RECON: TNO occultation with 516977

Event between (516977) 12HZ84 and star GA0700:32447311 with event index number of 267072

Geocentric closest approach at 2019/10/16 04:05:36 UTC

J2000 position of star is 19:12:34.9 -19:31:50
Equinox of date position of star is 19:13:43.4 -19:29:48
Stellar brightness G=15.2, use SENSEUP=128
Star is 121 degrees from the moon. Moon is 95% illuminated.
TNO apparent brightness V=25.1

[RECON map]
TNO is 40.0 AU from the Sun and 40.0 AU from the Earth.
The TNO is moving 8.2 km/sec on the sky relative to the star, or, 1.0 arcsec/hr.
The 1-sigma error in the time of the event is 1061 seconds.
The 1-sigma cross-track error in the shadow position is 2629 km.
The sky-plane scale is 29044.6 km/arcsec.

The TNO has an absolute magnitude Hv=8.9
Diameter=100.0 km assuming a 5% albedo -- 12.2 sec chord
Diameter=40.8 km assuming a 30% albedo -- 5.0 sec chord
Dynamical classification is SCATNEAR
 
 
 
 
 
 

Star training set for 516977, (2019/10/16 04:06UT)
Object            RA         Dec     mag  sep  mel
Antares        16:30:37.4 -26:28:27  0.9 38.03 157
Nunki          18:56:29.5 -26:16:14  2.0  7.85 125
PPM 235581     19:10:58.1 -19:46:15  6.4  0.71 122
PPM 235649     19:13:53.6 -19:12:06  8.5  0.30 121
PPM 235661     19:14:14.3 -19:27:09  9.1  0.12 121
516977         19:13:44.6 -19:29:46 15.2       121
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 0.8 sigma about the mid-time.
The median site spacing is 22.5 km RECON observability=0.4 and success probability=5.9%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Kelowna 04:10:56 -29.9 Dark Up 12.2 217.9 Really Low 03:55:56 - 04:25:56 3301
Summerland 04:10:56 -29.9 Dark Up 12.6 217.7 Really Low 03:55:56 - 04:25:56 3292
Penticton 04:10:57 -30.0 Dark Up 12.6 217.8 Really Low 03:55:57 - 04:25:57 3287
Okanagan Falls 04:10:58 -30.0 Dark Up 12.8 217.8 Really Low 03:55:58 - 04:25:58 3279
Oliver 04:10:59 -30.1 Dark Up 12.9 217.9 Really Low 03:55:59 - 04:25:59 3271
Anarchist Mountain Observatory 04:11:01 -30.3 Dark Up 12.9 218.1 Really Low 03:56:01 - 04:26:01 3260
Oroville 04:11:02 -30.3 Dark Up 13.0 218.0 Really Low 03:56:02 - 04:26:02 3257
Tonasket 04:11:03 -30.4 Dark Up 13.2 218.1 Really Low 03:56:03 - 04:26:03 3246
Okanogan 04:11:06 -30.5 Dark Up 13.5 218.0 Really Low 03:56:06 - 04:26:06 3232
Brewster 04:11:05 -30.4 Dark Up 13.8 217.9 Really Low 03:56:05 - 04:26:05 3222
Manson/Chelan 04:11:04 -30.3 Dark Up 14.1 217.6 Really Low 03:56:04 - 04:26:04 3218
Entiat 04:11:06 -30.3 Dark Up 14.3 217.6 Really Low 03:56:06 - 04:26:06 3208
Wenatchee 04:11:05 -30.4 Dark Up 14.6 217.5 Really Low 03:56:05 - 04:26:05 3197
Ellensburg 04:11:07 -30.4 Dark Up 15.0 217.4 Really Low 03:56:07 - 04:26:07 3180
Yakima 04:11:08 -30.5 Dark Up 15.3 217.4 Really Low 03:56:08 - 04:26:08 3160
Toppenish/White Swan 04:11:12 -30.7 Dark Up 15.4 217.6 Really Low 03:56:12 - 04:26:12 3146
Goldendale 04:11:11 -30.6 Dark Up 16.0 217.4 Really Low 03:56:11 - 04:26:11 3124
Pasco 04:11:23 -31.6 Dark Up 14.9 218.8 Really Low 03:56:23 - 04:26:23 3119
The Dalles 04:11:10 -30.5 Dark Up 16.4 217.1 Really Low 03:56:10 - 04:26:10 3118
George/Umatilla 04:11:22 -31.6 Dark Up 15.3 218.7 Really Low 03:56:22 - 04:26:22 3105
PNWRO 04:11:25 -31.9 Dark Up 15.0 219.1 Really Low 03:56:25 - 04:26:25 3102
Maupin 04:11:15 -30.7 Dark Up 16.6 217.3 Really Low 03:56:15 - 04:26:15 3095
Madras/Culver 04:11:17 -30.9 Dark Up 17.1 217.3 Really Low 03:56:17 - 04:26:17 3066
Sisters 04:11:15 -30.7 Dark Up 17.6 217.0 Really Low 03:56:15 - 04:26:15 3055
Redmond 04:11:19 -31.0 Dark Up 17.4 217.4 Really Low 03:56:19 - 04:26:19 3047
Bend 04:11:18 -30.9 Dark Up 17.6 217.3 Really Low 03:56:18 - 04:26:18 3038
Oregon Observatory 04:11:20 -30.9 Dark Up 17.8 217.2 Really Low 03:56:20 - 04:26:20 3030
La Pine/Gilchrist 04:11:18 -30.9 Dark Up 18.0 217.2 Really Low 03:56:18 - 04:26:18 3020
North Lake 04:11:27 -31.5 Dark Up 18.1 217.8 Really Low 03:56:27 - 04:26:27 2986
Chiloquin 04:11:22 -31.1 Dark Up 19.1 217.1 Really Low 03:56:22 - 04:26:22 2963
Paisley 04:11:33 -32.0 Dark Up 18.3 218.3 Really Low 03:56:33 - 04:26:33 2948
Klamath Falls 04:11:25 -31.2 Dark Up 19.3 217.3 Really Low 03:56:25 - 04:26:25 2942
Tulelake 04:11:30 -31.5 Dark Up 19.4 217.6 Really Low 03:56:30 - 04:26:30 2921
Lakeview 04:11:37 -32.3 Dark Up 18.6 218.6 Really Low 03:56:37 - 04:26:37 2915
Cedarville 04:11:43 -32.6 Dark Up 19.1 218.9 Really Low 03:56:43 - 04:26:43 2873
Fall River/Burney 04:11:36 -31.9 Dark Up 20.0 217.9 Low 03:56:36 - 04:26:36 2866
Susanville 04:11:46 -32.7 Dark Up 20.2 218.7 Low 03:56:46 - 04:26:46 2815
Greenville 04:11:44 -32.5 Dark Up 20.5 218.5 Low 03:56:44 - 04:26:44 2803
Gimple 04:11:46 -32.6 Dark Up 20.5 218.6 Low 03:56:46 - 04:26:46 2802
Quincy 04:11:46 -32.6 Dark Up 20.7 218.6 Low 03:56:46 - 04:26:46 2791
Portola 04:11:51 -33.0 Dark Up 20.5 219.0 Low 03:56:51 - 04:26:51 2774
Reno 04:11:57 -33.6 Dark Up 20.4 219.7 Low 03:56:57 - 04:26:57 2746
Carson City 04:11:59 -33.7 Dark Up 20.7 219.8 Low 03:56:59 - 04:26:59 2723
Gardnerville 04:12:02 -33.8 Dark Up 20.8 219.9 Low 03:57:02 - 04:27:02 2707
Yerington 04:12:07 -34.3 Dark Up 20.5 220.4 Low 03:57:07 - 04:27:07 2699
Hawthorne 04:12:13 -34.8 Dark Up 20.5 221.0 Low 03:57:13 - 04:27:13 2659
Lee Vining 04:12:11 -34.6 Dark Up 21.2 220.7 Low 03:57:11 - 04:27:11 2631
Tonopah 04:12:28 -36.1 Dark Up 20.1 222.4 Low 03:57:28 - 04:27:28 2600
Bishop 04:12:22 -35.4 Dark Up 21.3 221.5 Low 03:57:22 - 04:27:22 2578
Lone Pine 04:12:29 -35.9 Dark Up 21.7 222.0 Low 03:57:29 - 04:27:29 2520
Beatty 04:12:38 -36.8 Dark Up 20.7 223.1 Low 03:57:38 - 04:27:38 2514
CPSLO 04:12:13 -34.2 Dark Up 24.0 220.1 Low 03:57:13 - 04:27:13 2483
Niwot 04:13:44 -43.8 Dark Up 11.7 231.6 Really Low 03:58:44 - 04:28:44 2473
Indian Springs 04:12:49 -37.8 Dark Up 20.3 224.1 Low 03:57:49 - 04:27:49 2470
SwRI 04:13:42 -43.8 Dark Up 11.8 231.5 Really Low 03:58:42 - 04:28:42 2468
Henderson 04:12:57 -38.5 Dark Up 20.3 224.8 Low 03:57:57 - 04:27:57 2418
Searchlight/Boulder City 04:13:02 -38.8 Dark Up 20.6 225.0 Low 03:58:02 - 04:28:02 2377
Wildwood 04:12:38 -36.2 Dark Up 23.8 222.3 Low 03:57:38 - 04:27:38 2357
Patrick 04:13:11 -39.6 Dark Up 20.1 225.9 Low 03:58:11 - 04:28:11 2350
Laughlin/Bullhead City 04:13:06 -39.1 Dark Up 20.6 225.4 Low 03:58:06 - 04:28:06 2348
Kingman/Dolan Springs 04:13:10 -39.6 Dark Up 20.3 225.8 Low 03:58:10 - 04:28:10 2338
Mohave Valley 04:13:08 -39.2 Dark Up 20.8 225.5 Low 03:58:08 - 04:28:08 2329
DCO 04:13:18 -40.3 Dark Up 19.8 226.5 Really Low 03:58:18 - 04:28:18 2312
Lake Havasu City 04:13:12 -39.6 Dark Up 21.0 225.8 Low 03:58:12 - 04:28:12 2295
Idyllwild 04:12:57 -37.9 Dark Up 22.9 224.0 Low 03:57:57 - 04:27:57 2292
Parker 04:13:16 -39.7 Dark Up 21.2 225.9 Low 03:58:16 - 04:28:16 2269
Blythe 04:13:14 -39.7 Dark Up 21.7 225.8 Low 03:58:14 - 04:28:14 2237
Calipatria 04:13:11 -39.1 Dark Up 22.6 225.2 Low 03:58:11 - 04:28:11 2222
Yuma 04:13:19 -39.9 Dark Up 22.4 226.1 Low 03:58:19 - 04:28:19 2170

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 516977, (2019/10/16 04:06UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9 38.03 157
Nunki          18:55:15.9 -26:17:49  2.0  7.85 125
PPM 235581     19:09:48.2 -19:48:15  6.4  0.71 122
PPM 235649     19:12:44.0 -19:14:11  8.5  0.30 121
PPM 235661     19:13:04.6 -19:29:14  9.1  0.12 121
516977         19:12:34.9 -19:31:50 15.2       121
Positions are for J2000

Event circumstances last updated at 2019/06/07 22:45:28 UT

Marc W. Buie, Southwest Research Institute

RECON