RECON: TNO occultation with 523597

Event between (523597) 02QX47 and star GA1080:00204642 with event index number of 363957

Geocentric closest approach at 2020/10/21 11:35:13 UTC

J2000 position of star is 01:56:32.2 +19:04:27
Equinox of date position of star is 01:57:34.3 +19:09:56
Stellar brightness G=15.0, use SENSEUP=128
Star is 121 degrees from the moon. Moon is 28% illuminated.
TNO apparent brightness V=22.8

[RECON map]
TNO is 25.7 AU from the Sun and 24.7 AU from the Earth.
The TNO is moving 24.4 km/sec on the sky relative to the star, or, 4.9 arcsec/hr.
The 1-sigma error in the time of the event is 101 seconds.
The 1-sigma cross-track error in the shadow position is 1370 km.
The sky-plane scale is 17947.8 km/arcsec.

The TNO has an absolute magnitude Hv=8.7
Diameter=109.7 km assuming a 5% albedo -- 4.5 sec chord
Diameter=44.8 km assuming a 30% albedo -- 1.8 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 

Star training set for 523597, (2020/10/21 11:35UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:37:07.0 +16:32:58  0.8 37.95 156
6Bet Ari       01:55:47.6 +20:54:32  2.6  1.79 121
15 Ari         02:11:47.0 +19:35:51  5.7  3.35 124
PPM 117832     01:59:30.0 +18:22:30  8.4  0.91 121
PPM 117799     01:57:37.9 +19:24:53  9.7  0.24 121
PPM 117812     01:58:18.1 +19:03:35 10.9  0.19 121
523597         01:57:40.9 +19:10:31 15.0       121
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 25.2 km RECON observability=1.0 and success probability=36.0%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Kelowna 11:32:10 -29.0 Dark Down 36.9 255.1 Up 11:23:17 - 11:41:03 744
Summerland 11:32:10 -29.2 Dark Down 37.1 254.8 Up 11:23:17 - 11:41:03 738
Penticton 11:32:09 -29.2 Dark Down 37.1 255.2 Up 11:23:16 - 11:41:02 706
Okanagan Falls 11:32:09 -29.3 Dark Down 37.1 255.4 Up 11:23:16 - 11:41:02 687
Oliver 11:32:09 -29.3 Dark Down 37.2 255.5 Up 11:23:16 - 11:41:02 670
Anarchist Mountain Observatory 11:32:08 -29.3 Dark Down 37.1 255.8 Up 11:23:15 - 11:41:01 653
Oroville 11:32:08 -29.3 Dark Down 37.2 255.8 Up 11:23:15 - 11:41:01 645
Tonasket 11:32:08 -29.4 Dark Down 37.2 256.0 Up 11:23:15 - 11:41:01 620
Okanogan 11:32:08 -29.6 Dark Down 37.4 256.1 Up 11:23:15 - 11:41:01 585
Brewster 11:32:08 -29.8 Dark Down 37.6 256.1 Up 11:23:15 - 11:41:01 556
Manson/Chelan 11:32:08 -30.1 Dark Down 37.9 255.9 Up 11:23:15 - 11:41:01 533
Entiat 11:32:08 -30.2 Dark Down 38.0 256.0 Up 11:23:15 - 11:41:01 510
Wenatchee 11:32:08 -30.4 Dark Down 38.1 256.2 Up 11:23:15 - 11:41:01 483
Ellensburg 11:32:08 -30.7 Dark Down 38.3 256.3 Up 11:23:15 - 11:41:01 439
Yakima 11:32:08 -30.8 Dark Down 38.4 256.6 Up 11:23:15 - 11:41:01 396
Toppenish/White Swan 11:32:07 -30.8 Dark Down 38.4 256.9 Up 11:23:14 - 11:41:00 374
Pasco 11:32:04 -30.0 Dark Down 37.6 258.0 Up 11:23:11 - 11:40:57 366
PNWRO 11:32:04 -29.9 Dark Down 37.5 258.4 Up 11:23:11 - 11:40:57 340
George/Umatilla 11:32:04 -30.2 Dark Down 37.8 258.1 Up 11:23:11 - 11:40:57 330
Goldendale 11:32:07 -31.2 Dark Down 38.8 257.0 Up 11:23:14 - 11:41:00 315
The Dalles 11:32:08 -31.5 Dark Down 39.1 256.8 Up 11:23:15 - 11:41:01 290
Maupin 11:32:07 -31.6 Dark Down 39.1 257.2 Up 11:23:14 - 11:41:00 246
Madras/Culver 11:32:06 -31.8 Dark Down 39.3 257.6 Up 11:23:13 - 11:40:59 188
Sisters 11:32:07 -32.2 Dark Down 39.7 257.5 Up 11:23:14 - 11:41:00 151
Redmond 11:32:06 -31.9 Dark Down 39.4 257.9 Up 11:23:13 - 11:40:59 149
Bend 11:32:06 -32.1 Dark Down 39.5 257.9 Up 11:23:13 - 11:40:59 126
Oregon Observatory 11:32:06 -32.2 Dark Down 39.7 258.0 Up 11:23:13 - 11:40:59 107
La Pine/Gilchrist 11:32:06 -32.3 Dark Down 39.7 258.1 Up 11:23:13 - 11:40:59 85
North Lake 11:32:04 -32.0 Dark Down 39.4 258.9 Up 11:23:11 - 11:40:57 40
Paisley 11:32:03 -31.9 Dark Down 39.3 259.7 Up 11:23:10 - 11:40:56 -18
Chiloquin 11:32:06 -32.9 Dark Down 40.2 258.7 Up 11:23:13 - 11:40:59 -35
Klamath Falls 11:32:05 -32.9 Dark Down 40.2 259.1 Up 11:23:12 - 11:40:58 -71
Lakeview 11:32:02 -31.9 Dark Down 39.2 260.2 Up 11:23:09 - 11:40:55 -71
Tulelake 11:32:04 -32.8 Dark Down 40.1 259.5 Up 11:23:11 - 11:40:57 -99
Cedarville 11:32:01 -32.0 Dark Down 39.2 260.9 Up 11:23:08 - 11:40:54 -142
Niwot 11:31:31 -21.1 Dark Down 28.0 272.0 Low 11:22:38 - 11:40:24 -168
Fall River/Burney 11:32:04 -33.0 Dark Down 40.2 260.3 Up 11:23:11 - 11:40:57 -197
Susanville 11:32:01 -32.6 Dark Down 39.7 261.4 Up 11:23:08 - 11:40:54 -263
Greenville 11:32:02 -32.9 Dark Down 40.0 261.4 Up 11:23:09 - 11:40:55 -294
Gimple 11:32:01 -32.8 Dark Down 39.9 261.5 Up 11:23:08 - 11:40:54 -294
Quincy 11:32:01 -32.9 Dark Down 40.0 261.6 Up 11:23:08 - 11:40:54 -316
Portola 11:32:00 -32.6 Dark Down 39.7 262.0 Up 11:23:07 - 11:40:53 -328
Reno 11:31:59 -32.2 Dark Down 39.2 262.7 Up 11:23:06 - 11:40:52 -355
Carson City 11:31:58 -32.3 Dark Down 39.2 263.0 Up 11:23:05 - 11:40:51 -394
Yerington 11:31:57 -31.8 Dark Down 38.8 263.6 Up 11:23:04 - 11:40:50 -413
Gardnerville 11:31:58 -32.3 Dark Down 39.2 263.3 Up 11:23:05 - 11:40:51 -420
Hawthorne 11:31:55 -31.5 Dark Down 38.4 264.4 Up 11:23:02 - 11:40:48 -461
Tonopah 11:31:52 -30.5 Dark Down 37.4 265.7 Up 11:22:59 - 11:40:45 -505
Lee Vining 11:31:56 -32.0 Dark Down 38.9 264.5 Up 11:23:03 - 11:40:49 -525
Bishop 11:31:54 -31.6 Dark Down 38.3 265.4 Up 11:23:01 - 11:40:47 -586
Beatty 11:31:50 -30.4 Dark Down 37.1 266.8 Up 11:22:57 - 11:40:43 -628
Indian Springs 11:31:47 -29.6 Dark Down 36.2 267.7 Up 11:22:54 - 11:40:40 -657
Lone Pine 11:31:53 -31.5 Dark Down 38.1 266.2 Up 11:23:00 - 11:40:46 -668
Henderson 11:31:45 -29.1 Dark Down 35.7 268.6 Up 11:22:52 - 11:40:38 -710
Patrick 11:31:42 -28.3 Dark Down 34.8 269.7 Up 11:22:49 - 11:40:35 -770
Searchlight/Boulder City 11:31:45 -29.1 Dark Down 35.7 269.0 Up 11:22:52 - 11:40:38 -773
Kingman/Dolan Springs 11:31:43 -28.5 Dark Down 35.0 269.7 Up 11:22:50 - 11:40:36 -796
DCO 11:31:41 -27.8 Dark Down 34.2 270.3 Up 11:22:48 - 11:40:34 -798
Laughlin/Bullhead City 11:31:44 -28.9 Dark Down 35.4 269.4 Up 11:22:51 - 11:40:37 -803
CPSLO 11:31:58 -33.7 Dark Down 40.3 265.7 Up 11:23:05 - 11:40:51 -821
Mohave Valley 11:31:44 -28.9 Dark Down 35.4 269.6 Up 11:22:51 - 11:40:37 -833
Lake Havasu City 11:31:43 -28.8 Dark Down 35.2 270.0 Up 11:22:50 - 11:40:36 -875
Parker 11:31:42 -28.8 Dark Down 35.2 270.3 Up 11:22:49 - 11:40:35 -913
Wildwood 11:31:52 -32.3 Dark Down 38.7 267.9 Up 11:22:59 - 11:40:45 -946
Blythe 11:31:43 -29.1 Dark Down 35.4 270.5 Up 11:22:50 - 11:40:36 -973
Idyllwild 11:31:48 -30.8 Dark Down 37.2 269.3 Up 11:22:55 - 11:40:41 -975
Calipatria 11:31:45 -29.9 Dark Down 36.2 270.4 Up 11:22:52 - 11:40:38 -1034
Yuma 11:31:42 -29.2 Dark Down 35.4 271.1 Up 11:22:49 - 11:40:35 -1075

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 523597, (2020/10/21 11:35UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:35:55.3 +16:30:30  0.8 37.95 156
6Bet Ari       01:54:38.5 +20:48:27  2.6  1.79 121
15 Ari         02:10:37.7 +19:30:01  5.7  3.35 124
PPM 117832     01:58:21.5 +18:16:27  8.4  0.91 121
PPM 117799     01:56:29.1 +19:18:49  9.7  0.24 121
PPM 117812     01:57:09.4 +18:57:32 10.9  0.19 121
523597         01:56:32.2 +19:04:27 15.0       121
Positions are for J2000

Event circumstances last updated at 2018/10/27 20:50:03 UT

Marc W. Buie, Southwest Research Institute

RECON