RECON: TNO occultation with 04KV18

Event between 04KV18 and star UC4-369-105458 with event index number of 189909

Geocentric closest approach at 2019/05/16 10:15:19 UTC

J2000 position of star is 17:47:52.8 -16:13:34
Equinox of date position of star is 17:48:53.1 -16:13:51
Stellar brightness R=15.4, use SENSEUP=128
Star is 63 degrees from the moon. Moon is 92% 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 19.7 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 610 seconds.
The 1-sigma cross-track error in the shadow position is 1545 km.
The sky-plane scale is 20960.6 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, (2019/05/16 10:15UT)
Object            RA         Dec     mag  sep  mel
Antares        16:30:35.9 -26:28:24  0.9 20.89  47
35Eta Oph      17:11:29.4 -15:44:51  2.6  9.03  54
PPM 233599     17:48:43.1 -14:43:53  5.9  1.50  63
PPM 233581     17:47:43.4 -16:00:35  8.4  0.38  63
PPM 233608     17:49:13.1 -16:00:44  9.7  0.23  63
04KV18         17:48:59.9 -16:13:53 15.4        64
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 1.5 sigma about the mid-time.
The median site spacing is 12.3 km RECON observability=1.0 and success probability=0.0%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Oroville 10:16:03 -15.0 AT Up 24.8 181.5 Low 10:01:03 - 10:31:03 11535
Tonasket 10:16:03 -15.2 AT Up 25.1 181.5 Low 10:01:03 - 10:31:03 11524
Okanogan 10:16:03 -15.5 AT Up 25.4 181.4 Low 10:01:03 - 10:31:03 11507
Brewster 10:16:04 -15.8 AT Up 25.7 181.2 Low 10:01:04 - 10:31:04 11492
Manson/Chelan 10:16:05 -16.1 AT Up 25.9 180.8 Low 10:01:05 - 10:31:05 11477
Entiat 10:16:04 -16.4 AT Up 26.1 180.7 Low 10:01:04 - 10:31:04 11466
Wenatchee 10:16:04 -16.6 AT Up 26.4 180.6 Low 10:01:04 - 10:31:04 11452
Ellensburg 10:16:06 -17.0 AT Up 26.8 180.4 Low 10:01:06 - 10:31:06 11429
Pasco 10:16:00 -17.1 AT Up 27.5 181.9 Low 10:01:00 - 10:31:00 11410
Yakima 10:16:05 -17.4 AT Up 27.2 180.4 Low 10:01:05 - 10:31:05 11409
PNWRO 10:15:59 -17.2 AT Up 27.7 182.1 Low 10:00:59 - 10:30:59 11401
Toppenish/White Swan 10:16:05 -17.5 AT Up 27.4 180.5 Low 10:01:05 - 10:31:05 11400
George/Umatilla 10:16:02 -17.5 AT Up 27.8 181.7 Low 10:01:02 - 10:31:02 11390
Goldendale 10:16:07 -18.1 Dark Up 28.0 180.1 Low 10:01:07 - 10:31:07 11367
The Dalles 10:16:08 -18.4 Dark Up 28.2 179.7 Low 10:01:08 - 10:31:08 11350
Maupin 10:16:07 -18.7 Dark Up 28.6 179.8 Low 10:01:07 - 10:31:07 11330
Madras/Culver 10:16:07 -19.2 Dark Up 29.1 179.8 Low 10:01:07 - 10:31:07 11300
Redmond 10:16:07 -19.5 Dark Up 29.5 179.7 Low 10:01:07 - 10:31:07 11281
Sisters 10:16:08 -19.7 Dark Up 29.5 179.3 Low 10:01:08 - 10:31:08 11276
Bend 10:16:07 -19.8 Dark Up 29.7 179.5 Low 10:01:07 - 10:31:07 11267
Oregon Observatory 10:16:08 -20.0 Dark Up 29.9 179.4 Low 10:01:08 - 10:31:08 11256
La Pine/Gilchrist 10:16:08 -20.2 Dark Up 30.1 179.3 Up 10:01:08 - 10:31:08 11244
North Lake 10:16:05 -20.3 Dark Up 30.5 180.0 Up 10:01:05 - 10:31:05 11228
Niwot 10:14:59 -15.0 AT Up 31.9 197.5 Up 09:59:59 - 10:29:59 11226
Paisley 10:16:04 -20.6 Dark Up 31.1 180.4 Up 10:01:04 - 10:31:04 11203
Chiloquin 10:16:08 -21.2 Dark Up 31.2 178.9 Up 10:01:08 - 10:31:08 11177
Lakeview 10:16:03 -20.9 Dark Up 31.6 180.6 Up 10:01:03 - 10:31:03 11177
Klamath Falls 10:16:09 -21.5 Dark Up 31.5 179.0 Up 10:01:09 - 10:31:09 11158
Tulelake 10:16:07 -21.6 Dark Up 31.8 179.4 Up 10:01:07 - 10:31:07 11147
Cedarville 10:16:02 -21.4 Dark Up 32.2 180.8 Up 10:01:02 - 10:31:02 11141
Fall River/Burney 10:16:06 -22.3 Dark Up 32.7 179.4 Up 10:01:06 - 10:31:06 11095
Susanville 10:16:03 -22.5 Dark Up 33.4 180.3 Up 10:01:03 - 10:31:03 11068
Gimple 10:16:04 -22.8 Dark Up 33.6 180.0 Up 10:01:04 - 10:31:04 11048
Greenville 10:16:03 -22.9 Dark Up 33.6 179.9 Up 10:01:03 - 10:31:03 11047
Quincy 10:16:04 -23.0 Dark Up 33.8 179.9 Up 10:01:04 - 10:31:04 11035
Portola 10:16:02 -22.9 Dark Up 34.0 180.5 Up 10:01:02 - 10:31:02 11034
Reno 10:15:59 -22.8 Dark Up 34.2 181.2 Up 10:00:59 - 10:30:59 11028
Carson City 10:15:58 -23.1 Dark Up 34.6 181.2 Up 10:00:58 - 10:30:58 11006
Yerington 10:15:56 -23.0 Dark Up 34.8 182.0 Up 10:00:56 - 10:30:56 11003
Gardnerville 10:15:59 -23.3 Dark Up 34.8 181.3 Up 10:00:59 - 10:30:59 10991
Hawthorne 10:15:53 -23.1 Dark Up 35.2 182.6 Up 10:00:53 - 10:30:53 10981
Tonopah 10:15:47 -22.8 Dark Up 35.6 184.3 Up 10:00:47 - 10:30:47 10972
Lee Vining 10:15:55 -23.8 Dark Up 35.8 182.0 Up 10:00:55 - 10:30:55 10939
Bishop 10:15:51 -23.9 Dark Up 36.4 182.9 Up 10:00:51 - 10:30:51 10911
Beatty 10:15:45 -23.5 Dark Up 36.7 184.9 Up 10:00:45 - 10:30:45 10903
Indian Springs 10:15:39 -23.2 Dark Up 37.0 186.1 Up 10:00:39 - 10:30:39 10896
Henderson 10:15:36 -23.2 Dark Up 37.4 187.0 Up 10:00:36 - 10:30:36 10870
Lone Pine 10:15:50 -24.4 Dark Up 37.1 183.3 Up 10:00:50 - 10:30:50 10866
Patrick 10:15:30 -23.1 Dark Up 38.0 188.4 Up 10:00:30 - 10:30:30 10843
Searchlight/Boulder City 10:15:34 -23.6 Dark Up 38.0 187.1 Up 10:00:34 - 10:30:34 10833
DCO 10:15:27 -23.0 Dark Up 38.2 189.3 Up 10:00:27 - 10:30:27 10832
Kingman/Dolan Springs 10:15:30 -23.4 Dark Up 38.2 188.2 Up 10:00:30 - 10:30:30 10826
Laughlin/Bullhead City 10:15:33 -23.7 Dark Up 38.3 187.6 Up 10:00:33 - 10:30:33 10817
Mohave Valley 10:15:33 -23.9 Dark Up 38.5 187.6 Up 10:00:33 - 10:30:33 10799
Lake Havasu City 10:15:31 -24.0 Dark Up 38.9 188.0 Up 10:00:31 - 10:30:31 10775
Parker 10:15:31 -24.3 Dark Up 39.3 188.0 Up 10:00:31 - 10:30:31 10751
CPSLO 10:16:00 -26.7 Dark Up 38.5 180.3 Up 10:01:00 - 10:31:00 10740
Blythe 10:15:31 -24.8 Dark Up 39.8 187.7 Up 10:00:31 - 10:30:31 10711
Idyllwild 10:15:41 -25.9 Dark Up 39.9 185.1 Up 10:00:41 - 10:30:41 10691
Wildwood 10:15:50 -26.6 Dark Up 39.6 182.8 Up 10:00:50 - 10:30:50 10688
Calipatria 10:15:36 -25.7 Dark Up 40.4 186.6 Up 10:00:36 - 10:30:36 10664
Yuma 10:15:30 -25.6 Dark Up 40.7 187.8 Up 10:00:30 - 10:30:30 10646

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, (2019/05/16 10:15UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9 20.89  47
35Eta Oph      17:10:22.7 -15:43:29  2.6  9.03  54
PPM 233599     17:47:36.8 -14:43:33  5.9  1.50  63
PPM 233581     17:46:36.4 -16:00:13  8.4  0.38  63
PPM 233608     17:48:06.1 -16:00:25  9.7  0.23  63
04KV18         17:47:52.8 -16:13:34 15.4        63
Positions are for J2000

Event circumstances last updated at 2017/06/01 18:12:52 UT

Marc W. Buie, Southwest Research Institute

RECON