RECON: TNO occultation with 8405

Event between (8405) Asbolus and star UC4-655-032790 with event index number of 338281

Geocentric closest approach at 2019/11/13 07:52:37 UTC

J2000 position of star is 05:20:15.1 +40:51:49
Equinox of date position of star is 05:21:34.6 +40:52:53
Stellar brightness R=15.9, use SENSEUP=128
Star is 31 degrees from the moon. Moon is 99% illuminated.
TNO apparent brightness V=22.7

[RECON map]
TNO is 22.5 AU from the Sun and 21.7 AU from the Earth.
The TNO is moving 22.1 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 130 seconds.
The 1-sigma cross-track error in the shadow position is 1030 km.
The sky-plane scale is 15761.4 km/arcsec.

The TNO has an absolute magnitude Hv=9.1
Diameter=91.2 km assuming a 5% albedo -- 4.1 sec chord
Diameter=37.2 km assuming a 30% albedo -- 1.7 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 

Star training set for 8405, (2019/11/13 07:53UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:37:03.8 +16:32:52  0.8 26.17  10
34Bet Aur      06:00:59.2 +44:56:50  1.9  8.26  39
PPM 047999     05:21:38.5 +41:06:16  5.5  0.22  31
PPM 048017     05:22:18.4 +40:54:12  7.3  0.13  31
8405           05:21:38.9 +40:52:56 15.9        31
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 25.3 km RECON observability=1.0 and success probability=33.5%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Kelowna 07:54:17 -57.9 Dark Up 68.1 103.3 Up 07:42:56 - 08:05:37 -414
Summerland 07:54:17 -58.0 Dark Up 67.9 102.8 Up 07:42:57 - 08:05:38 -414
Penticton 07:54:17 -58.3 Dark Up 68.0 102.2 Up 07:42:57 - 08:05:38 -451
Okanagan Falls 07:54:17 -58.5 Dark Up 68.1 101.7 Up 07:42:57 - 08:05:38 -472
Oliver 07:54:18 -58.6 Dark Up 68.1 101.4 Up 07:42:57 - 08:05:38 -490
Anarchist Mountain Observatory 07:54:17 -58.8 Dark Up 68.3 101.1 Up 07:42:57 - 08:05:38 -511
Oroville 07:54:18 -58.9 Dark Up 68.2 100.9 Up 07:42:57 - 08:05:38 -518
Tonasket 07:54:18 -59.1 Dark Up 68.3 100.3 Up 07:42:57 - 08:05:38 -543
Okanogan 07:54:19 -59.4 Dark Up 68.2 99.3 Up 07:42:58 - 08:05:39 -578
Brewster 07:54:20 -59.7 Dark Up 68.2 98.5 Up 07:42:59 - 08:05:40 -604
Manson/Chelan 07:54:21 -60.0 Dark Up 67.9 97.6 Up 07:43:00 - 08:05:41 -622
Entiat 07:54:21 -60.2 Dark Up 67.9 97.0 Up 07:43:01 - 08:05:42 -645
Wenatchee 07:54:22 -60.4 Dark Up 67.9 96.3 Up 07:43:01 - 08:05:42 -671
Ellensburg 07:54:23 -60.9 Dark Up 67.8 95.1 Up 07:43:03 - 08:05:44 -713
Yakima 07:54:24 -61.3 Dark Up 67.8 94.1 Up 07:43:03 - 08:05:44 -757
Toppenish/White Swan 07:54:23 -61.5 Dark Up 67.9 93.7 Up 07:43:03 - 08:05:44 -783
Pasco 07:54:19 -61.5 Dark Up 68.8 94.4 Up 07:42:59 - 08:05:40 -814
Goldendale 07:54:25 -62.0 Dark Up 67.7 92.0 Up 07:43:05 - 08:05:46 -837
PNWRO 07:54:19 -61.7 Dark Up 69.0 94.0 Up 07:42:58 - 08:05:39 -844
George/Umatilla 07:54:21 -61.9 Dark Up 68.7 93.4 Up 07:43:00 - 08:05:41 -847
The Dalles 07:54:27 -62.3 Dark Up 67.4 91.2 Up 07:43:06 - 08:05:47 -856
Maupin 07:54:27 -62.7 Dark Up 67.5 90.2 Up 07:43:06 - 08:05:47 -903
Madras/Culver 07:54:27 -63.2 Dark Up 67.5 88.9 Up 07:43:07 - 08:05:48 -962
Sisters 07:54:29 -63.6 Dark Up 67.2 87.8 Up 07:43:08 - 08:05:49 -991
Redmond 07:54:28 -63.6 Dark Up 67.4 88.0 Up 07:43:07 - 08:05:48 -1000
Bend 07:54:28 -63.8 Dark Up 67.3 87.4 Up 07:43:08 - 08:05:49 -1021
Oregon Observatory 07:54:29 -64.0 Dark Up 67.2 86.9 Up 07:43:09 - 08:05:50 -1038
La Pine/Gilchrist 07:54:30 -64.2 Dark Up 67.2 86.4 Up 07:43:09 - 08:05:50 -1059
North Lake 07:54:28 -64.6 Dark Up 67.6 85.7 Up 07:43:07 - 08:05:48 -1116
Chiloquin 07:54:32 -65.3 Dark Up 66.8 83.6 Up 07:43:11 - 08:05:52 -1175
Paisley 07:54:28 -65.2 Dark Up 67.8 84.5 Up 07:43:07 - 08:05:48 -1182
Klamath Falls 07:54:32 -65.7 Dark Up 66.8 82.8 Up 07:43:11 - 08:05:52 -1213
Lakeview 07:54:27 -65.6 Dark Up 67.9 83.4 Up 07:43:07 - 08:05:48 -1240
Tulelake 07:54:31 -65.9 Dark Up 67.0 82.3 Up 07:43:11 - 08:05:52 -1247
Cedarville 07:54:27 -66.3 Dark Up 67.9 81.9 Up 07:43:07 - 08:05:48 -1314
Fall River/Burney 07:54:32 -66.8 Dark Up 66.9 80.2 Up 07:43:11 - 08:05:52 -1348
Susanville 07:54:30 -67.4 Dark Up 67.4 79.0 Up 07:43:09 - 08:05:50 -1428
Greenville 07:54:31 -67.7 Dark Up 67.1 78.3 Up 07:43:11 - 08:05:52 -1454
Gimple 07:54:31 -67.7 Dark Up 67.2 78.3 Up 07:43:10 - 08:05:51 -1455
Quincy 07:54:31 -67.9 Dark Up 67.1 77.8 Up 07:43:11 - 08:05:52 -1476
Portola 07:54:30 -68.0 Dark Up 67.4 77.6 Up 07:43:09 - 08:05:50 -1497
Reno 07:54:28 -68.2 Dark Up 67.8 77.2 Up 07:43:07 - 08:05:48 -1536
Carson City 07:54:28 -68.6 Dark Up 67.8 76.3 Up 07:43:07 - 08:05:48 -1576
Niwot 07:53:34 -63.3 Dark Up 78.8 81.4 Up 07:42:14 - 08:04:55 -1596
Gardnerville 07:54:28 -68.8 Dark Up 67.7 75.7 Up 07:43:07 - 08:05:48 -1603
Yerington 07:54:26 -68.7 Dark Up 68.2 76.0 Up 07:43:05 - 08:05:46 -1607
Hawthorne 07:54:24 -69.1 Dark Up 68.5 74.9 Up 07:43:04 - 08:05:45 -1665
Lee Vining 07:54:26 -69.7 Dark Up 67.9 73.5 Up 07:43:06 - 08:05:47 -1720
Tonopah 07:54:19 -69.3 Dark Up 69.4 73.8 Up 07:42:59 - 08:05:40 -1736
Bishop 07:54:24 -70.2 Dark Up 68.3 72.1 Up 07:43:04 - 08:05:45 -1796
Beatty 07:54:18 -70.3 Dark Up 69.4 70.9 Up 07:42:58 - 08:05:39 -1869
Lone Pine 07:54:23 -70.9 Dark Up 68.3 70.3 Up 07:43:03 - 08:05:44 -1884
Indian Springs 07:54:14 -70.4 Dark Up 70.1 69.9 Up 07:42:54 - 08:05:35 -1918
Henderson 07:54:12 -70.7 Dark Up 70.4 68.4 Up 07:42:52 - 08:05:33 -1985
CPSLO 07:54:34 -72.5 Dark Up 65.9 67.6 Up 07:43:13 - 08:05:54 -1985
Searchlight/Boulder City 07:54:12 -71.2 Dark Up 70.2 66.9 Up 07:42:52 - 08:05:33 -2048
Patrick 07:54:08 -70.9 Dark Up 71.0 66.4 Up 07:42:48 - 08:05:29 -2065
Laughlin/Bullhead City 07:54:11 -71.4 Dark Up 70.4 66.0 Up 07:42:50 - 08:05:31 -2085
Kingman/Dolan Springs 07:54:09 -71.2 Dark Up 70.8 65.9 Up 07:42:49 - 08:05:30 -2088
DCO 07:54:06 -70.9 Dark Up 71.4 65.3 Up 07:42:45 - 08:05:26 -2106
Mohave Valley 07:54:11 -71.6 Dark Up 70.3 65.3 Up 07:42:50 - 08:05:31 -2115
Wildwood 07:54:27 -73.4 Dark Up 67.0 64.7 Up 07:43:06 - 08:05:47 -2149
Lake Havasu City 07:54:10 -71.9 Dark Up 70.3 64.2 Up 07:42:50 - 08:05:31 -2161
Parker 07:54:10 -72.2 Dark Up 70.1 63.3 Up 07:42:50 - 08:05:31 -2200
Idyllwild 07:54:20 -73.3 Dark Up 68.2 63.3 Up 07:42:59 - 08:05:40 -2215
Blythe 07:54:11 -72.8 Dark Up 69.7 62.2 Up 07:42:51 - 08:05:32 -2254
Calipatria 07:54:15 -73.5 Dark Up 68.8 61.5 Up 07:42:55 - 08:05:36 -2297
Yuma 07:54:12 -73.6 Dark Up 69.2 60.0 Up 07:42:52 - 08:05:33 -2354

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, (2019/11/13 07:53UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:35:55.3 +16:30:30  0.8 26.17  10
34Bet Aur      05:59:31.6 +44:56:51  1.9  8.26  39
PPM 047999     05:20:14.6 +41:05:09  5.5  0.22  31
PPM 048017     05:20:54.7 +40:53:05  7.3  0.13  31
8405           05:20:15.1 +40:51:49 15.9        31
Positions are for J2000

Event circumstances last updated at 2018/11/05 21:19:47 UT

Marc W. Buie, Southwest Research Institute

RECON