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 02:15:07.3 +14:21:22
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 179 seconds.
The 1-sigma cross-track error in the shadow position is 2203 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 40.9 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 11361
Tonasket 01:44:04 -15.3 AT Up 45.5 128.6 Up 01:29:04 - 01:59:04 11345
Okanogan 01:44:04 -15.1 AT Up 45.6 128.2 Up 01:29:04 - 01:59:04 11328
Brewster 01:44:04 -14.9 AT Up 45.7 127.7 Up 01:29:04 - 01:59:04 11316
Manson/Chelan 01:44:04 -14.6 AT Up 45.6 127.1 Up 01:29:04 - 01:59:04 11314
Entiat 01:44:04 -14.5 AT Up 45.7 126.9 Up 01:29:04 - 01:59:04 11302
Wenatchee 01:44:04 -14.3 AT Up 45.8 126.6 Up 01:29:04 - 01:59:04 11288
Ellensburg 01:44:24 -14.1 AT Up 46.0 126.1 Up 01:29:24 - 01:59:24 11265
Yakima 01:44:27 -14.0 AT Up 46.2 125.7 Up 01:29:27 - 01:59:27 11237
Toppenish/White Swan 01:44:28 -14.0 AT Up 46.4 125.7 Up 01:29:28 - 01:59:28 11217
Goldendale 01:44:33 -13.6 AT Down 46.5 124.8 Up 01:29:33 - 01:59:33 11193
The Dalles 01:44:35 -13.3 AT Down 46.4 124.2 Up 01:29:35 - 01:59:35 11189
Pasco 01:44:25 -14.8 AT Up 47.2 127.1 Up 01:29:25 - 01:59:25 11168
Maupin 01:44:38 -13.2 AT Down 46.7 124.0 Up 01:29:38 - 01:59:38 11156
George/Umatilla 01:44:27 -14.6 AT Up 47.3 126.5 Up 01:29:27 - 01:59:27 11151
PNWRO 01:44:22 -14.9 AT Up 47.5 127.1 Up 01:29:22 - 01:59:22 11143
Madras/Culver 01:44:41 -13.0 AT Down 47.0 123.4 Up 01:29:41 - 01:59:41 11119
Sisters 01:44:45 -12.6 AT Down 46.9 122.7 Up 01:29:45 - 01:59:45 11111
Redmond 01:44:42 -12.8 AT Down 47.2 123.1 Up 01:29:42 - 01:59:42 11096
Bend 01:44:46 -12.7 AT Down 47.2 122.7 Up 01:29:46 - 01:59:46 11085
Oregon Observatory 01:44:46 -12.5 AT Down 47.2 122.4 Up 01:29:46 - 01:59:46 11077
La Pine/Gilchrist 01:44:48 -12.4 AT Down 47.3 122.2 Up 01:29:48 - 01:59:48 11065
North Lake 01:44:48 -12.7 AT Down 47.9 122.4 Up 01:29:48 - 01:59:48 11013
Chiloquin 01:44:55 -11.8 CT Down 47.7 120.8 Up 01:29:55 - 01:59:55 10996
Klamath Falls 01:44:58 -11.7 CT Down 47.9 120.6 Up 01:29:58 - 01:59:58 10968
Paisley 01:44:47 -12.7 AT Down 48.4 122.3 Up 01:29:47 - 01:59:47 10960
Tulelake 01:44:57 -11.9 CT Down 48.3 120.6 Up 01:29:57 - 01:59:57 10938
Lakeview 01:44:51 -12.7 AT Down 48.8 122.1 Up 01:29:51 - 01:59:51 10916
Fall River/Burney 01:45:02 -11.6 CT Down 48.8 119.9 Up 01:30:02 - 02:00:02 10867
Cedarville 01:44:54 -12.6 AT Down 49.3 121.6 Up 01:29:54 - 01:59:54 10861
Susanville 01:45:04 -11.9 CT Down 49.6 120.0 Up 01:30:04 - 02:00:04 10793
Greenville 01:45:06 -11.6 CT Down 49.5 119.4 Up 01:30:06 - 02:00:06 10783
Gimple 01:45:05 -11.7 CT Down 49.6 119.5 Up 01:30:05 - 02:00:05 10780
Quincy 01:45:07 -11.5 CT Down 49.6 119.2 Up 01:30:07 - 02:00:07 10767
Portola 01:45:05 -11.8 CT Down 50.0 119.6 Up 01:30:05 - 02:00:05 10741
Reno 01:45:04 -12.2 AT Down 50.6 120.1 Up 01:30:04 - 02:00:04 10697
Carson City 01:45:04 -12.1 AT Down 50.8 119.7 Up 01:30:04 - 02:00:04 10668
Gardnerville 01:45:07 -12.0 AT Down 50.9 119.5 Up 01:30:07 - 02:00:07 10647
Yerington 01:45:03 -12.5 AT Down 51.3 120.2 Up 01:30:03 - 02:00:03 10630
Hawthorne 01:45:03 -12.7 AT Down 51.9 120.3 Up 01:30:03 - 02:00:03 10574
Lee Vining 01:45:08 -12.2 AT Down 51.8 119.1 Up 01:30:08 - 02:00:08 10547
Tonopah 01:45:00 -13.6 AT Down 53.1 121.4 Up 01:30:00 - 02:00:00 10485
Bishop 01:45:09 -12.5 AT Down 52.6 119.3 Up 01:30:09 - 02:00:09 10472
Lone Pine 01:45:09 -12.5 AT Down 53.2 118.8 Up 01:30:09 - 02:00:09 10398
CPSLO 01:45:30 -10.1 CT Down 52.0 114.6 Up 01:30:30 - 02:00:30 10389
Beatty 01:45:02 -13.6 AT Down 54.0 120.6 Up 01:30:02 - 02:00:02 10374
Indian Springs 01:45:00 -14.3 AT Down 54.9 121.4 Up 01:30:00 - 02:00:00 10307
Henderson 01:44:58 -14.6 AT Down 55.6 121.6 Up 01:29:58 - 01:59:58 10236
Niwot 01:43:44 -22.9 Dark Up 58.7 139.9 Up 01:28:44 - 01:58:44 10227
Wildwood 01:45:27 -11.3 CT Down 54.0 115.2 Up 01:30:27 - 02:00:27 10210
Searchlight/Boulder City 01:45:00 -14.5 AT Down 56.0 121.0 Up 01:30:00 - 02:00:00 10186
Laughlin/Bullhead City 01:45:00 -14.7 AT Down 56.4 121.0 Up 01:30:00 - 02:00:00 10148
Patrick 01:44:55 -15.3 AT Down 56.7 122.2 Up 01:29:55 - 01:59:55 10142
Kingman/Dolan Springs 01:44:58 -15.1 AT Down 56.7 121.6 Up 01:29:58 - 01:59:58 10130
Mohave Valley 01:45:01 -14.6 AT Down 56.5 120.7 Up 01:30:01 - 02:00:01 10124
Idyllwild 01:45:18 -12.6 AT Down 55.6 116.8 Up 01:30:18 - 02:00:18 10108
DCO 01:44:52 -15.7 AT Down 57.4 122.6 Up 01:29:52 - 01:59:52 10089
Lake Havasu City 01:45:02 -14.7 AT Down 56.9 120.4 Up 01:30:02 - 02:00:02 10081
Parker 01:45:04 -14.6 AT Down 57.1 120.0 Up 01:30:04 - 02:00:04 10049
Blythe 01:45:09 -14.2 AT Down 57.2 119.0 Up 01:30:09 - 02:00:09 10016
Calipatria 01:45:16 -13.3 AT Down 56.7 117.3 Up 01:30:16 - 02:00:16 10009
Yuma 01:45:13 -13.9 AT Down 57.6 117.7 Up 01:30:13 - 02:00:13 9937

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 2017/05/20 18:07:03 UT

Marc W. Buie, Southwest Research Institute

RECON