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 13:59:48.8 +06:05:54
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 +19:05:07  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 2.5 sigma about the mid-time.
The median site spacing is 35.1 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 -251
Tonasket 11:31:17 -40.5 Dark Down 16.9 100.2 Really Low 11:16:17 - 11:46:17 -267
Okanogan 11:31:17 -40.7 Dark Down 16.9 99.9 Really Low 11:16:17 - 11:46:17 -290
Brewster 11:31:15 -40.8 Dark Down 16.8 99.7 Really Low 11:16:15 - 11:46:15 -308
Manson/Chelan 11:31:14 -41.1 Dark Down 16.6 99.3 Really Low 11:16:14 - 11:46:14 -319
Entiat 11:31:13 -41.2 Dark Down 16.6 99.2 Really Low 11:16:13 - 11:46:13 -335
Wenatchee 11:31:12 -41.3 Dark Down 16.6 99.1 Really Low 11:16:12 - 11:46:12 -352
Ellensburg 11:31:10 -41.6 Dark Down 16.5 98.8 Really Low 11:16:10 - 11:46:10 -381
Yakima 11:31:09 -41.6 Dark Down 16.5 98.6 Really Low 11:16:09 - 11:46:09 -411
Toppenish/White Swan 11:31:09 -41.6 Dark Down 16.7 98.7 Really Low 11:16:09 - 11:46:09 -428
Pasco 11:31:09 -40.7 Dark Down 17.6 99.6 Really Low 11:16:09 - 11:46:09 -449
Goldendale 11:31:06 -42.0 Dark Down 16.4 98.2 Really Low 11:16:06 - 11:46:06 -465
PNWRO 11:31:09 -40.6 Dark Down 17.7 99.7 Really Low 11:16:09 - 11:46:09 -469
George/Umatilla 11:31:08 -40.9 Dark Down 17.5 99.3 Really Low 11:16:08 - 11:46:08 -472
The Dalles 11:31:05 -42.2 Dark Down 16.2 97.9 Really Low 11:16:05 - 11:46:05 -479
Maupin 11:31:03 -42.2 Dark Down 16.3 97.8 Really Low 11:16:03 - 11:46:03 -512
Madras/Culver 11:31:02 -42.4 Dark Down 16.4 97.6 Really Low 11:16:02 - 11:46:02 -553
Sisters 11:31:00 -42.7 Dark Down 16.1 97.2 Really Low 11:16:00 - 11:46:00 -574
Redmond 11:31:00 -42.4 Dark Down 16.4 97.5 Really Low 11:16:00 - 11:46:00 -580
Bend 11:30:59 -42.6 Dark Down 16.3 97.3 Really Low 11:15:59 - 11:45:59 -595
Oregon Observatory 11:30:59 -42.7 Dark Down 16.2 97.2 Really Low 11:15:59 - 11:45:59 -607
La Pine/Gilchrist 11:30:58 -42.8 Dark Down 16.2 97.0 Really Low 11:15:58 - 11:45:58 -622
North Lake 11:30:57 -42.4 Dark Down 16.7 97.4 Really Low 11:15:57 - 11:45:57 -662
Chiloquin 11:30:54 -43.2 Dark Down 16.1 96.5 Really Low 11:15:54 - 11:45:54 -706
Paisley 11:30:55 -42.2 Dark Down 17.0 97.4 Really Low 11:15:55 - 11:45:55 -709
Klamath Falls 11:30:53 -43.2 Dark Down 16.2 96.4 Really Low 11:15:53 - 11:45:53 -734
Lakeview 11:30:54 -42.1 Dark Down 17.2 97.4 Really Low 11:15:54 - 11:45:54 -751
Tulelake 11:30:52 -43.0 Dark Down 16.4 96.5 Really Low 11:15:52 - 11:45:52 -759
Cedarville 11:30:52 -42.1 Dark Down 17.4 97.3 Really Low 11:15:52 - 11:45:52 -806
Fall River/Burney 11:30:49 -43.0 Dark Down 16.6 96.3 Really Low 11:15:49 - 11:45:49 -833
Susanville 11:30:48 -42.5 Dark Down 17.2 96.6 Really Low 11:15:48 - 11:45:48 -892
Greenville 11:30:47 -42.8 Dark Down 17.0 96.4 Really Low 11:15:47 - 11:45:47 -912
Gimple 11:30:47 -42.7 Dark Down 17.1 96.4 Really Low 11:15:47 - 11:45:47 -913
Quincy 11:30:46 -42.8 Dark Down 17.0 96.3 Really Low 11:15:46 - 11:45:46 -929
Portola 11:30:46 -42.4 Dark Down 17.4 96.6 Really Low 11:15:46 - 11:45:46 -944
Reno 11:30:46 -41.9 Dark Down 17.9 96.9 Really Low 11:15:46 - 11:45:46 -973
Carson City 11:30:45 -42.0 Dark Down 18.0 96.8 Really Low 11:15:45 - 11:45:45 -1003
Gardnerville 11:30:44 -41.9 Dark Down 18.1 96.8 Really Low 11:15:44 - 11:45:44 -1024
Yerington 11:30:45 -41.5 Dark Down 18.5 97.2 Really Low 11:15:45 - 11:45:45 -1026
Hawthorne 11:30:44 -41.1 Dark Down 19.0 97.4 Really Low 11:15:44 - 11:45:44 -1071
Niwot 11:31:11 -30.6 Dark Down 28.9 107.7 Low 11:16:11 - 11:46:11 -1075
Lee Vining 11:30:42 -41.5 Dark Down 18.7 96.8 Really Low 11:15:42 - 11:45:42 -1113
Tonopah 11:30:45 -40.0 Dark Down 20.1 98.1 Low 11:15:45 - 11:45:45 -1125
Bishop 11:30:41 -40.9 Dark Down 19.3 97.1 Really Low 11:15:41 - 11:45:41 -1173
Beatty 11:30:42 -39.6 Dark Down 20.7 98.0 Low 11:15:42 - 11:45:42 -1231
Lone Pine 11:30:39 -40.6 Dark Down 19.6 97.1 Really Low 11:15:39 - 11:45:39 -1243
Indian Springs 11:30:43 -38.7 Dark Down 21.6 98.6 Low 11:15:43 - 11:45:43 -1271
Henderson 11:30:42 -38.1 Dark Down 22.2 98.8 Low 11:15:42 - 11:45:42 -1325
CPSLO 11:30:32 -42.8 Dark Down 17.7 95.0 Really Low 11:15:32 - 11:45:32 -1329
Searchlight/Boulder City 11:30:40 -38.1 Dark Down 22.3 98.6 Low 11:15:40 - 11:45:40 -1377
Patrick 11:30:42 -37.2 Dark Down 23.2 99.3 Low 11:15:42 - 11:45:42 -1393
Laughlin/Bullhead City 11:30:40 -37.8 Dark Down 22.6 98.7 Low 11:15:40 - 11:45:40 -1408
Kingman/Dolan Springs 11:30:41 -37.3 Dark Down 23.1 99.0 Low 11:15:41 - 11:45:41 -1411
DCO 11:30:42 -36.6 Dark Down 23.8 99.6 Low 11:15:42 - 11:45:42 -1428
Mohave Valley 11:30:40 -37.7 Dark Down 22.7 98.6 Low 11:15:40 - 11:45:40 -1432
Wildwood 11:30:31 -41.0 Dark Down 19.5 95.8 Really Low 11:15:31 - 11:45:31 -1459
Lake Havasu City 11:30:39 -37.5 Dark Down 23.0 98.6 Low 11:15:39 - 11:45:39 -1471
Parker 11:30:38 -37.5 Dark Down 23.0 98.4 Low 11:15:38 - 11:45:38 -1503
Idyllwild 11:30:33 -39.4 Dark Down 21.1 96.8 Low 11:15:33 - 11:45:33 -1512
Blythe 11:30:36 -37.7 Dark Down 22.8 98.0 Low 11:15:36 - 11:45:36 -1547
Calipatria 11:30:33 -38.4 Dark Down 22.1 97.3 Low 11:15:33 - 11:45:33 -1582
Yuma 11:30:33 -37.6 Dark Down 22.9 97.6 Low 11:15:33 - 11:45:33 -1632

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 +19:10:22  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 2017/05/20 18:06:20 UT

Marc W. Buie, Southwest Research Institute

RECON