RECON: TNO occultation with 523742

Event between (523742) 14TZ85 and star UC4-604-042758 with event index number of 305951

Geocentric closest approach at 2020/02/12 09:14:14 UTC

J2000 position of star is 08:01:39.9 +30:39:06
Equinox of date position of star is 08:02:50.6 +30:35:54
Stellar brightness R=16.3, use SENSEUP=128
Star is 69 degrees from the moon. Moon is 87% illuminated.
TNO apparent brightness V=22.2

[RECON map]
TNO is 54.1 AU from the Sun and 53.3 AU from the Earth.
The TNO is moving 23.9 km/sec on the sky relative to the star, or, 2.2 arcsec/hr.
The 1-sigma error in the time of the event is 134 seconds.
The 1-sigma cross-track error in the shadow position is 2271 km.
The sky-plane scale is 38621.7 km/arcsec.

The TNO has an absolute magnitude Hv=4.8
Diameter=660.7 km assuming a 5% albedo -- 27.7 sec chord
Diameter=269.7 km assuming a 30% albedo -- 11.3 sec chord
Dynamical classification is 7:4EII
 
 
 
 
 
 

Star training set for 523742, (2020/02/12 09:14UT)
Object            RA         Dec     mag  sep  mel
Pollux         07:46:32.7 +27:58:34  1.1  4.43  72
15 Cnc         08:14:23.5 +29:35:41  5.6  2.67  67
PPM 098143     07:57:30.8 +29:47:51  8.1  1.42  70
PPM 073356     08:02:58.1 +31:06:55  9.7  0.52  69
PPM 073344     08:02:22.2 +30:11:59 10.5  0.41  69
523742         08:02:55.5 +30:35:41 16.3        69
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 17.7 km RECON observability=1.0 and success probability=9.6%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Kelowna 09:12:32 -51.8 Dark Up 54.4 252.6 Up 09:00:55 - 09:24:10 -2942
Summerland 09:12:33 -52.0 Dark Up 54.6 252.3 Up 09:00:55 - 09:24:10 -2956
Penticton 09:12:32 -52.2 Dark Up 54.6 252.9 Up 09:00:55 - 09:24:10 -2979
Okanagan Falls 09:12:32 -52.4 Dark Up 54.7 253.2 Up 09:00:54 - 09:24:09 -2997
Oliver 09:12:31 -52.5 Dark Up 54.7 253.4 Up 09:00:54 - 09:24:09 -3012
Anarchist Mountain Observatory 09:12:30 -52.6 Dark Up 54.6 253.8 Up 09:00:53 - 09:24:08 -3022
Oroville 09:12:30 -52.7 Dark Up 54.7 253.8 Up 09:00:53 - 09:24:08 -3031
Tonasket 09:12:29 -52.9 Dark Up 54.8 254.2 Up 09:00:52 - 09:24:07 -3052
Okanogan 09:12:29 -53.3 Dark Up 55.0 254.5 Up 09:00:52 - 09:24:07 -3087
Brewster 09:12:29 -53.6 Dark Up 55.2 254.6 Up 09:00:51 - 09:24:06 -3118
Manson/Chelan 09:12:29 -53.9 Dark Up 55.5 254.6 Up 09:00:52 - 09:24:07 -3147
Entiat 09:12:29 -54.1 Dark Up 55.6 254.8 Up 09:00:51 - 09:24:06 -3170
Wenatchee 09:12:28 -54.4 Dark Up 55.7 255.1 Up 09:00:51 - 09:24:06 -3196
Ellensburg 09:12:28 -54.8 Dark Up 55.9 255.4 Up 09:00:51 - 09:24:06 -3241
Pasco 09:12:23 -55.1 Dark Up 55.2 257.8 Up 09:00:45 - 09:24:00 -3269
Yakima 09:12:27 -55.2 Dark Up 56.1 256.0 Up 09:00:50 - 09:24:05 -3279
PNWRO 09:12:21 -55.2 Dark Up 55.1 258.4 Up 09:00:44 - 09:23:59 -3285
Toppenish/White Swan 09:12:26 -55.3 Dark Up 56.0 256.5 Up 09:00:48 - 09:24:03 -3295
George/Umatilla 09:12:22 -55.4 Dark Up 55.4 258.1 Up 09:00:45 - 09:24:00 -3306
Niwot 09:11:37 -53.3 Dark Up 45.5 275.4 Up 08:59:59 - 09:23:14 -3351
Goldendale 09:12:26 -56.0 Dark Up 56.4 256.9 Up 09:00:48 - 09:24:03 -3359
The Dalles 09:12:26 -56.3 Dark Up 56.7 256.8 Up 09:00:49 - 09:24:04 -3391
Maupin 09:12:25 -56.6 Dark Up 56.7 257.6 Up 09:00:47 - 09:24:02 -3428
Madras/Culver 09:12:24 -57.1 Dark Up 56.9 258.3 Up 09:00:47 - 09:24:02 -3481
Redmond 09:12:23 -57.5 Dark Up 57.0 258.8 Up 09:00:46 - 09:24:01 -3517
Sisters 09:12:25 -57.6 Dark Up 57.3 258.4 Up 09:00:47 - 09:24:02 -3526
Bend 09:12:23 -57.7 Dark Up 57.1 259.0 Up 09:00:46 - 09:24:01 -3541
Oregon Observatory 09:12:23 -57.9 Dark Up 57.3 259.2 Up 09:00:46 - 09:24:01 -3562
La Pine/Gilchrist 09:12:23 -58.1 Dark Up 57.3 259.4 Up 09:00:45 - 09:24:00 -3583
North Lake 09:12:20 -58.3 Dark Up 57.0 260.6 Up 09:00:43 - 09:23:58 -3607
Paisley 09:12:18 -58.7 Dark Up 56.8 261.7 Up 09:00:40 - 09:23:55 -3649
Lakeview 09:12:16 -59.1 Dark Up 56.8 262.7 Up 09:00:39 - 09:23:54 -3692
Chiloquin 09:12:21 -59.2 Dark Up 57.8 260.8 Up 09:00:44 - 09:23:59 -3701
Klamath Falls 09:12:20 -59.5 Dark Up 57.8 261.4 Up 09:00:43 - 09:23:58 -3732
Tulelake 09:12:18 -59.7 Dark Up 57.6 262.1 Up 09:00:41 - 09:23:56 -3749
Cedarville 09:12:14 -59.6 Dark Up 56.7 263.8 Up 09:00:37 - 09:23:52 -3750
Fall River/Burney 09:12:17 -60.5 Dark Up 57.7 263.6 Up 09:00:39 - 09:23:54 -3835
Susanville 09:12:13 -60.8 Dark Up 57.2 265.1 Up 09:00:36 - 09:23:51 -3873
Gimple 09:12:13 -61.1 Dark Up 57.4 265.4 Up 09:00:36 - 09:23:51 -3907
Greenville 09:12:14 -61.1 Dark Up 57.4 265.3 Up 09:00:36 - 09:23:51 -3910
Portola 09:12:11 -61.2 Dark Up 57.1 266.2 Up 09:00:34 - 09:23:49 -3926
Quincy 09:12:13 -61.3 Dark Up 57.4 265.7 Up 09:00:36 - 09:23:51 -3929
Reno 09:12:09 -61.2 Dark Up 56.6 267.1 Up 09:00:31 - 09:23:46 -3931
Yerington 09:12:06 -61.4 Dark Up 56.1 268.3 Up 09:00:29 - 09:23:44 -3963
Carson City 09:12:08 -61.5 Dark Up 56.6 267.6 Up 09:00:31 - 09:23:46 -3965
Gardnerville 09:12:07 -61.7 Dark Up 56.6 268.0 Up 09:00:30 - 09:23:45 -3988
Tonopah 09:11:59 -61.3 Dark Up 54.6 270.9 Up 09:00:22 - 09:23:37 -3988
Hawthorne 09:12:04 -61.6 Dark Up 55.7 269.3 Up 09:00:26 - 09:23:41 -3991
Lee Vining 09:12:04 -62.3 Dark Up 56.1 269.9 Up 09:00:26 - 09:23:41 -4063
Indian Springs 09:11:52 -61.7 Dark Up 53.4 273.8 Up 09:00:14 - 09:23:29 -4078
Beatty 09:11:55 -62.0 Dark Up 54.3 272.8 Up 09:00:18 - 09:23:33 -4085
Bishop 09:12:00 -62.4 Dark Up 55.6 271.2 Up 09:00:23 - 09:23:38 -4097
Henderson 09:11:49 -61.8 Dark Up 52.8 274.8 Up 09:00:11 - 09:23:26 -4105
Patrick 09:11:45 -61.6 Dark Up 51.8 276.2 Up 09:00:07 - 09:23:22 -4124
DCO 09:11:43 -61.4 Dark Up 51.2 276.9 Up 09:00:05 - 09:23:20 -4127
Kingman/Dolan Springs 09:11:45 -61.9 Dark Up 52.0 276.4 Up 09:00:07 - 09:23:22 -4153
Searchlight/Boulder City 09:11:47 -62.1 Dark Up 52.7 275.6 Up 09:00:10 - 09:23:25 -4158
Lone Pine 09:11:58 -62.9 Dark Up 55.3 272.5 Up 09:00:20 - 09:23:35 -4160
Laughlin/Bullhead City 09:11:46 -62.2 Dark Up 52.4 276.2 Up 09:00:09 - 09:23:24 -4174
Mohave Valley 09:11:45 -62.4 Dark Up 52.4 276.5 Up 09:00:08 - 09:23:23 -4201
Lake Havasu City 09:11:44 -62.5 Dark Up 52.1 277.1 Up 09:00:06 - 09:23:21 -4231
Parker 09:11:43 -62.7 Dark Up 52.0 277.6 Up 09:00:05 - 09:23:20 -4264
Blythe 09:11:43 -63.3 Dark Up 52.2 278.1 Up 09:00:05 - 09:23:20 -4327
CPSLO 09:12:03 -65.2 Dark Up 57.3 273.0 Up 09:00:25 - 09:23:40 -4379
Idyllwild 09:11:49 -64.4 Dark Up 54.0 277.1 Up 09:00:11 - 09:23:26 -4395
Calipatria 09:11:44 -64.2 Dark Up 52.9 278.4 Up 09:00:07 - 09:23:22 -4411
Yuma 09:11:41 -63.9 Dark Up 52.1 279.3 Up 09:00:03 - 09:23:18 -4419
Wildwood 09:11:55 -65.2 Dark Up 55.5 275.8 Up 09:00:17 - 09:23:32 -4428

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 523742, (2020/02/12 09:14UT)
Object            RA         Dec     mag  sep  mel
Pollux         07:45:18.1 +28:01:33  1.1  4.43  72
15 Cnc         08:13:08.9 +29:39:23  5.6  2.67  67
PPM 098143     07:56:15.5 +29:51:08  8.1  1.42  70
PPM 073356     08:01:42.3 +31:10:20  9.7  0.52  69
PPM 073344     08:01:06.8 +30:15:24 10.5  0.41  69
523742         08:01:39.9 +30:39:06 16.3        69
Positions are for J2000

Event circumstances last updated at 2018/10/26 20:43:40 UT

Marc W. Buie, Southwest Research Institute

RECON