RECON: TNO occultation with 500885

Event between (500885) 13JL65 and star GA0740:06675585 with event index number of 266559

Geocentric closest approach at 2020/05/24 07:24:26 UTC

J2000 position of star is 17:01:42.9 -15:42:45
Equinox of date position of star is 17:02:49.7 -15:44:22
Stellar brightness G=16.0, use SENSEUP=128
Star is 171 degrees from the moon. Moon is 2% illuminated.
TNO apparent brightness V=24.6

[RECON map]
TNO is 36.4 AU from the Sun and 35.4 AU from the Earth.
The TNO is moving 23.7 km/sec on the sky relative to the star, or, 3.3 arcsec/hr.
The 1-sigma error in the time of the event is 1072 seconds.
The 1-sigma cross-track error in the shadow position is 4042 km.
The sky-plane scale is 25656.4 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 3:2E
 
 
 
 
 
 

Star training set for 500885, (2020/05/24 07:24UT)
Object            RA         Dec     mag  sep  mel
Antares        16:30:39.7 -26:28:32  0.9 13.09 167
35Eta Oph      17:11:33.0 -15:44:56  2.6  2.09 173
PPM 232348     16:57:12.6 -16:50:13  6.3  1.75 171
PPM 232432     17:00:33.7 -16:05:38  7.9  0.66 171
PPM 232493     17:03:13.0 -15:36:22  9.4  0.16 171
500885         17:02:53.1 -15:44:27 16.0       172
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 0.8 sigma about the mid-time.
The median site spacing is 13.1 km RECON observability=1.0 and success probability=1.9%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Kelowna 07:25:57 -19.0 Dark Down 21.8 158.2 Low 07:10:57 - 07:40:57 9794
Summerland 07:25:59 -19.2 Dark Down 22.0 157.9 Low 07:10:59 - 07:40:59 9774
Penticton 07:25:58 -19.3 Dark Down 22.1 158.0 Low 07:10:58 - 07:40:58 9773
Okanagan Falls 07:25:58 -19.5 Dark Down 22.3 157.9 Low 07:10:58 - 07:40:58 9763
Oliver 07:25:59 -19.7 Dark Down 22.5 157.9 Low 07:10:59 - 07:40:59 9754
Anarchist Mountain Observatory 07:25:58 -19.8 Dark Down 22.7 158.1 Low 07:10:58 - 07:40:58 9748
Oroville 07:25:59 -19.9 Dark Down 22.7 158.0 Low 07:10:59 - 07:40:59 9743
Tonasket 07:25:59 -20.1 Dark Down 22.9 158.0 Low 07:10:59 - 07:40:59 9731
Okanogan 07:26:00 -20.5 Dark Down 23.2 157.8 Low 07:11:00 - 07:41:00 9711
Brewster 07:26:01 -20.7 Dark Down 23.4 157.5 Low 07:11:01 - 07:41:01 9693
Manson/Chelan 07:26:02 -20.9 Dark Down 23.5 157.1 Low 07:11:02 - 07:41:02 9676
Entiat 07:26:02 -21.1 Dark Down 23.7 157.0 Low 07:11:02 - 07:41:02 9663
Wenatchee 07:26:03 -21.3 Dark Down 23.9 156.9 Low 07:11:03 - 07:41:03 9647
Ellensburg 07:26:04 -21.7 Dark Down 24.2 156.6 Low 07:11:04 - 07:41:04 9621
Pasco 07:26:00 -22.6 Dark Down 25.3 157.9 Low 07:11:00 - 07:41:00 9602
Yakima 07:26:04 -22.1 Dark Down 24.6 156.5 Low 07:11:04 - 07:41:04 9597
PNWRO 07:25:59 -22.9 Dark Down 25.6 158.1 Low 07:10:59 - 07:40:59 9592
Toppenish/White Swan 07:26:04 -22.4 Dark Down 24.8 156.6 Low 07:11:04 - 07:41:04 9588
George/Umatilla 07:26:01 -22.9 Dark Down 25.5 157.6 Low 07:11:01 - 07:41:01 9579
Goldendale 07:26:05 -22.9 Dark Down 25.2 156.1 Low 07:11:05 - 07:41:05 9549
The Dalles 07:26:07 -23.0 Dark Down 25.3 155.7 Low 07:11:07 - 07:41:07 9530
Maupin 07:26:07 -23.5 Dark Down 25.7 155.7 Low 07:11:07 - 07:41:07 9507
Madras/Culver 07:26:08 -24.0 Dark Down 26.2 155.6 Low 07:11:08 - 07:41:08 9474
Redmond 07:26:08 -24.4 Dark Down 26.5 155.5 Low 07:11:08 - 07:41:08 9452
Sisters 07:26:09 -24.3 Dark Down 26.4 155.1 Low 07:11:09 - 07:41:09 9446
Niwot 07:25:19 -28.7 Dark Down 33.8 172.0 Up 07:10:19 - 07:40:19 9441
Bend 07:26:09 -24.6 Dark Down 26.7 155.3 Low 07:11:09 - 07:41:09 9436
SwRI 07:25:18 -28.8 Dark Down 33.9 171.9 Up 07:10:18 - 07:40:18 9433
Oregon Observatory 07:26:09 -24.7 Dark Down 26.8 155.1 Low 07:11:09 - 07:41:09 9423
La Pine/Gilchrist 07:26:10 -24.9 Dark Down 27.0 155.0 Low 07:11:10 - 07:41:10 9410
North Lake 07:26:08 -25.4 Dark Down 27.6 155.5 Low 07:11:08 - 07:41:08 9393
Paisley 07:26:08 -26.0 Dark Down 28.2 155.8 Low 07:11:08 - 07:41:08 9365
Lakeview 07:26:07 -26.5 Dark Down 28.7 155.9 Low 07:11:07 - 07:41:07 9337
Chiloquin 07:26:12 -26.0 Dark Down 27.9 154.4 Low 07:11:12 - 07:41:12 9334
Klamath Falls 07:26:12 -26.3 Dark Down 28.2 154.4 Low 07:11:12 - 07:41:12 9314
Tulelake 07:26:12 -26.6 Dark Down 28.5 154.6 Low 07:11:12 - 07:41:12 9302
Cedarville 07:26:08 -27.2 Dark Down 29.3 155.9 Low 07:11:08 - 07:41:08 9298
Fall River/Burney 07:26:12 -27.5 Dark Down 29.4 154.5 Low 07:11:12 - 07:41:12 9244
Susanville 07:26:10 -28.2 Dark Down 30.2 155.1 Up 07:11:10 - 07:41:10 9216
Gimple 07:26:11 -28.5 Dark Down 30.4 154.8 Up 07:11:11 - 07:41:11 9194
Greenville 07:26:11 -28.5 Dark Down 30.4 154.8 Up 07:11:11 - 07:41:11 9193
Portola 07:26:10 -28.8 Dark Down 30.8 155.2 Up 07:11:10 - 07:41:10 9180
Quincy 07:26:11 -28.7 Dark Down 30.5 154.7 Up 07:11:11 - 07:41:11 9179
Reno 07:26:08 -29.2 Dark Down 31.3 155.8 Up 07:11:08 - 07:41:08 9174
Carson City 07:26:08 -29.5 Dark Down 31.6 155.7 Up 07:11:08 - 07:41:08 9150
Yerington 07:26:06 -29.8 Dark Down 32.0 156.3 Up 07:11:06 - 07:41:06 9148
Gardnerville 07:26:08 -29.8 Dark Down 31.8 155.7 Up 07:11:08 - 07:41:08 9134
Hawthorne 07:26:04 -30.3 Dark Down 32.6 156.8 Up 07:11:04 - 07:41:04 9126
Tonopah 07:26:00 -30.9 Dark Down 33.4 158.2 Up 07:11:00 - 07:41:00 9119
Lee Vining 07:26:07 -30.8 Dark Down 32.9 156.1 Up 07:11:07 - 07:41:07 9078
Bishop 07:26:05 -31.5 Dark Down 33.7 156.8 Up 07:11:05 - 07:41:05 9050
Beatty 07:25:58 -32.1 Dark Down 34.6 158.4 Up 07:10:58 - 07:40:58 9047
Indian Springs 07:25:56 -32.5 Dark Down 35.2 159.5 Up 07:10:56 - 07:40:56 9043
Henderson 07:25:54 -33.0 Dark Down 35.9 160.2 Up 07:10:54 - 07:40:54 9017
Lone Pine 07:26:04 -32.3 Dark Down 34.5 156.9 Up 07:11:04 - 07:41:04 9002
Patrick 07:25:50 -33.7 Dark Down 36.8 161.3 Up 07:10:50 - 07:40:50 8992
DCO 07:25:47 -34.0 Dark Down 37.3 162.0 Up 07:10:47 - 07:40:47 8982
Searchlight/Boulder City 07:25:54 -33.6 Dark Down 36.5 160.1 Up 07:10:54 - 07:40:54 8977
Kingman/Dolan Springs 07:25:51 -33.9 Dark Down 37.0 161.0 Up 07:10:51 - 07:40:51 8973
Laughlin/Bullhead City 07:25:53 -33.9 Dark Down 36.9 160.4 Up 07:10:53 - 07:40:53 8962
Mohave Valley 07:25:52 -34.2 Dark Down 37.1 160.4 Up 07:10:52 - 07:40:52 8942
Lake Havasu City 07:25:52 -34.6 Dark Down 37.6 160.5 Up 07:10:52 - 07:40:52 8917
Parker 07:25:52 -35.0 Dark Down 37.9 160.5 Up 07:10:52 - 07:40:52 8892
CPSLO 07:26:13 -33.3 Dark Down 34.8 153.7 Up 07:11:13 - 07:41:13 8859
Blythe 07:25:53 -35.5 Dark Down 38.3 160.0 Up 07:10:53 - 07:40:53 8848
Idyllwild 07:26:01 -35.2 Dark Down 37.6 157.6 Up 07:11:01 - 07:41:01 8818
Wildwood 07:26:06 -34.7 Dark Down 36.6 155.6 Up 07:11:06 - 07:41:06 8809
Calipatria 07:25:57 -35.9 Dark Down 38.5 158.8 Up 07:10:57 - 07:40:57 8794
Yuma 07:25:53 -36.4 Dark Down 39.2 159.7 Up 07:10:53 - 07:40:53 8778

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 500885, (2020/05/24 07:24UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9 13.09 167
35Eta Oph      17:10:22.7 -15:43:29  2.6  2.09 173
PPM 232348     16:56:02.0 -16:48:22  6.3  1.75 171
PPM 232432     16:59:23.4 -16:03:52  7.9  0.66 171
PPM 232493     17:02:02.9 -15:34:41  9.4  0.16 171
500885         17:01:42.9 -15:42:45 16.0       171
Positions are for J2000

Event circumstances last updated at 2019/06/07 23:41:24 UT

Marc W. Buie, Southwest Research Institute

RECON