RECON: TNO occultation with 518151

Event between (518151) 16FH13 and star GA1040:03491619 with event index number of 317077

Geocentric closest approach at 2019/04/23 05:38:47 UTC

J2000 position of star is 11:53:23.4 +14:48:44
Equinox of date position of star is 11:54:22.6 +14:42:20
Stellar brightness G=14.5, use SENSEUP=32
Star is 88 degrees from the moon. Moon is 83% illuminated.
TNO apparent brightness V=21.1

[RECON map]
TNO is 12.1 AU from the Sun and 11.4 AU from the Earth.
The TNO is moving 24.1 km/sec on the sky relative to the star, or, 10.5 arcsec/hr.
The 1-sigma error in the time of the event is 34 seconds.
The 1-sigma cross-track error in the shadow position is 907 km.
The sky-plane scale is 8254.2 km/arcsec.

The TNO has an absolute magnitude Hv=10.1
Diameter=57.5 km assuming a 5% albedo -- 2.4 sec chord
Diameter=23.5 km assuming a 30% albedo -- 1.0 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 

Star training set for 518151, (2019/04/23 05:39UT)
Object            RA         Dec     mag  sep  mel
Regulus        10:09:23.9 +11:52:20  1.3 25.68 111
Denebola       11:50:02.6 +14:27:51  2.1  1.08  89
95 Leo         11:56:40.0 +15:32:22  5.5  1.00  88
PPM 128647     11:55:32.9 +14:02:37  7.8  0.72  87
PPM 128617     11:53:24.3 +14:21:03  9.4  0.43  88
PPM 128611     11:52:44.7 +14:43:47 10.2  0.40  88
518151         11:54:22.9 +14:42:18 14.5        88
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 12.6 km RECON observability=1.0 and success probability=34.5%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Kelowna 05:40:22 -20.9 Dark Down 54.9 177.2 Up 05:37:01 - 05:43:44 136
Summerland 05:40:23 -21.1 Dark Down 55.2 176.7 Up 05:37:01 - 05:43:44 102
Penticton 05:40:22 -21.2 Dark Down 55.2 176.9 Up 05:37:01 - 05:43:44 102
Niwot 05:39:21 -34.3 Dark Up 62.5 206.5 Up 05:36:00 - 05:42:43 101
SwRI 05:39:21 -34.4 Dark Up 62.6 206.4 Up 05:36:00 - 05:42:43 88
Okanagan Falls 05:40:22 -21.3 Dark Down 55.4 176.8 Up 05:37:00 - 05:43:43 87
Oliver 05:40:21 -21.5 Dark Down 55.6 176.9 Up 05:37:00 - 05:43:43 75
Anarchist Mountain Observatory 05:40:21 -21.7 Dark Down 55.8 177.2 Up 05:36:59 - 05:43:42 71
Oroville 05:40:21 -21.7 Dark Down 55.8 177.0 Up 05:36:59 - 05:43:42 62
Tonasket 05:40:20 -21.9 Dark Down 56.1 177.0 Up 05:36:59 - 05:43:42 44
Okanogan 05:40:20 -22.1 Dark Down 56.4 176.7 Up 05:36:58 - 05:43:41 12
Brewster 05:40:20 -22.2 Dark Down 56.7 176.4 Up 05:36:58 - 05:43:41 -17
Manson/Chelan 05:40:20 -22.3 Dark Down 56.9 175.7 Up 05:36:59 - 05:43:42 -50
Entiat 05:40:20 -22.4 Dark Down 57.1 175.5 Up 05:36:58 - 05:43:41 -70
Wenatchee 05:40:20 -22.6 Dark Down 57.3 175.3 Up 05:36:58 - 05:43:41 -94
Pasco 05:40:14 -24.0 Dark Down 58.5 177.4 Up 05:36:52 - 05:43:35 -130
Ellensburg 05:40:19 -22.8 Dark Down 57.7 174.9 Up 05:36:58 - 05:43:41 -136
PNWRO 05:40:13 -24.3 Dark Down 58.8 177.8 Up 05:36:51 - 05:43:34 -139
George/Umatilla 05:40:14 -24.2 Dark Down 58.9 176.9 Up 05:36:52 - 05:43:35 -166
Yakima 05:40:18 -23.1 Dark Down 58.1 174.8 Up 05:36:57 - 05:43:40 -168
Toppenish/White Swan 05:40:17 -23.4 Dark Down 58.4 175.1 Up 05:36:56 - 05:43:39 -178
Goldendale 05:40:17 -23.6 Dark Down 58.9 174.2 Up 05:36:56 - 05:43:39 -241
The Dalles 05:40:18 -23.6 Dark Down 59.1 173.5 Up 05:36:56 - 05:43:39 -275
Maupin 05:40:17 -24.0 Dark Down 59.5 173.6 Up 05:36:55 - 05:43:38 -304
Madras/Culver 05:40:16 -24.4 Dark Down 60.0 173.4 Up 05:36:54 - 05:43:37 -350
Redmond 05:40:15 -24.7 Dark Down 60.4 173.2 Up 05:36:53 - 05:43:36 -381
Sisters 05:40:16 -24.5 Dark Down 60.3 172.4 Up 05:36:55 - 05:43:38 -397
Bend 05:40:15 -24.8 Dark Down 60.6 172.9 Up 05:36:53 - 05:43:36 -405
Oregon Observatory 05:40:15 -24.8 Dark Down 60.8 172.6 Up 05:36:53 - 05:43:36 -425
La Pine/Gilchrist 05:40:15 -25.0 Dark Down 61.0 172.4 Up 05:36:53 - 05:43:36 -444
North Lake 05:40:12 -25.6 Dark Down 61.4 173.5 Up 05:36:50 - 05:43:33 -451
Paisley 05:40:10 -26.2 Dark Down 62.0 174.1 Up 05:36:48 - 05:43:31 -479
Lakeview 05:40:08 -26.7 Dark Down 62.5 174.4 Up 05:36:46 - 05:43:29 -511
Chiloquin 05:40:13 -25.7 Dark Down 62.0 171.4 Up 05:36:51 - 05:43:34 -552
Cedarville 05:40:06 -27.2 Dark Down 63.2 174.6 Up 05:36:44 - 05:43:27 -557
Klamath Falls 05:40:12 -26.0 Dark Down 62.4 171.4 Up 05:36:51 - 05:43:34 -577
Tulelake 05:40:11 -26.3 Dark Down 62.7 172.0 Up 05:36:49 - 05:43:32 -584
Fall River/Burney 05:40:08 -27.0 Dark Down 63.6 171.9 Up 05:36:47 - 05:43:30 -656
Susanville 05:40:06 -27.9 Dark Down 64.3 173.3 Up 05:36:44 - 05:43:27 -672
Tonopah 05:39:49 -31.3 Dark Down 66.8 180.9 Up 05:36:28 - 05:43:11 -692
Gimple 05:40:06 -28.0 Dark Down 64.5 172.8 Up 05:36:44 - 05:43:27 -706
Greenville 05:40:06 -27.9 Dark Down 64.5 172.6 Up 05:36:44 - 05:43:27 -710
DCO 05:39:30 -35.6 Dark Down 69.3 192.0 Up 05:36:08 - 05:42:51 -715
Yerington 05:39:57 -29.7 Dark Down 65.8 176.4 Up 05:36:36 - 05:43:19 -715
Reno 05:40:06 -29.0 Dark Down 65.2 175.0 Up 05:36:44 - 05:43:27 -715
Portola 05:40:06 -28.4 Dark Down 64.9 173.6 Up 05:36:44 - 05:43:27 -717
Hawthorne 05:39:55 -30.3 Dark Down 66.3 177.6 Up 05:36:33 - 05:43:16 -727
Quincy 05:40:06 -28.1 Dark Down 64.7 172.6 Up 05:36:44 - 05:43:27 -727
Patrick 05:39:33 -35.0 Dark Down 69.1 190.0 Up 05:36:11 - 05:42:54 -729
Indian Springs 05:39:41 -33.3 Dark Down 68.2 184.9 Up 05:36:19 - 05:43:02 -733
Henderson 05:39:38 -34.0 Dark Down 68.6 186.8 Up 05:36:16 - 05:42:59 -739
Carson City 05:40:06 -29.2 Dark Down 65.6 175.0 Up 05:36:44 - 05:43:27 -748
Kingman/Dolan Springs 05:39:33 -35.1 Dark Down 69.4 189.6 Up 05:36:11 - 05:42:54 -758
Beatty 05:39:45 -32.5 Dark Down 67.9 182.1 Up 05:36:24 - 05:43:07 -763
Gardnerville 05:40:06 -29.5 Dark Down 65.8 175.1 Up 05:36:44 - 05:43:27 -769
Searchlight/Boulder City 05:39:36 -34.5 Dark Down 69.2 187.1 Up 05:36:14 - 05:42:57 -783
Laughlin/Bullhead City 05:39:34 -34.9 Dark Down 69.5 188.2 Up 05:36:13 - 05:42:56 -788
Lee Vining 05:39:55 -30.5 Dark Down 66.8 176.3 Up 05:36:33 - 05:43:16 -799
Mohave Valley 05:39:33 -35.1 Dark Down 69.7 188.3 Up 05:36:12 - 05:42:55 -810
Bishop 05:39:51 -31.3 Dark Down 67.4 178.0 Up 05:36:30 - 05:43:13 -811
Lake Havasu City 05:39:32 -35.6 Dark Down 70.1 189.1 Up 05:36:10 - 05:42:53 -829
Parker 05:39:31 -35.9 Dark Down 70.5 189.4 Up 05:36:09 - 05:42:52 -857
Lone Pine 05:39:48 -32.1 Dark Down 68.2 178.8 Up 05:36:27 - 05:43:10 -857
Blythe 05:39:30 -36.1 Dark Down 71.0 188.7 Up 05:36:09 - 05:42:52 -917
Yuma 05:39:28 -36.9 Dark Down 71.9 189.0 Up 05:36:06 - 05:42:49 -996
Calipatria 05:39:32 -36.1 Dark Down 71.6 186.1 Up 05:36:11 - 05:42:54 -1010
Idyllwild 05:39:37 -35.0 Dark Down 71.1 182.5 Up 05:36:15 - 05:42:58 -1025
Wildwood 05:39:44 -33.7 Dark Down 70.7 177.0 Up 05:36:22 - 05:43:05 -1097
CPSLO 05:39:53 -31.7 Dark Down 69.3 171.6 Up 05:36:31 - 05:43:14 -1104

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 518151, (2019/04/23 05:39UT)
Object            RA         Dec     mag  sep  mel
Regulus        10:08:22.0 +11:58:02  1.3 25.68 111
Denebola       11:49:02.9 +14:34:17  2.1  1.08  89
95 Leo         11:55:40.5 +15:38:48  5.5  1.00  88
PPM 128647     11:54:33.4 +14:09:04  7.8  0.72  87
PPM 128617     11:52:24.7 +14:27:30  9.4  0.43  88
PPM 128611     11:51:45.1 +14:50:13 10.2  0.40  88
518151         11:53:23.4 +14:48:44 14.5        88
Positions are for J2000

Event circumstances last updated at 2019/03/18 04:35:56 UT

Marc W. Buie, Southwest Research Institute

RECON