RECON: TNO occultation with 8405

Event between (8405) Asbolus and star GA1300:02664517 with event index number of 338281

Geocentric closest approach at 2019/11/13 07:50:16 UTC

J2000 position of star is 05:20:15.2 +40:51:48
Equinox of date position of star is 05:21:37.2 +40:52:55
Stellar brightness G=15.7, 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 140 seconds.
The 1-sigma cross-track error in the shadow position is 1118 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 07:50UT)
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 15.7        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 26.5 km RECON observability=1.0 and success probability=14.1%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Kelowna 07:51:57 -57.9 Dark Up 67.7 102.6 Up 07:39:49 - 08:04:04 -1616
Summerland 07:51:58 -58.3 Dark Up 67.6 101.6 Up 07:39:51 - 08:04:06 -1645
Penticton 07:51:58 -58.3 Dark Up 67.7 101.6 Up 07:39:50 - 08:04:05 -1653
Okanagan Falls 07:51:58 -58.5 Dark Up 67.7 101.1 Up 07:39:51 - 08:04:06 -1673
Oliver 07:51:58 -58.7 Dark Up 67.7 100.7 Up 07:39:50 - 08:04:05 -1691
Anarchist Mountain Observatory 07:51:58 -58.8 Dark Up 67.9 100.5 Up 07:39:50 - 08:04:05 -1713
Oroville 07:51:58 -58.9 Dark Up 67.9 100.3 Up 07:39:50 - 08:04:05 -1720
Tonasket 07:51:58 -59.1 Dark Up 67.9 99.7 Up 07:39:51 - 08:04:06 -1745
Okanogan 07:51:59 -59.5 Dark Up 67.9 98.7 Up 07:39:52 - 08:04:07 -1779
Brewster 07:52:00 -59.8 Dark Up 67.8 97.9 Up 07:39:52 - 08:04:07 -1806
Manson/Chelan 07:52:01 -60.0 Dark Up 67.6 97.0 Up 07:39:54 - 08:04:09 -1824
Wenatchee 07:52:02 -60.5 Dark Up 67.5 95.7 Up 07:39:55 - 08:04:10 -1872
Ellensburg 07:52:04 -60.9 Dark Up 67.4 94.6 Up 07:39:56 - 08:04:11 -1914
Yakima 07:52:04 -61.3 Dark Up 67.4 93.6 Up 07:39:56 - 08:04:11 -1958
Toppenish/White Swan 07:52:04 -61.5 Dark Up 67.5 93.2 Up 07:39:56 - 08:04:11 -1984
Pasco 07:52:00 -61.6 Dark Up 68.4 93.9 Up 07:39:52 - 08:04:07 -2015
Goldendale 07:52:06 -62.1 Dark Up 67.3 91.5 Up 07:39:58 - 08:04:13 -2038
PNWRO 07:51:59 -61.8 Dark Up 68.6 93.5 Up 07:39:52 - 08:04:07 -2045
George/Umatilla 07:52:01 -61.9 Dark Up 68.3 92.9 Up 07:39:53 - 08:04:08 -2049
The Dalles 07:52:07 -62.3 Dark Up 67.0 90.7 Up 07:40:00 - 08:04:15 -2056
Maupin 07:52:07 -62.7 Dark Up 67.1 89.8 Up 07:39:59 - 08:04:14 -2103
Madras/Culver 07:52:08 -63.3 Dark Up 67.1 88.5 Up 07:40:00 - 08:04:15 -2162
Sisters 07:52:09 -63.6 Dark Up 66.7 87.4 Up 07:40:02 - 08:04:17 -2191
Redmond 07:52:08 -63.6 Dark Up 67.0 87.6 Up 07:40:01 - 08:04:16 -2200
Bend 07:52:09 -63.8 Dark Up 66.9 87.0 Up 07:40:01 - 08:04:16 -2221
Oregon Observatory 07:52:10 -64.0 Dark Up 66.8 86.6 Up 07:40:02 - 08:04:17 -2238
La Pine/Gilchrist 07:52:10 -64.2 Dark Up 66.8 86.0 Up 07:40:03 - 08:04:18 -2259
North Lake 07:52:08 -64.6 Dark Up 67.2 85.4 Up 07:40:01 - 08:04:16 -2316
Chiloquin 07:52:12 -65.3 Dark Up 66.4 83.3 Up 07:40:05 - 08:04:20 -2374
Paisley 07:52:08 -65.2 Dark Up 67.4 84.2 Up 07:40:00 - 08:04:15 -2382
Klamath Falls 07:52:12 -65.7 Dark Up 66.4 82.6 Up 07:40:05 - 08:04:20 -2413
Lakeview 07:52:08 -65.7 Dark Up 67.4 83.1 Up 07:40:00 - 08:04:15 -2440
Tulelake 07:52:11 -65.9 Dark Up 66.6 82.1 Up 07:40:04 - 08:04:19 -2447
Cedarville 07:52:07 -66.3 Dark Up 67.5 81.6 Up 07:40:00 - 08:04:15 -2515
Fall River/Burney 07:52:12 -66.9 Dark Up 66.5 80.0 Up 07:40:05 - 08:04:20 -2547
Susanville 07:52:10 -67.5 Dark Up 66.9 78.8 Up 07:40:02 - 08:04:17 -2628
Greenville 07:52:12 -67.7 Dark Up 66.7 78.1 Up 07:40:04 - 08:04:19 -2654
Gimple 07:52:11 -67.7 Dark Up 66.7 78.1 Up 07:40:04 - 08:04:19 -2655
Quincy 07:52:12 -68.0 Dark Up 66.6 77.7 Up 07:40:04 - 08:04:19 -2676
Portola 07:52:10 -68.1 Dark Up 67.0 77.5 Up 07:40:02 - 08:04:17 -2697
Reno 07:52:08 -68.3 Dark Up 67.4 77.0 Up 07:40:01 - 08:04:16 -2737
Carson City 07:52:08 -68.6 Dark Up 67.3 76.2 Up 07:40:01 - 08:04:16 -2776
Gardnerville 07:52:08 -68.9 Dark Up 67.3 75.6 Up 07:40:01 - 08:04:16 -2804
Yerington 07:52:06 -68.8 Dark Up 67.7 75.9 Up 07:39:58 - 08:04:13 -2808
SwRI 07:51:16 -63.7 Dark Up 78.3 80.8 Up 07:39:08 - 08:03:23 -2816
Hawthorne 07:52:05 -69.2 Dark Up 68.0 74.8 Up 07:39:57 - 08:04:12 -2866
Lee Vining 07:52:07 -69.8 Dark Up 67.5 73.4 Up 07:40:00 - 08:04:15 -2921
Tonopah 07:52:00 -69.4 Dark Up 69.0 73.8 Up 07:39:53 - 08:04:08 -2938
Bishop 07:52:05 -70.3 Dark Up 67.9 72.1 Up 07:39:57 - 08:04:12 -2997
Beatty 07:51:59 -70.5 Dark Up 68.9 70.9 Up 07:39:52 - 08:04:07 -3071
Lone Pine 07:52:04 -71.0 Dark Up 67.9 70.3 Up 07:39:57 - 08:04:12 -3085
Indian Springs 07:51:55 -70.5 Dark Up 69.6 70.0 Up 07:39:48 - 08:04:03 -3120
CPSLO 07:52:14 -72.6 Dark Up 65.5 67.7 Up 07:40:07 - 08:04:22 -3184
Henderson 07:51:53 -70.9 Dark Up 70.0 68.5 Up 07:39:45 - 08:04:00 -3187
Searchlight/Boulder City 07:51:53 -71.4 Dark Up 69.8 67.0 Up 07:39:45 - 08:04:00 -3251
Patrick 07:51:49 -71.1 Dark Up 70.6 66.6 Up 07:39:42 - 08:03:57 -3269
Laughlin/Bullhead City 07:51:52 -71.5 Dark Up 69.9 66.2 Up 07:39:44 - 08:03:59 -3288
Kingman/Dolan Springs 07:51:50 -71.4 Dark Up 70.3 66.1 Up 07:39:42 - 08:03:57 -3291
Mohave Valley 07:51:52 -71.8 Dark Up 69.8 65.5 Up 07:39:45 - 08:04:00 -3318
Wildwood 07:52:08 -73.5 Dark Up 66.5 64.9 Up 07:40:00 - 08:04:15 -3350
Lake Havasu City 07:51:51 -72.1 Dark Up 69.8 64.4 Up 07:39:43 - 08:03:58 -3364
Parker 07:51:51 -72.4 Dark Up 69.7 63.6 Up 07:39:43 - 08:03:58 -3403
Idyllwild 07:52:01 -73.5 Dark Up 67.8 63.5 Up 07:39:53 - 08:04:08 -3417
Blythe 07:51:53 -73.0 Dark Up 69.3 62.4 Up 07:39:45 - 08:04:00 -3457
Calipatria 07:51:56 -73.7 Dark Up 68.3 61.7 Up 07:39:48 - 08:04:03 -3499
Yuma 07:51:53 -73.8 Dark Up 68.8 60.3 Up 07:39:46 - 08:04:01 -3557

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 07:50UT)
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           05:20:15.2 +40:51:48 15.7        31
Positions are for J2000

Event circumstances last updated at 2019/06/16 22:03:29 UT

Marc W. Buie, Southwest Research Institute

RECON