RECON: TNO occultation with 525816

Event between (525816) 05SF278 and star GA1020:00440260 with event index number of 1594637

Geocentric closest approach at 2023/10/24 07:01:09 UTC

J2000 position of star is 04:18:07.3 +12:49:21
Equinox of date position of star is 04:19:14.8 +12:52:14
Stellar brightness G=16.0, use SENSEUP=128
Star is 95 degrees from the moon. Moon is 74% illuminated.
TNO apparent brightness V=25.6

[RECON map]
TNO is 35.5 AU from the Sun and 34.7 AU from the Earth.
The TNO is moving 19.6 km/sec on the sky relative to the star, or, 2.8 arcsec/hr.
The 1-sigma error in the time of the event is 153 seconds.
The 1-sigma cross-track error in the shadow position is 1737 km.
The sky-plane scale is 25183.1 km/arcsec.

The TNO has an absolute magnitude Hv=10.0
Diameter=288.4 km assuming a 5% albedo -- 3.1 sec chord
Diameter=117.7 km assuming a 30% albedo -- 1.3 sec chord
Dynamical classification is 7:4EEE
 
 
 
 
 
 

Star training set for 525816, (2023/10/24 07:01UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:37:17.4 +16:33:19  0.8  5.67 100
Bellatrix      05:26:24.6 +06:22:09  1.6 17.73 109
PPM 119807     04:22:13.2 +13:55:10  6.3  1.24  96
PPM 119786     04:20:47.9 +12:01:19  7.6  0.92  95
PPM 119778     04:20:12.0 +12:58:52  8.6  0.21  95
525816         04:19:27.1 +12:52:45 16.0        95
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 16.6 km RECON observability=1.0 and success probability=11.8%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Clarence Fulton 07:02:45 -50.6 Dark Up 37.3 118.7 Up 06:49:29 - 07:16:01 3720
Victoria 07:03:01 -51.4 Dark Up 35.7 113.6 Up 06:49:45 - 07:16:17 3701
Kelowna 07:02:48 -51.0 Dark Up 37.4 118.2 Up 06:49:32 - 07:16:04 3698
Peachland 07:02:48 -51.0 Dark Up 37.3 117.9 Up 06:49:32 - 07:16:04 3697
Summerland 07:02:48 -51.2 Dark Up 37.4 117.9 Up 06:49:32 - 07:16:04 3685
Penticton 07:02:48 -51.3 Dark Up 37.5 117.9 Up 06:49:32 - 07:16:04 3678
Oliver 07:02:50 -51.6 Dark Up 37.7 117.7 Up 06:49:34 - 07:16:06 3654
Anarchist Mountain Observatory 07:02:49 -51.8 Dark Up 37.9 117.8 Up 06:49:33 - 07:16:05 3639
Tonasket 07:02:52 -52.1 Dark Up 38.0 117.5 Up 06:49:36 - 07:16:08 3619
Okanogan 07:02:53 -52.4 Dark Up 38.0 117.1 Up 06:49:37 - 07:16:09 3600
Brewster 07:02:54 -52.6 Dark Up 38.0 116.7 Up 06:49:38 - 07:16:10 3586
Manson/Chelan 07:02:56 -52.8 Dark Up 37.9 116.2 Up 06:49:40 - 07:16:12 3581
Entiat 07:02:58 -52.9 Dark Up 38.0 116.0 Up 06:49:42 - 07:16:14 3567
Wenatchee 07:02:58 -53.2 Dark Up 38.0 115.8 Up 06:49:42 - 07:16:14 3552
Ellensburg 07:03:01 -53.5 Dark Up 38.1 115.3 Up 06:49:45 - 07:16:17 3529
Yakima 07:03:03 -53.9 Dark Up 38.2 115.0 Up 06:49:47 - 07:16:19 3501
Toppenish/White Swan 07:03:02 -54.1 Dark Up 38.4 115.0 Up 06:49:46 - 07:16:18 3481
Goldendale 07:03:06 -54.6 Dark Up 38.4 114.2 Up 06:49:50 - 07:16:22 3453
The Dalles 07:03:08 -54.7 Dark Up 38.3 113.7 Up 06:49:52 - 07:16:24 3446
Pasco 07:03:01 -54.5 Dark Up 39.3 116.1 Up 06:49:45 - 07:16:17 3441
PNWRO 07:03:01 -54.8 Dark Up 39.5 116.1 Up 06:49:45 - 07:16:17 3418
Maupin 07:03:09 -55.1 Dark Up 38.5 113.5 Up 06:49:53 - 07:16:25 3413
Sisters 07:03:15 -55.8 Dark Up 38.6 112.4 Up 06:49:59 - 07:16:31 3363
Redmond 07:03:13 -56.0 Dark Up 38.8 112.7 Up 06:49:57 - 07:16:29 3350
Bend 07:03:14 -56.1 Dark Up 38.8 112.5 Up 06:49:58 - 07:16:30 3338
Oregon Observatory 07:03:16 -56.3 Dark Up 38.8 112.2 Up 06:50:00 - 07:16:32 3329
La Pine/Gilchrist 07:03:17 -56.4 Dark Up 38.8 112.0 Up 06:50:01 - 07:16:33 3316
North Lake 07:03:17 -57.0 Dark Up 39.4 112.2 Up 06:50:01 - 07:16:33 3268
Paisley 07:03:18 -57.6 Dark Up 39.9 112.1 Up 06:50:02 - 07:16:34 3217
Klamath Falls 07:03:22 -57.7 Dark Up 39.2 110.7 Up 06:50:06 - 07:16:38 3214
Lakeview 07:03:20 -58.1 Dark Up 40.2 111.9 Up 06:50:04 - 07:16:36 3174
Cedarville 07:03:22 -58.8 Dark Up 40.6 111.6 Up 06:50:06 - 07:16:38 3119
Fall River/Burney 07:03:26 -58.9 Dark Up 39.9 110.1 Up 06:50:10 - 07:16:42 3114
Susanville 07:03:27 -59.7 Dark Up 40.6 110.3 Up 06:50:11 - 07:16:43 3045
Greenville 07:03:28 -59.9 Dark Up 40.5 109.8 Up 06:50:12 - 07:16:44 3032
Gimple 07:03:28 -59.9 Dark Up 40.6 109.9 Up 06:50:12 - 07:16:44 3029
Quincy 07:03:29 -60.1 Dark Up 40.6 109.6 Up 06:50:13 - 07:16:45 3015
Portola 07:03:28 -60.3 Dark Up 41.0 110.0 Up 06:50:12 - 07:16:44 2993
Reno 07:03:28 -60.8 Dark Up 41.5 110.3 Up 06:50:12 - 07:16:44 2954
Carson City 07:03:28 -61.1 Dark Up 41.7 110.0 Up 06:50:12 - 07:16:44 2925
Gardnerville 07:03:29 -61.3 Dark Up 41.8 109.9 Up 06:50:13 - 07:16:45 2904
Yerington 07:03:28 -61.5 Dark Up 42.2 110.4 Up 06:50:12 - 07:16:44 2891
Hawthorne 07:03:27 -62.0 Dark Up 42.8 110.5 Up 06:50:11 - 07:16:43 2839
Lee Vining 07:03:31 -62.4 Dark Up 42.6 109.6 Up 06:50:15 - 07:16:47 2807
Tonopah 07:03:25 -62.8 Dark Up 44.0 111.3 Up 06:50:09 - 07:16:41 2761
Bishop 07:03:31 -63.2 Dark Up 43.3 109.7 Up 06:50:15 - 07:16:47 2737
Beatty 07:03:27 -64.0 Dark Up 44.7 110.7 Up 06:50:11 - 07:16:43 2652
Niwot 07:02:19 -61.3 Dark Up 51.0 125.5 Up 06:49:03 - 07:15:35 2635
SwRI 07:02:19 -61.4 Dark Up 51.0 125.2 Up 06:49:03 - 07:15:35 2631
CPSLO 07:03:45 -64.4 Dark Up 42.3 106.0 Up 06:50:29 - 07:17:01 2630
Indian Springs 07:03:26 -64.6 Dark Up 45.6 111.3 Up 06:50:10 - 07:16:42 2593
Henderson 07:03:26 -65.2 Dark Up 46.4 111.4 Up 06:50:10 - 07:16:42 2528
Searchlight/Boulder City 07:03:27 -65.8 Dark Up 46.6 110.9 Up 06:50:11 - 07:16:43 2477
Wildwood 07:03:43 -66.2 Dark Up 44.2 106.6 Up 06:50:27 - 07:16:59 2466
Patrick 07:03:24 -66.0 Dark Up 47.4 111.8 Up 06:50:08 - 07:16:40 2441
Laughlin/Bullhead City 07:03:27 -66.1 Dark Up 47.0 110.9 Up 06:50:11 - 07:16:43 2441
Kingman/Dolan Springs 07:03:24 -66.2 Dark Up 47.4 111.4 Up 06:50:08 - 07:16:40 2428
Mohave Valley 07:03:27 -66.4 Dark Up 47.1 110.7 Up 06:50:11 - 07:16:43 2417
DCO 07:03:23 -66.4 Dark Up 48.1 112.1 Up 06:50:07 - 07:16:39 2394
Idyllwild 07:03:39 -67.1 Dark Up 45.8 107.7 Up 06:50:23 - 07:16:55 2380
Lake Havasu City 07:03:28 -66.8 Dark Up 47.4 110.5 Up 06:50:12 - 07:16:44 2375
Parker 07:03:29 -67.2 Dark Up 47.6 110.1 Up 06:50:13 - 07:16:45 2343
Blythe 07:03:32 -67.6 Dark Up 47.5 109.4 Up 06:50:16 - 07:16:48 2306
Calipatria 07:03:36 -67.9 Dark Up 47.0 108.1 Up 06:50:20 - 07:16:52 2290
George/Scottsdale 07:03:22 -67.9 Dark Up 49.6 111.9 Up 06:50:06 - 07:16:38 2234
Yuma 07:03:34 -68.5 Dark Up 47.8 108.4 Up 06:50:18 - 07:16:50 2225

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 525816, (2023/10/24 07:01UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:35:55.3 +16:30:30  0.8  5.67 100
Bellatrix      05:25:07.8 +06:20:58  1.6 17.73 109
PPM 119807     04:20:52.9 +13:51:52  6.3  1.24  96
PPM 119786     04:19:28.6 +11:57:58  7.6  0.92  95
PPM 119778     04:18:52.2 +12:55:29  8.6  0.21  95
525816         04:18:07.3 +12:49:21 16.0        95
Positions are for J2000

Event circumstances last updated at 2020/02/25 00:07:04 UT

Marc W. Buie, Southwest Research Institute

RECON