RECON: TNO occultation with 04KV18

Event between 04KV18 and star UC4-370-099381 with event index number of 201288

Geocentric closest approach at 2019/07/19 06:52:48 UTC

J2000 position of star is 17:41:00.5 -16:05:51
Equinox of date position of star is 17:42:02.5 -16:06:20
Stellar brightness R=16.0, use SENSEUP=128
Star is 58 degrees from the moon. Moon is 95% illuminated.
TNO apparent brightness V=23.8

[RECON map]
TNO is 29.8 AU from the Sun and 28.9 AU from the Earth.
The TNO is moving 19.8 km/sec on the sky relative to the star, or, 3.4 arcsec/hr.
The 1-sigma error in the time of the event is 540 seconds.
The 1-sigma cross-track error in the shadow position is 1632 km.
The sky-plane scale is 20975.9 km/arcsec.

The TNO has an absolute magnitude Hv=9.0
Diameter=95.5 km assuming a 5% albedo -- 4.8 sec chord
Diameter=39.0 km assuming a 30% albedo -- 2.0 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 

Star training set for 04KV18, (2019/07/19 06:53UT)
Object            RA         Dec     mag  sep  mel
Antares        16:30:36.5 -26:28:25  0.9 19.59  73
35Eta Oph      17:11:30.0 -15:44:52  2.6  7.37  66
PPM 233351     17:38:43.6 -15:34:53  6.2  0.97  59
PPM 233491     17:43:47.7 -15:34:02  7.5  0.67  58
PPM 233432     17:41:46.7 -15:54:03  9.8  0.22  58
04KV18         17:42:08.1 -16:06:22 16.0        58
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 1.7 sigma about the mid-time.
The median site spacing is 13.4 km RECON observability=1.0 and success probability=7.3%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Oroville 06:51:52 -18.4 Dark Up 23.6 195.8 Low 06:36:52 - 07:06:52 3614
Tonasket 06:51:52 -18.6 Dark Up 23.8 195.8 Low 06:36:52 - 07:06:52 3603
Okanogan 06:51:52 -18.9 Dark Up 24.2 195.7 Low 06:36:52 - 07:06:52 3587
Brewster 06:51:53 -19.1 Dark Up 24.5 195.6 Low 06:36:53 - 07:06:53 3575
Manson/Chelan 06:51:54 -19.2 Dark Up 24.7 195.2 Low 06:36:54 - 07:06:54 3567
Entiat 06:51:54 -19.4 Dark Up 25.0 195.2 Low 06:36:54 - 07:06:54 3556
Wenatchee 06:51:54 -19.6 Dark Up 25.2 195.1 Low 06:36:54 - 07:06:54 3544
Ellensburg 06:51:55 -20.0 Dark Up 25.7 194.9 Low 06:36:55 - 07:06:55 3524
Yakima 06:51:54 -20.3 Dark Up 26.1 194.9 Low 06:36:54 - 07:06:54 3503
Toppenish/White Swan 06:51:53 -20.6 Dark Up 26.2 195.1 Low 06:36:53 - 07:06:53 3491
Pasco 06:51:48 -21.0 Dark Up 26.1 196.5 Low 06:36:48 - 07:06:48 3477
Goldendale 06:51:54 -21.0 Dark Up 26.9 194.8 Low 06:36:54 - 07:06:54 3465
PNWRO 06:51:47 -21.3 Dark Up 26.3 196.7 Low 06:36:47 - 07:06:47 3463
George/Umatilla 06:51:49 -21.2 Dark Up 26.5 196.3 Low 06:36:49 - 07:06:49 3461
The Dalles 06:51:56 -21.1 Dark Up 27.1 194.4 Low 06:36:56 - 07:06:56 3455
Maupin 06:51:55 -21.6 Dark Up 27.5 194.6 Low 06:36:55 - 07:06:55 3431
Madras/Culver 06:51:55 -22.1 Dark Up 28.1 194.6 Low 06:36:55 - 07:06:55 3402
Sisters 06:51:56 -22.3 Dark Up 28.5 194.2 Low 06:36:56 - 07:06:56 3386
Redmond 06:51:54 -22.4 Dark Up 28.4 194.6 Low 06:36:54 - 07:06:54 3382
Bend 06:51:55 -22.5 Dark Up 28.6 194.5 Low 06:36:55 - 07:06:55 3371
Oregon Observatory 06:51:55 -22.7 Dark Up 28.8 194.4 Low 06:36:55 - 07:06:55 3362
La Pine/Gilchrist 06:51:55 -22.9 Dark Up 29.0 194.3 Low 06:36:55 - 07:06:55 3351
North Lake 06:51:52 -23.4 Dark Up 29.4 195.0 Low 06:36:52 - 07:06:52 3323
Chiloquin 06:51:56 -23.8 Dark Up 30.2 194.1 Up 06:36:56 - 07:06:56 3289
Paisley 06:51:51 -24.0 Dark Up 29.8 195.5 Low 06:36:51 - 07:06:51 3289
Klamath Falls 06:51:55 -24.1 Dark Up 30.5 194.2 Up 06:36:55 - 07:06:55 3268
Lakeview 06:51:49 -24.5 Dark Up 30.3 195.8 Up 06:36:49 - 07:06:49 3258
Tulelake 06:51:54 -24.5 Dark Up 30.7 194.6 Up 06:36:54 - 07:06:54 3251
Cedarville 06:51:48 -25.2 Dark Up 30.9 196.1 Up 06:36:48 - 07:06:48 3218
Fall River/Burney 06:51:52 -25.3 Dark Up 31.6 194.8 Up 06:36:52 - 07:06:52 3196
Susanville 06:51:49 -26.1 Dark Up 32.0 195.7 Up 06:36:49 - 07:06:49 3152
Greenville 06:51:50 -26.3 Dark Up 32.4 195.4 Up 06:36:50 - 07:06:50 3137
Gimple 06:51:50 -26.3 Dark Up 32.4 195.5 Up 06:36:50 - 07:06:50 3137
Quincy 06:51:50 -26.5 Dark Up 32.6 195.5 Up 06:36:50 - 07:06:50 3124
Portola 06:51:47 -26.7 Dark Up 32.6 196.0 Up 06:36:47 - 07:06:47 3114
Reno 06:51:45 -27.2 Dark Up 32.7 196.8 Up 06:36:45 - 07:06:45 3093
Carson City 06:51:44 -27.5 Dark Up 33.0 196.9 Up 06:36:44 - 07:06:44 3070
Gardnerville 06:51:44 -27.7 Dark Up 33.3 197.0 Up 06:36:44 - 07:06:44 3054
Yerington 06:51:41 -27.8 Dark Up 33.1 197.6 Up 06:36:41 - 07:06:41 3053
Hawthorne 06:51:39 -28.4 Dark Up 33.4 198.3 Up 06:36:39 - 07:06:39 3019
Niwot 06:50:48 -28.9 Dark Up 27.6 211.8 Low 06:35:48 - 07:05:48 2992
Lee Vining 06:51:40 -28.8 Dark Up 34.1 197.9 Up 06:36:40 - 07:06:40 2985
Tonopah 06:51:33 -29.2 Dark Up 33.5 199.9 Up 06:36:33 - 07:06:33 2978
Bishop 06:51:37 -29.6 Dark Up 34.4 198.8 Up 06:36:37 - 07:06:37 2941
Beatty 06:51:30 -30.4 Dark Up 34.4 200.7 Up 06:36:30 - 07:06:30 2897
Lone Pine 06:51:35 -30.4 Dark Up 35.1 199.3 Up 06:36:35 - 07:06:35 2887
Indian Springs 06:51:25 -31.0 Dark Up 34.4 201.9 Up 06:36:25 - 07:06:25 2866
Henderson 06:51:22 -31.6 Dark Up 34.7 202.8 Up 06:36:22 - 07:06:22 2823
CPSLO 06:51:45 -30.9 Dark Up 37.0 196.7 Up 06:36:45 - 07:06:45 2816
Searchlight/Boulder City 06:51:21 -32.2 Dark Up 35.2 203.1 Up 06:36:21 - 07:06:21 2782
Patrick 06:51:16 -32.5 Dark Up 34.9 204.2 Up 06:36:16 - 07:06:16 2769
Laughlin/Bullhead City 06:51:18 -32.5 Dark Up 35.4 203.5 Up 06:36:18 - 07:06:18 2758
Kingman/Dolan Springs 06:51:17 -32.6 Dark Up 35.2 204.1 Up 06:36:17 - 07:06:17 2755
DCO 06:51:12 -32.9 Dark Up 35.0 205.1 Up 06:36:12 - 07:06:12 2741
Mohave Valley 06:51:18 -32.8 Dark Up 35.7 203.6 Up 06:36:18 - 07:06:18 2739
Wildwood 06:51:35 -32.6 Dark Up 37.6 199.3 Up 06:36:35 - 07:06:35 2715
Lake Havasu City 06:51:17 -33.2 Dark Up 35.9 204.0 Up 06:36:17 - 07:06:17 2708
Parker 06:51:17 -33.6 Dark Up 36.2 204.1 Up 06:36:17 - 07:06:17 2682
Idyllwild 06:51:27 -33.4 Dark Up 37.4 201.6 Up 06:36:27 - 07:06:27 2674
Blythe 06:51:17 -34.0 Dark Up 36.8 204.0 Up 06:36:17 - 07:06:17 2647
Calipatria 06:51:21 -34.3 Dark Up 37.6 203.1 Up 06:36:21 - 07:06:21 2620
Yuma 06:51:17 -34.9 Dark Up 37.7 204.2 Up 06:36:17 - 07:06:17 2580

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 04KV18, (2019/07/19 06:53UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9 19.59  73
35Eta Oph      17:10:22.7 -15:43:29  2.6  7.37  66
PPM 233351     17:37:36.2 -15:34:16  6.2  0.97  59
PPM 233491     17:42:40.3 -15:33:33  7.5  0.67  58
PPM 233432     17:40:39.2 -15:53:31  9.8  0.22  58
04KV18         17:41:00.5 -16:05:51 16.0        58
Positions are for J2000

Event circumstances last updated at 2017/12/06 19:08:47 UT

Marc W. Buie, Southwest Research Institute

RECON