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 11:34:12 UTC

J2000 position of star is 01:56:32.2 +19:04:27
Equinox of date position of star is 01:57:36.3 +19:10:07
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 80 seconds.
The 1-sigma cross-track error in the shadow position is 1170 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 11:34UT)
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 24.6 km RECON observability=1.0 and success probability=32.3%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Kelowna 11:31:09 -29.2 Dark Down 37.0 254.9 Up 11:24:00 - 11:38:19 -340
Summerland 11:31:09 -29.4 Dark Down 37.3 254.9 Up 11:24:00 - 11:38:19 -371
Penticton 11:31:09 -29.4 Dark Down 37.2 255.0 Up 11:23:59 - 11:38:18 -378
Okanagan Falls 11:31:09 -29.5 Dark Down 37.3 255.1 Up 11:23:59 - 11:38:18 -397
Oliver 11:31:08 -29.5 Dark Down 37.3 255.3 Up 11:23:59 - 11:38:18 -414
Anarchist Mountain Observatory 11:31:08 -29.4 Dark Down 37.2 255.6 Up 11:23:58 - 11:38:17 -431
Oroville 11:31:08 -29.5 Dark Down 37.3 255.6 Up 11:23:58 - 11:38:17 -439
Tonasket 11:31:08 -29.6 Dark Down 37.4 255.7 Up 11:23:58 - 11:38:17 -464
Okanogan 11:31:07 -29.8 Dark Down 37.5 255.9 Up 11:23:58 - 11:38:17 -499
Brewster 11:31:07 -30.0 Dark Down 37.7 255.9 Up 11:23:58 - 11:38:17 -528
Manson/Chelan 11:31:08 -30.3 Dark Down 38.0 255.7 Up 11:23:58 - 11:38:17 -551
Entiat 11:31:08 -30.4 Dark Down 38.1 255.8 Up 11:23:58 - 11:38:17 -574
Wenatchee 11:31:08 -30.5 Dark Down 38.3 255.9 Up 11:23:58 - 11:38:17 -601
Ellensburg 11:31:08 -30.8 Dark Down 38.5 256.1 Up 11:23:58 - 11:38:17 -645
Yakima 11:31:07 -31.0 Dark Down 38.6 256.4 Up 11:23:58 - 11:38:17 -687
Toppenish/White Swan 11:31:07 -30.9 Dark Down 38.6 256.7 Up 11:23:57 - 11:38:16 -710
Pasco 11:31:04 -30.1 Dark Down 37.7 257.8 Up 11:23:54 - 11:38:13 -718
PNWRO 11:31:03 -30.0 Dark Down 37.6 258.2 Up 11:23:53 - 11:38:12 -744
George/Umatilla 11:31:04 -30.4 Dark Down 38.0 257.9 Up 11:23:54 - 11:38:13 -754
Goldendale 11:31:07 -31.4 Dark Down 39.0 256.7 Up 11:23:57 - 11:38:16 -769
The Dalles 11:31:07 -31.7 Dark Down 39.3 256.6 Up 11:23:58 - 11:38:17 -794
Maupin 11:31:07 -31.7 Dark Down 39.3 257.0 Up 11:23:57 - 11:38:16 -838
Madras/Culver 11:31:06 -31.9 Dark Down 39.4 257.4 Up 11:23:57 - 11:38:16 -896
Sisters 11:31:06 -32.3 Dark Down 39.8 257.3 Up 11:23:57 - 11:38:16 -933
Redmond 11:31:06 -32.1 Dark Down 39.6 257.7 Up 11:23:56 - 11:38:15 -934
Bend 11:31:06 -32.2 Dark Down 39.7 257.7 Up 11:23:56 - 11:38:15 -957
Oregon Observatory 11:31:06 -32.4 Dark Down 39.8 257.8 Up 11:23:56 - 11:38:15 -976
La Pine/Gilchrist 11:31:06 -32.5 Dark Down 39.9 257.9 Up 11:23:56 - 11:38:15 -998
North Lake 11:31:04 -32.2 Dark Down 39.6 258.7 Up 11:23:55 - 11:38:14 -1043
Paisley 11:31:03 -32.1 Dark Down 39.4 259.5 Up 11:23:53 - 11:38:12 -1101
Chiloquin 11:31:06 -33.1 Dark Down 40.4 258.5 Up 11:23:56 - 11:38:15 -1118
Klamath Falls 11:31:05 -33.1 Dark Down 40.4 258.9 Up 11:23:56 - 11:38:15 -1155
Lakeview 11:31:02 -32.1 Dark Down 39.4 260.0 Up 11:23:52 - 11:38:11 -1155
Tulelake 11:31:04 -33.0 Dark Down 40.2 259.3 Up 11:23:55 - 11:38:14 -1183
Cedarville 11:31:01 -32.2 Dark Down 39.4 260.7 Up 11:23:51 - 11:38:10 -1226
Niwot 11:30:31 -21.3 Dark Down 28.2 271.9 Low 11:23:22 - 11:37:41 -1254
SwRI 11:30:31 -21.3 Dark Down 28.3 271.9 Low 11:23:22 - 11:37:41 -1267
Fall River/Burney 11:31:03 -33.2 Dark Down 40.4 260.1 Up 11:23:54 - 11:38:13 -1281
Susanville 11:31:01 -32.8 Dark Down 39.9 261.2 Up 11:23:52 - 11:38:11 -1347
Gimple 11:31:01 -33.0 Dark Down 40.1 261.3 Up 11:23:52 - 11:38:11 -1378
Greenville 11:31:02 -33.1 Dark Down 40.2 261.2 Up 11:23:52 - 11:38:11 -1378
Quincy 11:31:01 -33.1 Dark Down 40.2 261.4 Up 11:23:52 - 11:38:11 -1400
Portola 11:31:00 -32.8 Dark Down 39.9 261.9 Up 11:23:51 - 11:38:10 -1412
Reno 11:30:59 -32.4 Dark Down 39.4 262.5 Up 11:23:49 - 11:38:08 -1439
Carson City 11:30:58 -32.4 Dark Down 39.4 262.9 Up 11:23:48 - 11:38:07 -1478
Yerington 11:30:56 -32.0 Dark Down 39.0 263.5 Up 11:23:47 - 11:38:06 -1497
Gardnerville 11:30:58 -32.5 Dark Down 39.4 263.1 Up 11:23:48 - 11:38:07 -1504
Hawthorne 11:30:55 -31.7 Dark Down 38.6 264.2 Up 11:23:45 - 11:38:04 -1545
Tonopah 11:30:51 -30.7 Dark Down 37.6 265.5 Up 11:23:42 - 11:38:01 -1589
Lee Vining 11:30:56 -32.2 Dark Down 39.0 264.3 Up 11:23:46 - 11:38:05 -1609
Bishop 11:30:53 -31.8 Dark Down 38.5 265.3 Up 11:23:44 - 11:38:03 -1671
Beatty 11:30:49 -30.6 Dark Down 37.3 266.7 Up 11:23:40 - 11:37:59 -1713
Indian Springs 11:30:47 -29.8 Dark Down 36.4 267.6 Up 11:23:37 - 11:37:56 -1742
Lone Pine 11:30:52 -31.7 Dark Down 38.3 266.1 Up 11:23:42 - 11:38:01 -1752
Henderson 11:30:45 -29.3 Dark Down 35.9 268.4 Up 11:23:35 - 11:37:54 -1795
Patrick 11:30:42 -28.5 Dark Down 35.0 269.5 Up 11:23:33 - 11:37:52 -1856
Searchlight/Boulder City 11:30:44 -29.3 Dark Down 35.9 268.9 Up 11:23:35 - 11:37:54 -1858
Kingman/Dolan Springs 11:30:42 -28.7 Dark Down 35.2 269.6 Up 11:23:33 - 11:37:52 -1881
DCO 11:30:40 -28.0 Dark Down 34.4 270.1 Up 11:23:31 - 11:37:50 -1883
Laughlin/Bullhead City 11:30:44 -29.1 Dark Down 35.6 269.3 Up 11:23:34 - 11:37:53 -1888
CPSLO 11:30:57 -33.9 Dark Down 40.5 265.5 Up 11:23:48 - 11:38:07 -1905
Mohave Valley 11:30:43 -29.1 Dark Down 35.6 269.5 Up 11:23:34 - 11:37:53 -1918
Lake Havasu City 11:30:42 -29.0 Dark Down 35.4 269.9 Up 11:23:33 - 11:37:52 -1960
Parker 11:30:42 -29.0 Dark Down 35.4 270.2 Up 11:23:33 - 11:37:52 -1998
Wildwood 11:30:52 -32.5 Dark Down 38.9 267.8 Up 11:23:42 - 11:38:01 -2030
Blythe 11:30:43 -29.3 Dark Down 35.6 270.4 Up 11:23:33 - 11:37:52 -2058
Idyllwild 11:30:47 -31.0 Dark Down 37.4 269.1 Up 11:23:38 - 11:37:57 -2060
Calipatria 11:30:44 -30.1 Dark Down 36.4 270.2 Up 11:23:35 - 11:37:54 -2119
Yuma 11:30:42 -29.4 Dark Down 35.6 271.0 Up 11:23:33 - 11:37:52 -2160

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 11:34UT)
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 2019/06/01 22:13:21 UT

Marc W. Buie, Southwest Research Institute

RECON