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 06:52:52 UTC

J2000 position of star is 17:41:00.5 -16:05:51
Equinox of date position of star is 17:42:01.3 -16:06:19
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 1633 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 13.6 km RECON observability=1.0 and success probability=7.4%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Oroville 06:51:55 -18.4 Dark Up 23.6 195.8 Low 06:36:55 - 07:06:55 3601
Tonasket 06:51:55 -18.6 Dark Up 23.8 195.9 Low 06:36:55 - 07:06:55 3590
Okanogan 06:51:55 -18.9 Dark Up 24.2 195.7 Low 06:36:55 - 07:06:55 3574
Brewster 06:51:55 -19.1 Dark Up 24.5 195.6 Low 06:36:55 - 07:06:55 3562
Manson/Chelan 06:51:55 -19.2 Dark Up 24.7 195.2 Low 06:36:55 - 07:06:55 3554
Entiat 06:51:55 -19.4 Dark Up 25.0 195.2 Low 06:36:55 - 07:06:55 3543
Wenatchee 06:51:56 -19.6 Dark Up 25.2 195.1 Low 06:36:56 - 07:06:56 3531
Ellensburg 06:51:56 -20.0 Dark Up 25.7 194.9 Low 06:36:56 - 07:06:56 3511
Yakima 06:51:56 -20.3 Dark Up 26.1 194.9 Low 06:36:56 - 07:06:56 3491
Toppenish/White Swan 06:51:55 -20.6 Dark Up 26.2 195.1 Low 06:36:55 - 07:06:55 3478
Pasco 06:51:51 -21.0 Dark Up 26.1 196.5 Low 06:36:51 - 07:06:51 3464
Goldendale 06:51:56 -21.0 Dark Up 26.9 194.8 Low 06:36:56 - 07:06:56 3452
PNWRO 06:51:50 -21.3 Dark Up 26.3 196.8 Low 06:36:50 - 07:06:50 3450
George/Umatilla 06:51:51 -21.2 Dark Up 26.5 196.3 Low 06:36:51 - 07:06:51 3448
The Dalles 06:51:57 -21.1 Dark Up 27.1 194.4 Low 06:36:57 - 07:06:57 3442
Maupin 06:51:56 -21.6 Dark Up 27.5 194.6 Low 06:36:56 - 07:06:56 3419
Madras/Culver 06:51:56 -22.1 Dark Up 28.1 194.6 Low 06:36:56 - 07:06:56 3389
Sisters 06:51:58 -22.3 Dark Up 28.5 194.2 Low 06:36:58 - 07:06:58 3374
Redmond 06:51:56 -22.4 Dark Up 28.4 194.6 Low 06:36:56 - 07:06:56 3370
Bend 06:51:56 -22.6 Dark Up 28.6 194.5 Low 06:36:56 - 07:06:56 3359
Oregon Observatory 06:51:57 -22.7 Dark Up 28.8 194.4 Low 06:36:57 - 07:06:57 3350
La Pine/Gilchrist 06:51:57 -22.9 Dark Up 29.0 194.3 Low 06:36:57 - 07:06:57 3339
North Lake 06:51:55 -23.4 Dark Up 29.4 195.0 Low 06:36:55 - 07:06:55 3311
Chiloquin 06:51:57 -23.8 Dark Up 30.2 194.1 Up 06:36:57 - 07:06:57 3277
Paisley 06:51:53 -24.0 Dark Up 29.8 195.5 Low 06:36:53 - 07:06:53 3277
Klamath Falls 06:51:57 -24.1 Dark Up 30.5 194.2 Up 06:36:57 - 07:06:57 3256
Lakeview 06:51:51 -24.5 Dark Up 30.3 195.8 Up 06:36:51 - 07:06:51 3246
Tulelake 06:51:56 -24.5 Dark Up 30.7 194.6 Up 06:36:56 - 07:06:56 3239
Cedarville 06:51:51 -25.2 Dark Up 30.9 196.1 Up 06:36:51 - 07:06:51 3205
Fall River/Burney 06:51:55 -25.4 Dark Up 31.6 194.8 Up 06:36:55 - 07:06:55 3183
Susanville 06:51:51 -26.1 Dark Up 32.0 195.7 Up 06:36:51 - 07:06:51 3140
Greenville 06:51:53 -26.3 Dark Up 32.4 195.5 Up 06:36:53 - 07:06:53 3125
Gimple 06:51:52 -26.3 Dark Up 32.3 195.6 Up 06:36:52 - 07:06:52 3124
Quincy 06:51:52 -26.5 Dark Up 32.6 195.5 Up 06:36:52 - 07:06:52 3112
Portola 06:51:50 -26.7 Dark Up 32.6 196.0 Up 06:36:50 - 07:06:50 3101
Reno 06:51:47 -27.2 Dark Up 32.7 196.8 Up 06:36:47 - 07:06:47 3080
Carson City 06:51:47 -27.5 Dark Up 33.0 196.9 Up 06:36:47 - 07:06:47 3057
Gardnerville 06:51:47 -27.8 Dark Up 33.3 197.0 Up 06:36:47 - 07:06:47 3041
Yerington 06:51:44 -27.9 Dark Up 33.1 197.6 Up 06:36:44 - 07:06:44 3040
Hawthorne 06:51:41 -28.4 Dark Up 33.4 198.3 Up 06:36:41 - 07:06:41 3006
Niwot 06:50:51 -28.9 Dark Up 27.6 211.8 Low 06:35:51 - 07:05:51 2979
Lee Vining 06:51:43 -28.8 Dark Up 34.1 197.9 Up 06:36:43 - 07:06:43 2973
Tonopah 06:51:35 -29.2 Dark Up 33.5 199.9 Up 06:36:35 - 07:06:35 2965
Bishop 06:51:40 -29.6 Dark Up 34.4 198.8 Up 06:36:40 - 07:06:40 2928
Beatty 06:51:32 -30.4 Dark Up 34.4 200.7 Up 06:36:32 - 07:06:32 2884
Lone Pine 06:51:37 -30.4 Dark Up 35.1 199.3 Up 06:36:37 - 07:06:37 2874
Indian Springs 06:51:27 -31.0 Dark Up 34.4 202.0 Up 06:36:27 - 07:06:27 2852
Henderson 06:51:24 -31.6 Dark Up 34.7 202.9 Up 06:36:24 - 07:06:24 2809
CPSLO 06:51:48 -30.9 Dark Up 37.0 196.7 Up 06:36:48 - 07:06:48 2802
Searchlight/Boulder City 06:51:22 -32.2 Dark Up 35.2 203.1 Up 06:36:22 - 07:06:22 2769
Patrick 06:51:18 -32.5 Dark Up 34.9 204.2 Up 06:36:18 - 07:06:18 2755
Laughlin/Bullhead City 06:51:21 -32.5 Dark Up 35.4 203.5 Up 06:36:21 - 07:06:21 2744
Kingman/Dolan Springs 06:51:19 -32.6 Dark Up 35.2 204.1 Up 06:36:19 - 07:06:19 2741
DCO 06:51:15 -32.9 Dark Up 35.0 205.1 Up 06:36:15 - 07:06:15 2727
Mohave Valley 06:51:21 -32.8 Dark Up 35.6 203.6 Up 06:36:21 - 07:06:21 2725
Wildwood 06:51:37 -32.6 Dark Up 37.6 199.3 Up 06:36:37 - 07:06:37 2702
Lake Havasu City 06:51:19 -33.3 Dark Up 35.9 204.0 Up 06:36:19 - 07:06:19 2694
Parker 06:51:18 -33.6 Dark Up 36.2 204.1 Up 06:36:18 - 07:06:18 2668
Idyllwild 06:51:29 -33.4 Dark Up 37.4 201.6 Up 06:36:29 - 07:06:29 2662
Blythe 06:51:19 -34.0 Dark Up 36.8 204.0 Up 06:36:19 - 07:06:19 2633
Calipatria 06:51:23 -34.3 Dark Up 37.6 203.1 Up 06:36:23 - 07:06:23 2605
Yuma 06:51:18 -34.9 Dark Up 37.7 204.2 Up 06:36:18 - 07:06:18 2565

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 2017/08/04 18:11:57 UT

Marc W. Buie, Southwest Research Institute

RECON