RECON: TNO occultation with 517717

Event between (517717) 15KZ120 and star GA1560:03255540 with event index number of 1030673

Geocentric closest approach at 2020/12/16 08:19:54 UTC

J2000 position of star is 19:15:03.8 +67:23:12
Equinox of date position of star is 19:15:04.5 +67:25:27
Stellar brightness G=14.3, use SENSEUP=64
Star is 92 degrees from the moon. Moon is 4% illuminated.
TNO apparent brightness V=20.1

[RECON map]
TNO is 9.1 AU from the Sun and 9.0 AU from the Earth.
The TNO is moving 35.7 km/sec on the sky relative to the star, or, 19.7 arcsec/hr.
The 1-sigma error in the time of the event is 10 seconds.
The 1-sigma cross-track error in the shadow position is 476 km.
The sky-plane scale is 6501.0 km/arcsec.

The TNO has an absolute magnitude Hv=10.1
Diameter=57.5 km assuming a 5% albedo -- 1.6 sec chord
Diameter=23.5 km assuming a 30% albedo -- 0.7 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 

Star training set for 517717, (2020/12/16 08:20UT)
Object            RA         Dec     mag  sep  mel
Deneb          20:42:08.8 +45:21:22  1.3 24.84  73
Alderamin      21:19:04.7 +62:40:29  2.4 13.74  91
55 Dra         19:09:50.2 +66:00:49  6.3  1.50  91
PPM 021399     19:16:25.8 +67:10:23  8.0  0.28  92
517717         19:15:04.5 +67:25:27 14.3        92
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 5.0 sigma about the mid-time.
The median site spacing is 11.7 km RECON observability=0.5 and success probability=0.0%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
George/Scottsdale 08:20:16 -73.7 Dark Down 11.4 356.1 Really Low 08:18:58 - 08:21:34 5801
Yuma 08:20:22 -76.2 Dark Down 10.6 355.0 Really Low 08:19:04 - 08:21:40 5780
Blythe 08:20:22 -75.6 Dark Down 11.5 355.0 Really Low 08:19:04 - 08:21:40 5762
Parker 08:20:21 -75.0 Dark Down 12.0 355.1 Really Low 08:19:03 - 08:21:39 5756
Calipatria 08:20:25 -76.5 Dark Down 11.0 354.7 Really Low 08:19:07 - 08:21:43 5756
DCO 08:20:18 -73.7 Dark Down 12.9 355.5 Really Low 08:19:00 - 08:21:36 5753
Lake Havasu City 08:20:21 -74.8 Dark Down 12.3 355.1 Really Low 08:19:03 - 08:21:39 5749
Kingman/Dolan Springs 08:20:21 -74.2 Dark Down 13.0 355.2 Really Low 08:19:03 - 08:21:39 5738
Mohave Valley 08:20:22 -74.7 Dark Down 12.7 355.0 Really Low 08:19:04 - 08:21:40 5735
Patrick 08:20:20 -73.9 Dark Down 13.2 355.2 Really Low 08:19:02 - 08:21:38 5735
Laughlin/Bullhead City 08:20:21 -74.5 Dark Down 13.0 355.0 Really Low 08:19:03 - 08:21:39 5729
Idyllwild 08:20:28 -76.7 Dark Down 11.8 354.2 Really Low 08:19:10 - 08:21:46 5723
Searchlight/Boulder City 08:20:22 -74.4 Dark Down 13.3 354.8 Really Low 08:19:04 - 08:21:40 5717
Henderson 08:20:23 -74.0 Dark Down 13.9 354.8 Really Low 08:19:05 - 08:21:41 5702
SwRI 08:19:58 -65.8 Dark Down 17.4 358.6 Really Low 08:18:40 - 08:21:16 5682
Niwot 08:19:58 -65.7 Dark Down 17.5 358.6 Really Low 08:18:40 - 08:21:16 5679
Indian Springs 08:20:24 -74.0 Dark Down 14.5 354.5 Really Low 08:19:06 - 08:21:42 5677
Wildwood 08:20:32 -77.4 Dark Down 12.3 353.5 Really Low 08:19:14 - 08:21:50 5675
Beatty 08:20:26 -74.2 Dark Down 14.9 354.1 Really Low 08:19:08 - 08:21:44 5649
Tonopah 08:20:27 -73.4 Dark Down 16.1 353.9 Really Low 08:19:09 - 08:21:45 5610
Bishop 08:20:30 -74.5 Dark Down 15.5 353.5 Really Low 08:19:12 - 08:21:48 5604
CPSLO 08:20:37 -77.1 Dark Down 13.7 352.7 Really Low 08:19:19 - 08:21:55 5601
Lee Vining 08:20:31 -74.2 Dark Down 16.2 353.2 Really Low 08:19:13 - 08:21:49 5574
Hawthorne 08:20:30 -73.5 Dark Down 16.7 353.3 Really Low 08:19:12 - 08:21:48 5568
Yerington 08:20:31 -73.2 Dark Down 17.2 353.1 Really Low 08:19:13 - 08:21:49 5543
Gardnerville 08:20:32 -73.5 Dark Down 17.2 352.9 Really Low 08:19:14 - 08:21:50 5532
Carson City 08:20:32 -73.2 Dark Down 17.4 352.8 Really Low 08:19:14 - 08:21:50 5524
Reno 08:20:33 -72.9 Dark Down 17.8 352.8 Really Low 08:19:15 - 08:21:51 5513
Portola 08:20:33 -72.8 Dark Down 18.1 352.6 Really Low 08:19:15 - 08:21:51 5490
Quincy 08:20:34 -72.8 Dark Down 18.3 352.4 Really Low 08:19:16 - 08:21:52 5474
Gimple 08:20:34 -72.6 Dark Down 18.5 352.4 Really Low 08:19:16 - 08:21:52 5470
Greenville 08:20:34 -72.6 Dark Down 18.5 352.4 Really Low 08:19:16 - 08:21:52 5468
Susanville 08:20:33 -72.3 Dark Down 18.7 352.5 Really Low 08:19:15 - 08:21:51 5467
Cedarville 08:20:32 -71.1 Dark Down 19.8 352.6 Really Low 08:19:14 - 08:21:50 5442
Fall River/Burney 08:20:35 -71.8 Dark Down 19.4 352.1 Really Low 08:19:17 - 08:21:53 5429
Lakeview 08:20:31 -70.5 Dark Down 20.5 352.5 Low 08:19:13 - 08:21:49 5416
Paisley 08:20:32 -70.1 Dark Down 21.0 352.4 Low 08:19:14 - 08:21:50 5394
Klamath Falls 08:20:35 -70.8 Dark Down 20.7 351.9 Low 08:19:17 - 08:21:53 5381
North Lake 08:20:32 -69.6 Dark Down 21.6 352.2 Low 08:19:14 - 08:21:50 5366
La Pine/Gilchrist 08:20:33 -69.3 Dark Down 22.1 352.0 Low 08:19:15 - 08:21:51 5337
Oregon Observatory 08:20:33 -69.1 Dark Down 22.3 352.0 Low 08:19:15 - 08:21:51 5331
Bend 08:20:32 -68.9 Dark Down 22.4 352.0 Low 08:19:14 - 08:21:50 5327
Redmond 08:20:32 -68.7 Dark Down 22.6 352.1 Low 08:19:14 - 08:21:50 5322
Sisters 08:20:33 -68.7 Dark Down 22.7 351.9 Low 08:19:15 - 08:21:51 5312
PNWRO 08:20:26 -66.6 Dark Down 24.1 352.9 Low 08:19:08 - 08:21:44 5300
Maupin 08:20:31 -67.8 Dark Down 23.5 352.0 Low 08:19:13 - 08:21:49 5289
Pasco 08:20:27 -66.4 Dark Down 24.4 352.8 Low 08:19:09 - 08:21:45 5285
The Dalles 08:20:31 -67.4 Dark Down 23.9 352.0 Low 08:19:13 - 08:21:49 5270
Goldendale 08:20:30 -67.1 Dark Down 24.1 352.1 Low 08:19:12 - 08:21:48 5269
Toppenish/White Swan 08:20:29 -66.5 Dark Down 24.6 352.2 Low 08:19:11 - 08:21:47 5255
Yakima 08:20:29 -66.3 Dark Down 24.9 352.2 Low 08:19:11 - 08:21:47 5242
Ellensburg 08:20:29 -65.9 Dark Down 25.3 352.1 Low 08:19:11 - 08:21:47 5225
Wenatchee 08:20:28 -65.5 Dark Down 25.7 352.2 Low 08:19:10 - 08:21:46 5212
Entiat 08:20:28 -65.2 Dark Down 25.9 352.2 Low 08:19:10 - 08:21:46 5203
Manson/Chelan 08:20:27 -65.0 Dark Down 26.1 352.2 Low 08:19:09 - 08:21:45 5195
Brewster 08:20:26 -64.7 Dark Down 26.3 352.4 Low 08:19:08 - 08:21:44 5193
Okanogan 08:20:26 -64.4 Dark Down 26.5 352.4 Low 08:19:08 - 08:21:44 5184
Tonasket 08:20:25 -64.1 Dark Down 26.9 352.5 Low 08:19:07 - 08:21:43 5172
Anarchist Mountain Observatory 08:20:25 -63.8 Dark Down 27.2 352.5 Low 08:19:07 - 08:21:43 5159
Oliver 08:20:26 -63.6 Dark Down 27.3 352.4 Low 08:19:08 - 08:21:44 5147
Penticton 08:20:25 -63.3 Dark Down 27.7 352.4 Low 08:19:07 - 08:21:43 5131
Summerland 08:20:26 -63.2 Dark Down 27.8 352.3 Low 08:19:08 - 08:21:44 5126
Kelowna 08:20:25 -63.0 Dark Down 28.0 352.4 Low 08:19:07 - 08:21:43 5117
Peachland 08:20:25 -63.1 Dark Down 27.9 352.3 Low 08:19:07 - 08:21:43 5117
Clarence Fulton 08:20:25 -62.6 Dark Down 28.4 352.4 Low 08:19:07 - 08:21:43 5101
Victoria 08:20:33 -64.7 Dark Down 27.1 350.9 Low 08:19:15 - 08:21:51 5096

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 517717, (2020/12/16 08:20UT)
Object            RA         Dec     mag  sep  mel
Deneb          20:41:25.9 +45:16:49  1.3 24.84  73
Alderamin      21:18:35.2 +62:35:09  2.4 13.74  91
55 Dra         19:09:45.8 +65:58:43  6.3  1.50  91
PPM 021399     19:16:24.2 +67:08:06  8.0  0.28  92
517717         19:15:03.8 +67:23:12 14.3        92
Positions are for J2000

Event circumstances last updated at 2020/12/04 19:32:56 UT

Marc W. Buie, Southwest Research Institute

RECON