RECON: TNO occultation with 504555

Event between (504555) 08SO266 and star GA0880:00264034 with event index number of 1344000

Geocentric closest approach at 2023/10/10 09:51:48 UTC

J2000 position of star is 03:12:09.6 -00:30:19
Equinox of date position of star is 03:13:11.4 -00:25:50
Stellar brightness G=12.9, use SENSEUP=32
Star is 104 degrees from the moon. Moon is 17% illuminated.
TNO apparent brightness V=25.5

[RECON map]
TNO is 34.8 AU from the Sun and 34.0 AU from the Earth.
The TNO is moving 21.7 km/sec on the sky relative to the star, or, 3.2 arcsec/hr.
The 1-sigma error in the time of the event is 393 seconds.
The 1-sigma cross-track error in the shadow position is 3703 km.
The sky-plane scale is 24633.9 km/arcsec.

The TNO has an absolute magnitude Hv=10.0
Diameter=346.7 km assuming a 5% albedo -- 2.8 sec chord
Diameter=141.6 km assuming a 30% albedo -- 1.1 sec chord
Dynamical classification is 3:2E
 
 
 
 
 
 

Star training set for 504555, (2023/10/10 09:52UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:37:17.2 +16:33:19  0.8 26.76  80
Menkar         03:03:31.5 +04:10:54  2.5  5.22 105
94 Cet         03:13:59.3 -01:06:31  5.1  0.71 104
PPM 175259     03:12:53.2 -00:24:22  8.0  0.12 104
504555         03:13:22.5 -00:25:01 12.9       104
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 2.3 sigma about the mid-time.
The median site spacing is 17.2 km RECON observability=1.0 and success probability=10.8%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Victoria 09:50:17 -42.1 Dark Down 40.8 173.2 Up 09:35:17 - 10:05:17 -1350
Clarence Fulton 09:50:02 -39.1 Dark Up 39.2 178.6 Up 09:35:02 - 10:05:02 -1389
Peachland 09:50:04 -39.7 Dark Up 39.7 178.0 Up 09:35:04 - 10:05:04 -1403
Kelowna 09:50:03 -39.4 Dark Up 39.6 178.4 Up 09:35:03 - 10:05:03 -1407
Summerland 09:50:04 -39.7 Dark Up 39.9 178.1 Up 09:35:04 - 10:05:04 -1416
Penticton 09:50:04 -39.7 Dark Up 39.9 178.3 Up 09:35:04 - 10:05:04 -1424
Oliver 09:50:04 -40.0 Dark Up 40.3 178.3 Up 09:35:04 - 10:05:04 -1446
Anarchist Mountain Observatory 09:50:04 -40.0 Dark Up 40.5 178.5 Up 09:35:04 - 10:05:04 -1463
Tonasket 09:50:04 -40.3 Dark Up 40.8 178.4 Up 09:35:04 - 10:05:04 -1480
Okanogan 09:50:05 -40.6 Dark Up 41.1 178.2 Up 09:35:05 - 10:05:05 -1496
Manson/Chelan 09:50:08 -41.2 Dark Up 41.6 177.4 Up 09:35:08 - 10:05:08 -1506
Brewster 09:50:07 -40.9 Dark Up 41.4 177.9 Up 09:35:07 - 10:05:07 -1506
Entiat 09:50:09 -41.4 Dark Up 41.8 177.3 Up 09:35:09 - 10:05:09 -1517
Wenatchee 09:50:09 -41.6 Dark Up 42.1 177.2 Up 09:35:09 - 10:05:09 -1530
Ellensburg 09:50:11 -42.0 Dark Up 42.5 176.9 Up 09:35:11 - 10:05:11 -1548
Yakima 09:50:12 -42.3 Dark Up 42.9 176.9 Up 09:35:12 - 10:05:12 -1574
Toppenish/White Swan 09:50:12 -42.4 Dark Up 43.1 177.1 Up 09:35:12 - 10:05:12 -1594
Goldendale 09:50:14 -43.0 Dark Down 43.6 176.5 Up 09:35:14 - 10:05:14 -1614
The Dalles 09:50:15 -43.4 Dark Down 43.8 176.0 Up 09:35:15 - 10:05:15 -1615
Maupin 09:50:16 -43.6 Dark Down 44.2 176.1 Up 09:35:16 - 10:05:16 -1647
Pasco 09:50:08 -41.9 Dark Up 43.2 178.8 Up 09:35:08 - 10:05:08 -1649
PNWRO 09:50:08 -42.0 Dark Up 43.5 179.1 Up 09:35:08 - 10:05:08 -1674
Sisters 09:50:19 -44.5 Dark Down 45.1 175.3 Up 09:35:19 - 10:05:19 -1686
Redmond 09:50:18 -44.3 Dark Down 45.1 175.9 Up 09:35:18 - 10:05:18 -1703
Bend 09:50:19 -44.5 Dark Down 45.4 175.7 Up 09:35:19 - 10:05:19 -1712
Oregon Observatory 09:50:19 -44.7 Dark Down 45.5 175.5 Up 09:35:19 - 10:05:19 -1719
La Pine/Gilchrist 09:50:20 -44.9 Dark Down 45.7 175.4 Up 09:35:20 - 10:05:20 -1730
North Lake 09:50:19 -44.9 Dark Down 46.2 176.2 Up 09:35:19 - 10:05:19 -1783
Klamath Falls 09:50:24 -46.1 Dark Down 47.2 174.9 Up 09:35:24 - 10:05:24 -1819
Paisley 09:50:19 -45.1 Dark Down 46.8 176.7 Up 09:35:19 - 10:05:19 -1835
Lakeview 09:50:19 -45.4 Dark Down 47.3 177.0 Up 09:35:19 - 10:05:19 -1878
Fall River/Burney 09:50:25 -46.7 Dark Down 48.4 175.4 Up 09:35:25 - 10:05:25 -1917
Cedarville 09:50:20 -45.7 Dark Down 47.9 177.2 Up 09:35:20 - 10:05:20 -1932
Susanville 09:50:24 -46.8 Dark Down 49.0 176.4 Up 09:35:24 - 10:05:24 -1992
Greenville 09:50:25 -47.1 Dark Down 49.3 176.0 Up 09:35:25 - 10:05:25 -2000
Gimple 09:50:25 -47.1 Dark Down 49.3 176.1 Up 09:35:25 - 10:05:25 -2004
Quincy 09:50:25 -47.2 Dark Down 49.5 175.9 Up 09:35:25 - 10:05:25 -2015
Portola 09:50:24 -47.1 Dark Down 49.6 176.7 Up 09:35:24 - 10:05:24 -2044
Reno 09:50:22 -46.9 Dark Down 49.9 177.6 Up 09:35:22 - 10:05:22 -2090
Carson City 09:50:23 -47.1 Dark Down 50.3 177.7 Up 09:35:23 - 10:05:23 -2117
Gardnerville 09:50:23 -47.2 Dark Down 50.5 177.7 Up 09:35:23 - 10:05:23 -2137
Yerington 09:50:21 -46.9 Dark Down 50.5 178.6 Up 09:35:21 - 10:05:21 -2158
Hawthorne 09:50:20 -46.8 Dark Down 51.0 179.5 Up 09:35:20 - 10:05:20 -2215
Lee Vining 09:50:23 -47.5 Dark Down 51.5 178.7 Up 09:35:23 - 10:05:23 -2237
Tonopah 09:50:16 -46.3 Dark Down 51.4 181.7 Up 09:35:16 - 10:05:16 -2310
Bishop 09:50:22 -47.4 Dark Down 52.1 179.8 Up 09:35:22 - 10:05:22 -2314
CPSLO 09:50:34 -50.1 Dark Down 54.1 176.1 Up 09:35:34 - 10:05:34 -2376
Beatty 09:50:17 -46.7 Dark Down 52.6 182.5 Up 09:35:17 - 10:05:17 -2419
Indian Springs 09:50:13 -46.2 Dark Up 52.8 184.3 Up 09:35:13 - 10:05:13 -2492
Wildwood 09:50:29 -49.5 Dark Down 55.4 179.5 Up 09:35:29 - 10:05:29 -2561
Henderson 09:50:12 -46.0 Dark Up 53.3 185.5 Up 09:35:12 - 10:05:12 -2564
Searchlight/Boulder City 09:50:13 -46.3 Dark Up 53.9 185.7 Up 09:35:13 - 10:05:13 -2613
Niwot 09:49:32 -37.4 Dark Up 47.7 199.4 Up 09:34:32 - 10:04:32 -2645
SwRI 09:49:32 -37.5 Dark Up 47.8 199.3 Up 09:34:32 - 10:04:32 -2650
Laughlin/Bullhead City 09:50:12 -46.2 Dark Up 54.2 186.3 Up 09:35:12 - 10:05:12 -2652
Patrick 09:50:09 -45.6 Dark Up 53.9 187.4 Up 09:35:09 - 10:05:09 -2663
Kingman/Dolan Springs 09:50:10 -45.8 Dark Up 54.1 187.2 Up 09:35:10 - 10:05:10 -2673
Idyllwild 09:50:23 -48.4 Dark Down 55.7 182.8 Up 09:35:23 - 10:05:23 -2674
Mohave Valley 09:50:12 -46.3 Dark Up 54.4 186.4 Up 09:35:12 - 10:05:12 -2675
Lake Havasu City 09:50:13 -46.4 Dark Up 54.8 186.9 Up 09:35:13 - 10:05:13 -2718
DCO 09:50:07 -45.2 Dark Up 54.1 188.7 Up 09:35:07 - 10:05:07 -2719
Parker 09:50:13 -46.5 Dark Up 55.2 187.0 Up 09:35:13 - 10:05:13 -2748
Calipatria 09:50:19 -47.9 Dark Down 56.3 185.0 Up 09:35:19 - 10:05:19 -2777
Blythe 09:50:15 -47.0 Dark Up 55.7 186.5 Up 09:35:15 - 10:05:15 -2778
Yuma 09:50:17 -47.5 Dark Down 56.6 186.6 Up 09:35:17 - 10:05:17 -2853
George/Scottsdale 09:50:05 -45.0 Dark Up 55.3 191.2 Up 09:35:05 - 10:05:05 -2891

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 504555, (2023/10/10 09:52UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:35:55.3 +16:30:30  0.8 26.76  80
Menkar         03:02:16.8 +04:05:21  2.5  5.22 105
94 Cet         03:12:46.7 -01:11:47  5.1  0.71 104
PPM 175259     03:11:40.3 -00:29:40  8.0  0.12 104
504555         03:12:09.6 -00:30:19 12.9       104
Positions are for J2000

Event circumstances last updated at 2020/02/26 23:59:37 UT

Marc W. Buie, Southwest Research Institute

RECON