RECON: TNO occultation with 495613

Event between (495613) 15FG345 and star GA0920:03914576 with event index number of 1167483

Geocentric closest approach at 2021/04/11 04:54:03 UTC

J2000 position of star is 14:32:14.0 +03:05:37
Equinox of date position of star is 14:33:17.8 +03:00:05
Stellar brightness G=15.8, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 154 degrees from the moon. Moon is 1% illuminated.
TNO apparent brightness V=21.3

[RECON map]
TNO is 40.0 AU from the Sun and 39.0 AU from the Earth.
The TNO is moving 24.8 km/sec on the sky relative to the star, or, 3.1 arcsec/hr.
The 1-sigma error in the time of the event is 64 seconds.
The 1-sigma cross-track error in the shadow position is 1637 km.
The sky-plane scale is 28322.1 km/arcsec.

The TNO has an absolute magnitude Hv=5.3
Diameter=515.2 km assuming a 5% albedo -- 20.8 sec chord
Diameter=210.3 km assuming a 30% albedo -- 8.5 sec chord
Dynamical classification is SCATEXTD
 
 
 
 
 
 

Star training set for 495613, (2021/04/11 04:54UT)
Object            RA         Dec     mag  sep  mel
Arcturus       14:16:38.0 +19:04:21  0.0 16.58 151
27Bet Lib      15:18:09.3 -09:27:36  2.6 16.74 142
PPM 160711     14:31:49.4 +04:40:43  6.0  1.72 154
PPM 160745     14:34:02.0 +03:34:00  7.8  0.59 154
PPM 160739     14:33:37.0 +03:02:34  9.2  0.09 154
495613         14:33:18.5 +03:00:02 15.8       154
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 31.5 km RECON observability=0.6 and success probability=13.5%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Clarence Fulton 04:57:24 -19.5 Dark Down 19.1 109.1 Really Low 04:51:34 - 05:03:13 -1359
Kelowna 04:57:24 -19.7 Dark Down 19.2 108.9 Really Low 04:51:35 - 05:03:14 -1397
Peachland 04:57:25 -19.6 Dark Down 19.0 108.6 Really Low 04:51:35 - 05:03:14 -1409
Summerland 04:57:25 -19.7 Dark Down 19.1 108.6 Really Low 04:51:36 - 05:03:15 -1423
Penticton 04:57:25 -19.8 Dark Down 19.2 108.7 Really Low 04:51:36 - 05:03:15 -1428
Oliver 04:57:26 -20.1 Dark Down 19.3 108.6 Really Low 04:51:36 - 05:03:15 -1461
Anarchist Mountain Observatory 04:57:26 -20.3 Dark Down 19.5 108.7 Really Low 04:51:37 - 05:03:16 -1476
Tonasket 04:57:27 -20.4 Dark Down 19.6 108.5 Really Low 04:51:37 - 05:03:16 -1506
Okanogan 04:57:27 -20.6 Dark Down 19.6 108.3 Really Low 04:51:38 - 05:03:17 -1539
Victoria 04:57:32 -18.5 Dark Down 17.1 105.2 Really Low 04:51:42 - 05:03:21 -1547
Brewster 04:57:28 -20.7 Dark Down 19.5 108.0 Really Low 04:51:39 - 05:03:18 -1566
Manson/Chelan 04:57:29 -20.6 Dark Down 19.4 107.7 Really Low 04:51:40 - 05:03:19 -1588
Wenatchee 04:57:30 -20.8 Dark Down 19.4 107.4 Really Low 04:51:41 - 05:03:20 -1635
Ellensburg 04:57:31 -21.0 Dark Down 19.4 107.0 Really Low 04:51:42 - 05:03:21 -1676
Yakima 04:57:32 -21.2 Dark Down 19.5 106.9 Really Low 04:51:42 - 05:03:21 -1716
Toppenish/White Swan 04:57:32 -21.5 Dark Down 19.7 107.0 Really Low 04:51:43 - 05:03:22 -1736
Pasco 04:57:31 -22.2 Dark Down 20.5 107.9 Low 04:51:41 - 05:03:20 -1739
PNWRO 04:57:31 -22.5 Dark Down 20.8 108.0 Low 04:51:42 - 05:03:21 -1761
Goldendale 04:57:34 -21.6 Dark Down 19.5 106.4 Really Low 04:51:44 - 05:03:23 -1792
The Dalles 04:57:35 -21.6 Dark Down 19.4 106.1 Really Low 04:51:45 - 05:03:24 -1817
Maupin 04:57:35 -21.9 Dark Down 19.5 106.0 Really Low 04:51:46 - 05:03:25 -1857
Redmond 04:57:37 -22.4 Dark Down 19.7 105.6 Really Low 04:51:48 - 05:03:27 -1947
Sisters 04:57:37 -22.2 Dark Down 19.5 105.3 Really Low 04:51:48 - 05:03:27 -1947
Bend 04:57:38 -22.4 Dark Down 19.7 105.5 Really Low 04:51:48 - 05:03:27 -1969
Oregon Observatory 04:57:38 -22.5 Dark Down 19.7 105.3 Really Low 04:51:48 - 05:03:27 -1987
La Pine/Gilchrist 04:57:38 -22.6 Dark Down 19.7 105.2 Really Low 04:51:49 - 05:03:28 -2008
North Lake 04:57:38 -23.2 Dark Down 20.2 105.5 Low 04:51:49 - 05:03:28 -2047
Paisley 04:57:39 -23.7 Dark Down 20.6 105.6 Low 04:51:49 - 05:03:28 -2100
Lakeview 04:57:39 -24.2 Dark Down 20.9 105.5 Low 04:51:49 - 05:03:28 -2149
Klamath Falls 04:57:41 -23.3 Dark Down 19.9 104.5 Really Low 04:51:52 - 05:03:31 -2155
Dunrhomin 04:57:15 -33.5 Dark Down 32.1 116.7 Up 04:51:25 - 05:03:04 -2182
Cedarville 04:57:40 -24.7 Dark Down 21.2 105.4 Low 04:51:50 - 05:03:29 -2214
Fall River/Burney 04:57:42 -24.3 Dark Down 20.4 104.4 Low 04:51:53 - 05:03:32 -2272
Susanville 04:57:42 -25.1 Dark Down 21.1 104.7 Low 04:51:53 - 05:03:32 -2331
Gimple 04:57:43 -25.1 Dark Down 21.0 104.4 Low 04:51:54 - 05:03:33 -2361
Greenville 04:57:43 -25.1 Dark Down 21.0 104.3 Low 04:51:54 - 05:03:33 -2361
Quincy 04:57:43 -25.2 Dark Down 21.0 104.3 Low 04:51:54 - 05:03:33 -2382
Portola 04:57:43 -25.6 Dark Down 21.4 104.6 Low 04:51:53 - 05:03:32 -2391
Reno 04:57:42 -26.1 Dark Down 22.0 104.9 Low 04:51:53 - 05:03:32 -2413
Carson City 04:57:42 -26.4 Dark Down 22.1 104.8 Low 04:51:53 - 05:03:32 -2450
Yerington 04:57:42 -26.9 Dark Down 22.6 105.2 Low 04:51:53 - 05:03:32 -2465
Gardnerville 04:57:43 -26.5 Dark Down 22.2 104.7 Low 04:51:54 - 05:03:33 -2475
Hawthorne 04:57:42 -27.5 Dark Down 23.1 105.4 Low 04:51:52 - 05:03:31 -2509
Tonopah 04:57:40 -28.6 Dark Down 24.3 106.2 Low 04:51:51 - 05:03:30 -2544
Lee Vining 04:57:43 -27.5 Dark Down 22.9 104.8 Low 04:51:54 - 05:03:33 -2571
Bishop 04:57:43 -28.3 Dark Down 23.6 105.1 Low 04:51:53 - 05:03:32 -2627
Beatty 04:57:40 -29.6 Dark Down 25.0 106.0 Low 04:51:51 - 05:03:30 -2660
Indian Springs 04:57:39 -30.5 Dark Down 25.9 106.6 Low 04:51:50 - 05:03:29 -2684
Henderson 04:57:38 -31.3 Dark Down 26.6 106.8 Low 04:51:49 - 05:03:28 -2732
Patrick 04:57:37 -32.4 Dark Down 27.6 107.3 Low 04:51:48 - 05:03:27 -2786
Kingman/Dolan Springs 04:57:37 -32.4 Dark Down 27.6 107.1 Low 04:51:48 - 05:03:27 -2811
Laughlin/Bullhead City 04:57:39 -32.1 Dark Down 27.2 106.7 Low 04:51:49 - 05:03:28 -2819
Mohave Valley 04:57:39 -32.3 Dark Down 27.3 106.6 Low 04:51:49 - 05:03:28 -2848
CPSLO 04:57:48 -28.1 Dark Down 22.4 102.7 Low 04:51:59 - 05:03:38 -2861
Lake Havasu City 04:57:39 -32.7 Dark Down 27.6 106.5 Low 04:51:49 - 05:03:28 -2887
Parker 04:57:39 -33.0 Dark Down 27.7 106.4 Low 04:51:50 - 05:03:29 -2924
George/Scottsdale 04:57:34 -34.7 Dark Down 29.7 107.8 Low 04:51:45 - 05:03:24 -2940
Wildwood 04:57:47 -30.2 Dark Down 24.3 103.5 Low 04:51:57 - 05:03:36 -2972
Blythe 04:57:40 -33.1 Dark Down 27.6 105.9 Low 04:51:50 - 05:03:29 -2982
Idyllwild 04:57:44 -31.7 Dark Down 25.9 104.6 Low 04:51:54 - 05:03:33 -2992
Calipatria 04:57:42 -32.8 Dark Down 27.0 105.1 Low 04:51:53 - 05:03:32 -3044
Yuma 04:57:41 -33.7 Dark Down 27.8 105.4 Low 04:51:51 - 05:03:30 -3081

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 495613, (2021/04/11 04:54UT)
Object            RA         Dec     mag  sep  mel
Arcturus       14:15:38.1 +19:10:15  0.0 16.58 151
27Bet Lib      15:17:00.3 -09:22:59  2.6 16.74 142
PPM 160711     14:30:45.4 +04:46:20  6.0  1.72 154
PPM 160745     14:32:57.7 +03:39:34  7.8  0.59 154
PPM 160739     14:32:32.6 +03:08:09  9.2  0.09 154
495613         14:32:14.0 +03:05:37 15.8       154
Positions are for J2000

Event circumstances last updated at 2021/01/20 20:08:03 UT

Marc W. Buie, Southwest Research Institute

RECON