RECON: TNO occultation with 8405

Event between (8405) Asbolus and star GA1300:02524209 with event index number of 233614

Geocentric closest approach at 2019/12/17 02:20:48 UTC

J2000 position of star is 05:13:31.2 +40:53:18
Equinox of date position of star is 05:14:50.0 +40:54:32
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 112 seconds.
The 1-sigma cross-track error in the shadow position is 954 km.
The sky-plane scale is 15713.6 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 14.3 km RECON observability=1.0 and success probability=2.5%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Rutland 02:23:12 -22.3 Dark Down 37.9 68.7 Up 02:13:23 - 02:33:01 4068
Penticton 02:23:14 -22.2 Dark Down 37.7 68.3 Up 02:13:25 - 02:33:03 4055
Okanagan Falls 02:23:15 -22.1 Dark Down 37.6 68.2 Up 02:13:26 - 02:33:04 4045
Southern Okanagan 02:23:15 -22.1 Dark Down 37.5 68.1 Up 02:13:26 - 02:33:04 4034
Oroville 02:23:16 -22.1 Dark Down 37.5 68.0 Up 02:13:27 - 02:33:05 4013
Tonasket 02:23:17 -22.1 Dark Down 37.4 67.8 Up 02:13:28 - 02:33:06 3999
Okanogan 02:23:18 -21.9 Dark Down 37.2 67.5 Up 02:13:29 - 02:33:07 3986
Manson/Chelan 02:23:20 -21.5 Dark Down 36.7 66.8 Up 02:13:31 - 02:33:09 3985
Brewster 02:23:19 -21.8 Dark Down 37.0 67.2 Up 02:13:30 - 02:33:08 3979
Entiat 02:23:20 -21.4 Dark Down 36.5 66.7 Up 02:13:31 - 02:33:09 3975
Wenatchee 02:23:22 -21.3 Dark Down 36.4 66.4 Up 02:13:33 - 02:33:11 3964
Ellensburg 02:23:23 -21.0 Dark Down 36.1 66.0 Up 02:13:34 - 02:33:12 3950
Yakima 02:23:24 -21.0 Dark Down 35.9 65.8 Up 02:13:35 - 02:33:13 3926
Toppenish/White Swan 02:23:25 -21.0 Dark Down 35.9 65.7 Up 02:13:36 - 02:33:14 3904
The Dalles 02:23:28 -20.3 Dark Down 35.1 64.8 Up 02:13:39 - 02:33:17 3896
Goldendale 02:23:27 -20.6 Dark Down 35.4 65.1 Up 02:13:38 - 02:33:16 3891
Maupin 02:23:29 -20.3 Dark Down 35.0 64.6 Up 02:13:40 - 02:33:18 3865
Sisters 02:23:32 -19.8 Dark Down 34.3 63.8 Up 02:13:43 - 02:33:21 3835
Madras/Culver 02:23:31 -20.2 Dark Down 34.7 64.2 Up 02:13:42 - 02:33:20 3832
Pasco 02:23:25 -21.9 Dark Down 36.7 66.3 Up 02:13:36 - 02:33:14 3832
George/Umatilla 02:23:26 -21.6 Dark Down 36.4 65.9 Up 02:13:37 - 02:33:15 3822
Redmond 02:23:32 -20.0 Dark Down 34.6 64.0 Up 02:13:43 - 02:33:21 3812
Bend 02:23:33 -19.9 Dark Down 34.4 63.8 Up 02:13:44 - 02:33:22 3806
PNWRO 02:23:26 -22.0 Dark Down 36.7 66.2 Up 02:13:37 - 02:33:15 3805
Oregon Observatory 02:23:34 -19.8 Dark Down 34.2 63.6 Up 02:13:45 - 02:33:23 3802
La Pine/Gilchrist 02:23:34 -19.7 Dark Down 34.1 63.5 Up 02:13:45 - 02:33:23 3792
Chiloquin 02:23:38 -19.2 Dark Down 33.4 62.7 Up 02:13:49 - 02:33:27 3740
North Lake 02:23:35 -20.0 Dark Down 34.3 63.5 Up 02:13:46 - 02:33:24 3732
Klamath Falls 02:23:39 -19.1 Dark Down 33.3 62.5 Up 02:13:50 - 02:33:28 3714
Tulelake 02:23:40 -19.3 Dark Down 33.3 62.5 Up 02:13:51 - 02:33:29 3680
Paisley 02:23:37 -20.1 Dark Down 34.3 63.3 Up 02:13:48 - 02:33:26 3677
Lakeview 02:23:38 -20.2 Dark Down 34.2 63.1 Up 02:13:49 - 02:33:27 3633
Fall River/Burney 02:23:42 -19.1 Dark Down 33.0 62.0 Up 02:13:53 - 02:33:31 3616
Cedarville 02:23:40 -20.1 Dark Down 34.0 62.8 Up 02:13:51 - 02:33:29 3580
Susanville 02:23:44 -19.5 Dark Down 33.2 61.9 Up 02:13:55 - 02:33:33 3532
Greenville 02:23:45 -19.2 Dark Down 32.9 61.7 Up 02:13:56 - 02:33:34 3530
Gimple 02:23:44 -19.3 Dark Down 32.9 61.7 Up 02:13:55 - 02:33:33 3525
Quincy 02:23:45 -19.2 Dark Down 32.8 61.5 Up 02:13:56 - 02:33:34 3516
Portola 02:23:45 -19.5 Dark Down 33.0 61.7 Up 02:13:56 - 02:33:34 3481
Reno 02:23:46 -19.9 Dark Down 33.3 61.8 Up 02:13:57 - 02:33:35 3426
Carson City 02:23:47 -19.9 Dark Down 33.2 61.6 Up 02:13:58 - 02:33:36 3400
Gardnerville 02:23:48 -19.8 Dark Down 33.1 61.5 Up 02:13:59 - 02:33:37 3380
Yerington 02:23:47 -20.3 Dark Down 33.5 61.7 Up 02:13:58 - 02:33:36 3351
Hawthorne 02:23:48 -20.6 Dark Down 33.7 61.6 Up 02:13:59 - 02:33:37 3288
Lee Vining 02:23:50 -20.1 Dark Down 33.1 61.1 Up 02:14:01 - 02:33:39 3276
Bishop 02:23:52 -20.5 Dark Down 33.3 61.1 Up 02:14:03 - 02:33:41 3192
CPSLO 02:23:58 -18.2 Dark Down 30.7 59.2 Up 02:14:09 - 02:33:47 3177
Tonopah 02:23:48 -21.6 Dark Down 34.4 61.9 Up 02:13:59 - 02:33:37 3174
Lone Pine 02:23:53 -20.6 Dark Down 33.2 60.7 Up 02:14:04 - 02:33:42 3117
Beatty 02:23:52 -21.6 Dark Down 34.2 61.4 Up 02:14:03 - 02:33:41 3063
Indian Springs 02:23:52 -22.4 Dark Down 34.8 61.5 Up 02:14:03 - 02:33:41 2976
Wildwood 02:24:00 -19.5 Dark Down 31.5 59.2 Up 02:14:11 - 02:33:49 2966
Henderson 02:23:52 -22.8 Dark Down 35.1 61.4 Up 02:14:03 - 02:33:41 2896
Searchlight/Boulder City 02:23:54 -22.8 Dark Down 34.8 61.1 Up 02:14:05 - 02:33:43 2849
Idyllwild 02:24:00 -20.9 Dark Down 32.7 59.6 Up 02:14:11 - 02:33:49 2825
Laughlin/Bullhead City 02:23:54 -23.0 Dark Down 34.9 61.0 Up 02:14:05 - 02:33:43 2806
Mohave Valley 02:23:55 -22.9 Dark Down 34.8 60.9 Up 02:14:06 - 02:33:44 2785
Patrick 02:23:53 -23.6 Dark Down 35.6 61.4 Up 02:14:04 - 02:33:42 2783
Kingman/Dolan Springs 02:23:54 -23.4 Dark Down 35.3 61.2 Up 02:14:05 - 02:33:43 2777
Lake Havasu City 02:23:56 -23.0 Dark Down 34.8 60.7 Up 02:14:07 - 02:33:45 2739
DCO 02:23:53 -24.1 Dark Down 35.9 61.4 Up 02:14:04 - 02:33:42 2718
Parker 02:23:57 -23.0 Dark Down 34.6 60.5 Up 02:14:08 - 02:33:46 2711
Calipatria 02:24:00 -21.7 Dark Down 33.3 59.6 Up 02:14:11 - 02:33:49 2707
Blythe 02:23:58 -22.6 Dark Down 34.2 60.1 Up 02:14:09 - 02:33:47 2688
Niwot 02:23:30 -31.1 Dark Down 43.7 67.7 Up 02:13:41 - 02:33:19 2664
Yuma 02:24:01 -22.4 Dark Down 33.7 59.5 Up 02:14:12 - 02:33:50 2619

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 2018/09/19 18:00:18 UT

Marc W. Buie, Southwest Research Institute

RECON