RECON: TNO occultation with 120216

Event between (120216) 04EW95 and star UC4-305-078724 with event index number of 109264

Geocentric closest approach at 2018/03/25 10:56:44 UTC

J2000 position of star is 14:51:09.7 -29:00:49
Equinox of date position of star is 14:52:13.8 -29:05:12
Stellar brightness R=15.0, use SENSEUP=128
Star is 122 degrees from the moon. Moon is 59% illuminated.
TNO apparent brightness V=20.7

[RECON map]
TNO is 27.0 AU from the Sun and 26.3 AU from the Earth.
The TNO is moving 16.8 km/sec on the sky relative to the star, or, 3.2 arcsec/hr.
The 1-sigma error in the time of the event is 144 seconds.
The 1-sigma cross-track error in the shadow position is 2398 km.
The sky-plane scale is 19053.3 km/arcsec.

The TNO has an absolute magnitude Hv=6.3
Diameter=331.1 km assuming a 5% albedo -- 19.7 sec chord
Diameter=135.2 km assuming a 30% albedo -- 8.1 sec chord
Dynamical classification is 3:2E
 
 
 
 
 
 

Star training set for 120216, (2018/03/25 10:57UT)
Object            RA         Dec     mag  sep  mel
Antares        16:30:31.7 -26:28:15  0.9 21.86 144
5The Cen       14:07:45.7 -36:27:32  2.1 11.89 114
58 Hya         14:51:21.9 -28:02:07  4.6  1.07 122
PPM 263444     14:51:02.8 -29:06:33  7.3  0.26 122
PPM 263466     14:52:05.4 -29:03:25  9.6  0.05 122
120216         14:52:14.9 -29:05:17 15.0       122
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 12.2 km RECON observability=0.5 and success probability=1.5%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Oroville 10:55:31 -27.1 Dark Down 11.9 184.0 Really Low 10:43:00 - 11:08:02 5998
Tonasket 10:55:31 -27.3 Dark Down 12.2 184.0 Really Low 10:43:00 - 11:08:02 5992
Okanogan 10:55:31 -27.6 Dark Down 12.5 183.9 Really Low 10:43:00 - 11:08:02 5986
Brewster 10:55:32 -27.8 Dark Down 12.8 183.7 Really Low 10:43:01 - 11:08:03 5982
Manson/Chelan 10:55:33 -28.2 Dark Down 13.0 183.4 Really Low 10:43:02 - 11:08:04 5981
Entiat 10:55:34 -28.3 Dark Down 13.2 183.4 Really Low 10:43:03 - 11:08:05 5977
Wenatchee 10:55:35 -28.5 Dark Down 13.5 183.3 Really Low 10:43:04 - 11:08:06 5971
Ellensburg 10:55:35 -28.9 Dark Down 13.9 183.1 Really Low 10:43:04 - 11:08:06 5963
Yakima 10:55:35 -29.2 Dark Down 14.3 183.1 Really Low 10:43:04 - 11:08:06 5952
Toppenish/White Swan 10:55:35 -29.3 Dark Down 14.5 183.2 Really Low 10:43:04 - 11:08:06 5944
Goldendale 10:55:37 -29.8 Dark Down 15.1 182.9 Really Low 10:43:06 - 11:08:08 5934
The Dalles 10:55:38 -30.2 Dark Down 15.3 182.5 Really Low 10:43:07 - 11:08:09 5932
Pasco 10:55:29 -28.7 Dark Down 14.6 184.4 Really Low 10:42:58 - 11:08:00 5922
Maupin 10:55:37 -30.4 Dark Down 15.8 182.6 Really Low 10:43:06 - 11:08:08 5918
George/Umatilla 10:55:30 -29.0 Dark Down 15.0 184.2 Really Low 10:42:59 - 11:08:01 5916
PNWRO 10:55:28 -28.7 Dark Down 14.8 184.6 Really Low 10:42:57 - 11:07:59 5912
Madras/Culver 10:55:38 -30.8 Dark Down 16.3 182.6 Really Low 10:43:07 - 11:08:09 5902
Sisters 10:55:40 -31.2 Dark Down 16.7 182.2 Really Low 10:43:09 - 11:08:11 5897
Redmond 10:55:38 -31.0 Dark Down 16.7 182.6 Really Low 10:43:07 - 11:08:09 5891
Bend 10:55:39 -31.2 Dark Down 16.9 182.4 Really Low 10:43:08 - 11:08:10 5886
Oregon Observatory 10:55:39 -31.4 Dark Down 17.1 182.3 Really Low 10:43:08 - 11:08:10 5882
La Pine/Gilchrist 10:55:40 -31.6 Dark Down 17.3 182.3 Really Low 10:43:09 - 11:08:11 5876
North Lake 10:55:37 -31.5 Dark Down 17.7 182.8 Really Low 10:43:06 - 11:08:08 5853
Chiloquin 10:55:42 -32.5 Dark Down 18.4 182.0 Really Low 10:43:11 - 11:08:13 5843
Klamath Falls 10:55:41 -32.6 Dark Down 18.7 182.0 Really Low 10:43:10 - 11:08:12 5830
Paisley 10:55:35 -31.7 Dark Down 18.2 183.1 Really Low 10:43:04 - 11:08:06 5829
Tulelake 10:55:40 -32.6 Dark Down 19.0 182.3 Really Low 10:43:09 - 11:08:11 5816
Lakeview 10:55:35 -31.9 Dark Down 18.7 183.3 Really Low 10:43:04 - 11:08:06 5808
Cedarville 10:55:33 -32.2 Dark Down 19.4 183.5 Really Low 10:43:02 - 11:08:04 5782
Fall River/Burney 10:55:39 -33.2 Dark Down 19.9 182.4 Really Low 10:43:08 - 11:08:10 5782
Susanville 10:55:36 -33.1 Dark Down 20.5 183.1 Low 10:43:05 - 11:08:07 5747
Greenville 10:55:38 -33.5 Dark Down 20.8 182.8 Low 10:43:07 - 11:08:09 5740
Gimple 10:55:37 -33.4 Dark Down 20.8 182.9 Low 10:43:06 - 11:08:08 5739
Quincy 10:55:38 -33.6 Dark Down 21.0 182.8 Low 10:43:07 - 11:08:09 5732
Portola 10:55:35 -33.4 Dark Down 21.1 183.3 Low 10:43:04 - 11:08:06 5720
Reno 10:55:32 -33.1 Dark Down 21.3 183.9 Low 10:43:01 - 11:08:03 5699
Carson City 10:55:32 -33.3 Dark Down 21.7 183.9 Low 10:43:01 - 11:08:03 5684
Gardnerville 10:55:32 -33.4 Dark Down 21.9 184.0 Low 10:43:01 - 11:08:03 5673
Yerington 10:55:28 -33.1 Dark Down 21.8 184.5 Low 10:42:57 - 11:07:59 5666
Hawthorne 10:55:27 -33.0 Dark Down 22.3 185.0 Low 10:42:56 - 11:07:58 5637
Lee Vining 10:55:28 -33.6 Dark Down 22.9 184.6 Low 10:42:57 - 11:07:59 5621
Tonopah 10:55:20 -32.3 Dark Down 22.6 186.3 Low 10:42:49 - 11:07:51 5593
Bishop 10:55:25 -33.5 Dark Down 23.4 185.3 Low 10:42:54 - 11:07:56 5582
Lone Pine 10:55:24 -33.7 Dark Down 24.2 185.6 Low 10:42:53 - 11:07:55 5542
Beatty 10:55:17 -32.7 Dark Down 23.7 186.8 Low 10:42:46 - 11:07:48 5532
CPSLO 10:55:37 -36.1 Dark Down 25.6 183.2 Low 10:43:06 - 11:08:08 5524
Indian Springs 10:55:12 -32.1 Dark Down 24.0 187.8 Low 10:42:41 - 11:07:43 5497
Henderson 10:55:08 -31.9 Dark Down 24.4 188.5 Low 10:42:37 - 11:07:39 5458
Wildwood 10:55:27 -35.4 Dark Down 26.7 185.2 Low 10:42:56 - 11:07:58 5430
Searchlight/Boulder City 10:55:07 -32.2 Dark Down 25.0 188.6 Low 10:42:36 - 11:07:38 5429
Niwot 10:54:23 -23.3 Dark Down 18.8 197.0 Really Low 10:41:52 - 11:06:54 5425
Laughlin/Bullhead City 10:55:06 -32.1 Dark Down 25.2 189.0 Low 10:42:35 - 11:07:37 5407
Patrick 10:55:02 -31.4 Dark Down 24.9 189.6 Low 10:42:31 - 11:07:33 5405
Kingman/Dolan Springs 10:55:04 -31.7 Dark Down 25.1 189.4 Low 10:42:33 - 11:07:35 5398
Mohave Valley 10:55:06 -32.2 Dark Down 25.5 189.0 Low 10:42:35 - 11:07:37 5394
Idyllwild 10:55:17 -34.3 Dark Down 26.9 187.0 Low 10:42:46 - 11:07:48 5377
DCO 10:54:59 -31.1 Dark Down 25.1 190.3 Low 10:42:28 - 11:07:30 5375
Lake Havasu City 10:55:05 -32.2 Dark Down 25.9 189.2 Low 10:42:34 - 11:07:36 5368
Parker 10:55:05 -32.4 Dark Down 26.2 189.3 Low 10:42:34 - 11:07:36 5350
Blythe 10:55:06 -32.8 Dark Down 26.8 189.1 Low 10:42:35 - 11:07:37 5329
Calipatria 10:55:10 -33.7 Dark Down 27.4 188.2 Low 10:42:39 - 11:07:41 5322
Yuma 10:55:06 -33.3 Dark Down 27.7 189.1 Low 10:42:35 - 11:07:37 5281

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 120216, (2018/03/25 10:57UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9 21.86 144
5The Cen       14:06:40.2 -36:22:21  2.1 11.89 114
58 Hya         14:50:17.0 -27:57:38  4.6  1.07 122
PPM 263444     14:49:57.5 -29:02:04  7.3  0.26 122
PPM 263466     14:51:00.2 -28:58:57  9.6  0.05 122
120216         14:51:09.7 -29:00:49 15.0       122
Positions are for J2000

Event circumstances last updated at 2017/12/02 17:23:01 UT

Marc W. Buie, Southwest Research Institute

RECON