RECON: TNO occultation with 99CC119

Event between 99CC119 and star UC4-424-057059 with event index number of 332623

Geocentric closest approach at 2020/04/11 04:18:21 UTC

J2000 position of star is 12:50:27.8 -05:22:46
Equinox of date position of star is 12:51:27.0 -05:28:59
Stellar brightness R=12.6, use SENSEUP=16
Star is 51 degrees from the moon. Moon is 87% illuminated.
TNO apparent brightness V=23.5

[RECON map]
TNO is 43.0 AU from the Sun and 42.0 AU from the Earth.
The TNO is moving 24.9 km/sec on the sky relative to the star, or, 2.9 arcsec/hr.
The 1-sigma error in the time of the event is 391 seconds.
The 1-sigma cross-track error in the shadow position is 5895 km.
The sky-plane scale is 30482.3 km/arcsec.

The TNO has an absolute magnitude Hv=7.2
Diameter=221.8 km assuming a 5% albedo -- 8.9 sec chord
Diameter=90.6 km assuming a 30% albedo -- 3.6 sec chord
Dynamical classification is CLASSICAL
 
 
 
 
 
 

Star training set for 99CC119, (2020/04/11 04:18UT)
Object            RA         Dec     mag  sep  mel
Spica          13:26:15.9 -11:16:00  1.0 10.35  41
PPM 195939     12:54:41.0 -04:20:05  6.5  1.40  51
PPM 195901     12:52:43.4 -06:14:35  8.4  0.81  50
PPM 195886     12:51:42.0 -05:39:20  9.5  0.17  51
99CC119        12:51:30.8 -05:29:23 12.6        51
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 2.3 sigma about the mid-time.
The median site spacing is 20.3 km RECON observability=1.0 and success probability=5.9%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Kelowna 04:21:32 -15.0 AT Down 21.6 128.7 Low 04:06:32 - 04:36:32 2940
Summerland 04:21:33 -14.9 AT Down 21.4 128.4 Low 04:06:33 - 04:36:33 2928
Penticton 04:21:33 -15.2 AT Down 21.7 128.5 Low 04:06:33 - 04:36:33 2905
Okanagan Falls 04:21:34 -15.2 AT Down 21.8 128.4 Low 04:06:34 - 04:36:34 2888
Oliver 04:21:34 -15.4 AT Down 21.9 128.4 Low 04:06:34 - 04:36:34 2875
Anarchist Mountain Observatory 04:21:33 -15.6 AT Down 22.1 128.5 Low 04:06:33 - 04:36:33 2865
Oroville 04:21:34 -15.6 AT Down 22.1 128.4 Low 04:06:34 - 04:36:34 2857
Tonasket 04:21:33 -15.7 AT Down 22.3 128.3 Low 04:06:33 - 04:36:33 2837
Okanogan 04:21:35 -15.8 AT Down 22.4 128.1 Low 04:06:35 - 04:36:35 2804
Brewster 04:21:36 -15.8 AT Down 22.5 127.8 Low 04:06:36 - 04:36:36 2776
Manson/Chelan 04:21:36 -15.7 AT Down 22.4 127.4 Low 04:06:36 - 04:36:36 2749
Entiat 04:21:36 -15.8 AT Down 22.5 127.3 Low 04:06:36 - 04:36:36 2728
Wenatchee 04:21:37 -15.9 AT Down 22.6 127.1 Low 04:06:37 - 04:36:37 2703
Ellensburg 04:21:38 -16.0 AT Down 22.7 126.8 Low 04:06:38 - 04:36:38 2661
Pasco 04:21:36 -17.2 AT Down 24.0 127.8 Low 04:06:36 - 04:36:36 2631
Yakima 04:21:38 -16.2 AT Down 23.0 126.6 Low 04:06:38 - 04:36:38 2625
PNWRO 04:21:36 -17.5 AT Down 24.3 127.9 Low 04:06:36 - 04:36:36 2615
Toppenish/White Swan 04:21:38 -16.4 AT Down 23.2 126.7 Low 04:06:38 - 04:36:38 2610
George/Umatilla 04:21:37 -17.3 AT Down 24.1 127.5 Low 04:06:37 - 04:36:37 2596
Goldendale 04:21:40 -16.5 AT Down 23.3 126.1 Low 04:06:40 - 04:36:40 2550
The Dalles 04:21:41 -16.4 AT Down 23.2 125.7 Low 04:06:41 - 04:36:41 2521
Niwot 04:21:09 -28.9 Dark Down 35.5 138.7 Up 04:06:09 - 04:36:09 2489
Maupin 04:21:41 -16.6 AT Down 23.5 125.7 Low 04:06:41 - 04:36:41 2486
SwRI 04:21:09 -28.9 Dark Down 35.5 138.6 Up 04:06:09 - 04:36:09 2477
Madras/Culver 04:21:42 -16.9 AT Down 23.8 125.4 Low 04:06:42 - 04:36:42 2435
Redmond 04:21:41 -17.0 AT Down 24.0 125.3 Low 04:06:41 - 04:36:41 2401
Sisters 04:21:43 -16.8 AT Down 23.8 124.9 Low 04:06:43 - 04:36:43 2393
Bend 04:21:42 -17.1 AT Down 24.0 125.1 Low 04:06:42 - 04:36:42 2378
Oregon Observatory 04:21:43 -17.1 AT Down 24.1 124.9 Low 04:06:43 - 04:36:43 2359
La Pine/Gilchrist 04:21:43 -17.1 AT Down 24.2 124.8 Low 04:06:43 - 04:36:43 2339
North Lake 04:21:42 -17.7 AT Down 24.8 125.1 Low 04:06:42 - 04:36:42 2314
Paisley 04:21:43 -18.3 Dark Down 25.3 125.2 Low 04:06:43 - 04:36:43 2273
Lakeview 04:21:42 -18.6 Dark Down 25.7 125.2 Low 04:06:42 - 04:36:42 2231
Chiloquin 04:21:45 -17.5 AT Down 24.6 124.0 Low 04:06:45 - 04:36:45 2227
Klamath Falls 04:21:45 -17.7 AT Down 24.8 124.0 Low 04:06:45 - 04:36:45 2197
Tulelake 04:21:45 -18.0 Dark Down 25.1 124.1 Low 04:06:45 - 04:36:45 2180
Cedarville 04:21:42 -19.1 Dark Down 26.2 125.1 Low 04:06:42 - 04:36:42 2175
Fall River/Burney 04:21:45 -18.6 Dark Down 25.7 123.9 Low 04:06:45 - 04:36:45 2097
Susanville 04:21:45 -19.4 Dark Down 26.5 124.2 Low 04:06:45 - 04:36:45 2058
Gimple 04:21:45 -19.4 Dark Down 26.5 123.9 Low 04:06:45 - 04:36:45 2026
Greenville 04:21:45 -19.3 Dark Down 26.5 123.9 Low 04:06:45 - 04:36:45 2024
Portola 04:21:44 -19.8 Dark Down 27.0 124.1 Low 04:06:44 - 04:36:44 2006
Quincy 04:21:45 -19.4 Dark Down 26.6 123.8 Low 04:06:45 - 04:36:45 2005
Reno 04:21:43 -20.3 Dark Down 27.5 124.6 Low 04:06:43 - 04:36:43 1999
Carson City 04:21:43 -20.5 Dark Down 27.8 124.5 Low 04:06:43 - 04:36:43 1966
Yerington 04:21:43 -21.1 Dark Down 28.3 124.9 Low 04:06:43 - 04:36:43 1965
Gardnerville 04:21:44 -20.7 Dark Down 27.9 124.4 Low 04:06:44 - 04:36:44 1944
Hawthorne 04:21:42 -21.7 Dark Down 28.9 125.2 Low 04:06:42 - 04:36:42 1936
Tonopah 04:21:39 -22.8 Dark Down 30.0 126.2 Up 04:06:39 - 04:36:39 1933
Lee Vining 04:21:43 -21.6 Dark Down 28.9 124.5 Low 04:06:43 - 04:36:43 1868
Indian Springs 04:21:35 -24.7 Dark Down 31.9 126.8 Up 04:06:35 - 04:36:35 1838
Beatty 04:21:38 -23.8 Dark Down 31.0 126.0 Up 04:06:38 - 04:36:38 1837
Bishop 04:21:42 -22.4 Dark Down 29.7 124.8 Low 04:06:42 - 04:36:42 1832
Henderson 04:21:34 -25.4 Dark Down 32.7 127.2 Up 04:06:34 - 04:36:34 1809
Patrick 04:21:32 -26.5 Dark Down 33.8 127.9 Up 04:06:32 - 04:36:32 1784
DCO 04:21:30 -27.2 Dark Down 34.4 128.3 Up 04:06:30 - 04:36:30 1777
Lone Pine 04:21:42 -23.0 Dark Down 30.3 124.8 Up 04:06:42 - 04:36:42 1769
Kingman/Dolan Springs 04:21:33 -26.5 Dark Down 33.8 127.6 Up 04:06:33 - 04:36:33 1757
Searchlight/Boulder City 04:21:34 -25.8 Dark Down 33.1 126.9 Up 04:06:34 - 04:36:34 1756
Laughlin/Bullhead City 04:21:34 -26.2 Dark Down 33.5 127.1 Up 04:06:34 - 04:36:34 1738
Mohave Valley 04:21:34 -26.3 Dark Down 33.6 127.0 Up 04:06:34 - 04:36:34 1712
Lake Havasu City 04:21:34 -26.7 Dark Down 34.0 127.0 Up 04:06:34 - 04:36:34 1682
Parker 04:21:33 -26.9 Dark Down 34.3 126.8 Up 04:06:33 - 04:36:33 1649
Blythe 04:21:34 -27.0 Dark Down 34.4 126.2 Up 04:06:34 - 04:36:34 1589
CPSLO 04:21:47 -21.9 Dark Down 29.3 122.0 Low 04:06:47 - 04:36:47 1567
Idyllwild 04:21:39 -25.4 Dark Down 32.9 124.5 Up 04:06:39 - 04:36:39 1533
Calipatria 04:21:36 -26.6 Dark Down 34.0 125.2 Up 04:06:36 - 04:36:36 1511
Wildwood 04:21:43 -23.9 Dark Down 31.4 123.1 Up 04:06:43 - 04:36:43 1510
Yuma 04:21:34 -27.5 Dark Down 34.9 125.7 Up 04:06:34 - 04:36:34 1498

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 99CC119, (2020/04/11 04:18UT)
Object            RA         Dec     mag  sep  mel
Spica          13:25:11.5 -11:09:41  1.0 10.35  41
PPM 195939     12:53:38.1 -04:13:30  6.5  1.40  51
PPM 195901     12:51:40.4 -06:07:59  8.4  0.81  50
PPM 195886     12:50:39.1 -05:32:43  9.5  0.17  51
99CC119        12:50:27.8 -05:22:46 12.6        51
Positions are for J2000

Event circumstances last updated at 2019/01/29 03:48:28 UT

Marc W. Buie, Southwest Research Institute

RECON