RECON: TNO occultation with 04KV18

Event between 04KV18 and star UC4-367-097218 with event index number of 124035

Geocentric closest approach at 2018/05/10 09:32:51 UTC

J2000 position of star is 17:39:03.5 -16:38:44
Equinox of date position of star is 17:40:03.8 -16:39:15
Stellar brightness R=16.4, use SENSEUP=128
Star is 81 degrees from the moon. Moon is 28% illuminated.
TNO apparent brightness V=23.8

[RECON map]
TNO is 29.5 AU from the Sun and 28.7 AU from the Earth.
The TNO is moving 18.7 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 426 seconds.
The 1-sigma cross-track error in the shadow position is 2751 km.
The sky-plane scale is 20825.6 km/arcsec.

The TNO has an absolute magnitude Hv=9.0
Diameter=95.5 km assuming a 5% albedo -- 5.1 sec chord
Diameter=39.0 km assuming a 30% albedo -- 2.1 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 

Star training set for 04KV18, (2018/05/10 09:33UT)
Object            RA         Dec     mag  sep  mel
Antares        16:30:32.1 -26:28:16  0.9 18.89  96
35Eta Oph      17:11:25.9 -15:44:47  2.6  6.95  88
PPM 233351     17:38:39.5 -15:34:51  6.2  1.13  82
PPM 233369     17:39:26.7 -16:33:15 10.0  0.19  81
04KV18         17:40:07.3 -16:39:17 16.4        81
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 2.1 sigma about the mid-time.
The median site spacing is 13.1 km RECON observability=1.0 and success probability=8.4%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Oroville 09:34:40 -19.8 Dark Down 23.5 167.0 Low 09:19:40 - 09:49:40 2019
Tonasket 09:34:40 -20.0 Dark Down 23.7 167.0 Low 09:19:40 - 09:49:40 2008
Okanogan 09:34:41 -20.3 Dark Down 24.0 166.8 Low 09:19:41 - 09:49:41 1988
Brewster 09:34:41 -20.6 Dark Down 24.3 166.6 Low 09:19:41 - 09:49:41 1971
Manson/Chelan 09:34:43 -20.9 Dark Down 24.4 166.2 Low 09:19:43 - 09:49:43 1953
Entiat 09:34:44 -21.1 Dark Down 24.6 166.1 Low 09:19:44 - 09:49:44 1940
Wenatchee 09:34:44 -21.4 Dark Down 24.8 166.0 Low 09:19:44 - 09:49:44 1925
Ellensburg 09:34:45 -21.8 Dark Down 25.2 165.7 Low 09:19:45 - 09:49:45 1900
Pasco 09:34:40 -22.1 Dark Down 26.2 167.1 Low 09:19:40 - 09:49:40 1888
PNWRO 09:34:39 -22.2 Dark Down 26.4 167.3 Low 09:19:39 - 09:49:39 1879
Yakima 09:34:45 -22.2 Dark Down 25.6 165.6 Low 09:19:45 - 09:49:45 1878
Toppenish/White Swan 09:34:44 -22.3 Dark Down 25.8 165.8 Low 09:19:44 - 09:49:44 1869
George/Umatilla 09:34:41 -22.4 Dark Down 26.5 166.8 Low 09:19:41 - 09:49:41 1865
Goldendale 09:34:46 -23.0 Dark Down 26.3 165.3 Low 09:19:46 - 09:49:46 1831
The Dalles 09:34:48 -23.3 Dark Down 26.5 164.9 Low 09:19:48 - 09:49:48 1811
Niwot 09:33:40 -21.7 Dark Up 33.2 181.9 Up 09:18:40 - 09:48:40 1796
Maupin 09:34:48 -23.6 Dark Down 26.9 164.9 Low 09:19:48 - 09:49:48 1790
Madras/Culver 09:34:48 -24.1 Dark Down 27.4 164.8 Low 09:19:48 - 09:49:48 1759
Redmond 09:34:48 -24.5 Dark Down 27.7 164.7 Low 09:19:48 - 09:49:48 1737
Sisters 09:34:50 -24.6 Dark Down 27.6 164.3 Low 09:19:50 - 09:49:50 1730
Bend 09:34:49 -24.7 Dark Down 27.9 164.5 Low 09:19:49 - 09:49:49 1722
Oregon Observatory 09:34:50 -24.9 Dark Down 28.1 164.4 Low 09:19:50 - 09:49:50 1710
La Pine/Gilchrist 09:34:50 -25.1 Dark Down 28.2 164.3 Low 09:19:50 - 09:49:50 1696
North Lake 09:34:48 -25.3 Dark Down 28.8 164.9 Low 09:19:48 - 09:49:48 1684
Paisley 09:34:46 -25.7 Dark Down 29.4 165.2 Low 09:19:46 - 09:49:46 1659
Lakeview 09:34:46 -26.1 Dark Down 29.9 165.3 Low 09:19:46 - 09:49:46 1632
Chiloquin 09:34:52 -26.2 Dark Down 29.2 163.7 Low 09:19:52 - 09:49:52 1623
Klamath Falls 09:34:52 -26.5 Dark Down 29.6 163.8 Low 09:19:52 - 09:49:52 1604
Cedarville 09:34:45 -26.6 Dark Down 30.6 165.4 Up 09:19:45 - 09:49:45 1596
Tulelake 09:34:51 -26.7 Dark Down 29.9 164.1 Low 09:19:51 - 09:49:51 1594
Fall River/Burney 09:34:51 -27.5 Dark Down 30.8 164.0 Up 09:19:51 - 09:49:51 1539
Susanville 09:34:48 -27.8 Dark Down 31.6 164.7 Up 09:19:48 - 09:49:48 1516
Gimple 09:34:49 -28.1 Dark Down 31.8 164.4 Up 09:19:49 - 09:49:49 1494
Greenville 09:34:49 -28.1 Dark Down 31.8 164.3 Up 09:19:49 - 09:49:49 1492
Portola 09:34:47 -28.3 Dark Down 32.2 164.8 Up 09:19:47 - 09:49:47 1482
Reno 09:34:44 -28.3 Dark Down 32.6 165.5 Up 09:19:44 - 09:49:44 1479
Quincy 09:34:48 -28.3 Dark Down 32.0 164.3 Up 09:19:48 - 09:49:48 1479
Yerington 09:34:41 -28.6 Dark Down 33.2 166.1 Up 09:19:41 - 09:49:41 1458
Carson City 09:34:44 -28.6 Dark Down 32.9 165.4 Up 09:19:44 - 09:49:44 1457
Gardnerville 09:34:44 -28.8 Dark Down 33.2 165.4 Up 09:19:44 - 09:49:44 1442
Tonopah 09:34:33 -28.7 Dark Down 34.5 168.1 Up 09:19:33 - 09:49:33 1440
Hawthorne 09:34:39 -28.8 Dark Down 33.8 166.6 Up 09:19:39 - 09:49:39 1439
Lee Vining 09:34:41 -29.5 Dark Down 34.2 166.0 Up 09:19:41 - 09:49:41 1392
Indian Springs 09:34:26 -29.3 Dark Down 36.2 169.7 Up 09:19:26 - 09:49:26 1373
Beatty 09:34:30 -29.5 Dark Down 35.7 168.5 Up 09:19:30 - 09:49:30 1372
Bishop 09:34:38 -29.7 Dark Down 34.9 166.7 Up 09:19:38 - 09:49:38 1368
Henderson 09:34:23 -29.5 Dark Down 36.8 170.4 Up 09:19:23 - 09:49:23 1352
Patrick 09:34:18 -29.5 Dark Down 37.5 171.6 Up 09:19:18 - 09:49:18 1333
DCO 09:34:14 -29.4 Dark Down 37.9 172.4 Up 09:19:14 - 09:49:14 1327
Lone Pine 09:34:37 -30.3 Dark Down 35.7 166.9 Up 09:19:37 - 09:49:37 1324
Searchlight/Boulder City 09:34:23 -29.9 Dark Down 37.3 170.4 Up 09:19:23 - 09:49:23 1314
Kingman/Dolan Springs 09:34:19 -29.8 Dark Down 37.7 171.4 Up 09:19:19 - 09:49:19 1314
Laughlin/Bullhead City 09:34:21 -30.0 Dark Down 37.7 170.8 Up 09:19:21 - 09:49:21 1300
Mohave Valley 09:34:21 -30.3 Dark Down 38.0 170.7 Up 09:19:21 - 09:49:21 1282
Lake Havasu City 09:34:20 -30.5 Dark Down 38.4 171.0 Up 09:19:20 - 09:49:20 1259
Parker 09:34:19 -30.8 Dark Down 38.7 171.0 Up 09:19:19 - 09:49:19 1235
Blythe 09:34:20 -31.3 Dark Down 39.2 170.6 Up 09:19:20 - 09:49:20 1191
CPSLO 09:34:48 -32.4 Dark Down 36.5 163.7 Up 09:19:48 - 09:49:48 1174
Idyllwild 09:34:30 -32.2 Dark Down 38.8 168.0 Up 09:19:30 - 09:49:30 1154
Wildwood 09:34:39 -32.6 Dark Down 38.1 165.9 Up 09:19:39 - 09:49:39 1136
Calipatria 09:34:25 -32.2 Dark Down 39.6 169.4 Up 09:19:25 - 09:49:25 1135
Yuma 09:34:20 -32.1 Dark Down 40.1 170.4 Up 09:19:20 - 09:49:20 1124

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, (2018/05/10 09:33UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9 18.89  96
35Eta Oph      17:10:22.7 -15:43:29  2.6  6.95  88
PPM 233351     17:37:36.2 -15:34:16  6.2  1.13  82
PPM 233369     17:38:23.0 -16:32:41 10.0  0.19  81
04KV18         17:39:03.5 -16:38:44 16.4        81
Positions are for J2000

Event circumstances last updated at 2017/05/14 18:41:16 UT

Marc W. Buie, Southwest Research Institute

RECON