RECON: TNO occultation with 15BF519

Event between 15BF519 and star GA0780:04024321 with event index number of 300764

Geocentric closest approach at 2019/12/27 09:53:00 UTC

J2000 position of star is 10:51:58.7 -10:25:03
Equinox of date position of star is 10:52:55.1 -10:31:02
Stellar brightness G=12.5, use SENSEUP=16
Star is 120 degrees from the moon. Moon is 2% illuminated.
TNO apparent brightness V=22.3

[RECON map]
TNO is 27.4 AU from the Sun and 27.1 AU from the Earth.
The TNO is moving 9.6 km/sec on the sky relative to the star, or, 1.7 arcsec/hr.
The 1-sigma error in the time of the event is 154 seconds.
The 1-sigma cross-track error in the shadow position is 1363 km.
The sky-plane scale is 19677.1 km/arcsec.

The TNO has an absolute magnitude Hv=7.7
Diameter=177.8 km assuming a 5% albedo -- 18.6 sec chord
Diameter=72.6 km assuming a 30% albedo -- 7.6 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 

Star training set for 15BF519, (2019/12/27 09:53UT)
Object            RA         Dec     mag  sep  mel
Regulus        10:09:26.1 +11:52:08  1.3 24.87 140
Alphard        09:28:34.2 -08:44:46  2.0 20.88 137
PPM 193828     10:50:43.6 -09:57:32  5.5  0.79 120
PPM 223518     10:50:49.6 -10:21:30  8.5  0.55 120
PPM 223558     10:52:31.2 -10:31:30  9.5  0.11 120
15BF519        10:52:58.8 -10:31:26 12.5       119
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 3.6 km RECON observability=1.0 and success probability=16.0%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Chiloquin 09:49:37 -61.5 Dark Down 24.7 133.8 Low 09:36:15 - 10:02:58 -357
Klamath Falls 09:49:39 -61.7 Dark Down 24.9 133.7 Low 09:36:18 - 10:03:01 -362
Sisters 09:49:21 -60.4 Dark Down 23.6 134.5 Low 09:36:00 - 10:02:43 -363
La Pine/Gilchrist 09:49:25 -60.7 Dark Down 24.0 134.4 Low 09:36:04 - 10:02:47 -367
Oregon Observatory 09:49:23 -60.6 Dark Down 23.9 134.5 Low 09:36:02 - 10:02:45 -369
Bend 09:49:22 -60.4 Dark Down 23.9 134.7 Low 09:36:00 - 10:02:43 -374
Tulelake 09:49:40 -61.6 Dark Down 25.3 133.9 Low 09:36:19 - 10:03:02 -376
The Dalles 09:49:07 -59.4 Dark Down 22.8 135.2 Low 09:35:46 - 10:02:29 -377
Redmond 09:49:19 -60.2 Dark Down 23.8 134.9 Low 09:35:57 - 10:02:40 -379
Madras/Culver 09:49:15 -60.0 Dark Down 23.5 135.0 Low 09:35:54 - 10:02:37 -381
Maupin 09:49:10 -59.6 Dark Down 23.2 135.2 Low 09:35:49 - 10:02:32 -382
Fall River/Burney 09:49:48 -62.0 Dark Down 26.0 133.7 Low 09:36:27 - 10:03:10 -385
Goldendale 09:49:03 -59.1 Dark Down 22.8 135.6 Low 09:35:42 - 10:02:25 -392
North Lake 09:49:26 -60.6 Dark Down 24.7 134.8 Low 09:36:05 - 10:02:48 -393
Yakima 09:48:56 -58.5 Dark Down 22.4 136.1 Low 09:35:35 - 10:02:18 -403
Ellensburg 09:48:53 -58.2 Dark Down 22.1 136.2 Low 09:35:31 - 10:02:14 -404
Toppenish/White Swan 09:48:57 -58.5 Dark Down 22.6 136.1 Low 09:35:35 - 10:02:18 -409
Paisley 09:49:29 -60.7 Dark Down 25.2 135.0 Low 09:36:08 - 10:02:51 -411
Greenville 09:49:54 -62.2 Dark Down 26.9 133.8 Low 09:36:33 - 10:03:16 -412
Wenatchee 09:48:49 -57.9 Dark Down 21.9 136.5 Low 09:35:27 - 10:02:10 -414
Quincy 09:49:56 -62.3 Dark Down 27.0 133.8 Low 09:36:35 - 10:03:18 -414
Gimple 09:49:54 -62.1 Dark Down 26.9 133.9 Low 09:36:32 - 10:03:15 -416
Entiat 09:48:46 -57.7 Dark Down 21.7 136.6 Low 09:35:24 - 10:02:07 -418
Manson/Chelan 09:48:44 -57.5 Dark Down 21.6 136.7 Low 09:35:23 - 10:02:06 -422
Lakeview 09:49:33 -60.8 Dark Down 25.7 135.0 Low 09:36:11 - 10:02:54 -422
Susanville 09:49:50 -61.9 Dark Down 26.8 134.2 Low 09:36:29 - 10:03:12 -423
Cedarville 09:49:38 -61.0 Dark Down 26.3 135.0 Low 09:36:16 - 10:02:59 -434
Brewster 09:48:41 -57.2 Dark Down 21.6 137.1 Low 09:35:19 - 10:02:02 -437
Portola 09:49:54 -62.0 Dark Down 27.4 134.1 Low 09:36:32 - 10:03:15 -437
Okanogan 09:48:37 -56.9 Dark Down 21.5 137.4 Low 09:35:16 - 10:01:59 -446
Southern Okanagan 09:48:30 -56.4 Dark Down 20.9 137.6 Low 09:35:08 - 10:01:51 -450
Okanagan Falls 09:48:29 -56.3 Dark Down 20.8 137.6 Low 09:35:07 - 10:01:50 -450
George/Umatilla 09:48:56 -58.2 Dark Down 23.5 137.0 Low 09:35:35 - 10:02:18 -451
Penticton 09:48:27 -56.2 Dark Down 20.6 137.7 Low 09:35:06 - 10:01:49 -452
Tonasket 09:48:34 -56.6 Dark Down 21.3 137.6 Low 09:35:12 - 10:01:55 -453
Oroville 09:48:32 -56.5 Dark Down 21.1 137.6 Low 09:35:10 - 10:01:53 -454
Pasco 09:48:52 -57.9 Dark Down 23.3 137.3 Low 09:35:31 - 10:02:14 -460
Rutland 09:48:24 -55.8 Dark Down 20.4 137.9 Low 09:35:02 - 10:01:45 -461
Reno 09:49:53 -61.7 Dark Down 27.9 134.6 Low 09:36:32 - 10:03:15 -469
PNWRO 09:48:53 -57.9 Dark Down 23.6 137.4 Low 09:35:32 - 10:02:15 -470
Carson City 09:49:57 -61.8 Dark Down 28.2 134.5 Low 09:36:36 - 10:03:19 -474
Gardnerville 09:49:58 -61.9 Dark Down 28.4 134.5 Low 09:36:37 - 10:03:20 -479
CPSLO 09:50:36 -63.9 Dark Down 30.4 132.3 Up 09:37:15 - 10:03:58 -491
Yerington 09:49:55 -61.5 Dark Down 28.7 135.0 Low 09:36:33 - 10:03:16 -505
Lee Vining 09:50:04 -61.8 Dark Down 29.4 134.7 Low 09:36:43 - 10:03:26 -521
Hawthorne 09:49:57 -61.3 Dark Down 29.3 135.4 Low 09:36:36 - 10:03:19 -536
Bishop 09:50:05 -61.5 Dark Down 30.3 135.1 Up 09:36:44 - 10:03:27 -564
Lone Pine 09:50:11 -61.5 Dark Down 31.0 135.2 Up 09:36:50 - 10:03:33 -592
Tonopah 09:49:54 -60.5 Dark Down 30.4 136.5 Up 09:36:32 - 10:03:15 -610
Wildwood 09:50:35 -62.6 Dark Down 32.5 133.6 Up 09:37:14 - 10:03:57 -614
Beatty 09:50:01 -60.5 Dark Down 31.5 136.5 Up 09:36:40 - 10:03:23 -651
Indian Springs 09:49:58 -59.8 Dark Down 32.3 137.4 Up 09:36:36 - 10:03:19 -711
Idyllwild 09:50:28 -61.2 Dark Down 33.9 135.2 Up 09:37:07 - 10:03:50 -717
Henderson 09:49:59 -59.4 Dark Down 33.1 137.8 Up 09:36:37 - 10:03:20 -756
Searchlight/Boulder City 09:50:03 -59.5 Dark Down 33.6 137.6 Up 09:36:41 - 10:03:24 -772
Calipatria 09:50:27 -60.4 Dark Down 35.0 136.1 Up 09:37:06 - 10:03:49 -793
Laughlin/Bullhead City 09:50:03 -59.3 Dark Down 34.0 137.9 Up 09:36:42 - 10:03:25 -796
Mohave Valley 09:50:06 -59.3 Dark Down 34.2 137.8 Up 09:36:45 - 10:03:28 -802
Kingman/Dolan Springs 09:50:01 -58.9 Dark Down 34.2 138.4 Up 09:36:40 - 10:03:23 -823
Lake Havasu City 09:50:08 -59.2 Dark Down 34.6 137.8 Up 09:36:47 - 10:03:30 -824
Patrick 09:49:58 -58.7 Dark Down 34.2 138.6 Up 09:36:36 - 10:03:19 -828
Blythe 09:50:18 -59.6 Dark Down 35.1 137.2 Up 09:36:57 - 10:03:40 -831
Parker 09:50:11 -59.2 Dark Down 34.9 137.7 Up 09:36:50 - 10:03:33 -834
Yuma 09:50:26 -59.7 Dark Down 35.8 136.7 Up 09:37:04 - 10:03:47 -852
DCO 09:49:57 -58.2 Dark Down 34.8 139.2 Up 09:36:35 - 10:03:18 -872
Niwot 09:48:31 -51.2 Dark Down 34.3 149.3 Up 09:35:10 - 10:01:53 -1199

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 15BF519, (2019/12/27 09:53UT)
Object            RA         Dec     mag  sep  mel
Regulus        10:08:22.0 +11:58:02  1.3 24.87 140
Alphard        09:27:35.2 -08:39:31  2.0 20.88 137
PPM 193828     10:49:43.5 -09:51:10  5.5  0.79 120
PPM 223518     10:49:49.6 -10:15:08  8.5  0.55 120
PPM 223558     10:51:31.2 -10:25:07  9.5  0.11 120
15BF519        10:51:58.7 -10:25:03 12.5       119
Positions are for J2000

Event circumstances last updated at 2018/10/08 19:40:55 UT

Marc W. Buie, Southwest Research Institute

RECON