RECON: TNO occultation with 8405

Event between (8405) Asbolus and star UC4-655-031366 with event index number of 338295

Geocentric closest approach at 2019/12/16 04:46:29 UTC

J2000 position of star is 05:13:42.4 +40:53:30
Equinox of date position of star is 05:15:01.7 +40:54:44
Stellar brightness R=14.0, use SENSEUP=64
Star is 55 degrees from the moon. Moon is 82% illuminated.
TNO apparent brightness V=22.6

[RECON map]
TNO is 22.6 AU from the Sun and 21.7 AU from the Earth.
The TNO is moving 25.8 km/sec on the sky relative to the star, or, 5.9 arcsec/hr.
The 1-sigma error in the time of the event is 112 seconds.
The 1-sigma cross-track error in the shadow position is 916 km.
The sky-plane scale is 15711.7 km/arcsec.

The TNO has an absolute magnitude Hv=9.1
Diameter=91.2 km assuming a 5% albedo -- 3.5 sec chord
Diameter=37.2 km assuming a 30% albedo -- 1.4 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 

Star training set for 8405, (2019/12/16 04:46UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:37:04.1 +16:32:52  0.8 25.71  65
3Iot Aur       04:58:17.8 +33:11:45  2.7  8.41  58
PPM 047999     05:21:38.9 +41:06:16  5.5  1.25  53
PPM 047827     05:13:38.8 +41:14:16  7.7  0.43  55
PPM 047876     05:15:48.8 +41:07:05  9.1  0.24  54
8405           05:15:06.4 +40:54:49 14.0        54
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 22.3 km RECON observability=1.0 and success probability=47.0%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Summerland 04:48:10 -45.2 Dark Up 59.9 91.2 Up 04:38:20 - 04:58:01 268
Kelowna 04:48:09 -45.4 Dark Up 60.1 91.5 Up 04:38:19 - 04:58:00 259
Penticton 04:48:11 -45.4 Dark Up 60.0 90.8 Up 04:38:20 - 04:58:01 232
Okanagan Falls 04:48:11 -45.5 Dark Up 60.0 90.4 Up 04:38:21 - 04:58:02 216
Oliver 04:48:12 -45.5 Dark Up 60.0 90.1 Up 04:38:21 - 04:58:02 200
Anarchist Mountain Observatory 04:48:12 -45.7 Dark Up 60.1 90.0 Up 04:38:21 - 04:58:02 178
Oroville 04:48:12 -45.7 Dark Up 60.1 89.8 Up 04:38:22 - 04:58:03 174
Tonasket 04:48:12 -45.8 Dark Up 60.1 89.4 Up 04:38:22 - 04:58:03 152
Okanogan 04:48:14 -45.8 Dark Up 60.0 88.7 Up 04:38:23 - 04:58:04 127
Brewster 04:48:15 -45.7 Dark Up 59.9 88.1 Up 04:38:24 - 04:58:05 110
Manson/Chelan 04:48:16 -45.6 Dark Up 59.6 87.5 Up 04:38:25 - 04:58:06 104
Entiat 04:48:16 -45.6 Dark Up 59.5 87.1 Up 04:38:26 - 04:58:07 87
Wenatchee 04:48:17 -45.6 Dark Up 59.5 86.6 Up 04:38:27 - 04:58:08 67
Ellensburg 04:48:19 -45.6 Dark Up 59.3 85.7 Up 04:38:29 - 04:58:10 38
Yakima 04:48:20 -45.7 Dark Up 59.3 85.1 Up 04:38:29 - 04:58:10 2
Toppenish/White Swan 04:48:20 -45.8 Dark Up 59.4 84.8 Up 04:38:29 - 04:58:10 -25
Goldendale 04:48:22 -45.7 Dark Up 59.0 83.6 Up 04:38:32 - 04:58:13 -60
The Dalles 04:48:23 -45.5 Dark Up 58.7 83.0 Up 04:38:33 - 04:58:14 -66
Pasco 04:48:18 -46.7 Dark Up 60.2 85.4 Up 04:38:27 - 04:58:08 -85
George/Umatilla 04:48:19 -46.7 Dark Up 60.0 84.7 Up 04:38:29 - 04:58:10 -108
Maupin 04:48:24 -45.7 Dark Up 58.8 82.4 Up 04:38:34 - 04:58:15 -108
PNWRO 04:48:18 -46.9 Dark Up 60.3 85.1 Up 04:38:27 - 04:58:08 -117
Madras/Culver 04:48:26 -45.8 Dark Up 58.7 81.5 Up 04:38:35 - 04:58:16 -157
Sisters 04:48:27 -45.5 Dark Up 58.3 80.7 Up 04:38:37 - 04:58:18 -170
Redmond 04:48:27 -45.8 Dark Up 58.6 80.9 Up 04:38:36 - 04:58:17 -188
Bend 04:48:27 -45.8 Dark Up 58.4 80.5 Up 04:38:37 - 04:58:18 -202
Oregon Observatory 04:48:28 -45.7 Dark Up 58.3 80.2 Up 04:38:38 - 04:58:19 -213
La Pine/Gilchrist 04:48:29 -45.7 Dark Up 58.2 79.8 Up 04:38:38 - 04:58:19 -229
North Lake 04:48:28 -46.2 Dark Up 58.6 79.4 Up 04:38:38 - 04:58:19 -294
Chiloquin 04:48:32 -45.7 Dark Up 57.8 77.9 Up 04:38:42 - 04:58:23 -317
Klamath Falls 04:48:33 -45.8 Dark Up 57.8 77.4 Up 04:38:42 - 04:58:23 -353
Paisley 04:48:29 -46.6 Dark Up 58.7 78.7 Up 04:38:38 - 04:58:19 -361
Tulelake 04:48:33 -46.1 Dark Up 57.9 77.1 Up 04:38:42 - 04:58:23 -390
Lakeview 04:48:30 -46.8 Dark Up 58.8 77.9 Up 04:38:39 - 04:58:20 -416
Fall River/Burney 04:48:34 -46.3 Dark Up 57.8 75.7 Up 04:38:44 - 04:58:25 -479
Cedarville 04:48:31 -47.1 Dark Up 58.8 76.9 Up 04:38:40 - 04:58:21 -485
Susanville 04:48:34 -46.9 Dark Up 58.2 75.0 Up 04:38:44 - 04:58:25 -570
Greenville 04:48:35 -46.7 Dark Up 57.9 74.5 Up 04:38:45 - 04:58:26 -583
Gimple 04:48:35 -46.8 Dark Up 57.9 74.5 Up 04:38:45 - 04:58:26 -587
Quincy 04:48:36 -46.8 Dark Up 57.8 74.2 Up 04:38:45 - 04:58:26 -602
Portola 04:48:35 -47.1 Dark Up 58.1 74.1 Up 04:38:45 - 04:58:26 -635
Reno 04:48:34 -47.7 Dark Up 58.5 73.9 Up 04:38:43 - 04:58:24 -688
Carson City 04:48:35 -47.7 Dark Up 58.5 73.4 Up 04:38:44 - 04:58:25 -723
Gardnerville 04:48:35 -47.8 Dark Up 58.4 73.0 Up 04:38:45 - 04:58:26 -748
Yerington 04:48:34 -48.3 Dark Up 58.9 73.2 Up 04:38:43 - 04:58:24 -769
Hawthorne 04:48:34 -48.7 Dark Up 59.1 72.6 Up 04:38:43 - 04:58:24 -836
Lee Vining 04:48:36 -48.4 Dark Up 58.6 71.6 Up 04:38:45 - 04:58:26 -869
Tonopah 04:48:31 -49.9 Dark Up 60.0 72.1 Up 04:38:40 - 04:58:21 -941
Bishop 04:48:35 -49.1 Dark Up 58.9 70.8 Up 04:38:45 - 04:58:26 -957
Lone Pine 04:48:36 -49.4 Dark Up 58.9 69.7 Up 04:38:45 - 04:58:26 -1045
CPSLO 04:48:45 -47.5 Dark Up 56.5 67.5 Up 04:38:54 - 04:58:35 -1054
Beatty 04:48:32 -50.4 Dark Up 60.0 70.3 Up 04:38:42 - 04:58:23 -1072
Indian Springs 04:48:30 -51.3 Dark Up 60.7 69.9 Up 04:38:40 - 04:58:21 -1149
Niwot 04:47:55 -58.3 Dark Up 69.5 79.0 Up 04:38:05 - 04:57:46 -1182
Henderson 04:48:29 -51.9 Dark Up 61.0 69.1 Up 04:38:39 - 04:58:20 -1230
Wildwood 04:48:42 -49.2 Dark Up 57.6 65.9 Up 04:38:51 - 04:58:32 -1264
Searchlight/Boulder City 04:48:30 -52.1 Dark Up 60.9 68.1 Up 04:38:40 - 04:58:21 -1290
Laughlin/Bullhead City 04:48:30 -52.4 Dark Up 61.0 67.6 Up 04:38:39 - 04:58:20 -1333
Patrick 04:48:27 -52.9 Dark Up 61.7 68.0 Up 04:38:37 - 04:58:18 -1338
Kingman/Dolan Springs 04:48:28 -52.8 Dark Up 61.4 67.7 Up 04:38:38 - 04:58:19 -1353
Mohave Valley 04:48:30 -52.4 Dark Up 60.9 67.2 Up 04:38:40 - 04:58:21 -1360
Idyllwild 04:48:38 -50.8 Dark Up 58.9 65.4 Up 04:38:47 - 04:58:28 -1383
DCO 04:48:26 -53.5 Dark Up 62.1 67.5 Up 04:38:35 - 04:58:16 -1398
Lake Havasu City 04:48:30 -52.7 Dark Up 61.0 66.5 Up 04:38:40 - 04:58:21 -1410
Parker 04:48:30 -52.7 Dark Up 60.8 65.9 Up 04:38:40 - 04:58:21 -1446
Blythe 04:48:32 -52.5 Dark Up 60.4 65.1 Up 04:38:42 - 04:58:23 -1486
Calipatria 04:48:36 -51.8 Dark Up 59.5 64.4 Up 04:38:45 - 04:58:26 -1494
Yuma 04:48:34 -52.6 Dark Up 60.0 63.6 Up 04:38:43 - 04:58:24 -1575

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, (2019/12/16 04:46UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:35:55.3 +16:30:30  0.8 25.71  65
3Iot Aur       04:56:59.6 +33:09:58  2.7  8.41  58
PPM 047999     05:20:14.6 +41:05:09  5.5  1.25  53
PPM 047827     05:12:14.5 +41:12:54  7.7  0.43  55
PPM 047876     05:14:24.6 +41:05:47  9.1  0.24  54
8405           05:13:42.4 +40:53:30 14.0        55
Positions are for J2000

Event circumstances last updated at 2018/11/05 21:20:44 UT

Marc W. Buie, Southwest Research Institute

RECON