RECON: TNO occultation with 03YR179

Event between 03YR179 and star GA1100:03149035 with event index number of 250521

Geocentric closest approach at 2020/03/16 08:43:04 UTC

J2000 position of star is 09:03:26.7 +21:49:11
Equinox of date position of star is 09:04:33.6 +21:44:30
Stellar brightness G=14.3, use SENSEUP=64
Star is 134 degrees from the moon. Moon is 51% illuminated.
TNO apparent brightness V=23.5

[RECON map]
TNO is 41.1 AU from the Sun and 40.4 AU from the Earth.
The TNO is moving 17.2 km/sec on the sky relative to the star, or, 2.1 arcsec/hr.
The 1-sigma error in the time of the event is 207 seconds.
The 1-sigma cross-track error in the shadow position is 1530 km.
The sky-plane scale is 29319.9 km/arcsec.

The TNO has an absolute magnitude Hv=7.3
Diameter=210.9 km assuming a 5% albedo -- 12.3 sec chord
Diameter=86.1 km assuming a 30% albedo -- 5.0 sec chord
Dynamical classification is CLASSICAL
 
 
 
 
 
 

Star training set for 03YR179, (2020/03/16 08:43UT)
Object            RA         Dec     mag  sep  mel
Regulus        10:09:26.8 +11:52:04  1.3 18.37 116
77Xi Cnc       09:10:31.0 +21:57:45  5.1  1.39 132
PPM 099290     09:06:09.8 +22:45:06  7.9  1.08 133
PPM 099263     09:03:54.7 +21:26:19  8.8  0.34 134
PPM 099260     09:03:46.2 +21:53:15 11.2  0.24 134
03YR179        09:04:36.3 +21:44:19 14.3       133
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 4.4 sigma about the mid-time.
The median site spacing is 12.4 km RECON observability=1.0 and success probability=0.0%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Kelowna 08:40:50 -41.0 Dark Down 42.4 252.4 Up 08:25:50 - 08:55:50 11283
Summerland 08:40:47 -41.4 Dark Down 42.6 252.4 Up 08:25:47 - 08:55:47 11254
Penticton 08:40:48 -41.4 Dark Down 42.6 252.6 Up 08:25:48 - 08:55:48 11252
Okanagan Falls 08:40:47 -41.6 Dark Down 42.7 252.7 Up 08:25:47 - 08:55:47 11238
Oliver 08:40:46 -41.8 Dark Down 42.7 252.9 Up 08:25:46 - 08:55:46 11227
Anarchist Mountain Observatory 08:40:46 -41.9 Dark Down 42.6 253.2 Up 08:25:46 - 08:55:46 11221
Oroville 08:40:43 -42.0 Dark Down 42.7 253.2 Up 08:25:43 - 08:55:43 11213
Tonasket 08:40:43 -42.2 Dark Down 42.8 253.4 Up 08:25:43 - 08:55:43 11196
Okanogan 08:40:42 -42.6 Dark Down 43.0 253.6 Up 08:25:42 - 08:55:42 11168
Brewster 08:40:41 -42.9 Dark Down 43.2 253.6 Up 08:25:41 - 08:55:41 11141
Manson/Chelan 08:40:42 -43.1 Dark Down 43.5 253.5 Up 08:25:42 - 08:55:42 11115
Entiat 08:40:41 -43.3 Dark Down 43.6 253.6 Up 08:25:41 - 08:55:41 11096
Wenatchee 08:40:39 -43.6 Dark Down 43.7 253.7 Up 08:25:39 - 08:55:39 11074
Niwot 08:39:31 -46.3 Dark Up 34.0 271.0 Up 08:24:31 - 08:54:31 11049
SwRI 08:39:31 -46.4 Dark Up 34.1 271.1 Up 08:24:31 - 08:54:31 11037
Ellensburg 08:40:39 -44.0 Dark Down 44.0 253.9 Up 08:25:39 - 08:55:39 11036
Pasco 08:40:32 -44.6 Dark Down 43.2 255.9 Up 08:25:32 - 08:55:32 11027
PNWRO 08:40:31 -44.8 Dark Down 43.1 256.3 Up 08:25:31 - 08:55:31 11015
Yakima 08:40:38 -44.4 Dark Down 44.1 254.3 Up 08:25:38 - 08:55:38 11005
Toppenish/White Swan 08:40:35 -44.6 Dark Down 44.0 254.6 Up 08:25:35 - 08:55:35 10995
George/Umatilla 08:40:29 -44.9 Dark Down 43.5 256.0 Up 08:25:29 - 08:55:29 10994
Goldendale 08:40:34 -45.2 Dark Down 44.5 254.7 Up 08:25:34 - 08:55:34 10939
The Dalles 08:40:33 -45.5 Dark Down 44.8 254.6 Up 08:25:33 - 08:55:33 10910
Maupin 08:40:31 -45.9 Dark Down 44.8 255.1 Up 08:25:31 - 08:55:31 10881
Madras/Culver 08:40:29 -46.4 Dark Down 45.0 255.6 Up 08:25:29 - 08:55:29 10837
Redmond 08:40:28 -46.8 Dark Down 45.1 255.9 Up 08:25:28 - 08:55:28 10808
Sisters 08:40:28 -46.8 Dark Down 45.4 255.5 Up 08:25:28 - 08:55:28 10796
Bend 08:40:26 -47.0 Dark Down 45.3 256.0 Up 08:25:26 - 08:55:26 10786
Oregon Observatory 08:40:27 -47.2 Dark Down 45.4 256.0 Up 08:25:27 - 08:55:27 10768
La Pine/Gilchrist 08:40:27 -47.4 Dark Down 45.5 256.2 Up 08:25:27 - 08:55:27 10750
North Lake 08:40:22 -47.8 Dark Down 45.2 257.1 Up 08:25:22 - 08:55:22 10736
Paisley 08:40:19 -48.3 Dark Down 45.1 258.0 Up 08:25:19 - 08:55:19 10704
Lakeview 08:40:15 -48.8 Dark Down 45.0 258.6 Up 08:25:15 - 08:55:15 10670
Chiloquin 08:40:23 -48.6 Dark Down 46.0 257.0 Up 08:25:23 - 08:55:23 10649
Klamath Falls 08:40:20 -48.9 Dark Down 46.1 257.4 Up 08:25:20 - 08:55:20 10624
Cedarville 08:40:13 -49.4 Dark Down 45.0 259.4 Up 08:25:13 - 08:55:13 10623
Tulelake 08:40:18 -49.1 Dark Down 45.9 257.9 Up 08:25:18 - 08:55:18 10613
Fall River/Burney 08:40:11 -50.0 Dark Down 46.0 258.9 Up 08:25:11 - 08:55:11 10541
Susanville 08:40:09 -50.5 Dark Down 45.6 260.1 Up 08:25:09 - 08:55:09 10516
Gimple 08:40:09 -50.8 Dark Down 45.8 260.2 Up 08:25:09 - 08:55:09 10485
Greenville 08:40:09 -50.8 Dark Down 45.9 260.1 Up 08:25:09 - 08:55:09 10483
Reno 08:40:03 -51.3 Dark Down 45.1 261.6 Up 08:25:03 - 08:55:03 10474
Portola 08:40:07 -51.1 Dark Down 45.6 260.8 Up 08:25:07 - 08:55:07 10473
Quincy 08:40:08 -51.0 Dark Down 45.9 260.3 Up 08:25:08 - 08:55:08 10466
Yerington 08:39:59 -51.7 Dark Down 44.7 262.6 Up 08:24:59 - 08:54:59 10452
Tonopah 08:39:49 -52.2 Dark Down 43.3 264.8 Up 08:24:49 - 08:54:49 10446
Carson City 08:40:02 -51.6 Dark Down 45.2 262.0 Up 08:25:02 - 08:55:02 10445
Hawthorne 08:39:55 -52.0 Dark Down 44.4 263.4 Up 08:24:55 - 08:54:55 10433
Gardnerville 08:40:01 -51.8 Dark Down 45.2 262.2 Up 08:25:01 - 08:55:01 10426
Indian Springs 08:39:38 -53.2 Dark Down 42.3 267.2 Up 08:24:38 - 08:54:38 10380
Lee Vining 08:39:54 -52.7 Dark Down 44.8 263.6 Up 08:24:54 - 08:54:54 10367
Beatty 08:39:43 -53.2 Dark Down 43.1 266.2 Up 08:24:43 - 08:54:43 10367
Henderson 08:39:35 -53.5 Dark Down 41.7 268.1 Up 08:24:35 - 08:54:35 10362
DCO 08:39:25 -53.8 Dark Down 40.3 270.0 Up 08:24:25 - 08:54:25 10354
Patrick 08:39:28 -53.7 Dark Down 40.9 269.3 Up 08:24:28 - 08:54:28 10352
Bishop 08:39:50 -53.1 Dark Down 44.3 264.7 Up 08:24:50 - 08:54:50 10344
Kingman/Dolan Springs 08:39:29 -54.0 Dark Down 41.0 269.4 Up 08:24:29 - 08:54:29 10326
Searchlight/Boulder City 08:39:32 -54.0 Dark Down 41.7 268.6 Up 08:24:32 - 08:54:32 10316
Laughlin/Bullhead City 08:39:30 -54.2 Dark Down 41.4 269.1 Up 08:24:30 - 08:54:30 10304
Lone Pine 08:39:46 -53.8 Dark Down 44.1 265.7 Up 08:24:46 - 08:54:46 10292
Mohave Valley 08:39:29 -54.4 Dark Down 41.4 269.4 Up 08:24:29 - 08:54:29 10281
Lake Havasu City 08:39:26 -54.7 Dark Down 41.3 269.8 Up 08:24:26 - 08:54:26 10257
Parker 08:39:25 -55.0 Dark Down 41.2 270.2 Up 08:24:25 - 08:54:25 10228
Blythe 08:39:24 -55.6 Dark Down 41.5 270.5 Up 08:24:24 - 08:54:24 10171
Idyllwild 08:39:31 -56.2 Dark Down 43.2 269.2 Up 08:24:31 - 08:54:31 10098
Calipatria 08:39:24 -56.4 Dark Down 42.3 270.4 Up 08:24:24 - 08:54:24 10092
Yuma 08:39:19 -56.5 Dark Down 41.5 271.2 Up 08:24:19 - 08:54:19 10090
CPSLO 08:39:48 -55.5 Dark Down 46.3 265.3 Up 08:24:48 - 08:54:48 10083
Wildwood 08:39:38 -56.3 Dark Down 44.8 267.8 Up 08:24:38 - 08:54:38 10056

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 03YR179, (2020/03/16 08:43UT)
Object            RA         Dec     mag  sep  mel
Regulus        10:08:22.0 +11:58:02  1.3 18.37 116
77Xi Cnc       09:09:21.5 +22:02:44  5.1  1.39 132
PPM 099290     09:04:59.8 +22:49:59  7.9  1.08 133
PPM 099263     09:02:45.1 +21:31:09  8.8  0.34 134
PPM 099260     09:02:36.5 +21:58:05 11.2  0.24 134
03YR179        09:03:26.7 +21:49:11 14.3       134
Positions are for J2000

Event circumstances last updated at 2019/06/07 23:22:21 UT

Marc W. Buie, Southwest Research Institute

RECON