RECON: TNO occultation with 523700

Event between (523700) 14GM54 and star GA1100:10469161 with event index number of 1134579

Geocentric closest approach at 2021/09/09 07:08:00 UTC

J2000 position of star is 19:37:16.7 +20:04:11
Equinox of date position of star is 19:38:07.8 +20:06:52
Stellar brightness G=15.8, use SENSEUP=128
Star is 98 degrees from the moon. Moon is 7% illuminated.
TNO apparent brightness V=21.6

[RECON map]
TNO is 27.4 AU from the Sun and 26.9 AU from the Earth.
The TNO is moving 23.7 km/sec on the sky relative to the star, or, 4.4 arcsec/hr.
The 1-sigma error in the time of the event is 73 seconds.
The 1-sigma cross-track error in the shadow position is 2292 km.
The sky-plane scale is 19513.3 km/arcsec.

The TNO has an absolute magnitude Hv=7.1
Diameter=229.1 km assuming a 5% albedo -- 9.7 sec chord
Diameter=93.5 km assuming a 30% albedo -- 3.9 sec chord
Dynamical classification is 3:2E+6:4II
 
 
 
 
 
 

Star training set for 523700, (2021/09/09 07:08UT)
Object            RA         Dec     mag  sep  mel
Vega           18:37:40.4 +38:48:17  0.0 22.79  86
Tarazed        19:47:17.4 +10:40:03  2.7  9.70 100
9 Vul          19:35:32.1 +19:49:19  4.7  0.70  98
PPM 109337     19:37:34.6 +20:22:57  8.1  0.30  98
PPM 109350     19:38:01.9 +20:20:11  9.9  0.22  98
PPM 136647     19:38:50.3 +20:01:08 10.3  0.17  98
523700         19:38:13.7 +20:07:11 15.8        99
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 20.1 km RECON observability=1.0 and success probability=19.9%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Kelowna 07:04:56 -33.9 Dark Down 45.9 242.6 Up 06:58:21 - 07:11:31 -347
Summerland 07:04:58 -34.1 Dark Down 46.2 242.5 Up 06:58:23 - 07:11:33 -362
Penticton 07:04:58 -34.2 Dark Down 46.2 242.7 Up 06:58:23 - 07:11:33 -373
Okanagan Falls 07:04:58 -34.4 Dark Down 46.3 242.9 Up 06:58:23 - 07:11:33 -389
Oliver 07:04:59 -34.5 Dark Down 46.4 243.1 Up 06:58:24 - 07:11:34 -405
Anarchist Mountain Observatory 07:04:58 -34.7 Dark Down 46.3 243.4 Up 06:58:23 - 07:11:33 -429
Oroville 07:04:59 -34.8 Dark Down 46.4 243.4 Up 06:58:24 - 07:11:34 -432
Tonasket 07:04:59 -35.0 Dark Down 46.5 243.6 Up 06:58:24 - 07:11:34 -454
Okanogan 07:05:00 -35.3 Dark Down 46.7 243.8 Up 06:58:25 - 07:11:35 -478
Brewster 07:05:01 -35.5 Dark Down 47.0 243.9 Up 06:58:26 - 07:11:36 -494
Manson/Chelan 07:05:03 -35.7 Dark Down 47.3 243.7 Up 06:58:28 - 07:11:38 -497
Entiat 07:05:03 -35.9 Dark Down 47.4 243.8 Up 06:58:28 - 07:11:38 -514
Wenatchee 07:05:04 -36.1 Dark Down 47.6 244.0 Up 06:58:29 - 07:11:39 -533
Ellensburg 07:05:05 -36.4 Dark Down 47.9 244.1 Up 06:58:30 - 07:11:40 -560
Yakima 07:05:06 -36.8 Dark Down 48.1 244.5 Up 06:58:31 - 07:11:41 -596
Toppenish/White Swan 07:05:07 -37.1 Dark Down 48.1 244.9 Up 06:58:32 - 07:11:42 -623
Goldendale 07:05:09 -37.5 Dark Down 48.6 245.1 Up 06:58:34 - 07:11:44 -653
The Dalles 07:05:09 -37.6 Dark Down 48.9 244.9 Up 06:58:34 - 07:11:44 -657
Pasco 07:05:04 -37.4 Dark Down 47.3 246.4 Up 06:58:29 - 07:11:39 -689
Maupin 07:05:11 -38.1 Dark Down 49.0 245.5 Up 06:58:36 - 07:11:46 -698
George/Umatilla 07:05:05 -37.7 Dark Down 47.6 246.5 Up 06:58:30 - 07:11:40 -710
PNWRO 07:05:04 -37.7 Dark Down 47.3 246.8 Up 06:58:29 - 07:11:39 -721
Madras/Culver 07:05:12 -38.6 Dark Down 49.2 246.0 Up 06:58:37 - 07:11:47 -745
Sisters 07:05:14 -38.8 Dark Down 49.7 245.9 Up 06:58:39 - 07:11:49 -753
Redmond 07:05:13 -38.9 Dark Down 49.4 246.3 Up 06:58:38 - 07:11:48 -774
Bend 07:05:14 -39.1 Dark Down 49.6 246.4 Up 06:58:39 - 07:11:49 -787
Oregon Observatory 07:05:14 -39.2 Dark Down 49.8 246.5 Up 06:58:39 - 07:11:49 -796
La Pine/Gilchrist 07:05:16 -39.4 Dark Down 49.9 246.6 Up 06:58:41 - 07:11:51 -811
North Lake 07:05:15 -39.9 Dark Down 49.6 247.7 Up 06:58:40 - 07:11:50 -878
Chiloquin 07:05:19 -40.4 Dark Down 50.5 247.5 Up 06:58:44 - 07:11:54 -891
Klamath Falls 07:05:19 -40.7 Dark Down 50.6 248.0 Up 06:58:44 - 07:11:54 -925
Paisley 07:05:16 -40.6 Dark Down 49.6 248.7 Up 06:58:41 - 07:11:51 -943
Tulelake 07:05:20 -41.0 Dark Down 50.5 248.6 Up 06:58:45 - 07:11:55 -963
Lakeview 07:05:17 -41.1 Dark Down 49.6 249.4 Up 06:58:42 - 07:11:52 -997
Fall River/Burney 07:05:22 -41.9 Dark Down 50.8 249.7 Up 06:58:47 - 07:11:57 -1046
Cedarville 07:05:18 -41.7 Dark Down 49.7 250.3 Up 06:58:43 - 07:11:53 -1063
Susanville 07:05:22 -42.7 Dark Down 50.4 251.2 Up 06:58:47 - 07:11:57 -1137
Greenville 07:05:24 -42.9 Dark Down 50.7 251.2 Up 06:58:49 - 07:11:59 -1147
Gimple 07:05:24 -42.9 Dark Down 50.7 251.3 Up 06:58:49 - 07:11:59 -1151
Quincy 07:05:24 -43.1 Dark Down 50.8 251.4 Up 06:58:49 - 07:11:59 -1165
Portola 07:05:24 -43.3 Dark Down 50.5 252.0 Up 06:58:49 - 07:11:59 -1199
Reno 07:05:23 -43.7 Dark Down 50.1 252.9 Up 06:58:48 - 07:11:58 -1254
Carson City 07:05:23 -44.1 Dark Down 50.2 253.4 Up 06:58:48 - 07:11:58 -1286
Gardnerville 07:05:25 -44.3 Dark Down 50.2 253.7 Up 06:58:50 - 07:12:00 -1310
Yerington 07:05:24 -44.4 Dark Down 49.8 254.2 Up 06:58:49 - 07:11:59 -1334
Hawthorne 07:05:23 -45.0 Dark Down 49.5 255.1 Up 06:58:48 - 07:11:58 -1400
Lee Vining 07:05:26 -45.4 Dark Down 50.0 255.4 Up 06:58:51 - 07:12:01 -1426
Tonopah 07:05:22 -45.7 Dark Down 48.5 256.8 Up 06:58:47 - 07:11:57 -1508
Bishop 07:05:27 -46.1 Dark Down 49.6 256.7 Up 06:58:52 - 07:12:02 -1513
CPSLO 07:05:37 -47.5 Dark Down 51.8 257.3 Up 06:59:02 - 07:12:12 -1576
Lone Pine 07:05:28 -46.9 Dark Down 49.5 257.8 Up 06:58:53 - 07:12:03 -1595
Beatty 07:05:24 -46.9 Dark Down 48.4 258.5 Up 06:58:49 - 07:11:59 -1631
Indian Springs 07:05:22 -47.4 Dark Down 47.6 259.7 Up 06:58:47 - 07:11:57 -1710
Wildwood 07:05:37 -49.2 Dark Down 50.4 260.4 Up 06:59:02 - 07:12:12 -1784
Henderson 07:05:23 -48.1 Dark Down 47.2 260.8 Up 06:58:48 - 07:11:58 -1789
Niwot 07:04:54 -44.7 Dark Down 39.1 263.9 Up 06:58:19 - 07:11:29 -1793
SwRI 07:04:53 -44.8 Dark Down 39.1 263.9 Up 06:58:18 - 07:11:28 -1800
Searchlight/Boulder City 07:05:25 -48.7 Dark Down 47.2 261.4 Up 06:58:50 - 07:12:00 -1843
Laughlin/Bullhead City 07:05:25 -49.0 Dark Down 47.0 262.0 Up 06:58:50 - 07:12:00 -1884
Patrick 07:05:23 -48.9 Dark Down 46.4 262.2 Up 06:58:48 - 07:11:58 -1895
Kingman/Dolan Springs 07:05:24 -49.1 Dark Down 46.5 262.3 Up 06:58:49 - 07:11:59 -1906
Idyllwild 07:05:33 -50.0 Dark Down 48.9 262.1 Up 06:58:58 - 07:12:08 -1908
Mohave Valley 07:05:25 -49.3 Dark Down 47.0 262.3 Up 06:58:50 - 07:12:00 -1909
DCO 07:05:22 -49.3 Dark Down 45.8 263.0 Up 06:58:47 - 07:11:57 -1953
Lake Havasu City 07:05:25 -49.7 Dark Down 46.8 262.9 Up 06:58:50 - 07:12:00 -1955
Parker 07:05:27 -50.1 Dark Down 46.8 263.3 Up 06:58:52 - 07:12:02 -1987
Calipatria 07:05:33 -50.8 Dark Down 48.0 263.6 Up 06:58:58 - 07:12:08 -2018
Blythe 07:05:29 -50.5 Dark Down 47.1 263.6 Up 06:58:54 - 07:12:04 -2019
Yuma 07:05:31 -51.4 Dark Down 47.3 264.6 Up 06:58:56 - 07:12:06 -2097

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 523700, (2021/09/09 07:08UT)
Object            RA         Dec     mag  sep  mel
Vega           18:36:56.7 +38:47:07  0.0 22.79  86
Tarazed        19:46:15.6 +10:36:48  2.7  9.70 100
9 Vul          19:34:34.9 +19:46:24  4.7  0.70  98
PPM 109337     19:36:37.7 +20:19:58  8.1  0.30  98
PPM 109350     19:37:04.9 +20:17:12  9.9  0.22  98
PPM 136647     19:37:53.2 +19:58:07 10.3  0.17  98
523700         19:37:16.7 +20:04:11 15.8        98
Positions are for J2000

Event circumstances last updated at 2019/06/08 02:20:13 UT

Marc W. Buie, Southwest Research Institute

RECON