RECON: TNO occultation with 8405

Event between (8405) Asbolus and star UC4-655-032790 with event index number of 225344

Geocentric closest approach at 2019/11/13 07:49:26 UTC

J2000 position of star is 05:20:15.1 +40:51:49
Equinox of date position of star is 05:21:31.5 +40:52:50
Stellar brightness R=15.9, 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 147 seconds.
The 1-sigma cross-track error in the shadow position is 1037 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 07:49UT)
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 15.9        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 26.1 km RECON observability=1.0 and success probability=46.8%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Oroville 07:51:09 -58.9 Dark Up 67.7 100.1 Up 07:38:22 - 08:03:56 828
Tonasket 07:51:09 -59.1 Dark Up 67.8 99.5 Up 07:38:22 - 08:03:56 802
Okanogan 07:51:10 -59.5 Dark Up 67.7 98.5 Up 07:38:23 - 08:03:57 768
Brewster 07:51:10 -59.8 Dark Up 67.6 97.7 Up 07:38:23 - 08:03:57 741
Manson/Chelan 07:51:12 -60.0 Dark Up 67.4 96.8 Up 07:38:25 - 08:03:59 724
Entiat 07:51:12 -60.2 Dark Up 67.4 96.3 Up 07:38:25 - 08:03:59 701
Wenatchee 07:51:13 -60.5 Dark Up 67.4 95.6 Up 07:38:26 - 08:04:00 675
Ellensburg 07:51:14 -60.9 Dark Up 67.2 94.4 Up 07:38:27 - 08:04:01 633
Yakima 07:51:15 -61.3 Dark Up 67.3 93.4 Up 07:38:28 - 08:04:02 590
Toppenish/White Swan 07:51:14 -61.5 Dark Up 67.4 93.0 Up 07:38:27 - 08:04:01 564
Pasco 07:51:10 -61.6 Dark Up 68.3 93.8 Up 07:38:23 - 08:03:57 532
Goldendale 07:51:16 -62.1 Dark Up 67.1 91.4 Up 07:38:29 - 08:04:03 510
PNWRO 07:51:10 -61.8 Dark Up 68.4 93.3 Up 07:38:23 - 08:03:57 502
George/Umatilla 07:51:11 -61.9 Dark Up 68.1 92.7 Up 07:38:24 - 08:03:58 499
The Dalles 07:51:18 -62.3 Dark Up 66.9 90.6 Up 07:38:31 - 08:04:05 491
Maupin 07:51:18 -62.7 Dark Up 67.0 89.7 Up 07:38:31 - 08:04:05 444
Madras/Culver 07:51:18 -63.3 Dark Up 66.9 88.4 Up 07:38:31 - 08:04:05 386
Sisters 07:51:20 -63.6 Dark Up 66.6 87.3 Up 07:38:33 - 08:04:07 357
Redmond 07:51:19 -63.6 Dark Up 66.9 87.5 Up 07:38:32 - 08:04:06 348
Bend 07:51:20 -63.8 Dark Up 66.8 86.9 Up 07:38:33 - 08:04:07 327
Oregon Observatory 07:51:21 -64.0 Dark Up 66.7 86.4 Up 07:38:34 - 08:04:08 310
La Pine/Gilchrist 07:51:21 -64.2 Dark Up 66.6 85.9 Up 07:38:34 - 08:04:08 289
North Lake 07:51:19 -64.6 Dark Up 67.0 85.2 Up 07:38:32 - 08:04:06 232
Chiloquin 07:51:23 -65.3 Dark Up 66.2 83.2 Up 07:38:36 - 08:04:10 174
Paisley 07:51:19 -65.2 Dark Up 67.2 84.1 Up 07:38:32 - 08:04:06 166
Klamath Falls 07:51:23 -65.7 Dark Up 66.3 82.5 Up 07:38:36 - 08:04:10 135
Lakeview 07:51:18 -65.7 Dark Up 67.3 83.0 Up 07:38:31 - 08:04:05 107
Tulelake 07:51:22 -65.9 Dark Up 66.4 82.0 Up 07:38:35 - 08:04:09 101
Cedarville 07:51:18 -66.3 Dark Up 67.3 81.5 Up 07:38:31 - 08:04:05 33
Fall River/Burney 07:51:23 -66.9 Dark Up 66.4 80.0 Up 07:38:36 - 08:04:10 -4
Susanville 07:51:21 -67.5 Dark Up 66.8 78.8 Up 07:38:34 - 08:04:08 -81
Greenville 07:51:22 -67.8 Dark Up 66.5 78.1 Up 07:38:35 - 08:04:09 -106
Gimple 07:51:22 -67.8 Dark Up 66.6 78.1 Up 07:38:35 - 08:04:09 -107
Quincy 07:51:22 -68.0 Dark Up 66.5 77.6 Up 07:38:35 - 08:04:09 -128
Portola 07:51:21 -68.1 Dark Up 66.8 77.4 Up 07:38:34 - 08:04:08 -149
Reno 07:51:19 -68.3 Dark Up 67.2 77.0 Up 07:38:32 - 08:04:06 -189
Carson City 07:51:19 -68.6 Dark Up 67.2 76.2 Up 07:38:32 - 08:04:06 -229
Gardnerville 07:51:19 -68.9 Dark Up 67.1 75.6 Up 07:38:32 - 08:04:06 -256
Niwot 07:50:26 -63.7 Dark Up 78.2 81.3 Up 07:37:39 - 08:03:13 -259
Yerington 07:51:17 -68.8 Dark Up 67.6 75.8 Up 07:38:30 - 08:04:04 -260
Hawthorne 07:51:16 -69.2 Dark Up 67.9 74.8 Up 07:38:29 - 08:04:03 -319
Lee Vining 07:51:18 -69.8 Dark Up 67.4 73.4 Up 07:38:31 - 08:04:05 -373
Tonopah 07:51:11 -69.5 Dark Up 68.8 73.8 Up 07:38:24 - 08:03:58 -390
Bishop 07:51:16 -70.3 Dark Up 67.7 72.1 Up 07:38:29 - 08:04:03 -449
Beatty 07:51:10 -70.5 Dark Up 68.8 70.9 Up 07:38:23 - 08:03:57 -523
Lone Pine 07:51:15 -71.0 Dark Up 67.7 70.3 Up 07:38:28 - 08:04:02 -537
Indian Springs 07:51:06 -70.6 Dark Up 69.5 70.0 Up 07:38:19 - 08:03:53 -573
CPSLO 07:51:25 -72.6 Dark Up 65.3 67.7 Up 07:38:38 - 08:04:12 -636
Henderson 07:51:04 -70.9 Dark Up 69.8 68.5 Up 07:38:17 - 08:03:51 -640
Searchlight/Boulder City 07:51:04 -71.4 Dark Up 69.6 67.1 Up 07:38:17 - 08:03:51 -704
Patrick 07:51:00 -71.2 Dark Up 70.4 66.6 Up 07:38:13 - 08:03:47 -722
Laughlin/Bullhead City 07:51:03 -71.6 Dark Up 69.8 66.3 Up 07:38:16 - 08:03:50 -741
Kingman/Dolan Springs 07:51:00 -71.4 Dark Up 70.2 66.1 Up 07:38:13 - 08:03:47 -744
DCO 07:50:57 -71.2 Dark Up 70.8 65.6 Up 07:38:10 - 08:03:44 -763
Mohave Valley 07:51:03 -71.9 Dark Up 69.7 65.6 Up 07:38:16 - 08:03:50 -771
Wildwood 07:51:18 -73.6 Dark Up 66.4 64.9 Up 07:38:31 - 08:04:05 -802
Lake Havasu City 07:51:02 -72.1 Dark Up 69.7 64.5 Up 07:38:15 - 08:03:49 -817
Parker 07:51:02 -72.5 Dark Up 69.6 63.6 Up 07:38:15 - 08:03:49 -856
Idyllwild 07:51:11 -73.5 Dark Up 67.6 63.6 Up 07:38:24 - 08:03:58 -869
Blythe 07:51:03 -73.0 Dark Up 69.1 62.5 Up 07:38:16 - 08:03:50 -910
Calipatria 07:51:07 -73.8 Dark Up 68.2 61.8 Up 07:38:20 - 08:03:54 -952
Yuma 07:51:04 -73.9 Dark Up 68.6 60.4 Up 07:38:17 - 08:03:51 -1010

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 07:49UT)
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           05:20:15.1 +40:51:49 15.9        31
Positions are for J2000

Event circumstances last updated at 2018/02/15 18:07:06 UT

Marc W. Buie, Southwest Research Institute

RECON