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 10:56:20 UTC

J2000 position of star is 14:51:09.7 -29:00:49
Equinox of date position of star is 14:52:11.9 -29:05:04
Stellar brightness R=15.0, use SENSEUP=128
Star is 122 degrees from the moon. Moon is 59% illuminated.
TNO apparent brightness V=20.9

[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 124 seconds.
The 1-sigma cross-track error in the shadow position is 2069 km.
The sky-plane scale is 19053.3 km/arcsec.

The TNO has an absolute magnitude Hv=6.5
Diameter=302.0 km assuming a 5% albedo -- 18.0 sec chord
Diameter=123.3 km assuming a 30% albedo -- 7.3 sec chord
Dynamical classification is 3:2E
 
 
 
 
 
 

Star training set for 120216, (2018/03/25 10:56UT)
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 11.8 km RECON observability=0.5 and success probability=1.2%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Oroville 10:55:06 -27.2 Dark Down 12.0 183.9 Really Low 10:44:14 - 11:05:58 5868
Tonasket 10:55:06 -27.3 Dark Down 12.2 183.9 Really Low 10:44:14 - 11:05:58 5863
Okanogan 10:55:07 -27.6 Dark Down 12.5 183.8 Really Low 10:44:15 - 11:05:59 5856
Brewster 10:55:08 -27.9 Dark Down 12.8 183.6 Really Low 10:44:16 - 11:06:00 5852
Manson/Chelan 10:55:09 -28.2 Dark Down 13.0 183.3 Really Low 10:44:17 - 11:06:01 5852
Entiat 10:55:09 -28.4 Dark Down 13.3 183.3 Really Low 10:44:17 - 11:06:01 5847
Wenatchee 10:55:10 -28.6 Dark Down 13.5 183.2 Really Low 10:44:18 - 11:06:02 5842
Ellensburg 10:55:11 -29.0 Dark Down 13.9 183.0 Really Low 10:44:19 - 11:06:03 5834
Yakima 10:55:11 -29.3 Dark Down 14.3 183.0 Really Low 10:44:19 - 11:06:03 5823
Toppenish/White Swan 10:55:10 -29.3 Dark Down 14.5 183.1 Really Low 10:44:18 - 11:06:02 5814
Goldendale 10:55:12 -29.9 Dark Down 15.1 182.8 Really Low 10:44:20 - 11:06:04 5804
The Dalles 10:55:13 -30.2 Dark Down 15.4 182.4 Really Low 10:44:21 - 11:06:05 5802
Pasco 10:55:04 -28.7 Dark Down 14.6 184.3 Really Low 10:44:12 - 11:05:56 5793
Maupin 10:55:13 -30.4 Dark Down 15.8 182.5 Really Low 10:44:21 - 11:06:05 5789
George/Umatilla 10:55:05 -29.0 Dark Down 15.0 184.1 Really Low 10:44:13 - 11:05:57 5786
PNWRO 10:55:03 -28.7 Dark Down 14.8 184.5 Really Low 10:44:11 - 11:05:55 5782
Madras/Culver 10:55:14 -30.8 Dark Down 16.3 182.5 Really Low 10:44:22 - 11:06:06 5773
Sisters 10:55:16 -31.3 Dark Down 16.7 182.1 Really Low 10:44:24 - 11:06:08 5769
Redmond 10:55:14 -31.1 Dark Down 16.7 182.5 Really Low 10:44:22 - 11:06:06 5762
Bend 10:55:13 -31.3 Dark Down 16.9 182.3 Really Low 10:44:21 - 11:06:05 5757
Oregon Observatory 10:55:15 -31.5 Dark Down 17.1 182.2 Really Low 10:44:23 - 11:06:07 5754
La Pine/Gilchrist 10:55:15 -31.6 Dark Down 17.3 182.2 Really Low 10:44:23 - 11:06:07 5748
North Lake 10:55:13 -31.6 Dark Down 17.7 182.7 Really Low 10:44:21 - 11:06:05 5725
Chiloquin 10:55:17 -32.5 Dark Down 18.4 181.9 Really Low 10:44:25 - 11:06:09 5715
Klamath Falls 10:55:17 -32.7 Dark Down 18.7 181.9 Really Low 10:44:25 - 11:06:09 5702
Paisley 10:55:11 -31.7 Dark Down 18.2 183.1 Really Low 10:44:19 - 11:06:03 5701
Tulelake 10:55:15 -32.7 Dark Down 19.0 182.2 Really Low 10:44:23 - 11:06:07 5688
Lakeview 10:55:10 -31.9 Dark Down 18.7 183.2 Really Low 10:44:18 - 11:06:02 5680
Cedarville 10:55:09 -32.2 Dark Down 19.4 183.4 Really Low 10:44:17 - 11:06:01 5653
Fall River/Burney 10:55:15 -33.2 Dark Down 19.9 182.3 Really Low 10:44:23 - 11:06:07 5653
Susanville 10:55:11 -33.2 Dark Down 20.5 183.0 Low 10:44:19 - 11:06:03 5618
Greenville 10:55:13 -33.5 Dark Down 20.8 182.7 Low 10:44:21 - 11:06:05 5611
Gimple 10:55:13 -33.5 Dark Down 20.8 182.8 Low 10:44:21 - 11:06:05 5610
Quincy 10:55:13 -33.6 Dark Down 21.0 182.7 Low 10:44:21 - 11:06:05 5603
Portola 10:55:11 -33.4 Dark Down 21.1 183.2 Low 10:44:19 - 11:06:03 5591
Reno 10:55:08 -33.2 Dark Down 21.3 183.8 Low 10:44:16 - 11:06:00 5570
Carson City 10:55:07 -33.4 Dark Down 21.7 183.8 Low 10:44:15 - 11:05:59 5555
Gardnerville 10:55:08 -33.5 Dark Down 21.9 183.9 Low 10:44:16 - 11:06:00 5544
Yerington 10:55:04 -33.1 Dark Down 21.9 184.4 Low 10:44:12 - 11:05:56 5537
Hawthorne 10:55:01 -33.1 Dark Down 22.3 184.9 Low 10:44:09 - 11:05:53 5508
Lee Vining 10:55:04 -33.7 Dark Down 22.9 184.5 Low 10:44:12 - 11:05:56 5492
Tonopah 10:54:55 -32.4 Dark Down 22.6 186.2 Low 10:44:03 - 11:05:47 5464
Bishop 10:55:01 -33.6 Dark Down 23.4 185.2 Low 10:44:09 - 11:05:53 5453
Lone Pine 10:54:59 -33.8 Dark Down 24.2 185.5 Low 10:44:07 - 11:05:51 5412
Beatty 10:54:52 -32.7 Dark Down 23.8 186.7 Low 10:44:00 - 11:05:44 5402
CPSLO 10:55:13 -36.2 Dark Down 25.6 183.1 Low 10:44:21 - 11:06:05 5394
Indian Springs 10:54:47 -32.2 Dark Down 24.0 187.7 Low 10:43:55 - 11:05:39 5367
Henderson 10:54:43 -32.0 Dark Down 24.4 188.4 Low 10:43:51 - 11:05:35 5327
Wildwood 10:55:02 -35.5 Dark Down 26.7 185.1 Low 10:44:10 - 11:05:54 5300
Searchlight/Boulder City 10:54:43 -32.2 Dark Down 25.0 188.5 Low 10:43:51 - 11:05:35 5299
Niwot 10:53:58 -23.4 Dark Down 18.8 196.9 Really Low 10:43:06 - 11:04:50 5295
Laughlin/Bullhead City 10:54:41 -32.1 Dark Down 25.2 188.9 Low 10:43:49 - 11:05:33 5276
Patrick 10:54:37 -31.5 Dark Down 24.9 189.5 Low 10:43:45 - 11:05:29 5274
Kingman/Dolan Springs 10:54:38 -31.8 Dark Down 25.2 189.3 Low 10:43:46 - 11:05:30 5268
Mohave Valley 10:54:41 -32.3 Dark Down 25.5 188.9 Low 10:43:49 - 11:05:33 5263
Idyllwild 10:54:52 -34.3 Dark Down 26.9 186.9 Low 10:44:00 - 11:05:44 5248
DCO 10:54:33 -31.2 Dark Down 25.1 190.2 Low 10:43:41 - 11:05:25 5245
Lake Havasu City 10:54:40 -32.3 Dark Down 25.9 189.1 Low 10:43:48 - 11:05:32 5237
Parker 10:54:40 -32.4 Dark Down 26.2 189.2 Low 10:43:48 - 11:05:32 5219
Blythe 10:54:41 -32.9 Dark Down 26.8 189.0 Low 10:43:49 - 11:05:33 5198
Calipatria 10:54:46 -33.8 Dark Down 27.4 188.1 Low 10:43:54 - 11:05:38 5191
Yuma 10:54:40 -33.4 Dark Down 27.7 189.0 Low 10:43:48 - 11:05:32 5150

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 10:56UT)
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 2017/05/18 18:00:26 UT

Marc W. Buie, Southwest Research Institute

RECON