RECON: TNO occultation with 8405

Event between (8405) Asbolus and star GA1300:03214811 with event index number of 1331005

Geocentric closest approach at 2024/01/11 08:48:25 UTC

J2000 position of star is 05:55:24.1 +41:37:10
Equinox of date position of star is 05:56:47.1 +41:37:17
Stellar brightness G=15.2, use SENSEUP=128
Star is 157 degrees from the moon. Moon is 0% illuminated.
TNO apparent brightness V=23.1

[RECON map]
TNO is 25.0 AU from the Sun and 24.1 AU from the Earth.
The TNO is moving 24.5 km/sec on the sky relative to the star, or, 5.0 arcsec/hr.
The 1-sigma error in the time of the event is 171 seconds.
The 1-sigma cross-track error in the shadow position is 987 km.
The sky-plane scale is 17505.9 km/arcsec.

The TNO has an absolute magnitude Hv=9.1
Diameter=91.2 km assuming a 5% albedo -- 3.7 sec chord
Diameter=37.2 km assuming a 30% albedo -- 1.5 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 

Star training set for 8405, (2024/01/11 08:48UT)
Object            RA         Dec     mag  sep  mel
Pollux         07:46:47.2 +27:57:58  1.1 26.16 175
34Bet Aur      06:01:17.6 +44:56:50  1.9  3.41 155
PPM 048445     05:48:58.0 +42:32:00  6.3  1.76 155
PPM 048560     05:57:38.7 +41:19:31  6.8  0.31 157
PPM 048574     05:58:24.2 +41:44:58  9.1  0.27 157
PPM 048539     05:55:43.5 +41:35:37 10.7  0.26 156
8405           05:57:06.5 +41:37:18 15.2       157
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 22.6 km RECON observability=1.0 and success probability=26.0%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Kelowna 08:46:46 -60.8 Dark Down 65.2 263.5 Up 08:32:01 - 09:01:31 -738
Summerland 08:46:47 -61.1 Dark Down 65.5 263.9 Up 08:32:02 - 09:01:32 -775
Penticton 08:46:46 -61.2 Dark Down 65.4 264.2 Up 08:32:01 - 09:01:31 -780
Okanagan Falls 08:46:46 -61.4 Dark Down 65.4 264.6 Up 08:32:01 - 09:01:31 -800
Oliver 08:46:46 -61.5 Dark Down 65.4 264.9 Up 08:32:01 - 09:01:31 -817
Anarchist Mountain Observatory 08:46:45 -61.6 Dark Down 65.3 265.5 Up 08:32:00 - 09:01:30 -832
Oroville 08:46:45 -61.7 Dark Down 65.4 265.6 Up 08:32:00 - 09:01:30 -842
Tonasket 08:46:45 -61.9 Dark Down 65.4 266.1 Up 08:32:00 - 09:01:30 -866
Okanogan 08:46:45 -62.3 Dark Down 65.5 266.7 Up 08:32:00 - 09:01:30 -905
Brewster 08:46:45 -62.6 Dark Down 65.7 267.1 Up 08:32:00 - 09:01:30 -938
Manson/Chelan 08:46:46 -62.9 Dark Down 65.9 267.3 Up 08:32:01 - 09:01:31 -967
Wenatchee 08:46:46 -63.3 Dark Down 66.0 268.2 Up 08:32:01 - 09:01:31 -1020
Ellensburg 08:46:46 -63.8 Dark Down 66.2 269.0 Up 08:32:01 - 09:01:31 -1069
Yakima 08:46:45 -64.2 Dark Down 66.2 269.9 Up 08:32:00 - 09:01:30 -1113
Pasco 08:46:41 -64.1 Dark Down 65.2 271.6 Up 08:31:56 - 09:01:26 -1123
Toppenish/White Swan 08:46:45 -64.3 Dark Down 66.1 270.5 Up 08:32:00 - 09:01:30 -1133
PNWRO 08:46:40 -64.3 Dark Down 65.1 272.3 Up 08:31:55 - 09:01:25 -1145
George/Umatilla 08:46:41 -64.5 Dark Down 65.4 272.2 Up 08:31:56 - 09:01:26 -1163
Goldendale 08:46:45 -64.9 Dark Down 66.4 271.4 Up 08:32:00 - 09:01:30 -1200
The Dalles 08:46:46 -65.2 Dark Down 66.6 271.7 Up 08:32:01 - 09:01:31 -1231
Maupin 08:46:45 -65.6 Dark Down 66.5 272.8 Up 08:32:00 - 09:01:30 -1274
Madras/Culver 08:46:45 -66.1 Dark Down 66.5 274.0 Up 08:32:00 - 09:01:30 -1334
Redmond 08:46:44 -66.5 Dark Down 66.6 274.8 Up 08:31:59 - 09:01:29 -1373
Sisters 08:46:46 -66.6 Dark Down 66.8 274.5 Up 08:32:01 - 09:01:31 -1378
Bend 08:46:45 -66.7 Dark Down 66.6 275.2 Up 08:32:00 - 09:01:30 -1399
SwRI 08:45:55 -62.5 Dark Down 54.3 288.5 Up 08:31:10 - 09:00:40 -1420
Oregon Observatory 08:46:45 -66.9 Dark Down 66.7 275.5 Up 08:32:00 - 09:01:30 -1420
La Pine/Gilchrist 08:46:45 -67.1 Dark Down 66.7 276.0 Up 08:32:00 - 09:01:30 -1444
North Lake 08:46:43 -67.4 Dark Down 66.3 277.3 Up 08:31:58 - 09:01:28 -1480
Paisley 08:46:41 -67.8 Dark Down 65.9 278.6 Up 08:31:56 - 09:01:26 -1533
Chiloquin 08:46:45 -68.3 Dark Down 66.9 278.4 Up 08:32:00 - 09:01:30 -1570
Lakeview 08:46:40 -68.2 Dark Down 65.7 279.8 Up 08:31:55 - 09:01:25 -1584
Klamath Falls 08:46:44 -68.6 Dark Down 66.7 279.2 Up 08:31:59 - 09:01:29 -1606
Tulelake 08:46:43 -68.7 Dark Down 66.5 279.9 Up 08:31:58 - 09:01:28 -1630
Cedarville 08:46:39 -68.7 Dark Down 65.5 281.3 Up 08:31:54 - 09:01:24 -1651
Fall River/Burney 08:46:42 -69.6 Dark Down 66.3 282.0 Up 08:31:57 - 09:01:27 -1727
Susanville 08:46:39 -69.9 Dark Down 65.6 283.6 Up 08:31:54 - 09:01:24 -1781
Gimple 08:46:40 -70.2 Dark Down 65.7 284.1 Up 08:31:55 - 09:01:25 -1815
Greenville 08:46:40 -70.2 Dark Down 65.7 284.1 Up 08:31:55 - 09:01:25 -1816
Quincy 08:46:40 -70.4 Dark Down 65.7 284.5 Up 08:31:55 - 09:01:25 -1838
Portola 08:46:38 -70.4 Dark Down 65.3 284.9 Up 08:31:53 - 09:01:23 -1843
Reno 08:46:36 -70.4 Dark Down 64.7 285.6 Up 08:31:51 - 09:01:21 -1858
Carson City 08:46:35 -70.7 Dark Down 64.6 286.3 Up 08:31:50 - 09:01:20 -1897
Yerington 08:46:33 -70.6 Dark Down 64.1 286.8 Up 08:31:48 - 09:01:18 -1904
Gardnerville 08:46:35 -70.9 Dark Down 64.5 286.8 Up 08:31:50 - 09:01:20 -1922
Hawthorne 08:46:31 -70.8 Dark Down 63.6 287.8 Up 08:31:46 - 09:01:16 -1943
Tonopah 08:46:27 -70.6 Dark Down 62.4 288.9 Up 08:31:42 - 09:01:12 -1961
Lee Vining 08:46:32 -71.5 Dark Down 63.8 288.8 Up 08:31:47 - 09:01:17 -2014
Bishop 08:46:30 -71.7 Dark Down 63.0 290.0 Up 08:31:45 - 09:01:15 -2062
Beatty 08:46:24 -71.2 Dark Down 61.7 290.9 Up 08:31:39 - 09:01:09 -2074
Indian Springs 08:46:20 -70.9 Dark Down 60.8 291.6 Up 08:31:35 - 09:01:05 -2082
Henderson 08:46:18 -70.9 Dark Down 60.0 292.5 Up 08:31:33 - 09:01:03 -2121
Lone Pine 08:46:28 -72.1 Dark Down 62.5 291.4 Up 08:31:43 - 09:01:13 -2137
Patrick 08:46:14 -70.7 Dark Down 59.0 293.5 Up 08:31:29 - 09:00:59 -2158
Searchlight/Boulder City 08:46:17 -71.3 Dark Down 59.8 293.4 Up 08:31:32 - 09:01:02 -2181
Kingman/Dolan Springs 08:46:14 -70.9 Dark Down 59.0 293.9 Up 08:31:29 - 09:00:59 -2187
Laughlin/Bullhead City 08:46:15 -71.3 Dark Down 59.4 293.9 Up 08:31:30 - 09:01:00 -2203
Mohave Valley 08:46:15 -71.4 Dark Down 59.3 294.3 Up 08:31:30 - 09:01:00 -2232
Lake Havasu City 08:46:14 -71.5 Dark Down 58.9 294.9 Up 08:31:29 - 09:00:59 -2267
Parker 08:46:14 -71.7 Dark Down 58.8 295.4 Up 08:31:29 - 09:00:59 -2304
CPSLO 08:46:35 -74.4 Dark Down 63.9 293.9 Up 08:31:50 - 09:01:20 -2333
Blythe 08:46:14 -72.3 Dark Down 58.8 296.2 Up 08:31:29 - 09:00:59 -2367
Idyllwild 08:46:21 -73.5 Dark Down 60.4 296.2 Up 08:31:36 - 09:01:06 -2410
Wildwood 08:46:27 -74.3 Dark Down 61.9 295.8 Up 08:31:42 - 09:01:12 -2417
Calipatria 08:46:17 -73.2 Dark Down 59.2 297.0 Up 08:31:32 - 09:01:02 -2444
Yuma 08:46:13 -72.8 Dark Down 58.4 297.6 Up 08:31:28 - 09:00:58 -2466

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 8405, (2024/01/11 08:48UT)
Object            RA         Dec     mag  sep  mel
Pollux         07:45:18.0 +28:01:33  1.1 26.16 175
34Bet Aur      05:59:31.6 +44:56:51  1.9  3.41 155
PPM 048445     05:47:14.7 +42:31:35  6.3  1.76 155
PPM 048560     05:55:56.6 +41:19:24  6.8  0.31 157
PPM 048574     05:56:41.7 +41:44:52  9.1  0.27 157
PPM 048539     05:54:01.1 +41:35:26 10.7  0.26 156
8405           05:55:24.1 +41:37:10 15.2       157
Positions are for J2000

Event circumstances last updated at 2019/06/17 20:35:36 UT

Marc W. Buie, Southwest Research Institute

RECON