RECON: TNO occultation with 85627

Event between (85627) 98HP151 and star UC4-333-094168 with event index number of 114965

Geocentric closest approach at 2018/04/18 08:55:00 UTC

J2000 position of star is 17:06:21.7 -23:24:46
Equinox of date position of star is 17:07:25.0 -23:26:06
Stellar brightness R=16.4, use SENSEUP=128
Star is 160 degrees from the moon. Moon is 7% illuminated.
TNO apparent brightness V=23.7

[RECON map]
TNO is 41.4 AU from the Sun and 40.7 AU from the Earth.
The TNO is moving 14.1 km/sec on the sky relative to the star, or, 1.7 arcsec/hr.
The 1-sigma error in the time of the event is 1076 seconds.
The 1-sigma cross-track error in the shadow position is 3872 km.
The sky-plane scale is 29530.2 km/arcsec.

The TNO has an absolute magnitude Hv=7.4
Diameter=199.5 km assuming a 5% albedo -- 14.2 sec chord
Diameter=81.5 km assuming a 30% albedo -- 5.8 sec chord
Dynamical classification is CLASSICAL
 
 
 
 
 
 

Star training set for 85627, (2018/04/18 08:55UT)
Object            RA         Dec     mag  sep  mel
Antares        16:30:31.9 -26:28:16  0.9  8.90 165
35Eta Oph      17:11:25.7 -15:44:47  2.6  7.75 160
PPM 266403     17:07:17.5 -21:35:18  6.3  1.85 160
PPM 266382     17:06:29.0 -23:44:21  8.5  0.38 160
PPM 266406     17:07:35.1 -23:30:45  9.2  0.08 160
85627          17:07:28.3 -23:26:10 16.4       159
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 0.8 sigma about the mid-time.
The median site spacing is 10.4 km RECON observability=0.4 and success probability=0.4%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Oroville 08:58:13 -28.7 Dark Down 11.2 147.5 Really Low 08:43:13 - 09:13:13 12586
Tonasket 08:58:15 -28.9 Dark Down 11.4 147.5 Really Low 08:43:15 - 09:13:15 12576
Okanogan 08:58:16 -29.3 Dark Down 11.6 147.3 Really Low 08:43:16 - 09:13:16 12558
Brewster 08:58:18 -29.6 Dark Down 11.8 147.1 Really Low 08:43:18 - 09:13:18 12542
Manson/Chelan 08:58:19 -29.8 Dark Down 11.8 146.8 Really Low 08:43:19 - 09:13:19 12525
Entiat 08:58:19 -30.1 Dark Down 12.0 146.7 Really Low 08:43:19 - 09:13:19 12514
Wenatchee 08:58:23 -30.3 Dark Down 12.2 146.6 Really Low 08:43:23 - 09:13:23 12500
Ellensburg 08:58:24 -30.8 Dark Down 12.4 146.4 Really Low 08:43:24 - 09:13:24 12477
Pasco 08:58:21 -31.2 Dark Down 13.6 147.5 Really Low 08:43:21 - 09:13:21 12472
PNWRO 08:58:19 -31.4 Dark Down 13.9 147.7 Really Low 08:43:19 - 09:13:19 12466
Yakima 08:58:26 -31.2 Dark Down 12.8 146.3 Really Low 08:43:26 - 09:13:26 12457
George/Umatilla 08:58:22 -31.6 Dark Down 13.8 147.3 Really Low 08:43:22 - 09:13:22 12452
Toppenish/White Swan 08:58:24 -31.3 Dark Down 13.0 146.4 Really Low 08:43:24 - 09:13:24 12451
Niwot 08:57:26 -32.2 Dark Down 23.5 159.0 Low 08:42:26 - 09:12:26 12438
Goldendale 08:58:28 -31.9 Dark Down 13.3 146.0 Really Low 08:43:28 - 09:13:28 12415
The Dalles 08:58:31 -32.2 Dark Down 13.3 145.7 Really Low 08:43:31 - 09:13:31 12396
Maupin 08:58:32 -32.6 Dark Down 13.7 145.7 Really Low 08:43:32 - 09:13:32 12378
Madras/Culver 08:58:33 -33.1 Dark Down 14.2 145.6 Really Low 08:43:33 - 09:13:33 12350
Redmond 08:58:35 -33.5 Dark Down 14.4 145.5 Really Low 08:43:35 - 09:13:35 12331
Sisters 08:58:37 -33.5 Dark Down 14.3 145.2 Really Low 08:43:37 - 09:13:37 12323
Bend 08:58:35 -33.7 Dark Down 14.6 145.4 Really Low 08:43:35 - 09:13:35 12317
Oregon Observatory 08:58:37 -33.9 Dark Down 14.7 145.2 Really Low 08:43:37 - 09:13:37 12305
La Pine/Gilchrist 08:58:38 -34.1 Dark Down 14.8 145.2 Really Low 08:43:38 - 09:13:38 12293
North Lake 08:58:36 -34.4 Dark Down 15.4 145.6 Really Low 08:43:36 - 09:13:36 12284
Paisley 08:58:37 -34.9 Dark Down 16.0 145.8 Really Low 08:43:37 - 09:13:37 12263
Lakeview 08:58:37 -35.3 Dark Down 16.5 145.9 Really Low 08:43:37 - 09:13:37 12241
Chiloquin 08:58:42 -35.3 Dark Down 15.6 144.7 Really Low 08:43:42 - 09:13:42 12226
Klamath Falls 08:58:43 -35.6 Dark Down 15.9 144.7 Really Low 08:43:43 - 09:13:43 12209
Cedarville 08:58:38 -35.9 Dark Down 17.1 145.9 Really Low 08:43:38 - 09:13:38 12209
Tulelake 08:58:42 -35.8 Dark Down 16.2 144.9 Really Low 08:43:42 - 09:13:42 12201
Fall River/Burney 08:58:45 -36.6 Dark Down 17.0 144.8 Really Low 08:43:45 - 09:13:45 12153
Susanville 08:58:43 -37.1 Dark Down 17.9 145.4 Really Low 08:43:43 - 09:13:43 12135
Gimple 08:58:46 -37.4 Dark Down 18.0 145.1 Really Low 08:43:46 - 09:13:46 12114
Greenville 08:58:45 -37.4 Dark Down 18.0 145.1 Really Low 08:43:45 - 09:13:45 12112
Reno 08:58:42 -37.7 Dark Down 18.9 145.9 Really Low 08:43:42 - 09:13:42 12105
Portola 08:58:44 -37.6 Dark Down 18.4 145.4 Really Low 08:43:44 - 09:13:44 12105
Quincy 08:58:46 -37.6 Dark Down 18.1 145.0 Really Low 08:43:46 - 09:13:46 12100
Yerington 08:58:39 -38.1 Dark Down 19.7 146.3 Really Low 08:43:39 - 09:13:39 12089
Carson City 08:58:42 -38.0 Dark Down 19.2 145.9 Really Low 08:43:42 - 09:13:42 12085
Tonopah 08:58:31 -38.4 Dark Down 21.3 147.8 Low 08:43:31 - 09:13:31 12080
Hawthorne 08:58:38 -38.4 Dark Down 20.3 146.7 Low 08:43:38 - 09:13:38 12074
Gardnerville 08:58:42 -38.3 Dark Down 19.5 145.8 Really Low 08:43:42 - 09:13:42 12072
Lee Vining 08:58:42 -39.0 Dark Down 20.6 146.2 Low 08:43:42 - 09:13:42 12029
Indian Springs 08:58:28 -39.3 Dark Down 23.2 148.8 Low 08:43:28 - 09:13:28 12025
Beatty 08:58:32 -39.3 Dark Down 22.4 148.0 Low 08:43:32 - 09:13:32 12020
Bishop 08:58:40 -39.4 Dark Down 21.4 146.7 Low 08:43:40 - 09:13:40 12010
Henderson 08:58:27 -39.5 Dark Down 23.9 149.3 Low 08:43:27 - 09:13:27 12008
Patrick 08:58:21 -39.7 Dark Down 24.9 150.2 Low 08:43:21 - 09:13:21 11994
DCO 08:58:17 -39.7 Dark Down 25.5 150.7 Low 08:43:17 - 09:13:17 11991
Kingman/Dolan Springs 08:58:20 -40.0 Dark Down 25.0 150.0 Low 08:43:20 - 09:13:20 11976
Searchlight/Boulder City 08:58:26 -40.0 Dark Down 24.4 149.3 Low 08:43:26 - 09:13:26 11974
Lone Pine 08:58:40 -40.0 Dark Down 22.1 146.8 Low 08:43:40 - 09:13:40 11971
Laughlin/Bullhead City 08:58:25 -40.2 Dark Down 24.8 149.5 Low 08:43:25 - 09:13:25 11962
Mohave Valley 08:58:26 -40.4 Dark Down 25.1 149.4 Low 08:43:26 - 09:13:26 11945
Lake Havasu City 08:58:25 -40.7 Dark Down 25.5 149.6 Low 08:43:25 - 09:13:25 11925
Parker 08:58:24 -41.0 Dark Down 25.8 149.5 Low 08:43:24 - 09:13:24 11903
Blythe 08:58:28 -41.5 Dark Down 26.2 149.1 Low 08:43:28 - 09:13:28 11862
CPSLO 08:58:56 -41.9 Dark Down 22.1 144.3 Low 08:43:56 - 09:13:56 11823
Idyllwild 08:58:38 -42.2 Dark Down 25.2 147.3 Low 08:43:38 - 09:13:38 11821
Calipatria 08:58:34 -42.3 Dark Down 26.2 148.2 Low 08:43:34 - 09:13:34 11808
Yuma 08:58:29 -42.4 Dark Down 26.9 148.9 Low 08:43:29 - 09:13:29 11800
Wildwood 08:58:47 -42.5 Dark Down 24.0 145.8 Low 08:43:47 - 09:13:47 11797

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 85627, (2018/04/18 08:55UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9  8.90 165
35Eta Oph      17:10:22.7 -15:43:29  2.6  7.75 160
PPM 266403     17:06:11.8 -21:33:54  6.3  1.85 160
PPM 266382     17:05:22.3 -23:42:56  8.5  0.38 160
PPM 266406     17:06:28.5 -23:29:21  9.2  0.08 160
85627          17:06:21.7 -23:24:46 16.4       160
Positions are for J2000

Event circumstances last updated at 2017/05/18 18:01:29 UT

Marc W. Buie, Southwest Research Institute

RECON