RECON: TNO occultation with 5145

Event between (5145) Pholus and star GA0780:10132745 with event index number of 316230

Geocentric closest approach at 2020/04/27 11:24:02 UTC

J2000 position of star is 18:16:08.5 -11:21:03
Equinox of date position of star is 18:17:14.6 -11:20:35
Stellar brightness G=16.7, use SENSEUP=128
Star is 166 degrees from the moon. Moon is 17% illuminated.
TNO apparent brightness V=21.8

[RECON map]
TNO is 28.6 AU from the Sun and 28.1 AU from the Earth.
The TNO is moving 12.9 km/sec on the sky relative to the star, or, 2.3 arcsec/hr.
The 1-sigma error in the time of the event is 288 seconds.
The 1-sigma cross-track error in the shadow position is 2556 km.
The sky-plane scale is 20355.8 km/arcsec.

The TNO has an absolute magnitude Hv=7.1
Diameter=229.1 km assuming a 5% albedo -- 17.7 sec chord
Diameter=93.5 km assuming a 30% albedo -- 7.2 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 

Star training set for 5145, (2020/04/27 11:24UT)
Object            RA         Dec     mag  sep  mel
Antares        16:30:39.4 -26:28:31  0.9 29.30 162
35Eta Oph      17:11:32.7 -15:44:55  2.6 16.56 169
PPM 234462     18:24:20.4 -12:00:11  6.3  1.85 166
PPM 234261     18:17:12.4 -11:10:19  7.9  0.17 166
PPM 234245     18:16:40.9 -11:20:30  9.8  0.14 166
5145           18:17:16.4 -11:20:34 16.7       166
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 3.1 sigma about the mid-time.
The median site spacing is 14.6 km RECON observability=0.6 and success probability=7.0%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Clarence Fulton 11:26:27 -10.8 NT Down 28.2 173.5 Low 11:11:27 - 11:41:27 -353
Kelowna 11:26:28 -11.1 NT Down 28.6 173.3 Low 11:11:28 - 11:41:28 -377
Summerland 11:26:29 -11.4 NT Down 28.8 173.1 Low 11:11:29 - 11:41:29 -395
Penticton 11:26:28 -11.4 NT Down 28.9 173.2 Low 11:11:28 - 11:41:28 -396
Oliver 11:26:28 -11.6 NT Down 29.2 173.2 Low 11:11:28 - 11:41:28 -416
Anarchist Mountain Observatory 11:26:27 -11.6 NT Down 29.4 173.4 Low 11:11:27 - 11:41:27 -421
Tonasket 11:26:27 -11.8 NT Down 29.7 173.3 Low 11:11:27 - 11:41:27 -440
Okanogan 11:26:28 -12.1 AT Down 30.0 173.1 Up 11:11:28 - 11:41:28 -462
Brewster 11:26:29 -12.4 AT Down 30.3 172.9 Up 11:11:29 - 11:41:29 -482
Manson/Chelan 11:26:31 -12.7 AT Down 30.5 172.4 Up 11:11:31 - 11:41:31 -501
Entiat 11:26:31 -12.9 AT Down 30.7 172.3 Up 11:11:31 - 11:41:31 -515
Victoria 11:26:48 -13.9 AT Down 29.5 168.9 Low 11:11:48 - 11:41:48 -532
Wenatchee 11:26:31 -13.1 AT Down 30.9 172.2 Up 11:11:31 - 11:41:31 -532
Ellensburg 11:26:32 -13.4 AT Down 31.3 171.9 Up 11:11:32 - 11:41:32 -561
Pasco 11:26:24 -13.1 AT Down 32.2 173.5 Up 11:11:24 - 11:41:24 -576
PNWRO 11:26:23 -13.2 AT Down 32.4 173.7 Up 11:11:23 - 11:41:23 -586
Yakima 11:26:32 -13.7 AT Down 31.7 171.9 Up 11:11:32 - 11:41:32 -586
Toppenish/White Swan 11:26:31 -13.7 AT Down 31.9 172.0 Up 11:11:31 - 11:41:31 -595
Goldendale 11:26:34 -14.3 AT Down 32.5 171.5 Up 11:11:34 - 11:41:34 -638
The Dalles 11:26:36 -14.6 AT Down 32.6 171.1 Up 11:11:36 - 11:41:36 -660
Niwot 11:24:54 -7.9 NT Down 38.0 189.9 Up 11:09:54 - 11:39:54 -672
SwRI 11:24:54 -8.0 NT Down 38.1 189.8 Up 11:09:54 - 11:39:54 -682
Maupin 11:26:34 -14.9 AT Down 33.1 171.1 Up 11:11:34 - 11:41:34 -683
Redmond 11:26:35 -15.5 AT Down 33.9 170.9 Up 11:11:35 - 11:41:35 -742
Sisters 11:26:38 -15.7 AT Down 33.9 170.5 Up 11:11:38 - 11:41:38 -749
Bend 11:26:36 -15.7 AT Down 34.1 170.8 Up 11:11:36 - 11:41:36 -758
Oregon Observatory 11:26:36 -15.9 AT Down 34.3 170.6 Up 11:11:36 - 11:41:36 -772
La Pine/Gilchrist 11:26:37 -16.0 AT Down 34.5 170.5 Up 11:11:37 - 11:41:37 -787
North Lake 11:26:33 -16.0 AT Down 35.0 171.1 Up 11:11:33 - 11:41:33 -801
Paisley 11:26:31 -16.1 AT Down 35.6 171.5 Up 11:11:31 - 11:41:31 -829
Lakeview 11:26:29 -16.3 AT Down 36.1 171.7 Up 11:11:29 - 11:41:29 -858
Klamath Falls 11:26:38 -17.1 AT Down 35.9 170.0 Up 11:11:38 - 11:41:38 -888
Cedarville 11:26:28 -16.6 AT Down 36.8 171.8 Up 11:11:28 - 11:41:28 -898
Fall River/Burney 11:26:35 -17.6 AT Down 37.1 170.3 Up 11:11:35 - 11:41:35 -959
Susanville 11:26:30 -17.5 AT Down 37.8 171.1 Up 11:11:30 - 11:41:30 -985
Gimple 11:26:31 -17.8 AT Down 38.1 170.8 Up 11:11:31 - 11:41:31 -1009
Greenville 11:26:32 -17.9 AT Down 38.0 170.7 Up 11:11:32 - 11:41:32 -1011
Portola 11:26:28 -17.8 AT Down 38.4 171.3 Up 11:11:28 - 11:41:28 -1023
Quincy 11:26:32 -18.0 Dark Down 38.2 170.7 Up 11:11:32 - 11:41:32 -1025
Reno 11:26:24 -17.6 AT Down 38.8 172.0 Up 11:11:24 - 11:41:24 -1026
Yerington 11:26:20 -17.5 AT Down 39.4 172.8 Up 11:11:20 - 11:41:20 -1049
Carson City 11:26:24 -17.8 AT Down 39.1 172.0 Up 11:11:24 - 11:41:24 -1051
Gardnerville 11:26:23 -17.9 AT Down 39.4 172.0 Up 11:11:23 - 11:41:23 -1067
Tonopah 11:26:07 -16.8 AT Down 40.5 175.1 Up 11:11:07 - 11:41:07 -1069
Hawthorne 11:26:16 -17.4 AT Down 39.9 173.4 Up 11:11:16 - 11:41:16 -1070
Lee Vining 11:26:19 -18.1 Dark Down 40.4 172.7 Up 11:11:19 - 11:41:19 -1121
Indian Springs 11:25:56 -16.6 AT Down 42.0 176.9 Up 11:10:56 - 11:40:56 -1141
Beatty 11:26:03 -17.2 AT Down 41.6 175.6 Up 11:11:03 - 11:41:03 -1143
Bishop 11:26:13 -18.0 AT Down 41.1 173.5 Up 11:11:13 - 11:41:13 -1148
Henderson 11:25:50 -16.5 AT Down 42.6 177.8 Up 11:10:50 - 11:40:50 -1164
Patrick 11:25:42 -16.0 AT Down 43.2 179.2 Up 11:10:42 - 11:40:42 -1184
DCO 11:25:36 -15.7 AT Down 43.5 180.2 Up 11:10:36 - 11:40:36 -1190
Searchlight/Boulder City 11:25:49 -16.7 AT Down 43.2 177.9 Up 11:10:49 - 11:40:49 -1205
Kingman/Dolan Springs 11:25:43 -16.3 AT Down 43.5 179.0 Up 11:10:43 - 11:40:43 -1205
Laughlin/Bullhead City 11:25:46 -16.6 AT Down 43.5 178.3 Up 11:10:46 - 11:40:46 -1219
Mohave Valley 11:25:46 -16.8 AT Down 43.7 178.3 Up 11:10:46 - 11:40:46 -1239
Lake Havasu City 11:25:43 -16.8 AT Down 44.1 178.6 Up 11:10:43 - 11:40:43 -1263
George/Scottsdale 11:25:26 -15.5 AT Down 44.9 181.9 Up 11:10:26 - 11:40:26 -1264
Parker 11:25:43 -17.0 AT Down 44.5 178.6 Up 11:10:43 - 11:40:43 -1289
Blythe 11:25:43 -17.5 AT Down 45.0 178.2 Up 11:10:43 - 11:40:43 -1336
CPSLO 11:26:26 -20.6 Dark Down 42.9 170.4 Up 11:11:26 - 11:41:26 -1357
Idyllwild 11:25:59 -18.9 Dark Down 44.8 175.4 Up 11:10:59 - 11:40:59 -1378
Calipatria 11:25:50 -18.4 Dark Down 45.5 176.9 Up 11:10:50 - 11:40:50 -1397
Wildwood 11:26:12 -19.9 Dark Down 44.3 172.9 Up 11:11:12 - 11:41:12 -1397
Yuma 11:25:43 -18.0 AT Down 45.9 178.1 Up 11:10:43 - 11:40:43 -1409

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 5145, (2020/04/27 11:24UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9 29.30 162
35Eta Oph      17:10:22.7 -15:43:29  2.6 16.56 169
PPM 234462     18:23:12.2 -12:00:54  6.3  1.85 166
PPM 234261     18:16:04.6 -11:10:49  7.9  0.17 166
PPM 234245     18:15:33.0 -11:20:59  9.8  0.14 166
5145           18:16:08.5 -11:21:03 16.7       166
Positions are for J2000

Event circumstances last updated at 2019/10/15 22:17:51 UT

Marc W. Buie, Southwest Research Institute

RECON