RECON: TNO occultation with 524435

Event between (524435) 02CY248 and star GA1000:03365578 with event index number of 1592121

Geocentric closest approach at 2021/10/21 11:05:05 UTC

J2000 position of star is 09:38:17.9 +11:24:24
Equinox of date position of star is 09:39:20.9 +11:19:05
Stellar brightness G=15.0, use SENSEUP=128
Star is 105 degrees from the moon. Moon is 99% illuminated.
TNO apparent brightness V=22.6

[RECON map]
TNO is 50.6 AU from the Sun and 51.0 AU from the Earth.
The TNO is moving 16.3 km/sec on the sky relative to the star, or, 1.6 arcsec/hr.
The 1-sigma error in the time of the event is 467 seconds.
The 1-sigma cross-track error in the shadow position is 5324 km.
The sky-plane scale is 36963.5 km/arcsec.

The TNO has an absolute magnitude Hv=5.4
Diameter=501.2 km assuming a 5% albedo -- 30.8 sec chord
Diameter=204.6 km assuming a 30% albedo -- 12.6 sec chord
Dynamical classification is CLASSICAL
 
 
 
 
 
 

Star training set for 524435, (2021/10/21 11:05UT)
Object            RA         Dec     mag  sep  mel
Regulus        10:09:31.9 +11:51:35  1.3  7.38 112
5Xi Leo        09:33:07.1 +11:12:08  5.0  1.56 104
PPM 126619     09:37:32.4 +11:20:02  8.5  0.47 105
PPM 126641     09:39:08.0 +11:13:48  8.9  0.11 105
524435         09:39:28.3 +11:18:27 15.0       106
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 1.9 sigma about the mid-time.
The median site spacing is 24.1 km RECON observability=1.0 and success probability=9.2%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Kelowna 10:59:33 -33.8 Dark Up 22.2 98.8 Low 10:44:33 - 11:14:33 3572
Summerland 10:59:33 -34.1 Dark Up 22.1 98.5 Low 10:44:33 - 11:14:33 3542
Penticton 10:59:33 -34.0 Dark Up 22.2 98.5 Low 10:44:33 - 11:14:33 3535
Okanagan Falls 10:59:33 -34.1 Dark Up 22.2 98.4 Low 10:44:33 - 11:14:33 3516
Oliver 10:59:31 -34.2 Dark Up 22.2 98.4 Low 10:44:31 - 11:14:31 3499
Anarchist Mountain Observatory 10:59:33 -34.2 Dark Up 22.4 98.5 Low 10:44:33 - 11:14:33 3481
Oroville 10:59:31 -34.2 Dark Up 22.3 98.4 Low 10:44:31 - 11:14:31 3473
Tonasket 10:59:31 -34.3 Dark Up 22.4 98.3 Low 10:44:31 - 11:14:31 3449
Okanogan 10:59:30 -34.6 Dark Up 22.3 98.0 Low 10:44:30 - 11:14:30 3415
Brewster 10:59:30 -34.8 Dark Up 22.2 97.8 Low 10:44:30 - 11:14:30 3387
Manson/Chelan 10:59:28 -35.1 Dark Up 22.0 97.4 Low 10:44:28 - 11:14:28 3366
Wenatchee 10:59:26 -35.5 Dark Up 21.9 97.0 Low 10:44:26 - 11:14:26 3317
Ellensburg 10:59:25 -35.8 Dark Up 21.8 96.7 Low 10:44:25 - 11:14:25 3274
Yakima 10:59:25 -36.0 Dark Up 21.9 96.5 Low 10:44:25 - 11:14:25 3231
Toppenish/White Swan 10:59:24 -35.9 Dark Up 22.0 96.6 Low 10:44:24 - 11:14:24 3209
Pasco 10:59:26 -35.2 Dark Up 22.9 97.5 Low 10:44:26 - 11:14:26 3194
PNWRO 10:59:26 -35.1 Dark Up 23.1 97.6 Low 10:44:26 - 11:14:26 3167
George/Umatilla 10:59:24 -35.5 Dark Up 22.8 97.2 Low 10:44:24 - 11:14:24 3159
Goldendale 10:59:23 -36.4 Dark Up 21.8 96.0 Low 10:44:23 - 11:14:23 3151
The Dalles 10:59:22 -36.8 Dark Up 21.5 95.7 Low 10:44:22 - 11:14:22 3128
Maupin 10:59:22 -36.9 Dark Up 21.6 95.6 Low 10:44:22 - 11:14:22 3084
Madras/Culver 10:59:19 -37.2 Dark Up 21.6 95.3 Low 10:44:19 - 11:14:19 3026
Sisters 10:59:18 -37.6 Dark Up 21.4 94.9 Low 10:44:18 - 11:14:18 2992
Redmond 10:59:18 -37.3 Dark Up 21.6 95.1 Low 10:44:18 - 11:14:18 2989
Bend 10:59:17 -37.5 Dark Up 21.6 95.0 Low 10:44:17 - 11:14:17 2966
Oregon Observatory 10:59:18 -37.7 Dark Up 21.5 94.8 Low 10:44:18 - 11:14:18 2948
La Pine/Gilchrist 10:59:16 -37.8 Dark Up 21.4 94.7 Low 10:44:16 - 11:14:16 2926
North Lake 10:59:19 -37.6 Dark Up 21.9 94.9 Low 10:44:19 - 11:14:19 2879
Paisley 10:59:16 -37.6 Dark Up 22.2 95.0 Low 10:44:16 - 11:14:16 2819
Chiloquin 10:59:14 -38.5 Dark Up 21.3 94.0 Low 10:44:14 - 11:14:14 2809
Klamath Falls 10:59:15 -38.6 Dark Up 21.4 93.9 Low 10:44:15 - 11:14:15 2772
Lakeview 10:59:17 -37.6 Dark Up 22.4 94.9 Low 10:44:17 - 11:14:17 2764
Tulelake 10:59:15 -38.5 Dark Up 21.6 94.0 Low 10:44:15 - 11:14:15 2742
Cedarville 10:59:15 -37.7 Dark Up 22.6 94.7 Low 10:44:15 - 11:14:15 2693
Fall River/Burney 10:59:12 -38.8 Dark Up 21.7 93.7 Low 10:44:12 - 11:14:12 2644
SwRI 10:59:52 -27.1 Dark Up 34.1 104.8 Up 10:44:52 - 11:14:52 2574
Susanville 10:59:12 -38.5 Dark Up 22.3 93.9 Low 10:44:12 - 11:14:12 2574
Greenville 10:59:12 -38.8 Dark Up 22.1 93.6 Low 10:44:12 - 11:14:12 2545
Gimple 10:59:14 -38.7 Dark Up 22.2 93.7 Low 10:44:14 - 11:14:14 2545
Quincy 10:59:11 -38.9 Dark Up 22.1 93.5 Low 10:44:11 - 11:14:11 2523
Portola 10:59:13 -38.6 Dark Up 22.5 93.8 Low 10:44:13 - 11:14:13 2508
Reno 10:59:13 -38.2 Dark Up 23.0 94.1 Low 10:44:13 - 11:14:13 2478
Carson City 10:59:13 -38.3 Dark Up 23.1 94.0 Low 10:44:13 - 11:14:13 2439
Yerington 10:59:14 -37.9 Dark Up 23.6 94.3 Low 10:44:14 - 11:14:14 2417
Gardnerville 10:59:12 -38.3 Dark Up 23.1 93.9 Low 10:44:12 - 11:14:12 2413
Hawthorne 10:59:14 -37.6 Dark Up 24.0 94.5 Low 10:44:14 - 11:14:14 2366
Tonopah 10:59:19 -36.7 Dark Up 25.2 95.2 Low 10:44:19 - 11:14:19 2314
Lee Vining 10:59:12 -38.2 Dark Up 23.7 93.9 Low 10:44:12 - 11:14:12 2305
Bishop 10:59:15 -37.8 Dark Up 24.3 94.1 Low 10:44:15 - 11:14:15 2239
Beatty 10:59:16 -36.7 Dark Up 25.6 94.9 Low 10:44:16 - 11:14:16 2188
Lone Pine 10:59:14 -37.8 Dark Up 24.6 94.0 Low 10:44:14 - 11:14:14 2155
Indian Springs 10:59:19 -35.9 Dark Up 26.5 95.5 Low 10:44:19 - 11:14:19 2153
Henderson 10:59:21 -35.5 Dark Up 27.1 95.6 Low 10:44:21 - 11:14:21 2095
Searchlight/Boulder City 10:59:19 -35.6 Dark Up 27.2 95.4 Low 10:44:19 - 11:14:19 2032
Patrick 10:59:24 -34.7 Dark Up 28.1 96.0 Low 10:44:24 - 11:14:24 2028
CPSLO 10:59:06 -40.2 Dark Up 22.5 91.8 Low 10:44:06 - 11:14:06 2017
Kingman/Dolan Springs 10:59:22 -35.0 Dark Up 28.0 95.8 Low 10:44:22 - 11:14:22 2004
Laughlin/Bullhead City 10:59:22 -35.4 Dark Up 27.6 95.4 Low 10:44:22 - 11:14:22 2000
Mohave Valley 10:59:20 -35.4 Dark Up 27.6 95.3 Low 10:44:20 - 11:14:20 1970
Lake Havasu City 10:59:22 -35.3 Dark Up 27.8 95.3 Low 10:44:22 - 11:14:22 1927
Parker 10:59:20 -35.4 Dark Up 27.9 95.1 Low 10:44:20 - 11:14:20 1888
Wildwood 10:59:10 -38.9 Dark Up 24.3 92.5 Low 10:44:10 - 11:14:10 1880
Idyllwild 10:59:14 -37.4 Dark Up 25.9 93.4 Low 10:44:14 - 11:14:14 1840
Blythe 10:59:19 -35.7 Dark Up 27.7 94.6 Low 10:44:19 - 11:14:19 1830
Calipatria 10:59:17 -36.6 Dark Up 26.9 93.8 Low 10:44:17 - 11:14:17 1774
Yuma 10:59:19 -35.9 Dark Up 27.7 94.1 Low 10:44:19 - 11:14:19 1727

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 524435, (2021/10/21 11:05UT)
Object            RA         Dec     mag  sep  mel
Regulus        10:08:22.0 +11:58:02  1.3  7.38 112
5Xi Leo        09:31:56.6 +11:17:58  5.0  1.56 104
PPM 126619     09:36:21.9 +11:25:57  8.5  0.47 105
PPM 126641     09:37:57.6 +11:19:45  8.9  0.11 105
524435         09:38:17.9 +11:24:24 15.0       105
Positions are for J2000

Event circumstances last updated at 2019/07/03 21:58:51 UT

Marc W. Buie, Southwest Research Institute

RECON