RECON: TNO occultation with 04KV18

Event between 04KV18 and star GA0740:15133255 with event index number of 1077684

Geocentric closest approach at 2021/06/18 04:46:01 UTC

J2000 position of star is 18:02:37.4 -15:17:43
Equinox of date position of star is 18:03:50.6 -15:17:37
Stellar brightness G=15.9, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 92 degrees from the moon. Moon is 51% illuminated.
TNO apparent brightness V=23.8

[RECON map]
TNO is 30.2 AU from the Sun and 29.2 AU from the Earth.
The TNO is moving 24.0 km/sec on the sky relative to the star, or, 4.1 arcsec/hr.
The 1-sigma error in the time of the event is 391 seconds.
The 1-sigma cross-track error in the shadow position is 2743 km.
The sky-plane scale is 21174.8 km/arcsec.

The TNO has an absolute magnitude Hv=9.0
Diameter=95.5 km assuming a 5% albedo -- 4.0 sec chord
Diameter=39.0 km assuming a 30% albedo -- 1.6 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 

Star training set for 04KV18, (2021/06/18 04:46UT)
Object            RA         Dec     mag  sep  mel
Antares        16:30:43.6 -26:28:40  0.9 24.40  73
35Eta Oph      17:11:36.6 -15:45:00  2.6 12.59  80
PPM 233766     17:57:33.2 -15:48:52  6.1  1.60  91
PPM 233912     18:02:30.5 -15:21:34  8.3  0.33  92
PPM 233931     18:03:12.4 -15:20:04  9.9  0.16  92
04KV18         18:03:51.2 -15:17:37 15.9        93
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 2.3 sigma about the mid-time.
The median site spacing is 21.1 km RECON observability=0.3 and success probability=7.2%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Clarence Fulton 04:48:25 -5.2 CT Up 10.6 130.1 Really Low 04:33:25 - 05:03:25 -628
Kelowna 04:48:26 -5.4 CT Up 10.8 129.9 Really Low 04:33:26 - 05:03:26 -653
Peachland 04:48:27 -5.4 CT Up 10.7 129.7 Really Low 04:33:27 - 05:03:27 -665
Summerland 04:48:27 -5.6 CT Up 10.8 129.7 Really Low 04:33:27 - 05:03:27 -672
Penticton 04:48:27 -5.6 CT Up 10.9 129.8 Really Low 04:33:27 - 05:03:27 -674
Oliver 04:48:28 -5.9 CT Up 11.1 129.8 Really Low 04:33:28 - 05:03:28 -695
Anarchist Mountain Observatory 04:48:28 -6.1 NT Up 11.4 129.9 Really Low 04:33:28 - 05:03:28 -701
Tonasket 04:48:29 -6.3 NT Up 11.5 129.8 Really Low 04:33:29 - 05:03:29 -721
Okanogan 04:48:30 -6.5 NT Up 11.7 129.6 Really Low 04:33:30 - 05:03:30 -744
Brewster 04:48:31 -6.6 NT Up 11.7 129.4 Really Low 04:33:31 - 05:03:31 -764
Manson/Chelan 04:48:32 -6.6 NT Up 11.7 129.1 Really Low 04:33:32 - 05:03:32 -783
Victoria 04:48:36 -4.6 CT Up 9.6 126.5 Really Low 04:33:36 - 05:03:36 -803
Wenatchee 04:48:34 -6.9 NT Up 11.9 128.9 Really Low 04:33:34 - 05:03:34 -816
Ellensburg 04:48:35 -7.1 NT Up 12.0 128.6 Really Low 04:33:35 - 05:03:35 -846
Pasco 04:48:34 -8.3 NT Up 13.3 129.7 Really Low 04:33:34 - 05:03:34 -867
Yakima 04:48:36 -7.3 NT Up 12.3 128.5 Really Low 04:33:36 - 05:03:36 -872
PNWRO 04:48:35 -8.6 NT Up 13.5 129.8 Really Low 04:33:35 - 05:03:35 -879
Toppenish/White Swan 04:48:37 -7.6 NT Up 12.5 128.6 Really Low 04:33:37 - 05:03:37 -883
Goldendale 04:48:39 -7.8 NT Up 12.6 128.2 Really Low 04:33:39 - 05:03:39 -926
The Dalles 04:48:40 -7.8 NT Up 12.6 127.9 Really Low 04:33:40 - 05:03:40 -947
Maupin 04:48:41 -8.1 NT Up 12.9 127.9 Really Low 04:33:41 - 05:03:41 -973
Dunrhomin 04:48:14 -19.2 Dark Up 24.6 140.2 Low 04:33:14 - 05:03:14 -1018
Redmond 04:48:44 -8.7 NT Up 13.4 127.6 Really Low 04:33:44 - 05:03:44 -1034
Sisters 04:48:44 -8.5 NT Up 13.1 127.3 Really Low 04:33:44 - 05:03:44 -1040
Bend 04:48:44 -8.8 NT Up 13.4 127.5 Really Low 04:33:44 - 05:03:44 -1051
Oregon Observatory 04:48:45 -8.8 NT Up 13.5 127.4 Really Low 04:33:45 - 05:03:45 -1065
La Pine/Gilchrist 04:48:45 -9.0 NT Up 13.6 127.3 Really Low 04:33:45 - 05:03:45 -1081
North Lake 04:48:46 -9.6 NT Up 14.2 127.7 Really Low 04:33:46 - 05:03:46 -1099
Paisley 04:48:46 -10.2 NT Up 14.7 127.8 Really Low 04:33:46 - 05:03:46 -1130
Lakeview 04:48:47 -10.6 NT Up 15.2 127.9 Really Low 04:33:47 - 05:03:47 -1161
Chiloquin 04:48:49 -9.6 NT Up 14.0 126.8 Really Low 04:33:49 - 05:03:49 -1164
Klamath Falls 04:48:50 -9.9 NT Up 14.3 126.8 Really Low 04:33:50 - 05:03:50 -1187
Cedarville 04:48:48 -11.2 NT Up 15.7 127.9 Really Low 04:33:48 - 05:03:48 -1204
Fall River/Burney 04:48:52 -10.9 NT Up 15.2 126.8 Really Low 04:33:52 - 05:03:52 -1263
Susanville 04:48:51 -11.7 NT Up 16.1 127.3 Really Low 04:33:51 - 05:03:51 -1294
Gimple 04:48:52 -11.8 NT Up 16.1 127.1 Really Low 04:33:52 - 05:03:52 -1318
Greenville 04:48:53 -11.8 NT Up 16.0 127.0 Really Low 04:33:53 - 05:03:53 -1320
Portola 04:48:52 -12.3 AT Up 16.5 127.3 Really Low 04:33:52 - 05:03:52 -1334
Quincy 04:48:53 -11.9 NT Up 16.2 126.9 Really Low 04:33:53 - 05:03:53 -1334
Reno 04:48:52 -12.8 AT Up 17.1 127.7 Really Low 04:33:52 - 05:03:52 -1340
Carson City 04:48:52 -13.1 AT Up 17.3 127.7 Really Low 04:33:52 - 05:03:52 -1366
Yerington 04:48:51 -13.6 AT Up 17.8 128.1 Really Low 04:33:51 - 05:03:51 -1368
Gardnerville 04:48:53 -13.3 AT Up 17.5 127.6 Really Low 04:33:53 - 05:03:53 -1383
Hawthorne 04:48:51 -14.2 AT Up 18.5 128.4 Really Low 04:33:51 - 05:03:51 -1392
Tonopah 04:48:49 -15.3 AT Up 19.6 129.4 Really Low 04:33:49 - 05:03:49 -1398
Lee Vining 04:48:54 -14.3 AT Up 18.5 127.9 Really Low 04:33:54 - 05:03:54 -1443
Bishop 04:48:53 -15.2 AT Up 19.3 128.3 Really Low 04:33:53 - 05:03:53 -1474
Beatty 04:48:50 -16.4 AT Up 20.6 129.4 Low 04:33:50 - 05:03:50 -1476
Indian Springs 04:48:48 -17.2 AT Up 21.5 130.2 Low 04:33:48 - 05:03:48 -1479
Henderson 04:48:47 -18.0 AT Up 22.3 130.6 Low 04:33:47 - 05:03:47 -1507
Patrick 04:48:45 -19.0 Dark Up 23.4 131.3 Low 04:33:45 - 05:03:45 -1532
Kingman/Dolan Springs 04:48:46 -19.1 Dark Up 23.4 131.0 Low 04:33:46 - 05:03:46 -1553
Laughlin/Bullhead City 04:48:48 -18.8 Dark Up 23.1 130.6 Low 04:33:48 - 05:03:48 -1566
Mohave Valley 04:48:49 -19.1 Dark Up 23.3 130.5 Low 04:33:49 - 05:03:49 -1587
Lake Havasu City 04:48:48 -19.5 Dark Up 23.7 130.6 Low 04:33:48 - 05:03:48 -1614
George/Scottsdale 04:48:43 -21.4 Dark Up 25.7 132.3 Low 04:33:43 - 05:03:43 -1625
Parker 04:48:49 -19.8 Dark Up 23.9 130.5 Low 04:33:49 - 05:03:49 -1641
CPSLO 04:49:02 -15.4 AT Up 19.1 126.0 Really Low 04:34:02 - 05:04:02 -1683
Blythe 04:48:51 -20.0 Dark Up 24.1 130.1 Low 04:33:51 - 05:03:51 -1689
Idyllwild 04:48:56 -18.7 Dark Up 22.7 128.5 Low 04:33:56 - 05:03:56 -1723
Wildwood 04:49:00 -17.4 AT Up 21.2 127.2 Low 04:34:00 - 05:04:00 -1735
Calipatria 04:48:54 -19.9 Dark Up 23.8 129.2 Low 04:33:54 - 05:03:54 -1748
Yuma 04:48:52 -20.7 Dark Up 24.7 129.8 Low 04:33:52 - 05:03:52 -1764

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, (2021/06/18 04:46UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9 24.40  73
35Eta Oph      17:10:22.7 -15:43:29  2.6 12.59  80
PPM 233766     17:56:19.0 -15:48:47  6.1  1.60  91
PPM 233912     18:01:16.7 -15:21:37  8.3  0.33  92
PPM 233931     18:01:58.5 -15:20:09  9.9  0.16  92
04KV18         18:02:37.4 -15:17:43 15.9        92
Positions are for J2000

Event circumstances last updated at 2021/04/18 22:56:44 UT

Marc W. Buie, Southwest Research Institute

RECON