RECON: TNO occultation with 8405

Event between (8405) Asbolus and star GA1300:03053011 with event index number of 1146967

Geocentric closest approach at 2021/11/19 10:19:53 UTC

J2000 position of star is 05:43:05.2 +41:22:26
Equinox of date position of star is 05:44:27.8 +41:22:54
Stellar brightness G=14.6, use SENSEUP=128
Star is 34 degrees from the moon. Moon is 100% illuminated.
TNO apparent brightness V=22.9

[RECON map]
TNO is 23.8 AU from the Sun and 23.0 AU from the Earth.
The TNO is moving 22.7 km/sec on the sky relative to the star, or, 4.9 arcsec/hr.
The 1-sigma error in the time of the event is 160 seconds.
The 1-sigma cross-track error in the shadow position is 1159 km.
The sky-plane scale is 16678.1 km/arcsec.

The TNO has an absolute magnitude Hv=9.1
Diameter=91.2 km assuming a 5% albedo -- 4.0 sec chord
Diameter=37.2 km assuming a 30% albedo -- 1.6 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 

Star training set for 8405, (2021/11/19 10:20UT)
Object            RA         Dec     mag  sep  mel
Pollux         07:46:39.2 +27:58:18  1.1 28.24  56
34Bet Aur      06:01:08.1 +44:56:50  1.9  4.66  38
PPM 048445     05:48:48.8 +42:31:58  6.3  1.39  35
PPM 048385     05:44:49.9 +41:07:53  7.1  0.25  34
PPM 048390     05:45:04.5 +41:28:02 10.2  0.12  34
8405           05:44:38.1 +41:22:57 14.6        34
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 22.4 km RECON observability=1.0 and success probability=30.2%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Kelowna 10:19:35 -46.6 Dark Up 79.7 217.7 Up 10:05:47 - 10:33:23 -417
Summerland 10:19:36 -46.9 Dark Up 80.0 217.7 Up 10:05:48 - 10:33:24 -454
Penticton 10:19:35 -46.9 Dark Up 80.0 218.3 Up 10:05:47 - 10:33:23 -459
Okanagan Falls 10:19:35 -47.0 Dark Up 80.2 218.9 Up 10:05:47 - 10:33:23 -480
Oliver 10:19:35 -47.1 Dark Up 80.3 219.6 Up 10:05:47 - 10:33:23 -497
Anarchist Mountain Observatory 10:19:34 -47.0 Dark Up 80.3 221.0 Up 10:05:46 - 10:33:22 -511
Oroville 10:19:34 -47.1 Dark Up 80.4 221.0 Up 10:05:46 - 10:33:22 -520
Tonasket 10:19:34 -47.2 Dark Up 80.6 221.9 Up 10:05:46 - 10:33:22 -545
Okanogan 10:19:34 -47.5 Dark Up 80.9 222.7 Up 10:05:46 - 10:33:22 -584
Brewster 10:19:34 -47.7 Dark Up 81.2 223.1 Up 10:05:46 - 10:33:22 -616
Manson/Chelan 10:19:35 -48.0 Dark Up 81.5 222.6 Up 10:05:47 - 10:33:23 -646
Wenatchee 10:19:35 -48.4 Dark Up 82.0 224.2 Up 10:05:47 - 10:33:23 -700
Ellensburg 10:19:35 -48.7 Dark Up 82.3 225.3 Up 10:05:47 - 10:33:23 -748
Yakima 10:19:35 -48.9 Dark Up 82.6 227.5 Up 10:05:47 - 10:33:23 -792
Pasco 10:19:30 -48.2 Dark Up 82.1 235.1 Up 10:05:42 - 10:33:18 -799
Toppenish/White Swan 10:19:34 -48.9 Dark Up 82.7 229.5 Up 10:05:46 - 10:33:22 -812
PNWRO 10:19:29 -48.1 Dark Up 82.1 237.3 Up 10:05:41 - 10:33:17 -821
George/Umatilla 10:19:30 -48.5 Dark Up 82.4 236.3 Up 10:05:42 - 10:33:18 -839
Goldendale 10:19:35 -49.4 Dark Up 83.3 231.1 Up 10:05:47 - 10:33:23 -879
The Dalles 10:19:36 -49.7 Dark Up 83.6 231.0 Up 10:05:48 - 10:33:24 -910
Maupin 10:19:35 -49.9 Dark Up 83.8 234.5 Up 10:05:47 - 10:33:23 -953
Madras/Culver 10:19:34 -50.1 Dark Up 84.1 238.6 Up 10:05:46 - 10:33:22 -1013
Redmond 10:19:34 -50.3 Dark Up 84.3 241.4 Up 10:05:46 - 10:33:22 -1052
Sisters 10:19:35 -50.6 Dark Up 84.6 239.5 Up 10:05:47 - 10:33:23 -1057
SwRI 10:18:34 -40.5 Dark Up 73.1 281.9 Up 10:04:46 - 10:32:22 -1070
Bend 10:19:34 -50.5 Dark Up 84.5 242.8 Up 10:05:46 - 10:33:22 -1078
Oregon Observatory 10:19:34 -50.7 Dark Up 84.7 243.9 Up 10:05:46 - 10:33:22 -1099
La Pine/Gilchrist 10:19:34 -50.8 Dark Up 84.8 245.7 Up 10:05:46 - 10:33:22 -1122
North Lake 10:19:32 -50.6 Dark Up 84.6 252.2 Up 10:05:44 - 10:33:20 -1157
Paisley 10:19:30 -50.6 Dark Up 84.5 258.6 Up 10:05:42 - 10:33:18 -1209
Chiloquin 10:19:34 -51.5 Dark Up 85.4 256.8 Up 10:05:46 - 10:33:22 -1249
Lakeview 10:19:29 -50.7 Dark Up 84.4 264.1 Up 10:05:41 - 10:33:17 -1260
Klamath Falls 10:19:34 -51.6 Dark Up 85.4 261.3 Up 10:05:46 - 10:33:22 -1285
Tulelake 10:19:32 -51.5 Dark Up 85.3 265.1 Up 10:05:44 - 10:33:20 -1308
Cedarville 10:19:27 -50.8 Dark Up 84.3 271.0 Up 10:05:39 - 10:33:15 -1327
Fall River/Burney 10:19:31 -51.8 Dark Up 85.2 276.0 Up 10:05:43 - 10:33:19 -1404
Susanville 10:19:28 -51.6 Dark Up 84.5 282.4 Up 10:05:40 - 10:33:16 -1456
Gimple 10:19:28 -51.8 Dark Up 84.6 285.5 Up 10:05:40 - 10:33:16 -1491
Greenville 10:19:28 -51.9 Dark Up 84.7 285.7 Up 10:05:40 - 10:33:16 -1492
Quincy 10:19:28 -52.0 Dark Up 84.6 287.7 Up 10:05:40 - 10:33:16 -1514
Portola 10:19:26 -51.7 Dark Up 84.2 288.1 Up 10:05:38 - 10:33:14 -1517
Reno 10:19:24 -51.3 Dark Up 83.7 289.4 Up 10:05:36 - 10:33:12 -1532
Carson City 10:19:23 -51.4 Dark Up 83.6 292.4 Up 10:05:35 - 10:33:11 -1570
Yerington 10:19:21 -51.0 Dark Up 83.0 292.7 Up 10:05:33 - 10:33:09 -1576
Gardnerville 10:19:23 -51.4 Dark Up 83.4 294.3 Up 10:05:35 - 10:33:11 -1595
Hawthorne 10:19:18 -50.8 Dark Up 82.5 295.1 Up 10:05:30 - 10:33:06 -1614
Tonopah 10:19:13 -49.8 Dark Up 81.3 295.6 Up 10:05:25 - 10:33:01 -1629
Lee Vining 10:19:19 -51.3 Dark Up 82.6 300.0 Up 10:05:31 - 10:33:07 -1686
Bishop 10:19:16 -50.9 Dark Up 81.8 302.0 Up 10:05:28 - 10:33:04 -1732
Beatty 10:19:09 -49.8 Dark Up 80.4 301.2 Up 10:05:21 - 10:32:57 -1740
Indian Springs 10:19:05 -49.0 Dark Up 79.5 300.9 Up 10:05:17 - 10:32:53 -1747
Henderson 10:19:01 -48.6 Dark Up 78.8 302.2 Up 10:05:13 - 10:32:49 -1784
Lone Pine 10:19:14 -50.9 Dark Up 81.1 305.4 Up 10:05:26 - 10:33:02 -1805
Patrick 10:18:57 -47.9 Dark Up 77.7 303.1 Up 10:05:09 - 10:32:45 -1818
Searchlight/Boulder City 10:19:00 -48.7 Dark Up 78.4 304.5 Up 10:05:12 - 10:32:48 -1843
Kingman/Dolan Springs 10:18:57 -48.0 Dark Up 77.7 304.2 Up 10:05:09 - 10:32:45 -1847
Laughlin/Bullhead City 10:18:59 -48.5 Dark Up 78.0 305.1 Up 10:05:11 - 10:32:47 -1864
Mohave Valley 10:18:59 -48.5 Dark Up 77.9 306.1 Up 10:05:11 - 10:32:47 -1893
Lake Havasu City 10:18:57 -48.4 Dark Up 77.5 307.2 Up 10:05:09 - 10:32:45 -1928
Parker 10:18:56 -48.4 Dark Up 77.2 308.4 Up 10:05:08 - 10:32:44 -1964
CPSLO 10:19:21 -53.2 Dark Up 81.8 319.7 Up 10:05:33 - 10:33:09 -2005
Blythe 10:18:57 -48.7 Dark Up 77.1 310.7 Up 10:05:09 - 10:32:45 -2028
Idyllwild 10:19:05 -50.4 Dark Up 78.4 314.6 Up 10:05:17 - 10:32:53 -2075
Wildwood 10:19:12 -51.9 Dark Up 79.8 318.0 Up 10:05:24 - 10:33:00 -2085
Calipatria 10:19:00 -49.6 Dark Up 77.3 314.1 Up 10:05:12 - 10:32:48 -2106
Yuma 10:18:55 -48.9 Dark Up 76.5 313.7 Up 10:05:07 - 10:32:43 -2126

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, (2021/11/19 10:20UT)
Object            RA         Dec     mag  sep  mel
Pollux         07:45:18.0 +28:01:33  1.1 28.24  56
34Bet Aur      05:59:31.6 +44:56:51  1.9  4.66  38
PPM 048445     05:47:14.7 +42:31:35  6.3  1.39  35
PPM 048385     05:43:17.1 +41:07:23  7.1  0.25  34
PPM 048390     05:43:31.4 +41:27:32 10.2  0.12  34
8405           05:43:05.2 +41:22:26 14.6        34
Positions are for J2000

Event circumstances last updated at 2019/06/16 22:10:48 UT

Marc W. Buie, Southwest Research Institute

RECON