RECON: TNO occultation with 99CY118

Event between 99CY118 and star UC4-481-054122 with event index number of 172417

Geocentric closest approach at 2018/12/16 11:33:56 UTC

J2000 position of star is 13:58:56.6 +06:10:57
Equinox of date position of star is 13:59:50.5 +06:05:45
Stellar brightness R=16.4, use SENSEUP=128
Star is 157 degrees from the moon. Moon is 60% illuminated.
TNO apparent brightness V=24.5

[RECON map]
TNO is 36.3 AU from the Sun and 36.8 AU from the Earth.
The TNO is moving 23.4 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 367 seconds.
The 1-sigma cross-track error in the shadow position is 2104 km.
The sky-plane scale is 26692.5 km/arcsec.

The TNO has an absolute magnitude Hv=8.7
Diameter=111.7 km assuming a 5% albedo -- 4.8 sec chord
Diameter=45.6 km assuming a 30% albedo -- 1.9 sec chord
Dynamical classification is SCATNEAR
 
 
 
 
 
 

Star training set for 99CY118, (2018/12/16 11:34UT)
Object            RA         Dec     mag  sep  mel
Arcturus       14:16:31.7 +19:05:06  0.0 13.61 149
Vindemiatrix   13:03:07.3 +10:51:27  2.8 14.82 168
PPM 160305     14:04:52.9 +04:48:38  6.2  1.78 156
PPM 160224     14:00:22.8 +05:36:46  8.4  0.49 157
PPM 160204     13:59:02.3 +06:28:10  9.7  0.43 157
PPM 160200     13:58:42.0 +06:04:29 10.1  0.30 157
99CY118        13:59:53.5 +06:05:27 16.4       157
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 2.4 sigma about the mid-time.
The median site spacing is 34.5 km RECON observability=0.3 and success probability=6.7%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Oroville 11:31:18 -40.5 Dark Down 16.9 100.2 Really Low 11:16:18 - 11:46:18 -248
Tonasket 11:31:17 -40.5 Dark Down 16.9 100.1 Really Low 11:16:17 - 11:46:17 -265
Okanogan 11:31:16 -40.7 Dark Down 16.9 99.9 Really Low 11:16:16 - 11:46:16 -287
Brewster 11:31:14 -40.8 Dark Down 16.8 99.7 Really Low 11:16:14 - 11:46:14 -305
Manson/Chelan 11:31:13 -41.1 Dark Down 16.6 99.3 Really Low 11:16:13 - 11:46:13 -317
Entiat 11:31:12 -41.2 Dark Down 16.6 99.2 Really Low 11:16:12 - 11:46:12 -332
Wenatchee 11:31:11 -41.3 Dark Down 16.6 99.1 Really Low 11:16:11 - 11:46:11 -350
Ellensburg 11:31:09 -41.6 Dark Down 16.5 98.8 Really Low 11:16:09 - 11:46:09 -378
Yakima 11:31:08 -41.6 Dark Down 16.5 98.6 Really Low 11:16:08 - 11:46:08 -408
Toppenish/White Swan 11:31:08 -41.6 Dark Down 16.7 98.7 Really Low 11:16:08 - 11:46:08 -425
Pasco 11:31:09 -40.7 Dark Down 17.5 99.6 Really Low 11:16:09 - 11:46:09 -446
Goldendale 11:31:05 -42.0 Dark Down 16.4 98.2 Really Low 11:16:05 - 11:46:05 -463
PNWRO 11:31:08 -40.6 Dark Down 17.7 99.7 Really Low 11:16:08 - 11:46:08 -467
George/Umatilla 11:31:07 -40.9 Dark Down 17.4 99.3 Really Low 11:16:07 - 11:46:07 -469
The Dalles 11:31:04 -42.2 Dark Down 16.2 97.9 Really Low 11:16:04 - 11:46:04 -476
Maupin 11:31:03 -42.2 Dark Down 16.3 97.8 Really Low 11:16:03 - 11:46:03 -509
Madras/Culver 11:31:01 -42.4 Dark Down 16.4 97.6 Really Low 11:16:01 - 11:46:01 -550
Sisters 11:30:59 -42.7 Dark Down 16.1 97.2 Really Low 11:15:59 - 11:45:59 -572
Redmond 11:31:00 -42.5 Dark Down 16.4 97.5 Really Low 11:16:00 - 11:46:00 -577
Bend 11:30:59 -42.6 Dark Down 16.3 97.3 Really Low 11:15:59 - 11:45:59 -592
Oregon Observatory 11:30:58 -42.7 Dark Down 16.2 97.2 Really Low 11:15:58 - 11:45:58 -605
La Pine/Gilchrist 11:30:57 -42.8 Dark Down 16.2 97.0 Really Low 11:15:57 - 11:45:57 -620
North Lake 11:30:56 -42.4 Dark Down 16.7 97.3 Really Low 11:15:56 - 11:45:56 -660
Chiloquin 11:30:53 -43.2 Dark Down 16.1 96.5 Really Low 11:15:53 - 11:45:53 -704
Paisley 11:30:55 -42.2 Dark Down 17.0 97.4 Really Low 11:15:55 - 11:45:55 -707
Klamath Falls 11:30:52 -43.2 Dark Down 16.2 96.4 Really Low 11:15:52 - 11:45:52 -732
Lakeview 11:30:54 -42.1 Dark Down 17.2 97.4 Really Low 11:15:54 - 11:45:54 -749
Tulelake 11:30:52 -43.0 Dark Down 16.4 96.5 Really Low 11:15:52 - 11:45:52 -756
Cedarville 11:30:51 -42.1 Dark Down 17.4 97.3 Really Low 11:15:51 - 11:45:51 -804
Fall River/Burney 11:30:49 -43.0 Dark Down 16.6 96.3 Really Low 11:15:49 - 11:45:49 -831
Susanville 11:30:48 -42.5 Dark Down 17.2 96.6 Really Low 11:15:48 - 11:45:48 -890
Greenville 11:30:46 -42.8 Dark Down 17.0 96.4 Really Low 11:15:46 - 11:45:46 -909
Gimple 11:30:47 -42.7 Dark Down 17.1 96.4 Really Low 11:15:47 - 11:45:47 -910
Quincy 11:30:46 -42.8 Dark Down 17.0 96.3 Really Low 11:15:46 - 11:45:46 -926
Portola 11:30:46 -42.4 Dark Down 17.4 96.6 Really Low 11:15:46 - 11:45:46 -941
Reno 11:30:46 -41.9 Dark Down 17.9 96.9 Really Low 11:15:46 - 11:45:46 -970
Carson City 11:30:45 -42.0 Dark Down 18.0 96.8 Really Low 11:15:45 - 11:45:45 -1000
Gardnerville 11:30:44 -41.9 Dark Down 18.1 96.8 Really Low 11:15:44 - 11:45:44 -1021
Yerington 11:30:45 -41.5 Dark Down 18.5 97.2 Really Low 11:15:45 - 11:45:45 -1023
Hawthorne 11:30:44 -41.1 Dark Down 19.0 97.4 Really Low 11:15:44 - 11:45:44 -1068
Niwot 11:31:10 -30.6 Dark Down 28.9 107.7 Low 11:16:10 - 11:46:10 -1073
Lee Vining 11:30:42 -41.5 Dark Down 18.7 96.8 Really Low 11:15:42 - 11:45:42 -1111
Tonopah 11:30:44 -40.0 Dark Down 20.1 98.1 Low 11:15:44 - 11:45:44 -1123
Bishop 11:30:41 -40.9 Dark Down 19.3 97.1 Really Low 11:15:41 - 11:45:41 -1170
Beatty 11:30:42 -39.6 Dark Down 20.7 98.0 Low 11:15:42 - 11:45:42 -1228
Lone Pine 11:30:39 -40.6 Dark Down 19.6 97.1 Really Low 11:15:39 - 11:45:39 -1240
Indian Springs 11:30:42 -38.7 Dark Down 21.6 98.6 Low 11:15:42 - 11:45:42 -1268
Henderson 11:30:42 -38.1 Dark Down 22.2 98.8 Low 11:15:42 - 11:45:42 -1322
CPSLO 11:30:32 -42.8 Dark Down 17.7 95.0 Really Low 11:15:32 - 11:45:32 -1326
Searchlight/Boulder City 11:30:40 -38.1 Dark Down 22.3 98.6 Low 11:15:40 - 11:45:40 -1374
Patrick 11:30:42 -37.2 Dark Down 23.2 99.3 Low 11:15:42 - 11:45:42 -1390
Laughlin/Bullhead City 11:30:40 -37.8 Dark Down 22.6 98.7 Low 11:15:40 - 11:45:40 -1404
Kingman/Dolan Springs 11:30:40 -37.3 Dark Down 23.1 99.0 Low 11:15:40 - 11:45:40 -1408
DCO 11:30:42 -36.6 Dark Down 23.8 99.6 Low 11:15:42 - 11:45:42 -1425
Mohave Valley 11:30:39 -37.7 Dark Down 22.7 98.6 Low 11:15:39 - 11:45:39 -1428
Wildwood 11:30:31 -41.0 Dark Down 19.5 95.8 Really Low 11:15:31 - 11:45:31 -1456
Lake Havasu City 11:30:38 -37.5 Dark Down 23.0 98.6 Low 11:15:38 - 11:45:38 -1467
Parker 11:30:37 -37.5 Dark Down 23.0 98.4 Low 11:15:37 - 11:45:37 -1499
Idyllwild 11:30:33 -39.4 Dark Down 21.1 96.8 Low 11:15:33 - 11:45:33 -1509
Blythe 11:30:36 -37.7 Dark Down 22.8 98.0 Low 11:15:36 - 11:45:36 -1544
Calipatria 11:30:33 -38.4 Dark Down 22.1 97.3 Low 11:15:33 - 11:45:33 -1578
Yuma 11:30:33 -37.6 Dark Down 22.9 97.6 Low 11:15:33 - 11:45:33 -1628

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 99CY118, (2018/12/16 11:34UT)
Object            RA         Dec     mag  sep  mel
Arcturus       14:15:38.3 +19:10:21  0.0 13.61 149
Vindemiatrix   13:02:10.3 +10:57:33  2.8 14.82 168
PPM 160305     14:03:55.7 +04:54:03  6.2  1.78 156
PPM 160224     13:59:25.7 +05:42:16  8.4  0.49 157
PPM 160204     13:58:05.5 +06:33:40  9.7  0.43 157
PPM 160200     13:57:45.0 +06:10:00 10.1  0.30 157
99CY118        13:58:56.6 +06:10:57 16.4       157
Positions are for J2000

Event circumstances last updated at 2017/12/05 19:07:08 UT

Marc W. Buie, Southwest Research Institute

RECON