RECON: TNO occultation with 01KO77

Event between 01KO77 and star UC4-374-103574 with event index number of 189494

Geocentric closest approach at 2019/05/15 09:40:13 UTC

J2000 position of star is 17:53:20.2 -15:12:51
Equinox of date position of star is 17:54:20.1 -15:13:01
Stellar brightness R=16.5, use SENSEUP=128
Star is 79 degrees from the moon. Moon is 85% illuminated.
TNO apparent brightness V=23.4

[RECON map]
TNO is 37.5 AU from the Sun and 36.7 AU from the Earth.
The TNO is moving 19.6 km/sec on the sky relative to the star, or, 2.7 arcsec/hr.
The 1-sigma error in the time of the event is 413 seconds.
The 1-sigma cross-track error in the shadow position is 2299 km.
The sky-plane scale is 26623.7 km/arcsec.

The TNO has an absolute magnitude Hv=7.6
Diameter=184.5 km assuming a 5% albedo -- 9.4 sec chord
Diameter=75.3 km assuming a 30% albedo -- 3.8 sec chord
Dynamical classification is SCATEXTD
 
 
 
 
 
 

Star training set for 01KO77, (2019/05/15 09:40UT)
Object            RA         Dec     mag  sep  mel
Antares        16:30:35.9 -26:28:24  0.9 22.54  62
35Eta Oph      17:11:29.4 -15:44:51  2.6 10.36  69
PPM 233766     17:57:25.9 -15:48:52  6.1  0.93  80
PPM 233690     17:53:10.8 -15:01:47  8.2  0.36  79
PPM 233721     17:55:12.8 -14:54:38  8.8  0.36  79
01KO77         17:54:26.8 -15:13:02 16.5        79
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 2.2 sigma about the mid-time.
The median site spacing is 13.3 km RECON observability=1.0 and success probability=0.1%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Oroville 09:41:49 -18.1 Dark Up 25.3 169.9 Low 09:26:49 - 09:56:49 10088
Tonasket 09:41:49 -18.3 Dark Up 25.5 169.9 Low 09:26:49 - 09:56:49 10076
Okanogan 09:41:50 -18.7 Dark Up 25.8 169.7 Low 09:26:50 - 09:56:50 10056
Brewster 09:41:51 -19.0 Dark Up 26.1 169.4 Low 09:26:51 - 09:56:51 10038
Manson/Chelan 09:41:52 -19.3 Dark Up 26.2 169.0 Low 09:26:52 - 09:56:52 10020
Entiat 09:41:52 -19.5 Dark Up 26.5 168.9 Low 09:26:52 - 09:56:52 10007
Wenatchee 09:41:52 -19.7 Dark Up 26.7 168.8 Low 09:26:52 - 09:56:52 9992
Ellensburg 09:41:53 -20.2 Dark Up 27.1 168.5 Low 09:26:53 - 09:56:53 9965
Pasco 09:41:48 -20.4 Dark Up 28.0 170.0 Low 09:26:48 - 09:56:48 9953
PNWRO 09:41:47 -20.5 Dark Up 28.2 170.2 Low 09:26:47 - 09:56:47 9944
Yakima 09:41:53 -20.5 Dark Up 27.5 168.5 Low 09:26:53 - 09:56:53 9943
Toppenish/White Swan 09:41:54 -20.7 Dark Up 27.7 168.6 Low 09:26:54 - 09:56:54 9934
George/Umatilla 09:41:49 -20.8 Dark Up 28.3 169.7 Low 09:26:49 - 09:56:49 9930
Goldendale 09:41:54 -21.3 Dark Up 28.2 168.1 Low 09:26:54 - 09:56:54 9895
The Dalles 09:41:55 -21.6 Dark Up 28.3 167.7 Low 09:26:55 - 09:56:55 9875
Niwot 09:40:51 -19.8 Dark Up 34.5 185.3 Up 09:25:51 - 09:55:51 9855
Maupin 09:41:55 -22.0 Dark Up 28.8 167.8 Low 09:26:55 - 09:56:55 9853
Madras/Culver 09:41:55 -22.5 Dark Up 29.3 167.7 Low 09:26:55 - 09:56:55 9821
Redmond 09:41:55 -22.8 Dark Up 29.6 167.6 Low 09:26:55 - 09:56:55 9799
Sisters 09:41:56 -22.9 Dark Up 29.6 167.1 Low 09:26:56 - 09:56:56 9792
Bend 09:41:56 -23.0 Dark Up 29.8 167.4 Low 09:26:56 - 09:56:56 9784
Oregon Observatory 09:41:56 -23.2 Dark Up 30.0 167.2 Low 09:26:56 - 09:56:56 9771
La Pine/Gilchrist 09:41:57 -23.4 Dark Up 30.2 167.1 Up 09:26:57 - 09:56:57 9758
North Lake 09:41:54 -23.6 Dark Up 30.7 167.7 Up 09:26:54 - 09:56:54 9744
Paisley 09:41:53 -24.0 Dark Up 31.3 168.0 Up 09:26:53 - 09:56:53 9718
Lakeview 09:41:54 -24.4 Dark Up 31.8 168.2 Up 09:26:54 - 09:56:54 9692
Chiloquin 09:41:59 -24.6 Dark Up 31.2 166.6 Up 09:26:59 - 09:56:59 9683
Klamath Falls 09:41:58 -24.8 Dark Up 31.5 166.6 Up 09:26:58 - 09:56:58 9663
Cedarville 09:41:51 -24.9 Dark Up 32.5 168.3 Up 09:26:51 - 09:56:51 9655
Tulelake 09:41:56 -25.0 Dark Up 31.9 166.9 Up 09:26:56 - 09:56:56 9653
Fall River/Burney 09:41:57 -25.8 Dark Up 32.8 166.9 Up 09:26:57 - 09:56:57 9597
Susanville 09:41:54 -26.1 Dark Up 33.5 167.6 Up 09:26:54 - 09:56:54 9573
Gimple 09:41:54 -26.4 Dark Up 33.7 167.3 Up 09:26:54 - 09:56:54 9550
Greenville 09:41:54 -26.4 Dark Up 33.7 167.2 Up 09:26:54 - 09:56:54 9549
Portola 09:41:52 -26.6 Dark Up 34.1 167.7 Up 09:26:52 - 09:56:52 9538
Quincy 09:41:54 -26.6 Dark Up 33.9 167.2 Up 09:26:54 - 09:56:54 9536
Reno 09:41:51 -26.6 Dark Up 34.5 168.4 Up 09:26:51 - 09:56:51 9535
Yerington 09:41:48 -26.8 Dark Up 35.1 169.1 Up 09:26:48 - 09:56:48 9513
Carson City 09:41:51 -26.9 Dark Up 34.8 168.4 Up 09:26:51 - 09:56:51 9512
Gardnerville 09:41:49 -27.1 Dark Up 35.1 168.4 Up 09:26:49 - 09:56:49 9497
Tonopah 09:41:41 -26.9 Dark Up 36.3 171.3 Up 09:26:41 - 09:56:41 9494
Hawthorne 09:41:47 -27.0 Dark Up 35.6 169.7 Up 09:26:47 - 09:56:47 9494
Lee Vining 09:41:48 -27.7 Dark Up 36.1 169.0 Up 09:26:48 - 09:56:48 9446
Indian Springs 09:41:32 -27.5 Dark Up 37.9 172.9 Up 09:26:32 - 09:56:32 9426
Beatty 09:41:37 -27.7 Dark Up 37.5 171.7 Up 09:26:37 - 09:56:37 9425
Bishop 09:41:44 -27.9 Dark Up 36.8 169.8 Up 09:26:44 - 09:56:44 9421
Henderson 09:41:22 -27.7 Dark Up 38.5 173.7 Up 09:26:22 - 09:56:22 9405
Patrick 09:41:22 -27.7 Dark Up 39.2 175.0 Up 09:26:22 - 09:56:22 9384
DCO 09:41:22 -27.6 Dark Up 39.6 175.9 Up 09:26:22 - 09:56:22 9378
Lone Pine 09:41:42 -28.5 Dark Up 37.6 170.1 Up 09:26:42 - 09:56:42 9376
Searchlight/Boulder City 09:41:22 -28.1 Dark Up 39.1 173.7 Up 09:26:22 - 09:56:22 9366
Kingman/Dolan Springs 09:41:22 -27.9 Dark Up 39.4 174.7 Up 09:26:22 - 09:56:22 9365
Laughlin/Bullhead City 09:41:22 -28.2 Dark Up 39.4 174.1 Up 09:26:22 - 09:56:22 9352
Mohave Valley 09:41:22 -28.4 Dark Up 39.7 174.1 Up 09:26:22 - 09:56:22 9333
Lake Havasu City 09:41:22 -28.6 Dark Up 40.1 174.4 Up 09:26:22 - 09:56:22 9309
Parker 09:41:22 -28.9 Dark Up 40.5 174.4 Up 09:26:22 - 09:56:22 9285
Blythe 09:41:22 -29.5 Dark Up 41.0 173.9 Up 09:26:22 - 09:56:22 9241
CPSLO 09:41:52 -30.6 Dark Up 38.5 166.8 Up 09:26:52 - 09:56:52 9224
Idyllwild 09:41:35 -30.3 Dark Up 40.6 171.3 Up 09:26:35 - 09:56:35 9203
Wildwood 09:41:44 -30.8 Dark Up 40.0 169.1 Up 09:26:44 - 09:56:44 9185
Calipatria 09:41:22 -30.3 Dark Up 41.4 172.7 Up 09:26:22 - 09:56:22 9185
Yuma 09:41:22 -30.2 Dark Up 41.9 173.8 Up 09:26:22 - 09:56:22 9172

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, (2019/05/15 09:40UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9 22.54  62
35Eta Oph      17:10:22.7 -15:43:29  2.6 10.36  69
PPM 233766     17:56:19.0 -15:48:46  6.1  0.93  80
PPM 233690     17:52:04.2 -15:01:34  8.2  0.36  79
PPM 233721     17:54:06.4 -14:54:28  8.8  0.36  79
01KO77         17:53:20.2 -15:12:51 16.5        79
Positions are for J2000

Event circumstances last updated at 2017/06/01 18:12:23 UT

Marc W. Buie, Southwest Research Institute

RECON