RECON: TNO occultation with 470309

Event between (470309) 07JK43 and star UC4-467-063296 with event index number of 190596

Geocentric closest approach at 2019/05/08 10:18:17 UTC

J2000 position of star is 17:39:15.3 +03:18:56
Equinox of date position of star is 17:40:07.5 +03:18:25
Stellar brightness R=15.8, use SENSEUP=128
Star is 154 degrees from the moon. Moon is 14% illuminated.
TNO apparent brightness V=21.0

[RECON map]
TNO is 24.5 AU from the Sun and 23.8 AU from the Earth.
The TNO is moving 21.6 km/sec on the sky relative to the star, or, 4.5 arcsec/hr.
The 1-sigma error in the time of the event is 61 seconds.
The 1-sigma cross-track error in the shadow position is 1289 km.
The sky-plane scale is 17230.2 km/arcsec.

The TNO has an absolute magnitude Hv=7.0
Diameter=239.9 km assuming a 5% albedo -- 11.1 sec chord
Diameter=97.9 km assuming a 30% albedo -- 4.5 sec chord
Dynamical classification is CENTAURS
 
 
 
 
 
 

Star training set for 470309, (2019/05/08 10:18UT)
Object            RA         Dec     mag  sep  mel
Antares        16:30:35.8 -26:28:24  0.9 34.21 158
60Bet Oph      17:44:25.8 +04:33:38  2.8  1.64 153
PPM 164135     17:32:19.7 +02:42:42  6.5  2.06 154
PPM 164378     17:40:29.2 +03:22:59  8.0  0.10 154
470309         17:40:13.3 +03:18:21 15.8       154
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 14.6 km RECON observability=1.0 and success probability=23.3%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Niwot 10:19:31 -16.0 AT Down 51.9 197.8 Up 10:13:58 - 10:25:03 -101
Oroville 10:20:34 -16.4 AT Down 44.3 175.6 Up 10:15:01 - 10:26:06 -220
Tonasket 10:20:33 -16.6 AT Down 44.5 175.6 Up 10:15:01 - 10:26:06 -235
Okanogan 10:20:33 -17.0 AT Down 44.9 175.4 Up 10:15:01 - 10:26:06 -264
Brewster 10:20:33 -17.3 AT Down 45.1 175.0 Up 10:15:01 - 10:26:06 -290
Manson/Chelan 10:20:34 -17.6 AT Down 45.3 174.5 Up 10:15:01 - 10:26:06 -321
Entiat 10:20:34 -17.8 AT Down 45.5 174.4 Up 10:15:01 - 10:26:06 -339
Wenatchee 10:20:33 -18.0 Dark Down 45.8 174.2 Up 10:15:01 - 10:26:06 -360
Pasco 10:20:28 -18.5 Dark Down 47.0 175.8 Up 10:14:55 - 10:26:00 -383
PNWRO 10:20:26 -18.6 Dark Down 47.2 176.1 Up 10:14:54 - 10:25:59 -389
Ellensburg 10:20:33 -18.4 Dark Down 46.2 173.9 Up 10:15:00 - 10:26:05 -398
George/Umatilla 10:20:28 -18.8 Dark Down 47.3 175.5 Up 10:14:55 - 10:26:00 -416
Yakima 10:20:32 -18.8 Dark Down 46.6 173.8 Up 10:15:00 - 10:26:05 -427
Toppenish/White Swan 10:20:32 -18.9 Dark Down 46.8 174.0 Up 10:14:59 - 10:26:04 -433
Goldendale 10:20:32 -19.5 Dark Down 47.3 173.3 Up 10:14:59 - 10:26:04 -491
The Dalles 10:20:32 -19.8 Dark Down 47.5 172.7 Up 10:15:00 - 10:26:05 -524
Maupin 10:20:31 -20.1 Dark Down 47.9 172.8 Up 10:14:59 - 10:26:04 -548
Madras/Culver 10:20:30 -20.6 Dark Down 48.5 172.7 Up 10:14:57 - 10:26:02 -588
Redmond 10:20:29 -20.9 Dark Down 48.8 172.6 Up 10:14:57 - 10:26:02 -616
Sisters 10:20:31 -21.1 Dark Down 48.8 172.0 Up 10:14:58 - 10:26:03 -633
Bend 10:20:29 -21.2 Dark Down 49.0 172.3 Up 10:14:57 - 10:26:02 -638
Oregon Observatory 10:20:29 -21.3 Dark Down 49.2 172.1 Up 10:14:57 - 10:26:02 -656
La Pine/Gilchrist 10:20:29 -21.5 Dark Down 49.4 172.0 Up 10:14:56 - 10:26:01 -674
North Lake 10:20:26 -21.6 Dark Down 49.9 172.8 Up 10:14:54 - 10:25:59 -676
Paisley 10:20:24 -21.9 Dark Down 50.4 173.3 Up 10:14:52 - 10:25:57 -698
Lakeview 10:20:22 -22.3 Dark Down 51.0 173.5 Up 10:14:50 - 10:25:55 -726
Cedarville 10:20:20 -22.7 Dark Down 51.6 173.7 Up 10:14:48 - 10:25:53 -764
Chiloquin 10:20:28 -22.6 Dark Down 50.4 171.2 Up 10:14:55 - 10:26:00 -772
Klamath Falls 10:20:27 -22.8 Dark Down 50.8 171.3 Up 10:14:54 - 10:25:59 -793
Tulelake 10:20:25 -22.9 Dark Down 51.1 171.7 Up 10:14:53 - 10:25:58 -798
Fall River/Burney 10:20:23 -23.6 Dark Down 52.0 171.6 Up 10:14:51 - 10:25:56 -861
DCO 10:19:42 -24.0 Dark Down 58.1 185.5 Up 10:14:10 - 10:25:15 -867
Tonopah 10:20:03 -24.0 Dark Down 55.2 178.2 Up 10:14:30 - 10:25:35 -867
Susanville 10:20:19 -23.8 Dark Down 52.7 172.7 Up 10:14:47 - 10:25:52 -870
Patrick 10:19:46 -24.2 Dark Down 57.8 184.2 Up 10:14:13 - 10:25:18 -883
Reno 10:20:14 -24.1 Dark Down 53.6 173.9 Up 10:14:42 - 10:25:47 -893
Indian Springs 10:19:54 -24.3 Dark Down 56.7 180.8 Up 10:14:21 - 10:25:26 -896
Henderson 10:19:51 -24.3 Dark Down 57.3 182.1 Up 10:14:18 - 10:25:23 -898
Yerington 10:20:11 -24.2 Dark Down 54.2 174.9 Up 10:14:38 - 10:25:43 -900
Gimple 10:20:19 -24.1 Dark Down 52.9 172.3 Up 10:14:47 - 10:25:52 -902
Portola 10:20:17 -24.2 Dark Down 53.3 172.9 Up 10:14:45 - 10:25:50 -906
Greenville 10:20:20 -24.2 Dark Down 52.9 172.2 Up 10:14:47 - 10:25:52 -906
Hawthorne 10:20:09 -24.3 Dark Down 54.7 175.8 Up 10:14:36 - 10:25:41 -907
Kingman/Dolan Springs 10:19:46 -24.4 Dark Down 58.1 183.8 Up 10:14:13 - 10:25:18 -910
Carson City 10:20:14 -24.4 Dark Down 54.0 173.9 Up 10:14:41 - 10:25:46 -918
Quincy 10:20:19 -24.3 Dark Down 53.1 172.1 Up 10:14:46 - 10:25:51 -921
Beatty 10:19:58 -24.6 Dark Down 56.4 178.9 Up 10:14:26 - 10:25:31 -929
Gardnerville 10:20:13 -24.6 Dark Down 54.2 173.9 Up 10:14:40 - 10:25:45 -934
Searchlight/Boulder City 10:19:49 -24.7 Dark Down 57.8 182.2 Up 10:14:17 - 10:25:22 -937
Laughlin/Bullhead City 10:19:48 -24.7 Dark Down 58.1 182.9 Up 10:14:15 - 10:25:20 -940
Mohave Valley 10:19:47 -24.9 Dark Down 58.4 182.9 Up 10:14:14 - 10:25:19 -960
Lee Vining 10:20:09 -25.0 Dark Down 55.3 174.9 Up 10:14:36 - 10:25:41 -974
Lake Havasu City 10:19:45 -25.1 Dark Down 58.8 183.4 Up 10:14:12 - 10:25:17 -976
Bishop 10:20:05 -25.1 Dark Down 55.9 176.0 Up 10:14:32 - 10:25:37 -981
Parker 10:19:44 -25.3 Dark Down 59.1 183.5 Up 10:14:11 - 10:25:16 -1001
Lone Pine 10:20:02 -25.5 Dark Down 56.7 176.5 Up 10:14:29 - 10:25:34 -1021
Blythe 10:19:43 -25.9 Dark Down 59.7 182.9 Up 10:14:11 - 10:25:16 -1057
Yuma 10:19:41 -26.6 Dark Down 60.6 182.9 Up 10:14:08 - 10:25:13 -1130
Calipatria 10:19:45 -26.8 Dark Down 60.2 181.1 Up 10:14:13 - 10:25:18 -1147
Idyllwild 10:19:51 -27.0 Dark Down 59.6 178.8 Up 10:14:19 - 10:25:24 -1166
Wildwood 10:19:57 -27.7 Dark Down 59.1 175.2 Up 10:14:25 - 10:25:30 -1243
CPSLO 10:20:08 -27.9 Dark Down 57.7 171.6 Up 10:14:35 - 10:25:40 -1261

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 470309, (2019/05/08 10:18UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9 34.21 158
60Bet Oph      17:43:28.3 +04:34:05  2.8  1.64 153
PPM 164135     17:31:21.4 +02:43:30  6.5  2.06 154
PPM 164378     17:39:31.2 +03:23:33  8.0  0.10 154
470309         17:39:15.3 +03:18:56 15.8       154
Positions are for J2000

Event circumstances last updated at 2017/06/01 18:09:43 UT

Marc W. Buie, Southwest Research Institute

RECON