02:00:05 10706
Carson City 01:45:06 -12.1 AT Down 50.8 119.7 Up 01:30:06 - 02:00:06 10677
Gardnerville 01:45:08 -12.0 AT Down 50.9 119.5 Up 01:30:08 - 02:00:08 10657
Yerington 01:45:05 -12.5 AT Down 51.3 120.2 Up 01:30:05 - 02:00:05 10639
Hawthorne 01:45:05 -12.7 AT Down 51.9 120.3 Up 01:30:05 - 02:00:05 10584
Lee Vining 01:45:09 -12.2 AT Down 51.9 119.1 Up 01:30:09 - 02:00:09 10556
Tonopah 01:45:00 -13.6 AT Down 53.1 121.4 Up 01:30:00 - 02:00:00 10495
Bishop 01:45:09 -12.5 AT Down 52.6 119.3 Up 01:30:09 - 02:00:09 10482
Lone Pine 01:45:11 -12.5 AT Down 53.3 118.8 Up 01:30:11 - 02:00:11 10408
CPSLO 01:45:32 -10.1 CT Down 52.0 114.6 Up 01:30:32 - 02:00:32 10399
Beatty 01:45:03 -13.6 AT Down 54.0 120.6 Up 01:30:03 - 02:00:03 10384
Indian Springs 01:45:00 -14.3 AT Down 54.9 121.4 Up 01:30:00 - 02:00:00 10317
Henderson 01:44:59 -14.6 AT Down 55.6 121.6 Up 01:29:59 - 01:59:59 10247
Niwot 01:43:47 -22.9 Dark Up 58.7 139.9 Up 01:28:47 - 01:58:47 10235
Wildwood 01:45:27 -11.3 CT Down 54.0 115.2 Up 01:30:27 - 02:00:27 10221
Searchlight/Boulder City 01:45:01 -14.5 AT Down 56.0 121.0 Up 01:30:01 - 02:00:01 10196
Laughlin/Bullhead City 01:45:01 -14.7 AT Down 56.4 121.0 Up 01:30:01 - 02:00:01 10158
Patrick 01:44:56 -15.3 AT Down 56.7 122.2 Up 01:29:56 - 01:59:56 10152
Kingman/Dolan Springs 01:44:59 -15.1 AT Down 56.7 121.7 Up 01:29:59 - 01:59:59 10140
Mohave Valley 01:45:02 -14.6 AT Down 56.5 120.7 Up 01:30:02 - 02:00:02 10135
Idyllwild 01:45:21 -12.6 AT Down 55.6 116.8 Up 01:30:21 - 02:00:21 10118
DCO 01:44:55 -15.7 AT Down 57.4 122.6 Up 01:29:55 - 01:59:55 10099
Lake Havasu City 01:45:04 -14.7 AT Down 56.9 120.4 Up 01:30:04 - 02:00:04 10091
Parker 01:45:05 -14.6 AT Down 57.1 120.0 Up 01:30:05 - 02:00:05 10060
Blythe 01:45:09 -14.2 AT Down 57.2 119.0 Up 01:30:09 - 02:00:09 10026
Calipatria 01:45:18 -13.3 AT Down 56.7 117.3 Up 01:30:18 - 02:00:18 10020
Yuma 01:45:14 -13.9 AT Down 57.6 117.7 Up 01:30:14 - 02:00:14 9948

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 42301, (2018/12/24 01:43UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:35:55.3 +16:30:30  0.8 34.20  41
6Bet Ari       01:54:38.5 +20:48:27  2.6  8.02  77
19 Ari         02:13:03.4 +15:16:47  5.7  1.04  74
PPM 118034     02:12:42.6 +13:55:06  8.0  0.50  75
PPM 118038     02:13:01.7 +14:14:29  9.5  0.28  75
42301          02:14:10.5 +14:16:32 13.1        74
Positions are for J2000

Event circumstances last updated at 2017/12/05 19:08:17 UT

Marc W. Buie, Southwest Research Institute

RECON