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 17:07:26.9 -23:26:09
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 1067 seconds.
The 1-sigma cross-track error in the shadow position is 3843 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 10.7 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 08:58:15 -28.7 Dark Down 11.2 147.5 Really Low 08:43:15 - 09:13:15 12580
Tonasket 08:58:13 -28.9 Dark Down 11.4 147.5 Really Low 08:43:13 - 09:13:13 12570
Okanogan 08:58:17 -29.3 Dark Down 11.6 147.3 Really Low 08:43:17 - 09:13:17 12552
Brewster 08:58:17 -29.6 Dark Down 11.8 147.1 Really Low 08:43:17 - 09:13:17 12536
Manson/Chelan 08:58:22 -29.8 Dark Down 11.8 146.8 Really Low 08:43:22 - 09:13:22 12519
Entiat 08:58:21 -30.1 Dark Down 12.0 146.7 Really Low 08:43:21 - 09:13:21 12507
Wenatchee 08:58:23 -30.3 Dark Down 12.2 146.6 Really Low 08:43:23 - 09:13:23 12494
Ellensburg 08:58:25 -30.8 Dark Down 12.4 146.4 Really Low 08:43:25 - 09:13:25 12470
Pasco 08:58:21 -31.2 Dark Down 13.6 147.5 Really Low 08:43:21 - 09:13:21 12466
PNWRO 08:58:20 -31.4 Dark Down 13.9 147.7 Really Low 08:43:20 - 09:13:20 12459
Yakima 08:58:27 -31.2 Dark Down 12.8 146.3 Really Low 08:43:27 - 09:13:27 12451
George/Umatilla 08:58:24 -31.6 Dark Down 13.8 147.3 Really Low 08:43:24 - 09:13:24 12445
Toppenish/White Swan 08:58:27 -31.3 Dark Down 13.0 146.4 Really Low 08:43:27 - 09:13:27 12444
Niwot 08:57:29 -32.2 Dark Down 23.5 159.0 Low 08:42:29 - 09:12:29 12431
Goldendale 08:58:31 -31.9 Dark Down 13.3 146.0 Really Low 08:43:31 - 09:13:31 12408
The Dalles 08:58:31 -32.2 Dark Down 13.3 145.7 Really Low 08:43:31 - 09:13:31 12389
Maupin 08:58:34 -32.6 Dark Down 13.7 145.7 Really Low 08:43:34 - 09:13:34 12371
Madras/Culver 08:58:35 -33.1 Dark Down 14.2 145.6 Really Low 08:43:35 - 09:13:35 12343
Redmond 08:58:35 -33.5 Dark Down 14.4 145.5 Really Low 08:43:35 - 09:13:35 12323
Sisters 08:58:38 -33.5 Dark Down 14.3 145.2 Really Low 08:43:38 - 09:13:38 12315
Bend 08:58:37 -33.7 Dark Down 14.6 145.4 Really Low 08:43:37 - 09:13:37 12309
Oregon Observatory 08:58:39 -33.9 Dark Down 14.7 145.2 Really Low 08:43:39 - 09:13:39 12297
La Pine/Gilchrist 08:58:39 -34.1 Dark Down 14.8 145.2 Really Low 08:43:39 - 09:13:39 12285
North Lake 08:58:38 -34.4 Dark Down 15.4 145.6 Really Low 08:43:38 - 09:13:38 12276
Paisley 08:58:38 -34.9 Dark Down 16.0 145.8 Really Low 08:43:38 - 09:13:38 12256
Lakeview 08:58:38 -35.3 Dark Down 16.5 145.9 Really Low 08:43:38 - 09:13:38 12233
Chiloquin 08:58:44 -35.3 Dark Down 15.6 144.7 Really Low 08:43:44 - 09:13:44 12218
Klamath Falls 08:58:43 -35.6 Dark Down 15.9 144.7 Really Low 08:43:43 - 09:13:43 12201
Cedarville 08:58:39 -35.9 Dark Down 17.1 145.9 Really Low 08:43:39 - 09:13:39 12201
Tulelake 08:58:44 -35.8 Dark Down 16.2 144.9 Really Low 08:43:44 - 09:13:44 12194
Fall River/Burney 08:58:46 -36.6 Dark Down 17.0 144.8 Really Low 08:43:46 - 09:13:46 12145
Susanville 08:58:43 -37.1 Dark Down 17.9 145.4 Really Low 08:43:43 - 09:13:43 12127
Gimple 08:58:46 -37.4 Dark Down 18.0 145.1 Really Low 08:43:46 - 09:13:46 12106
Greenville 08:58:46 -37.4 Dark Down 18.0 145.1 Really Low 08:43:46 - 09:13:46 12104
Reno 08:58:42 -37.7 Dark Down 18.9 145.9 Really Low 08:43:42 - 09:13:42 12097
Portola 08:58:46 -37.6 Dark Down 18.4 145.4 Really Low 08:43:46 - 09:13:46 12097
Quincy 08:58:48 -37.6 Dark Down 18.1 145.0 Really Low 08:43:48 - 09:13:48 12093
Yerington 08:58:40 -38.1 Dark Down 19.7 146.3 Really Low 08:43:40 - 09:13:40 12081
Carson City 08:58:43 -38.0 Dark Down 19.2 145.9 Really Low 08:43:43 - 09:13:43 12077
Tonopah 08:58:33 -38.4 Dark Down 21.3 147.8 Low 08:43:33 - 09:13:33 12072
Hawthorne 08:58:40 -38.3 Dark Down 20.3 146.7 Low 08:43:40 - 09:13:40 12066
Gardnerville 08:58:43 -38.2 Dark Down 19.5 145.8 Really Low 08:43:43 - 09:13:43 12064
Lee Vining 08:58:43 -39.0 Dark Down 20.6 146.2 Low 08:43:43 - 09:13:43 12020
Indian Springs 08:58:30 -39.3 Dark Down 23.2 148.9 Low 08:43:30 - 09:13:30 12018
Beatty 08:58:34 -39.3 Dark Down 22.4 148.0 Low 08:43:34 - 09:13:34 12013
Bishop 08:58:42 -39.4 Dark Down 21.4 146.7 Low 08:43:42 - 09:13:42 12002
Henderson 08:58:26 -39.5 Dark Down 23.9 149.3 Low 08:43:26 - 09:13:26 12001
Patrick 08:58:22 -39.7 Dark Down 24.9 150.2 Low 08:43:22 - 09:13:22 11987
DCO 08:58:20 -39.7 Dark Down 25.5 150.8 Low 08:43:20 - 09:13:20 11984
Kingman/Dolan Springs 08:58:25 -40.0 Dark Down 25.0 150.0 Low 08:43:25 - 09:13:25 11969
Searchlight/Boulder City 08:58:29 -40.0 Dark Down 24.4 149.3 Low 08:43:29 - 09:13:29 11966
Lone Pine 08:58:42 -40.0 Dark Down 22.2 146.8 Low 08:43:42 - 09:13:42 11963
Laughlin/Bullhead City 08:58:26 -40.2 Dark Down 24.8 149.5 Low 08:43:26 - 09:13:26 11956
Mohave Valley 08:58:27 -40.4 Dark Down 25.1 149.4 Low 08:43:27 - 09:13:27 11939
Lake Havasu City 08:58:27 -40.7 Dark Down 25.5 149.6 Low 08:43:27 - 09:13:27 11919
Parker 08:58:27 -41.0 Dark Down 25.8 149.5 Low 08:43:27 - 09:13:27 11897
Blythe 08:58:31 -41.5 Dark Down 26.2 149.1 Low 08:43:31 - 09:13:31 11856
CPSLO 08:58:57 -41.9 Dark Down 22.1 144.3 Low 08:43:57 - 09:13:57 11816
Idyllwild 08:58:40 -42.2 Dark Down 25.2 147.3 Low 08:43:40 - 09:13:40 11813
Calipatria 08:58:35 -42.3 Dark Down 26.2 148.2 Low 08:43:35 - 09:13:35 11801
Yuma 08:58:31 -42.4 Dark Down 26.9 148.9 Low 08:43:31 - 09:13:31 11794
Wildwood 08:58:49 -42.5 Dark Down 24.0 145.8 Low 08:43:49 - 09:13:49 11789

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 2017/12/02 17:27:07 UT

Marc W. Buie, Southwest Research Institute

RECON