RECON: TNO occultation with 517717

Event between (517717) 15KZ120 and star GA1460:05615254 with event index number of 267523

Geocentric closest approach at 2020/02/25 13:17:28 UTC

J2000 position of star is 19:04:06.7 +57:12:54
Equinox of date position of star is 19:04:28.3 +57:14:44
Stellar brightness G=16.8, use SENSEUP=128
Star is 86 degrees from the moon. Moon is 3% illuminated.
TNO apparent brightness V=19.9

[RECON map]
TNO is 8.6 AU from the Sun and 8.7 AU from the Earth.
The TNO is moving 43.5 km/sec on the sky relative to the star, or, 24.8 arcsec/hr.
The 1-sigma error in the time of the event is 11 seconds.
The 1-sigma cross-track error in the shadow position is 431 km.
The sky-plane scale is 6326.0 km/arcsec.

The TNO has an absolute magnitude Hv=10.0
Diameter=60.3 km assuming a 5% albedo -- 1.4 sec chord
Diameter=24.6 km assuming a 30% albedo -- 0.6 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 

Star training set for 517717, (2020/02/25 13:17UT)
Object            RA         Dec     mag  sep  mel
Vega           18:37:37.3 +38:48:12  0.0 18.96  86
Etamin         17:57:04.5 +51:29:14  2.2 11.34  95
53 Dra         19:12:03.4 +56:53:39  5.1  1.09  85
PPM 037041     19:03:19.1 +56:38:44  8.4  0.62  86
PPM 037073     19:05:25.4 +57:09:27  9.3  0.16  86
517717         19:04:28.5 +57:14:46 16.8        86
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 4.1 km RECON observability=0.7 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)
Victoria 13:16:51 -18.4 Dark Down 56.5 53.8 Up 13:15:27 - 13:18:15 4950
Klamath Falls 13:16:35 -17.9 AT Down 53.3 47.0 Up 13:15:11 - 13:17:59 4860
Sisters 13:16:40 -17.6 AT Down 54.8 49.1 Up 13:15:16 - 13:18:04 4844
La Pine/Gilchrist 13:16:39 -17.6 AT Down 54.4 48.5 Up 13:15:15 - 13:18:03 4840
Oregon Observatory 13:16:39 -17.5 AT Down 54.6 48.7 Up 13:15:15 - 13:18:03 4836
Fall River/Burney 13:16:33 -17.7 AT Down 52.7 45.8 Up 13:15:09 - 13:17:57 4830
Bend 13:16:39 -17.4 AT Down 54.8 48.9 Up 13:15:15 - 13:18:03 4826
Redmond 13:16:40 -17.3 AT Down 55.0 49.1 Up 13:15:16 - 13:18:04 4816
The Dalles 13:16:43 -17.2 AT Down 55.9 50.6 Up 13:15:19 - 13:18:07 4815
Maupin 13:16:42 -17.2 AT Down 55.7 50.1 Up 13:15:18 - 13:18:06 4808
North Lake 13:16:37 -17.2 AT Down 54.5 48.0 Up 13:15:13 - 13:18:01 4797
Greenville 13:16:30 -17.4 AT Down 52.3 45.0 Up 13:15:06 - 13:17:54 4795
Quincy 13:16:30 -17.4 AT Down 52.2 44.8 Up 13:15:06 - 13:17:54 4794
Goldendale 13:16:43 -16.9 AT Down 56.2 50.9 Up 13:15:19 - 13:18:07 4790
Gimple 13:16:30 -17.3 AT Down 52.3 45.0 Up 13:15:06 - 13:17:54 4788
Susanville 13:16:31 -17.2 AT Down 52.7 45.2 Up 13:15:07 - 13:17:55 4773
Yakima 13:16:45 -16.7 AT Down 56.8 51.8 Up 13:15:21 - 13:18:09 4771
Paisley 13:16:36 -17.0 AT Down 54.3 47.4 Up 13:15:12 - 13:18:00 4770
Ellensburg 13:16:46 -16.7 AT Down 57.1 52.3 Up 13:15:22 - 13:18:10 4769
Toppenish/White Swan 13:16:45 -16.6 AT Down 56.8 51.5 Up 13:15:21 - 13:18:09 4759
Portola 13:16:29 -17.1 AT Down 52.3 44.7 Up 13:15:05 - 13:17:53 4757
Lakeview 13:16:35 -16.8 AT Down 54.1 46.9 Up 13:15:11 - 13:17:59 4755
Wenatchee 13:16:47 -16.5 AT Down 57.5 52.8 Up 13:15:23 - 13:18:11 4753
Entiat 13:16:47 -16.4 AT Down 57.7 53.1 Up 13:15:23 - 13:18:11 4745
CPSLO 13:16:19 -17.4 AT Down 48.9 41.0 Up 13:14:55 - 13:17:43 4745
Cedarville 13:16:33 -16.8 AT Down 53.7 46.3 Up 13:15:09 - 13:17:57 4741
Manson/Chelan 13:16:48 -16.3 AT Down 57.9 53.4 Up 13:15:24 - 13:18:12 4740
Brewster 13:16:48 -16.1 AT Down 58.2 53.7 Up 13:15:24 - 13:18:12 4715
Reno 13:16:29 -16.6 AT Down 52.5 44.4 Up 13:15:05 - 13:17:53 4706
Summerland 13:16:52 -15.8 AT Down 59.1 55.8 Up 13:15:28 - 13:18:16 4703
Carson City 13:16:27 -16.6 AT Down 52.2 44.0 Up 13:15:03 - 13:17:51 4703
Okanogan 13:16:49 -15.9 AT Down 58.4 54.1 Up 13:15:25 - 13:18:13 4701
Gardnerville 13:16:27 -16.5 AT Down 52.1 43.8 Up 13:15:03 - 13:17:51 4698
Oliver 13:16:51 -15.8 AT Down 58.9 55.2 Up 13:15:27 - 13:18:15 4697
Penticton 13:16:52 -15.8 AT Down 59.1 55.7 Up 13:15:28 - 13:18:16 4696
Tonasket 13:16:50 -15.8 AT Down 58.7 54.6 Up 13:15:26 - 13:18:14 4690
Kelowna 13:16:53 -15.7 AT Down 59.4 56.2 Up 13:15:29 - 13:18:17 4690
Anarchist Mountain Observatory 13:16:51 -15.7 AT Down 58.9 55.0 Up 13:15:27 - 13:18:15 4685
Clarence Fulton 13:16:54 -15.6 AT Down 59.7 56.7 Up 13:15:30 - 13:18:18 4678
Pasco 13:16:44 -15.7 AT Down 57.4 51.5 Up 13:15:20 - 13:18:08 4672
PNWRO 13:16:43 -15.6 AT Down 57.4 51.2 Up 13:15:19 - 13:18:07 4656
Yerington 13:16:27 -16.1 AT Down 52.4 43.8 Up 13:15:03 - 13:17:51 4652
Lee Vining 13:16:25 -16.1 AT Down 51.7 42.9 Up 13:15:01 - 13:17:49 4643
Hawthorne 13:16:26 -15.7 AT Down 52.4 43.3 Up 13:15:02 - 13:17:50 4608
Bishop 13:16:23 -15.5 AT Down 51.7 42.3 Up 13:14:59 - 13:17:47 4580
Wildwood 13:16:16 -15.7 AT Down 49.1 39.7 Up 13:14:52 - 13:17:40 4566
Tonopah 13:16:24 -14.6 AT Down 52.8 42.7 Up 13:15:00 - 13:17:48 4493
Beatty 13:16:22 -14.2 AT Down 52.2 41.7 Up 13:14:58 - 13:17:46 4445
Idyllwild 13:16:15 -14.1 AT Down 49.8 39.1 Up 13:14:51 - 13:17:39 4404
Indian Springs 13:16:21 -13.3 AT Down 52.5 41.2 Up 13:14:57 - 13:17:45 4353
Calipatria 13:16:13 -13.1 AT Down 49.9 38.4 Up 13:14:49 - 13:17:37 4295
Henderson 13:16:20 -12.8 AT Down 52.5 40.6 Up 13:14:56 - 13:17:44 4290
Searchlight/Boulder City 13:16:18 -12.7 AT Down 52.1 40.1 Up 13:14:54 - 13:17:42 4277
Laughlin/Bullhead City 13:16:17 -12.4 AT Down 52.0 39.8 Up 13:14:53 - 13:17:41 4244
Mohave Valley 13:16:17 -12.4 AT Down 51.8 39.5 Up 13:14:53 - 13:17:41 4240
Blythe 13:16:14 -12.4 AT Down 50.8 38.5 Up 13:14:50 - 13:17:38 4223
Lake Havasu City 13:16:16 -12.2 AT Down 51.6 39.2 Up 13:14:52 - 13:17:40 4213
Yuma 13:16:12 -12.3 AT Down 50.0 37.9 Up 13:14:48 - 13:17:36 4212
Parker 13:16:15 -12.1 AT Down 51.4 38.9 Up 13:14:51 - 13:17:39 4205
Kingman/Dolan Springs 13:16:17 -12.0 NT Down 52.3 39.7 Up 13:14:53 - 13:17:41 4201
Patrick 13:16:18 -11.8 NT Down 52.6 39.8 Up 13:14:54 - 13:17:42 4188
DCO 13:16:17 -11.2 NT Down 52.7 39.4 Up 13:14:53 - 13:17:41 4124
George/Scottsdale 13:16:14 -10.1 NT Down 52.3 37.9 Up 13:14:50 - 13:17:38 3991
SwRI 13:16:28 -5.4 CT Down 60.5 41.8 Up 13:15:04 - 13:17:52 3563
Niwot 13:16:28 -5.4 CT Down 60.6 41.9 Up 13:15:04 - 13:17:52 3558

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, (2020/02/25 13:17UT)
Object            RA         Dec     mag  sep  mel
Vega           18:36:56.7 +38:47:07  0.0 18.96  86
Etamin         17:56:36.3 +51:29:20  2.2 11.34  95
53 Dra         19:11:40.6 +56:51:34  5.1  1.09  85
PPM 037041     19:02:56.5 +56:36:55  8.4  0.62  86
PPM 037073     19:05:03.4 +57:07:33  9.3  0.16  86
517717         19:04:06.7 +57:12:54 16.8        86
Positions are for J2000

Event circumstances last updated at 2019/11/26 22:21:14 UT

Marc W. Buie, Southwest Research Institute

RECON