RECON: TNO occultation with 01KO77

Event between 01KO77 and star GA0740:12936606 with event index number of 288913

Geocentric closest approach at 2020/09/25 03:25:34 UTC

J2000 position of star is 17:52:25.2 -14:39:46
Equinox of date position of star is 17:53:29.3 -14:39:58
Stellar brightness G=16.3, use SENSEUP=128
Star is 20 degrees from the moon. Moon is 61% illuminated.
TNO apparent brightness V=23.5

[RECON map]
TNO is 37.6 AU from the Sun and 37.6 AU from the Earth.
The TNO is moving 8.1 km/sec on the sky relative to the star, or, 1.1 arcsec/hr.
The 1-sigma error in the time of the event is 657 seconds.
The 1-sigma cross-track error in the shadow position is 4342 km.
The sky-plane scale is 27286.6 km/arcsec.

The TNO has an absolute magnitude Hv=7.6
Diameter=184.5 km assuming a 5% albedo -- 22.9 sec chord
Diameter=75.3 km assuming a 30% albedo -- 9.3 sec chord
Dynamical classification is SCATEXTD
 
 
 
 
 
 

Star training set for 01KO77, (2020/09/25 03:26UT)
Object            RA         Dec     mag  sep  mel
Antares        16:30:40.9 -26:28:34  0.9 22.67  36
35Eta Oph      17:11:34.1 -15:44:57  2.6 10.20  29
PPM 233599     17:48:47.8 -14:43:55  5.9  1.16  21
PPM 233690     17:53:15.4 -15:01:47  8.2  0.37  20
PPM 233691     17:53:16.6 -14:39:38  9.9  0.08  20
01KO77         17:53:36.2 -14:39:59 16.3        20
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 1.4 sigma about the mid-time.
The median site spacing is 10.0 km RECON observability=1.0 and success probability=1.3%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Rutland 03:24:55 -15.9 AT Up 20.8 209.2 Low 03:09:55 - 03:39:55 10162
Penticton 03:25:01 -16.0 AT Up 21.2 209.2 Low 03:10:01 - 03:40:01 10147
Okanagan Falls 03:25:01 -16.0 AT Up 21.4 209.2 Low 03:10:01 - 03:40:01 10141
Southern Okanagan 03:25:00 -16.1 AT Up 21.5 209.2 Low 03:10:00 - 03:40:00 10136
Oroville 03:25:03 -16.2 AT Up 21.7 209.4 Low 03:10:03 - 03:40:03 10129
Tonasket 03:25:05 -16.3 AT Up 21.9 209.5 Low 03:10:05 - 03:40:05 10121
Okanogan 03:25:04 -16.3 AT Up 22.2 209.4 Low 03:10:04 - 03:40:04 10107
Brewster 03:25:07 -16.3 AT Up 22.5 209.2 Low 03:10:07 - 03:40:07 10094
Manson/Chelan 03:25:05 -16.1 AT Up 22.8 208.9 Low 03:10:05 - 03:40:05 10081
Entiat 03:25:07 -16.1 AT Up 23.0 208.9 Low 03:10:07 - 03:40:07 10072
Wenatchee 03:25:07 -16.1 AT Up 23.3 208.8 Low 03:10:07 - 03:40:07 10061
Ellensburg 03:25:10 -16.1 AT Up 23.7 208.7 Low 03:10:10 - 03:40:10 10042
Pasco 03:25:24 -17.3 AT Up 23.9 210.4 Low 03:10:24 - 03:40:24 10037
PNWRO 03:25:28 -17.5 AT Up 24.0 210.7 Low 03:10:28 - 03:40:28 10031
Yakima 03:25:10 -16.2 AT Up 24.1 208.8 Low 03:10:10 - 03:40:10 10026
Toppenish/White Swan 03:25:14 -16.4 AT Up 24.2 209.0 Low 03:10:14 - 03:40:14 10020
George/Umatilla 03:25:26 -17.3 AT Up 24.2 210.2 Low 03:10:26 - 03:40:26 10020
Goldendale 03:25:11 -16.3 AT Up 24.9 208.7 Low 03:10:11 - 03:40:11 9991
The Dalles 03:25:07 -16.1 AT Up 25.2 208.4 Low 03:10:07 - 03:40:07 9976
Maupin 03:25:11 -16.3 AT Up 25.5 208.6 Low 03:10:11 - 03:40:11 9961
Niwot 03:28:17 -29.5 Dark Up 22.1 225.6 Low 03:13:17 - 03:43:17 9956
Madras/Culver 03:25:17 -16.4 AT Up 26.0 208.7 Low 03:10:17 - 03:40:17 9937
Redmond 03:25:18 -16.5 AT Up 26.3 208.7 Low 03:10:18 - 03:40:18 9921
Sisters 03:25:14 -16.2 AT Up 26.4 208.3 Low 03:10:14 - 03:40:14 9915
Bend 03:25:21 -16.4 AT Up 26.6 208.7 Low 03:10:21 - 03:40:21 9909
Oregon Observatory 03:25:18 -16.4 AT Up 26.8 208.6 Low 03:10:18 - 03:40:18 9900
La Pine/Gilchrist 03:25:21 -16.4 AT Up 27.0 208.6 Low 03:10:21 - 03:40:21 9890
North Lake 03:25:30 -17.0 AT Up 27.1 209.3 Low 03:10:30 - 03:40:30 9881
Paisley 03:25:38 -17.4 AT Up 27.4 209.9 Low 03:10:38 - 03:40:38 9863
Lakeview 03:25:42 -17.7 AT Up 27.8 210.2 Low 03:10:42 - 03:40:42 9844
Chiloquin 03:25:21 -16.4 AT Up 28.1 208.5 Low 03:10:21 - 03:40:21 9833
Klamath Falls 03:25:25 -16.6 AT Up 28.3 208.7 Low 03:10:25 - 03:40:25 9819
Cedarville 03:25:48 -18.0 AT Up 28.3 210.6 Low 03:10:48 - 03:40:48 9816
Tulelake 03:25:34 -16.9 AT Up 28.4 209.1 Low 03:10:34 - 03:40:34 9812
Fall River/Burney 03:25:39 -17.2 AT Up 29.2 209.4 Low 03:10:39 - 03:40:39 9771
Susanville 03:25:49 -17.9 AT Up 29.4 210.4 Low 03:10:49 - 03:40:49 9754
Gimple 03:25:50 -17.8 AT Up 29.8 210.3 Low 03:10:50 - 03:40:50 9736
Greenville 03:25:49 -17.8 AT Up 29.8 210.2 Low 03:10:49 - 03:40:49 9735
Portola 03:25:54 -18.2 Dark Up 29.9 210.8 Low 03:10:54 - 03:40:54 9728
Reno 03:26:01 -18.8 Dark Up 29.8 211.6 Low 03:11:01 - 03:41:01 9727
Quincy 03:25:51 -17.8 AT Up 30.0 210.3 Low 03:10:51 - 03:40:51 9725
Yerington 03:26:14 -19.5 Dark Up 30.0 212.5 Up 03:11:14 - 03:41:14 9711
Carson City 03:26:07 -18.9 Dark Up 30.1 211.7 Up 03:11:07 - 03:41:07 9709
Tonopah 03:26:39 -21.3 Dark Up 29.9 214.8 Low 03:11:39 - 03:41:39 9697
Gardnerville 03:26:07 -19.0 Dark Up 30.3 211.8 Up 03:11:07 - 03:41:07 9697
Hawthorne 03:26:24 -20.0 Dark Up 30.2 213.2 Up 03:11:24 - 03:41:24 9697
Lee Vining 03:26:23 -19.8 Dark Up 30.8 212.9 Up 03:11:23 - 03:41:23 9658
Indian Springs 03:26:42 -22.9 Dark Up 30.4 216.8 Up 03:11:42 - 03:41:42 9647
Beatty 03:26:42 -21.9 Dark Up 30.6 215.7 Up 03:11:42 - 03:41:42 9644
Bishop 03:26:38 -20.6 Dark Up 31.0 213.9 Up 03:11:38 - 03:41:38 9640
Henderson 03:26:42 -23.6 Dark Up 30.5 217.7 Up 03:11:42 - 03:41:42 9631
Patrick 03:26:42 -24.6 Dark Up 30.4 219.0 Up 03:11:42 - 03:41:42 9619
Lone Pine 03:26:40 -21.0 Dark Up 31.5 214.5 Up 03:11:40 - 03:41:40 9605
DCO 03:27:42 -25.5 Dark Up 30.1 220.0 Up 03:12:42 - 03:42:42 9604
Kingman/Dolan Springs 03:26:42 -24.5 Dark Up 30.7 218.9 Up 03:11:42 - 03:41:42 9604
Searchlight/Boulder City 03:26:42 -23.8 Dark Up 30.9 218.0 Up 03:11:42 - 03:41:42 9602
Laughlin/Bullhead City 03:26:42 -24.1 Dark Up 31.0 218.4 Up 03:11:42 - 03:41:42 9592
Mohave Valley 03:26:42 -24.2 Dark Up 31.2 218.5 Up 03:11:42 - 03:41:42 9578
Lake Havasu City 03:26:42 -24.5 Dark Up 31.3 218.9 Up 03:11:42 - 03:41:42 9561
Parker 03:27:38 -24.8 Dark Up 31.5 219.3 Up 03:12:38 - 03:42:38 9531
Blythe 03:27:38 -24.8 Dark Up 32.0 219.2 Up 03:12:38 - 03:42:38 9496
CPSLO 03:26:28 -19.2 Dark Up 33.7 212.2 Up 03:11:28 - 03:41:28 9482
Idyllwild 03:26:42 -22.8 Dark Up 33.2 216.9 Up 03:11:42 - 03:41:42 9471
Calipatria 03:26:42 -23.9 Dark Up 33.0 218.3 Up 03:11:42 - 03:41:42 9460
Wildwood 03:26:41 -21.2 Dark Up 33.8 214.8 Up 03:11:41 - 03:41:41 9453
Yuma 03:27:45 -25.0 Dark Up 32.8 219.6 Up 03:12:45 - 03:42:45 9440

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 01KO77, (2020/09/25 03:26UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9 22.67  36
35Eta Oph      17:10:22.7 -15:43:29  2.6 10.20  29
PPM 233599     17:47:36.7 -14:43:33  5.9  1.16  21
PPM 233690     17:52:04.2 -15:01:34  8.2  0.37  20
PPM 233691     17:52:05.6 -14:39:25  9.9  0.08  20
01KO77         17:52:25.2 -14:39:46 16.3        20
Positions are for J2000

Event circumstances last updated at 2018/09/26 17:37:50 UT

Marc W. Buie, Southwest Research Institute

RECON