RECON: TNO occultation with 8405

Event between (8405) Asbolus and star GA1300:02524209 with event index number of 338296

Geocentric closest approach at 2019/12/17 02:21:22 UTC

J2000 position of star is 05:13:31.2 +40:53:18
Equinox of date position of star is 05:14:53.1 +40:54:35
Stellar brightness G=14.8, use SENSEUP=128
Star is 66 degrees from the moon. Moon is 73% 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 120 seconds.
The 1-sigma cross-track error in the shadow position is 976 km.
The sky-plane scale is 15713.5 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, (2019/12/17 02:21UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:37:04.1 +16:32:52  0.8 25.70  78
3Iot Aur       04:58:17.8 +33:11:45  2.7  8.39  70
PPM 047999     05:21:38.9 +41:06:16  5.5  1.28  65
PPM 047827     05:13:38.8 +41:14:16  7.7  0.41  66
PPM 047876     05:15:48.8 +41:07:05  9.1  0.27  66
8405           05:14:55.2 +40:54:37 14.8        66
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 15.2 km RECON observability=1.0 and success probability=3.1%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Kelowna 02:23:46 -22.4 Dark Down 38.0 68.8 Up 02:13:17 - 02:34:14 3981
Summerland 02:23:47 -22.2 Dark Down 37.7 68.4 Up 02:13:19 - 02:34:16 3977
Penticton 02:23:48 -22.3 Dark Down 37.7 68.4 Up 02:13:19 - 02:34:16 3967
Okanagan Falls 02:23:48 -22.2 Dark Down 37.7 68.3 Up 02:13:20 - 02:34:17 3957
Oliver 02:23:48 -22.2 Dark Down 37.6 68.2 Up 02:13:20 - 02:34:17 3946
Anarchist Mountain Observatory 02:23:49 -22.3 Dark Down 37.7 68.1 Up 02:13:20 - 02:34:17 3927
Oroville 02:23:49 -22.2 Dark Down 37.6 68.0 Up 02:13:21 - 02:34:18 3926
Tonasket 02:23:50 -22.2 Dark Down 37.5 67.9 Up 02:13:22 - 02:34:19 3912
Okanogan 02:23:52 -22.0 Dark Down 37.3 67.6 Up 02:13:23 - 02:34:20 3898
Manson/Chelan 02:23:53 -21.6 Dark Down 36.8 66.9 Up 02:13:25 - 02:34:22 3897
Brewster 02:23:53 -21.9 Dark Down 37.1 67.3 Up 02:13:24 - 02:34:21 3892
Wenatchee 02:23:55 -21.4 Dark Down 36.5 66.5 Up 02:13:26 - 02:34:23 3877
Ellensburg 02:23:57 -21.1 Dark Down 36.2 66.1 Up 02:13:28 - 02:34:25 3862
Yakima 02:23:58 -21.0 Dark Down 36.0 65.8 Up 02:13:29 - 02:34:26 3838
Toppenish/White Swan 02:23:59 -21.1 Dark Down 36.0 65.8 Up 02:13:30 - 02:34:27 3816
The Dalles 02:24:01 -20.4 Dark Down 35.2 64.9 Up 02:13:33 - 02:34:30 3808
Goldendale 02:24:01 -20.7 Dark Down 35.5 65.2 Up 02:13:32 - 02:34:29 3803
Maupin 02:24:03 -20.4 Dark Down 35.1 64.7 Up 02:13:34 - 02:34:31 3777
Sisters 02:24:06 -19.9 Dark Down 34.4 63.9 Up 02:13:37 - 02:34:34 3747
Madras/Culver 02:24:05 -20.3 Dark Down 34.8 64.3 Up 02:13:36 - 02:34:33 3744
Pasco 02:23:58 -22.0 Dark Down 36.8 66.4 Up 02:13:30 - 02:34:27 3744
George/Umatilla 02:24:00 -21.7 Dark Down 36.5 66.0 Up 02:13:31 - 02:34:28 3734
Redmond 02:24:06 -20.1 Dark Down 34.7 64.1 Up 02:13:37 - 02:34:34 3724
Bend 02:24:06 -20.0 Dark Down 34.5 63.9 Up 02:13:38 - 02:34:35 3718
PNWRO 02:23:59 -22.1 Dark Down 36.8 66.3 Up 02:13:30 - 02:34:27 3717
Oregon Observatory 02:24:07 -19.9 Dark Down 34.3 63.7 Up 02:13:38 - 02:34:35 3714
La Pine/Gilchrist 02:24:08 -19.8 Dark Down 34.2 63.5 Up 02:13:39 - 02:34:36 3704
Chiloquin 02:24:11 -19.3 Dark Down 33.5 62.7 Up 02:13:43 - 02:34:40 3652
North Lake 02:24:09 -20.1 Dark Down 34.4 63.6 Up 02:13:40 - 02:34:37 3644
Klamath Falls 02:24:12 -19.2 Dark Down 33.4 62.6 Up 02:13:44 - 02:34:41 3625
Tulelake 02:24:13 -19.4 Dark Down 33.4 62.5 Up 02:13:45 - 02:34:42 3591
Paisley 02:24:10 -20.2 Dark Down 34.4 63.4 Up 02:13:42 - 02:34:39 3589
Lakeview 02:24:12 -20.3 Dark Down 34.3 63.2 Up 02:13:43 - 02:34:40 3545
Fall River/Burney 02:24:16 -19.2 Dark Down 33.1 62.0 Up 02:13:47 - 02:34:44 3527
Cedarville 02:24:14 -20.2 Dark Down 34.1 62.9 Up 02:13:45 - 02:34:42 3492
Susanville 02:24:17 -19.6 Dark Down 33.3 62.0 Up 02:13:49 - 02:34:46 3444
Greenville 02:24:18 -19.3 Dark Down 33.0 61.7 Up 02:13:50 - 02:34:47 3442
Gimple 02:24:18 -19.4 Dark Down 33.0 61.8 Up 02:13:50 - 02:34:47 3437
Quincy 02:24:19 -19.3 Dark Down 32.9 61.6 Up 02:13:50 - 02:34:47 3428
Portola 02:24:19 -19.6 Dark Down 33.1 61.7 Up 02:13:51 - 02:34:48 3392
Reno 02:24:19 -20.0 Dark Down 33.4 61.8 Up 02:13:51 - 02:34:48 3337
Carson City 02:24:20 -20.0 Dark Down 33.3 61.6 Up 02:13:52 - 02:34:49 3311
Gardnerville 02:24:21 -19.9 Dark Down 33.2 61.5 Up 02:13:53 - 02:34:50 3292
Yerington 02:24:21 -20.4 Dark Down 33.6 61.8 Up 02:13:52 - 02:34:49 3262
Hawthorne 02:24:22 -20.7 Dark Down 33.8 61.7 Up 02:13:53 - 02:34:50 3199
Lee Vining 02:24:24 -20.2 Dark Down 33.2 61.2 Up 02:13:55 - 02:34:52 3187
Bishop 02:24:25 -20.6 Dark Down 33.4 61.1 Up 02:13:56 - 02:34:53 3103
CPSLO 02:24:32 -18.3 Dark Down 30.8 59.2 Up 02:14:03 - 02:35:00 3088
Tonopah 02:24:22 -21.7 Dark Down 34.5 61.9 Up 02:13:53 - 02:34:50 3085
Lone Pine 02:24:27 -20.7 Dark Down 33.3 60.8 Up 02:13:58 - 02:34:55 3028
Beatty 02:24:25 -21.8 Dark Down 34.3 61.4 Up 02:13:56 - 02:34:53 2974
Indian Springs 02:24:25 -22.5 Dark Down 34.9 61.6 Up 02:13:56 - 02:34:53 2887
Wildwood 02:24:34 -19.6 Dark Down 31.6 59.2 Up 02:14:05 - 02:35:02 2876
Henderson 02:24:26 -22.9 Dark Down 35.2 61.5 Up 02:13:57 - 02:34:54 2807
Searchlight/Boulder City 02:24:27 -22.9 Dark Down 34.9 61.1 Up 02:13:59 - 02:34:56 2760
Idyllwild 02:24:33 -21.0 Dark Down 32.8 59.6 Up 02:14:05 - 02:35:02 2736
Laughlin/Bullhead City 02:24:28 -23.1 Dark Down 35.0 61.1 Up 02:13:59 - 02:34:56 2717
Mohave Valley 02:24:29 -23.0 Dark Down 34.9 60.9 Up 02:14:00 - 02:34:57 2696
Patrick 02:24:26 -23.7 Dark Down 35.7 61.4 Up 02:13:58 - 02:34:55 2694
Kingman/Dolan Springs 02:24:27 -23.5 Dark Down 35.4 61.2 Up 02:13:59 - 02:34:56 2688
Lake Havasu City 02:24:29 -23.1 Dark Down 34.9 60.7 Up 02:14:01 - 02:34:58 2650
Parker 02:24:30 -23.1 Dark Down 34.7 60.5 Up 02:14:02 - 02:34:59 2622
Calipatria 02:24:34 -21.9 Dark Down 33.4 59.6 Up 02:14:05 - 02:35:02 2618
Blythe 02:24:32 -22.7 Dark Down 34.3 60.1 Up 02:14:03 - 02:35:00 2599
SwRI 02:24:04 -31.1 Dark Down 43.7 67.7 Up 02:13:36 - 02:34:33 2573
Yuma 02:24:34 -22.5 Dark Down 33.8 59.6 Up 02:14:05 - 02:35:02 2530

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, (2019/12/17 02:21UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:35:55.3 +16:30:30  0.8 25.70  78
3Iot Aur       04:56:59.6 +33:09:58  2.7  8.39  70
PPM 047999     05:20:14.6 +41:05:09  5.5  1.28  65
PPM 047827     05:12:14.5 +41:12:54  7.7  0.41  66
PPM 047876     05:14:24.6 +41:05:47  9.1  0.27  66
8405           05:13:31.2 +40:53:18 14.8        66
Positions are for J2000

Event circumstances last updated at 2019/06/16 22:03:49 UT

Marc W. Buie, Southwest Research Institute

RECON