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 17:54:21.9 -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 09:41:51 -18.1 Dark Up 25.3 169.9 Low 09:26:51 - 09:56:51 10075
Tonasket 09:41:51 -18.3 Dark Up 25.5 169.9 Low 09:26:51 - 09:56:51 10063
Okanogan 09:41:51 -18.7 Dark Up 25.8 169.7 Low 09:26:51 - 09:56:51 10043
Brewster 09:41:52 -19.0 Dark Up 26.1 169.4 Low 09:26:52 - 09:56:52 10025
Manson/Chelan 09:41:52 -19.3 Dark Up 26.2 169.0 Low 09:26:52 - 09:56:52 10007
Entiat 09:41:52 -19.5 Dark Up 26.5 168.9 Low 09:26:52 - 09:56:52 9994
Wenatchee 09:41:55 -19.7 Dark Up 26.7 168.8 Low 09:26:55 - 09:56:55 9979
Ellensburg 09:41:55 -20.2 Dark Up 27.1 168.5 Low 09:26:55 - 09:56:55 9952
Pasco 09:41:50 -20.4 Dark Up 28.0 170.0 Low 09:26:50 - 09:56:50 9939
PNWRO 09:41:50 -20.5 Dark Up 28.3 170.2 Low 09:26:50 - 09:56:50 9930
Yakima 09:41:54 -20.5 Dark Up 27.5 168.5 Low 09:26:54 - 09:56:54 9930
Toppenish/White Swan 09:41:54 -20.7 Dark Up 27.7 168.6 Low 09:26:54 - 09:56:54 9921
George/Umatilla 09:41:51 -20.8 Dark Up 28.3 169.7 Low 09:26:51 - 09:56:51 9917
Goldendale 09:41:57 -21.3 Dark Up 28.2 168.1 Low 09:26:57 - 09:56:57 9882
The Dalles 09:41:58 -21.6 Dark Up 28.3 167.7 Low 09:26:58 - 09:56:58 9861
Niwot 09:40:54 -19.8 Dark Up 34.5 185.3 Up 09:25:54 - 09:55:54 9841
Maupin 09:41:56 -22.0 Dark Up 28.8 167.8 Low 09:26:56 - 09:56:56 9840
Madras/Culver 09:41:57 -22.5 Dark Up 29.3 167.7 Low 09:26:57 - 09:56:57 9807
Redmond 09:41:59 -22.8 Dark Up 29.6 167.6 Low 09:26:59 - 09:56:59 9785
Sisters 09:41:58 -22.9 Dark Up 29.6 167.1 Low 09:26:58 - 09:56:58 9778
Bend 09:41:58 -23.0 Dark Up 29.8 167.4 Low 09:26:58 - 09:56:58 9770
Oregon Observatory 09:41:59 -23.2 Dark Up 30.0 167.2 Low 09:26:59 - 09:56:59 9757
La Pine/Gilchrist 09:41:59 -23.4 Dark Up 30.2 167.1 Up 09:26:59 - 09:56:59 9743
North Lake 09:41:57 -23.6 Dark Up 30.7 167.7 Up 09:26:57 - 09:56:57 9730
Paisley 09:41:55 -24.0 Dark Up 31.3 168.1 Up 09:26:55 - 09:56:55 9704
Lakeview 09:41:55 -24.4 Dark Up 31.8 168.2 Up 09:26:55 - 09:56:55 9677
Chiloquin 09:42:01 -24.6 Dark Up 31.2 166.6 Up 09:27:01 - 09:57:01 9668
Klamath Falls 09:42:01 -24.8 Dark Up 31.5 166.6 Up 09:27:01 - 09:57:01 9648
Cedarville 09:41:55 -24.9 Dark Up 32.5 168.3 Up 09:26:55 - 09:56:55 9640
Tulelake 09:41:59 -25.0 Dark Up 31.9 166.9 Up 09:26:59 - 09:56:59 9638
Fall River/Burney 09:41:59 -25.8 Dark Up 32.8 166.9 Up 09:26:59 - 09:56:59 9583
Susanville 09:41:57 -26.1 Dark Up 33.5 167.6 Up 09:26:57 - 09:56:57 9559
Gimple 09:41:56 -26.4 Dark Up 33.7 167.3 Up 09:26:56 - 09:56:56 9536
Greenville 09:41:57 -26.4 Dark Up 33.7 167.3 Up 09:26:57 - 09:56:57 9534
Portola 09:41:55 -26.6 Dark Up 34.1 167.8 Up 09:26:55 - 09:56:55 9523
Quincy 09:41:56 -26.6 Dark Up 33.9 167.2 Up 09:26:56 - 09:56:56 9521
Reno 09:41:52 -26.6 Dark Up 34.5 168.5 Up 09:26:52 - 09:56:52 9520
Yerington 09:41:49 -26.8 Dark Up 35.1 169.1 Up 09:26:49 - 09:56:49 9498
Carson City 09:41:52 -26.9 Dark Up 34.8 168.4 Up 09:26:52 - 09:56:52 9497
Gardnerville 09:41:52 -27.1 Dark Up 35.1 168.4 Up 09:26:52 - 09:56:52 9482
Hawthorne 09:41:47 -27.0 Dark Up 35.6 169.7 Up 09:26:47 - 09:56:47 9479
Tonopah 09:41:41 -26.9 Dark Up 36.3 171.3 Up 09:26:41 - 09:56:41 9479
Lee Vining 09:41:48 -27.7 Dark Up 36.1 169.0 Up 09:26:48 - 09:56:48 9430
Indian Springs 09:41:34 -27.5 Dark Up 37.9 172.9 Up 09:26:34 - 09:56:34 9412
Beatty 09:41:39 -27.7 Dark Up 37.5 171.7 Up 09:26:39 - 09:56:39 9410
Bishop 09:41:46 -27.9 Dark Up 36.8 169.8 Up 09:26:46 - 09:56:46 9406
Henderson 09:41:22 -27.7 Dark Up 38.5 173.7 Up 09:26:22 - 09:56:22 9391
Patrick 09:41:22 -27.7 Dark Up 39.2 175.0 Up 09:26:22 - 09:56:22 9370
DCO 09:41:22 -27.6 Dark Up 39.6 175.9 Up 09:26:22 - 09:56:22 9363
Lone Pine 09:41:45 -28.5 Dark Up 37.6 170.1 Up 09:26:45 - 09:56:45 9361
Searchlight/Boulder City 09:41:22 -28.1 Dark Up 39.1 173.7 Up 09:26:22 - 09:56:22 9353
Kingman/Dolan Springs 09:41:22 -27.9 Dark Up 39.4 174.7 Up 09:26:22 - 09:56:22 9351
Laughlin/Bullhead City 09:41:22 -28.2 Dark Up 39.4 174.1 Up 09:26:22 - 09:56:22 9339
Mohave Valley 09:41:22 -28.4 Dark Up 39.7 174.1 Up 09:26:22 - 09:56:22 9319
Lake Havasu City 09:41:22 -28.6 Dark Up 40.1 174.4 Up 09:26:22 - 09:56:22 9296
Parker 09:41:22 -28.9 Dark Up 40.5 174.4 Up 09:26:22 - 09:56:22 9271
Blythe 09:41:22 -29.5 Dark Up 41.0 173.9 Up 09:26:22 - 09:56:22 9227
CPSLO 09:41:56 -30.6 Dark Up 38.5 166.8 Up 09:26:56 - 09:56:56 9210
Idyllwild 09:41:37 -30.3 Dark Up 40.6 171.3 Up 09:26:37 - 09:56:37 9188
Wildwood 09:41:46 -30.8 Dark Up 40.0 169.1 Up 09:26:46 - 09:56:46 9170
Calipatria 09:41:33 -30.3 Dark Up 41.4 172.7 Up 09:26:33 - 09:56:33 9170
Yuma 09:41:22 -30.2 Dark Up 41.9 173.8 Up 09:26:22 - 09:56:22 9159

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 2017/12/06 18:56:16 UT

Marc W. Buie, Southwest Research Institute

RECON