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 09:52:15 UTC

J2000 position of star is 03:12:09.6 -00:30:19
Equinox of date position of star is 03:13:09.0 -00:26:00
Stellar brightness G=12.9, use SENSEUP=32
Star is 104 degrees from the moon. Moon is 17% illuminated.
TNO apparent brightness V=21.7

[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 402 seconds.
The 1-sigma cross-track error in the shadow position is 3844 km.
The sky-plane scale is 24633.8 km/arcsec.

The TNO has an absolute magnitude Hv=6.2
Diameter=346.7 km assuming a 5% albedo -- 16.0 sec chord
Diameter=141.6 km assuming a 30% albedo -- 6.5 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 2.2 sigma about the mid-time.
The median site spacing is 14.8 km RECON observability=1.0 and success probability=10.0%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Kelowna 09:50:29 -39.3 Dark Up 39.6 178.6 Up 09:35:29 - 10:05:29 -1115
Summerland 09:50:30 -39.7 Dark Up 39.9 178.3 Up 09:35:30 - 10:05:30 -1124
Penticton 09:50:30 -39.7 Dark Up 39.9 178.4 Up 09:35:30 - 10:05:30 -1132
Okanagan Falls 09:50:30 -39.8 Dark Up 40.1 178.4 Up 09:35:30 - 10:05:30 -1142
Oliver 09:50:30 -39.9 Dark Up 40.3 178.4 Up 09:35:30 - 10:05:30 -1153
Anarchist Mountain Observatory 09:50:30 -40.0 Dark Up 40.5 178.6 Up 09:35:30 - 10:05:30 -1171
Oroville 09:50:31 -40.1 Dark Up 40.6 178.5 Up 09:35:31 - 10:05:31 -1173
Tonasket 09:50:31 -40.2 Dark Up 40.8 178.6 Up 09:35:31 - 10:05:31 -1188
Okanogan 09:50:32 -40.6 Dark Up 41.1 178.3 Up 09:35:32 - 10:05:32 -1203
Manson/Chelan 09:50:35 -41.2 Dark Up 41.6 177.6 Up 09:35:35 - 10:05:35 -1213
Brewster 09:50:33 -40.8 Dark Up 41.4 178.1 Up 09:35:33 - 10:05:33 -1213
Entiat 09:50:35 -41.4 Dark Up 41.8 177.5 Up 09:35:35 - 10:05:35 -1225
Wenatchee 09:50:36 -41.6 Dark Up 42.1 177.3 Up 09:35:36 - 10:05:36 -1237
Ellensburg 09:50:37 -42.0 Dark Up 42.5 177.0 Up 09:35:37 - 10:05:37 -1256
Yakima 09:50:38 -42.3 Dark Up 42.9 177.0 Up 09:35:38 - 10:05:38 -1282
Toppenish/White Swan 09:50:38 -42.4 Dark Up 43.1 177.2 Up 09:35:38 - 10:05:38 -1302
Goldendale 09:50:40 -43.0 Dark Up 43.6 176.6 Up 09:35:40 - 10:05:40 -1322
The Dalles 09:50:42 -43.3 Dark Down 43.8 176.1 Up 09:35:42 - 10:05:42 -1323
Maupin 09:50:42 -43.6 Dark Down 44.3 176.2 Up 09:35:42 - 10:05:42 -1355
Pasco 09:50:34 -41.9 Dark Up 43.2 178.9 Up 09:35:34 - 10:05:34 -1357
George/Umatilla 09:50:35 -42.2 Dark Up 43.6 178.6 Up 09:35:35 - 10:05:35 -1371
PNWRO 09:50:34 -41.9 Dark Up 43.5 179.3 Up 09:35:34 - 10:05:34 -1382
Madras/Culver 09:50:43 -44.0 Dark Down 44.8 176.1 Up 09:35:43 - 10:05:43 -1390
Sisters 09:50:45 -44.4 Dark Down 45.1 175.5 Up 09:35:45 - 10:05:45 -1395
Redmond 09:50:44 -44.3 Dark Down 45.2 176.1 Up 09:35:44 - 10:05:44 -1412
Bend 09:50:45 -44.5 Dark Down 45.4 175.8 Up 09:35:45 - 10:05:45 -1421
Oregon Observatory 09:50:46 -44.7 Dark Down 45.5 175.6 Up 09:35:46 - 10:05:46 -1427
La Pine/Gilchrist 09:50:46 -44.9 Dark Down 45.7 175.5 Up 09:35:46 - 10:05:46 -1439
North Lake 09:50:45 -44.9 Dark Down 46.2 176.4 Up 09:35:45 - 10:05:45 -1492
Chiloquin 09:50:50 -45.8 Dark Down 46.8 175.0 Up 09:35:50 - 10:05:50 -1501
Klamath Falls 09:50:50 -46.0 Dark Down 47.2 175.0 Up 09:35:50 - 10:05:50 -1528
Paisley 09:50:45 -45.1 Dark Down 46.8 176.9 Up 09:35:45 - 10:05:45 -1544
Tulelake 09:50:50 -46.1 Dark Down 47.4 175.5 Up 09:35:50 - 10:05:50 -1559
Lakeview 09:50:45 -45.3 Dark Down 47.3 177.1 Up 09:35:45 - 10:05:45 -1587
Fall River/Burney 09:50:51 -46.7 Dark Down 48.4 175.5 Up 09:35:51 - 10:05:51 -1626
Cedarville 09:50:46 -45.7 Dark Down 47.9 177.4 Up 09:35:46 - 10:05:46 -1641
Susanville 09:50:50 -46.7 Dark Down 49.0 176.6 Up 09:35:50 - 10:05:50 -1701
Greenville 09:50:51 -47.0 Dark Down 49.3 176.1 Up 09:35:51 - 10:05:51 -1709
Gimple 09:50:51 -47.0 Dark Down 49.3 176.2 Up 09:35:51 - 10:05:51 -1713
Quincy 09:50:52 -47.2 Dark Down 49.5 176.1 Up 09:35:52 - 10:05:52 -1724
Portola 09:50:50 -47.0 Dark Down 49.6 176.8 Up 09:35:50 - 10:05:50 -1753
Reno 09:50:49 -46.8 Dark Down 49.9 177.8 Up 09:35:49 - 10:05:49 -1799
Carson City 09:50:49 -47.0 Dark Down 50.3 177.8 Up 09:35:49 - 10:05:49 -1826
Gardnerville 09:50:50 -47.2 Dark Down 50.5 177.9 Up 09:35:50 - 10:05:50 -1846
Yerington 09:50:48 -46.8 Dark Down 50.5 178.8 Up 09:35:48 - 10:05:48 -1867
Hawthorne 09:50:47 -46.8 Dark Down 51.0 179.6 Up 09:35:47 - 10:05:47 -1924
Lee Vining 09:50:49 -47.4 Dark Down 51.5 178.9 Up 09:35:49 - 10:05:49 -1946
Tonopah 09:50:43 -46.2 Dark Down 51.4 181.9 Up 09:35:43 - 10:05:43 -2019
Bishop 09:50:48 -47.3 Dark Down 52.1 180.0 Up 09:35:48 - 10:05:48 -2023
CPSLO 09:51:00 -50.0 Dark Down 54.1 176.2 Up 09:36:00 - 10:06:00 -2084
Lone Pine 09:50:48 -47.6 Dark Down 52.9 180.6 Up 09:35:48 - 10:05:48 -2096
Beatty 09:50:43 -46.6 Dark Down 52.6 182.7 Up 09:35:43 - 10:05:43 -2128
Indian Springs 09:50:40 -46.1 Dark Up 52.8 184.5 Up 09:35:40 - 10:05:40 -2200
Wildwood 09:50:55 -49.4 Dark Down 55.4 179.7 Up 09:35:55 - 10:05:55 -2270
Henderson 09:50:38 -45.9 Dark Up 53.3 185.7 Up 09:35:38 - 10:05:38 -2273
Searchlight/Boulder City 09:50:39 -46.2 Dark Up 53.9 185.9 Up 09:35:39 - 10:05:39 -2322
Niwot 09:49:58 -37.3 Dark Up 47.7 199.6 Up 09:34:58 - 10:04:58 -2354
SwRI 09:49:59 -37.4 Dark Up 47.8 199.5 Up 09:34:59 - 10:04:59 -2359
Laughlin/Bullhead City 09:50:39 -46.1 Dark Up 54.2 186.5 Up 09:35:39 - 10:05:39 -2361
Patrick 09:50:36 -45.5 Dark Up 53.8 187.6 Up 09:35:36 - 10:05:36 -2372
Kingman/Dolan Springs 09:50:36 -45.7 Dark Up 54.1 187.4 Up 09:35:36 - 10:05:36 -2382
Idyllwild 09:50:49 -48.3 Dark Down 55.7 183.0 Up 09:35:49 - 10:05:49 -2383
Mohave Valley 09:50:39 -46.2 Dark Up 54.4 186.5 Up 09:35:39 - 10:05:39 -2383
Lake Havasu City 09:50:39 -46.3 Dark Up 54.8 187.0 Up 09:35:39 - 10:05:39 -2427
DCO 09:50:33 -45.2 Dark Up 54.1 188.9 Up 09:35:33 - 10:05:33 -2428
Parker 09:50:39 -46.4 Dark Up 55.1 187.2 Up 09:35:39 - 10:05:39 -2457
Calipatria 09:50:45 -47.8 Dark Down 56.3 185.2 Up 09:35:45 - 10:05:45 -2486
Blythe 09:50:41 -46.9 Dark Up 55.7 186.7 Up 09:35:41 - 10:05:41 -2487
Yuma 09:50:43 -47.4 Dark Down 56.6 186.8 Up 09:35:43 - 10:05:43 -2562

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 2019/05/13 23:04:18 UT

Marc W. Buie, Southwest Research Institute

RECON