RECON: TNO occultation with 8405

Event between (8405) Asbolus and star GA1300:02528475 with event index number of 233613

Geocentric closest approach at 2019/12/16 04:47:04 UTC

J2000 position of star is 05:13:42.4 +40:53:29
Equinox of date position of star is 05:15:01.1 +40:54:44
Stellar brightness G=14.1, 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 139 seconds.
The 1-sigma cross-track error in the shadow position is 963 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 04:47UT)
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 +40:54:48 14.1        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 22.7 km RECON observability=1.0 and success probability=3.6%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Rutland 04:48:43 -45.5 Dark Up 60.2 91.6 Up 04:36:39 - 05:00:46 -2439
Penticton 04:48:44 -45.5 Dark Up 60.1 90.9 Up 04:36:40 - 05:00:47 -2466
Okanagan Falls 04:48:44 -45.6 Dark Up 60.1 90.5 Up 04:36:41 - 05:00:48 -2482
Southern Okanagan 04:48:45 -45.6 Dark Up 60.1 90.3 Up 04:36:41 - 05:00:48 -2498
Oroville 04:48:45 -45.8 Dark Up 60.2 89.9 Up 04:36:42 - 05:00:49 -2524
Tonasket 04:48:46 -45.9 Dark Up 60.2 89.5 Up 04:36:42 - 05:00:49 -2546
Okanogan 04:48:47 -45.9 Dark Up 60.1 88.8 Up 04:36:43 - 05:00:50 -2571
Brewster 04:48:48 -45.8 Dark Up 59.9 88.2 Up 04:36:44 - 05:00:51 -2589
Manson/Chelan 04:48:49 -45.7 Dark Up 59.7 87.6 Up 04:36:46 - 05:00:53 -2594
Entiat 04:48:50 -45.7 Dark Up 59.6 87.2 Up 04:36:46 - 05:00:53 -2611
Wenatchee 04:48:51 -45.7 Dark Up 59.6 86.7 Up 04:36:47 - 05:00:54 -2631
Ellensburg 04:48:52 -45.7 Dark Up 59.4 85.8 Up 04:36:48 - 05:00:55 -2661
Yakima 04:48:53 -45.8 Dark Up 59.3 85.1 Up 04:36:49 - 05:00:56 -2697
Toppenish/White Swan 04:48:53 -45.9 Dark Up 59.4 84.9 Up 04:36:50 - 05:00:57 -2724
Goldendale 04:48:55 -45.8 Dark Up 59.1 83.7 Up 04:36:52 - 05:00:59 -2758
The Dalles 04:48:57 -45.6 Dark Up 58.8 83.1 Up 04:36:53 - 05:01:00 -2764
Pasco 04:48:51 -46.8 Dark Up 60.3 85.5 Up 04:36:47 - 05:00:54 -2784
George/Umatilla 04:48:52 -46.8 Dark Up 60.1 84.7 Up 04:36:48 - 05:00:55 -2806
Maupin 04:48:58 -45.8 Dark Up 58.9 82.5 Up 04:36:54 - 05:01:01 -2807
PNWRO 04:48:51 -47.0 Dark Up 60.4 85.2 Up 04:36:47 - 05:00:54 -2815
Madras/Culver 04:48:59 -45.9 Dark Up 58.7 81.6 Up 04:36:55 - 05:01:02 -2856
Sisters 04:49:01 -45.6 Dark Up 58.4 80.8 Up 04:36:57 - 05:01:04 -2868
Redmond 04:49:00 -45.9 Dark Up 58.7 81.0 Up 04:36:56 - 05:01:03 -2887
Bend 04:49:01 -45.9 Dark Up 58.5 80.6 Up 04:36:57 - 05:01:04 -2901
Oregon Observatory 04:49:01 -45.8 Dark Up 58.4 80.2 Up 04:36:58 - 05:01:05 -2912
La Pine/Gilchrist 04:49:01 -45.8 Dark Up 58.3 79.9 Up 04:36:58 - 05:01:05 -2928
North Lake 04:49:01 -46.3 Dark Up 58.7 79.5 Up 04:36:58 - 05:01:05 -2993
Chiloquin 04:49:05 -45.8 Dark Up 57.9 78.0 Up 04:37:02 - 05:01:09 -3016
Klamath Falls 04:49:05 -45.9 Dark Up 57.9 77.5 Up 04:37:02 - 05:01:09 -3051
Paisley 04:49:02 -46.7 Dark Up 58.8 78.7 Up 04:36:58 - 05:01:05 -3059
Tulelake 04:49:05 -46.2 Dark Up 58.0 77.2 Up 04:37:02 - 05:01:09 -3089
Lakeview 04:49:03 -46.9 Dark Up 58.9 78.0 Up 04:36:59 - 05:01:06 -3115
Fall River/Burney 04:49:08 -46.4 Dark Up 57.9 75.8 Up 04:37:04 - 05:01:11 -3178
Cedarville 04:49:04 -47.2 Dark Up 58.9 77.0 Up 04:37:00 - 05:01:07 -3184
Susanville 04:49:07 -47.0 Dark Up 58.3 75.1 Up 04:37:04 - 05:01:11 -3269
Greenville 04:49:09 -46.8 Dark Up 58.0 74.5 Up 04:37:05 - 05:01:12 -3282
Gimple 04:49:08 -46.9 Dark Up 58.0 74.6 Up 04:37:05 - 05:01:12 -3286
Quincy 04:49:09 -46.9 Dark Up 57.9 74.2 Up 04:37:05 - 05:01:12 -3301
Portola 04:49:08 -47.3 Dark Up 58.2 74.2 Up 04:37:05 - 05:01:12 -3334
Reno 04:49:07 -47.8 Dark Up 58.6 74.0 Up 04:37:04 - 05:01:11 -3387
Carson City 04:49:08 -47.9 Dark Up 58.6 73.4 Up 04:37:05 - 05:01:12 -3422
Gardnerville 04:49:09 -47.9 Dark Up 58.5 73.0 Up 04:37:05 - 05:01:12 -3447
Yerington 04:49:07 -48.4 Dark Up 59.0 73.3 Up 04:37:03 - 05:01:10 -3467
Hawthorne 04:49:06 -48.8 Dark Up 59.2 72.6 Up 04:37:03 - 05:01:10 -3535
Lee Vining 04:49:09 -48.5 Dark Up 58.7 71.6 Up 04:37:05 - 05:01:12 -3568
Tonopah 04:49:04 -50.0 Dark Up 60.1 72.2 Up 04:37:01 - 05:01:08 -3639
Bishop 04:49:08 -49.2 Dark Up 59.0 70.8 Up 04:37:05 - 05:01:12 -3656
Lone Pine 04:49:09 -49.5 Dark Up 59.0 69.7 Up 04:37:05 - 05:01:12 -3744
CPSLO 04:49:18 -47.6 Dark Up 56.6 67.5 Up 04:37:14 - 05:01:21 -3753
Beatty 04:49:05 -50.5 Dark Up 60.1 70.3 Up 04:37:02 - 05:01:09 -3771
Indian Springs 04:49:03 -51.4 Dark Up 60.8 69.9 Up 04:36:59 - 05:01:06 -3848
Niwot 04:48:29 -58.4 Dark Up 69.6 79.0 Up 04:36:25 - 05:00:32 -3879
Henderson 04:49:02 -52.0 Dark Up 61.1 69.1 Up 04:36:58 - 05:01:05 -3929
Wildwood 04:49:15 -49.3 Dark Up 57.7 65.9 Up 04:37:12 - 05:01:19 -3963
Searchlight/Boulder City 04:49:03 -52.2 Dark Up 61.0 68.1 Up 04:36:59 - 05:01:06 -3988
Laughlin/Bullhead City 04:49:02 -52.5 Dark Up 61.1 67.6 Up 04:36:59 - 05:01:06 -4032
Patrick 04:49:00 -53.0 Dark Up 61.8 68.1 Up 04:36:57 - 05:01:04 -4037
Kingman/Dolan Springs 04:49:01 -52.9 Dark Up 61.5 67.7 Up 04:36:58 - 05:01:05 -4051
Mohave Valley 04:49:03 -52.5 Dark Up 61.0 67.2 Up 04:36:59 - 05:01:06 -4059
Idyllwild 04:49:10 -50.9 Dark Up 59.0 65.4 Up 04:37:07 - 05:01:14 -4082
DCO 04:48:59 -53.6 Dark Up 62.2 67.5 Up 04:36:55 - 05:01:02 -4096
Lake Havasu City 04:49:03 -52.8 Dark Up 61.1 66.5 Up 04:37:00 - 05:01:07 -4109
Parker 04:49:03 -52.8 Dark Up 61.0 65.9 Up 04:37:00 - 05:01:07 -4145
Blythe 04:49:05 -52.7 Dark Up 60.5 65.1 Up 04:37:02 - 05:01:09 -4184
Calipatria 04:49:09 -51.9 Dark Up 59.6 64.4 Up 04:37:05 - 05:01:12 -4193
Yuma 04:49:07 -52.7 Dark Up 60.1 63.6 Up 04:37:03 - 05:01:10 -4274

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 04:47UT)
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 +40:53:29 14.1        55
Positions are for J2000

Event circumstances last updated at 2018/09/18 16:39:31 UT

Marc W. Buie, Southwest Research Institute

RECON