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 11:34:34 UTC

J2000 position of star is 01:56:32.2 +19:04:27
Equinox of date position of star is 01:57:35.1 +19:10:00
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 55 seconds.
The 1-sigma cross-track error in the shadow position is 996 km.
The sky-plane scale is 17947.9 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=32.4%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Kelowna 11:31:31 -29.1 Dark Down 37.0 255.0 Up 11:26:26 - 11:36:36 -433
Summerland 11:31:32 -29.3 Dark Down 37.2 254.7 Up 11:26:27 - 11:36:37 -439
Penticton 11:31:31 -29.3 Dark Down 37.2 255.1 Up 11:26:26 - 11:36:36 -471
Okanagan Falls 11:31:30 -29.4 Dark Down 37.2 255.2 Up 11:26:25 - 11:36:35 -490
Oliver 11:31:30 -29.4 Dark Down 37.3 255.4 Up 11:26:25 - 11:36:35 -507
Anarchist Mountain Observatory 11:31:30 -29.4 Dark Down 37.2 255.7 Up 11:26:25 - 11:36:35 -524
Oroville 11:31:30 -29.4 Dark Down 37.3 255.6 Up 11:26:25 - 11:36:35 -532
Tonasket 11:31:29 -29.5 Dark Down 37.3 255.8 Up 11:26:24 - 11:36:34 -557
Okanogan 11:31:29 -29.7 Dark Down 37.5 255.9 Up 11:26:24 - 11:36:34 -592
Brewster 11:31:29 -29.9 Dark Down 37.7 256.0 Up 11:26:24 - 11:36:34 -621
Manson/Chelan 11:31:30 -30.2 Dark Down 38.0 255.8 Up 11:26:25 - 11:36:35 -644
Entiat 11:31:30 -30.3 Dark Down 38.1 255.9 Up 11:26:25 - 11:36:35 -667
Wenatchee 11:31:29 -30.5 Dark Down 38.2 256.0 Up 11:26:24 - 11:36:34 -694
Ellensburg 11:31:29 -30.8 Dark Down 38.4 256.1 Up 11:26:24 - 11:36:34 -738
Yakima 11:31:29 -30.9 Dark Down 38.6 256.4 Up 11:26:24 - 11:36:34 -781
Toppenish/White Swan 11:31:28 -30.9 Dark Down 38.5 256.7 Up 11:26:23 - 11:36:33 -803
Pasco 11:31:26 -30.1 Dark Down 37.7 257.9 Up 11:26:21 - 11:36:31 -811
PNWRO 11:31:25 -30.0 Dark Down 37.6 258.3 Up 11:26:20 - 11:36:30 -837
George/Umatilla 11:31:26 -30.3 Dark Down 37.9 258.0 Up 11:26:21 - 11:36:31 -848
Goldendale 11:31:28 -31.3 Dark Down 38.9 256.8 Up 11:26:23 - 11:36:33 -862
The Dalles 11:31:29 -31.6 Dark Down 39.2 256.7 Up 11:26:24 - 11:36:34 -887
Maupin 11:31:28 -31.7 Dark Down 39.2 257.1 Up 11:26:23 - 11:36:33 -931
Madras/Culver 11:31:28 -31.9 Dark Down 39.4 257.5 Up 11:26:23 - 11:36:33 -989
Sisters 11:31:29 -32.3 Dark Down 39.8 257.4 Up 11:26:24 - 11:36:34 -1026
Redmond 11:31:28 -32.0 Dark Down 39.5 257.8 Up 11:26:23 - 11:36:33 -1027
Bend 11:31:28 -32.2 Dark Down 39.6 257.8 Up 11:26:23 - 11:36:33 -1051
Oregon Observatory 11:31:28 -32.3 Dark Down 39.8 257.8 Up 11:26:23 - 11:36:33 -1069
La Pine/Gilchrist 11:31:28 -32.4 Dark Down 39.9 258.0 Up 11:26:23 - 11:36:33 -1091
North Lake 11:31:26 -32.1 Dark Down 39.5 258.8 Up 11:26:21 - 11:36:31 -1136
Paisley 11:31:25 -32.0 Dark Down 39.4 259.5 Up 11:26:20 - 11:36:30 -1194
Chiloquin 11:31:27 -33.0 Dark Down 40.3 258.6 Up 11:26:22 - 11:36:32 -1211
Klamath Falls 11:31:27 -33.0 Dark Down 40.3 258.9 Up 11:26:22 - 11:36:32 -1248
Lakeview 11:31:24 -32.0 Dark Down 39.3 260.1 Up 11:26:19 - 11:36:29 -1248
Tulelake 11:31:26 -32.9 Dark Down 40.2 259.4 Up 11:26:21 - 11:36:31 -1276
Cedarville 11:31:23 -32.1 Dark Down 39.3 260.7 Up 11:26:18 - 11:36:28 -1319
Niwot 11:30:53 -21.2 Dark Down 28.2 271.9 Low 11:25:48 - 11:35:58 -1346
Fall River/Burney 11:31:25 -33.1 Dark Down 40.3 260.2 Up 11:26:20 - 11:36:30 -1374
Susanville 11:31:23 -32.7 Dark Down 39.8 261.3 Up 11:26:18 - 11:36:28 -1440
Gimple 11:31:23 -32.9 Dark Down 40.0 261.4 Up 11:26:18 - 11:36:28 -1471
Greenville 11:31:23 -33.0 Dark Down 40.1 261.3 Up 11:26:18 - 11:36:28 -1471
Quincy 11:31:23 -33.1 Dark Down 40.1 261.5 Up 11:26:18 - 11:36:28 -1493
Portola 11:31:22 -32.7 Dark Down 39.8 261.9 Up 11:26:17 - 11:36:27 -1505
Reno 11:31:20 -32.3 Dark Down 39.3 262.6 Up 11:26:15 - 11:36:25 -1532
Carson City 11:31:20 -32.4 Dark Down 39.4 262.9 Up 11:26:15 - 11:36:25 -1571
Yerington 11:31:18 -31.9 Dark Down 38.9 263.5 Up 11:26:13 - 11:36:23 -1590
Gardnerville 11:31:20 -32.4 Dark Down 39.4 263.1 Up 11:26:15 - 11:36:25 -1597
Hawthorne 11:31:17 -31.6 Dark Down 38.5 264.2 Up 11:26:12 - 11:36:22 -1638
Tonopah 11:31:13 -30.7 Dark Down 37.5 265.6 Up 11:26:08 - 11:36:18 -1682
Lee Vining 11:31:17 -32.1 Dark Down 39.0 264.4 Up 11:26:12 - 11:36:22 -1702
Bishop 11:31:15 -31.7 Dark Down 38.5 265.3 Up 11:26:10 - 11:36:20 -1764
Beatty 11:31:11 -30.5 Dark Down 37.2 266.7 Up 11:26:06 - 11:36:16 -1806
Indian Springs 11:31:09 -29.7 Dark Down 36.4 267.6 Up 11:26:04 - 11:36:14 -1834
Lone Pine 11:31:14 -31.6 Dark Down 38.3 266.1 Up 11:26:09 - 11:36:19 -1845
Henderson 11:31:07 -29.2 Dark Down 35.8 268.5 Up 11:26:02 - 11:36:12 -1888
Patrick 11:31:04 -28.4 Dark Down 34.9 269.6 Up 11:25:59 - 11:36:09 -1948
Searchlight/Boulder City 11:31:06 -29.3 Dark Down 35.8 268.9 Up 11:26:01 - 11:36:11 -1950
Kingman/Dolan Springs 11:31:04 -28.6 Dark Down 35.1 269.6 Up 11:25:59 - 11:36:09 -1974
DCO 11:31:02 -27.9 Dark Down 34.4 270.2 Up 11:25:57 - 11:36:07 -1976
Laughlin/Bullhead City 11:31:05 -29.0 Dark Down 35.5 269.3 Up 11:26:00 - 11:36:10 -1980
CPSLO 11:31:19 -33.9 Dark Down 40.4 265.6 Up 11:26:14 - 11:36:24 -1998
Mohave Valley 11:31:05 -29.1 Dark Down 35.5 269.5 Up 11:26:00 - 11:36:10 -2010
Lake Havasu City 11:31:04 -28.9 Dark Down 35.3 269.9 Up 11:25:59 - 11:36:09 -2052
Parker 11:31:04 -28.9 Dark Down 35.3 270.2 Up 11:25:59 - 11:36:09 -2091
Wildwood 11:31:14 -32.4 Dark Down 38.8 267.8 Up 11:26:09 - 11:36:19 -2123
Blythe 11:31:04 -29.2 Dark Down 35.5 270.4 Up 11:25:59 - 11:36:09 -2151
Idyllwild 11:31:09 -31.0 Dark Down 37.3 269.2 Up 11:26:04 - 11:36:14 -2153
Calipatria 11:31:06 -30.1 Dark Down 36.3 270.3 Up 11:26:01 - 11:36:11 -2212
Yuma 11:31:04 -29.4 Dark Down 35.6 271.1 Up 11:25:59 - 11:36:09 -2253

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 2019/01/18 19:58:54 UT

Marc W. Buie, Southwest Research Institute

RECON