RECON: TNO occultation with 523624

Event between (523624) 08CT190 and star UC4-643-049446 with event index number of 325996

Geocentric closest approach at 2020/01/23 12:40:17 UTC

J2000 position of star is 12:02:53.7 +38:29:22
Equinox of date position of star is 12:03:53.1 +38:22:53
Stellar brightness R=15.6, use SENSEUP=128
Star is 118 degrees from the moon. Moon is 2% illuminated.
TNO apparent brightness V=21.4

[RECON map]
TNO is 35.1 AU from the Sun and 34.4 AU from the Earth.
The TNO is moving 21.9 km/sec on the sky relative to the star, or, 3.2 arcsec/hr.
The 1-sigma error in the time of the event is 92 seconds.
The 1-sigma cross-track error in the shadow position is 2619 km.
The sky-plane scale is 24971.1 km/arcsec.

The TNO has an absolute magnitude Hv=5.8
Diameter=416.9 km assuming a 5% albedo -- 19.0 sec chord
Diameter=170.2 km assuming a 30% albedo -- 7.8 sec chord
Dynamical classification is 7:3EEEE
 
 
 
 
 
 

Star training set for 523624, (2020/01/23 12:40UT)
Object            RA         Dec     mag  sep  mel
Arcturus       14:16:34.7 +19:04:45  0.0 34.60  84
Phad           11:54:52.6 +53:34:59  2.4 15.28 120
PPM 076134     11:54:07.6 +37:34:32  6.4  2.09 119
PPM 076307     12:10:28.5 +38:31:11  7.3  1.29 116
PPM 076265     12:06:25.0 +38:32:43  8.9  0.52 117
PPM 076218     12:02:22.4 +38:13:52 11.5  0.34 118
523624         12:03:55.0 +38:22:40 15.6       117
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 5.6 km RECON observability=1.0 and success probability=1.2%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Niwot 12:39:51 -18.5 Dark Down 69.6 274.0 Up 12:31:41 - 12:48:01 9102
SwRI 12:39:51 -18.5 Dark Down 69.6 274.2 Up 12:31:41 - 12:48:01 9092
DCO 12:39:31 -24.0 Dark Down 75.0 288.4 Up 12:31:21 - 12:47:41 8330
Patrick 12:39:35 -24.6 Dark Down 75.6 287.6 Up 12:31:25 - 12:47:45 8278
Kelowna 12:40:52 -28.9 Dark Down 75.6 222.5 Up 12:32:42 - 12:49:02 8261
Kingman/Dolan Springs 12:39:31 -24.8 Dark Down 75.7 288.5 Up 12:31:21 - 12:47:41 8255
Penticton 12:40:48 -29.1 Dark Down 75.9 223.0 Up 12:32:38 - 12:48:58 8239
Anarchist Mountain Observatory 12:40:46 -29.0 Dark Down 76.2 225.0 Up 12:32:36 - 12:48:56 8237
Summerland 12:40:49 -29.1 Dark Down 75.9 222.5 Up 12:32:39 - 12:48:59 8233
Okanagan Falls 12:40:48 -29.1 Dark Down 76.1 223.5 Up 12:32:38 - 12:48:58 8232
Oroville 12:40:46 -29.0 Dark Down 76.3 225.0 Up 12:32:36 - 12:48:56 8229
Oliver 12:40:47 -29.1 Dark Down 76.2 224.0 Up 12:32:37 - 12:48:57 8228
Tonasket 12:40:44 -29.0 Dark Down 76.5 225.7 Up 12:32:34 - 12:48:54 8223
Lake Havasu City 12:39:30 -24.9 Dark Down 75.7 291.2 Up 12:31:20 - 12:47:40 8212
Laughlin/Bullhead City 12:39:33 -25.2 Dark Down 76.1 288.8 Up 12:31:23 - 12:47:43 8210
Parker 12:39:29 -24.8 Dark Down 75.5 292.4 Up 12:31:19 - 12:47:39 8205
Okanogan 12:40:43 -29.2 Dark Down 76.8 226.2 Up 12:32:33 - 12:48:53 8203
Mohave Valley 12:39:32 -25.1 Dark Down 76.0 289.8 Up 12:31:22 - 12:47:42 8203
Henderson 12:39:38 -25.6 Dark Down 76.6 285.5 Up 12:31:28 - 12:47:48 8200
Searchlight/Boulder City 12:39:35 -25.5 Dark Down 76.4 287.8 Up 12:31:25 - 12:47:45 8189
PNWRO 12:40:31 -28.8 Dark Down 77.9 236.1 Up 12:32:21 - 12:48:41 8182
Brewster 12:40:42 -29.3 Dark Down 77.1 226.5 Up 12:32:32 - 12:48:52 8180
Pasco 12:40:32 -29.0 Dark Down 77.9 234.6 Up 12:32:22 - 12:48:42 8173
Blythe 12:39:26 -25.0 Dark Down 75.5 294.5 Up 12:31:16 - 12:47:36 8163
Indian Springs 12:39:42 -26.2 Dark Down 77.3 283.5 Up 12:31:32 - 12:47:52 8157
Manson/Chelan 12:40:41 -29.6 Dark Down 77.4 226.2 Up 12:32:31 - 12:48:51 8148
George/Umatilla 12:40:31 -29.1 Dark Down 78.2 235.3 Up 12:32:21 - 12:48:41 8147
Entiat 12:40:40 -29.6 Dark Down 77.6 226.7 Up 12:32:30 - 12:48:50 8136
Yuma 12:39:21 -24.9 Dark Down 75.2 297.7 Up 12:31:11 - 12:47:31 8132
Wenatchee 12:40:39 -29.7 Dark Down 77.8 227.2 Up 12:32:29 - 12:48:49 8121
Ellensburg 12:40:37 -29.9 Dark Down 78.2 228.0 Up 12:32:27 - 12:48:47 8093
Toppenish/White Swan 12:40:34 -29.8 Dark Down 78.5 230.7 Up 12:32:24 - 12:48:44 8084
Yakima 12:40:36 -29.9 Dark Down 78.5 229.4 Up 12:32:26 - 12:48:46 8079
Beatty 12:39:43 -27.1 Dark Down 78.2 282.2 Up 12:31:33 - 12:47:53 8076
Tonopah 12:39:50 -27.5 Dark Down 78.7 276.6 Up 12:31:40 - 12:48:00 8073
Calipatria 12:39:25 -25.7 Dark Down 76.0 297.1 Up 12:31:15 - 12:47:35 8066
Goldendale 12:40:32 -30.2 Dark Down 79.1 231.6 Up 12:32:22 - 12:48:42 8036
The Dalles 12:40:32 -30.4 Dark Down 79.4 231.4 Up 12:32:22 - 12:48:42 8002
Maupin 12:40:29 -30.4 Dark Down 79.6 233.5 Up 12:32:19 - 12:48:39 7996
Idyllwild 12:39:29 -26.8 Dark Down 77.2 296.0 Up 12:31:19 - 12:47:39 7981
Madras/Culver 12:40:27 -30.4 Dark Down 80.0 235.8 Up 12:32:17 - 12:48:37 7975
Hawthorne 12:39:54 -28.6 Dark Down 79.9 273.8 Up 12:31:44 - 12:48:04 7971
Redmond 12:40:25 -30.5 Dark Down 80.2 237.4 Up 12:32:15 - 12:48:35 7959
Lone Pine 12:39:44 -28.1 Dark Down 79.2 284.1 Up 12:31:34 - 12:47:54 7957
Paisley 12:40:17 -30.1 Dark Down 80.6 247.3 Up 12:32:07 - 12:48:27 7955
Bishop 12:39:48 -28.4 Dark Down 79.6 280.2 Up 12:31:38 - 12:47:58 7953
Lakeview 12:40:14 -30.0 Dark Down 80.6 250.5 Up 12:32:04 - 12:48:24 7953
North Lake 12:40:20 -30.3 Dark Down 80.6 243.4 Up 12:32:10 - 12:48:30 7945
Cedarville 12:40:11 -29.8 Dark Down 80.7 254.7 Up 12:32:01 - 12:48:21 7945
Yerington 12:39:56 -29.1 Dark Down 80.3 270.9 Up 12:31:46 - 12:48:06 7943
Bend 12:40:24 -30.6 Dark Down 80.4 238.0 Up 12:32:14 - 12:48:34 7941
Sisters 12:40:25 -30.8 Dark Down 80.4 236.1 Up 12:32:15 - 12:48:35 7929
Oregon Observatory 12:40:24 -30.7 Dark Down 80.6 238.5 Up 12:32:14 - 12:48:34 7925
La Pine/Gilchrist 12:40:23 -30.8 Dark Down 80.7 239.4 Up 12:32:13 - 12:48:33 7914
Lee Vining 12:39:52 -29.0 Dark Down 80.2 276.9 Up 12:31:42 - 12:48:02 7912
Reno 12:40:01 -29.6 Dark Down 80.8 267.2 Up 12:31:51 - 12:48:11 7908
Carson City 12:39:59 -29.5 Dark Down 80.8 269.4 Up 12:31:49 - 12:48:09 7897
Gardnerville 12:39:57 -29.5 Dark Down 80.8 270.9 Up 12:31:47 - 12:48:07 7893
Susanville 12:40:06 -30.2 Dark Down 81.3 260.7 Up 12:31:56 - 12:48:16 7870
Portola 12:40:03 -30.1 Dark Down 81.3 264.9 Up 12:31:53 - 12:48:13 7864
Tulelake 12:40:14 -30.8 Dark Down 81.5 249.3 Up 12:32:04 - 12:48:24 7857
Chiloquin 12:40:17 -31.1 Dark Down 81.5 244.6 Up 12:32:07 - 12:48:27 7848
Gimple 12:40:04 -30.4 Dark Down 81.5 262.2 Up 12:31:54 - 12:48:14 7843
Klamath Falls 12:40:15 -31.0 Dark Down 81.6 246.9 Up 12:32:05 - 12:48:25 7843
Greenville 12:40:04 -30.4 Dark Down 81.6 262.1 Up 12:31:54 - 12:48:14 7837
Fall River/Burney 12:40:10 -30.8 Dark Down 81.7 255.3 Up 12:32:00 - 12:48:20 7832
Quincy 12:40:04 -30.4 Dark Down 81.6 263.5 Up 12:31:54 - 12:48:14 7830
Wildwood 12:39:33 -28.4 Dark Down 78.7 296.7 Up 12:31:23 - 12:47:43 7828
CPSLO 12:39:41 -30.1 Dark Down 80.8 293.3 Up 12:31:31 - 12:47:51 7691

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 523624, (2020/01/23 12:40UT)
Object            RA         Dec     mag  sep  mel
Arcturus       14:15:38.2 +19:10:18  0.0 34.60  84
Phad           11:53:50.0 +53:41:41  2.4 15.28 120
PPM 076134     11:53:05.3 +37:41:14  6.4  2.09 119
PPM 076307     12:09:27.7 +38:37:53  7.3  1.29 116
PPM 076265     12:05:23.8 +38:39:25  8.9  0.52 117
PPM 076218     12:01:20.9 +38:20:34 11.5  0.34 118
523624         12:02:53.7 +38:29:22 15.6       118
Positions are for J2000

Event circumstances last updated at 2019/06/07 23:12:10 UT

Marc W. Buie, Southwest Research Institute

RECON