RECON: TNO occultation with 469987

Event between (469987) 06HJ123 and star UC4-370-075616 with event index number of 208650

Geocentric closest approach at 2019/08/14 05:20:53 UTC

J2000 position of star is 16:14:14.8 -16:01:59
Equinox of date position of star is 16:15:16.2 -16:04:39
Stellar brightness R=16.4, use SENSEUP=128
Star is 63 degrees from the moon. Moon is 98% illuminated.
TNO apparent brightness V=21.3

[RECON map]
TNO is 33.7 AU from the Sun and 33.5 AU from the Earth.
The TNO is moving 2.1 km/sec on the sky relative to the star, or, 0.3 arcsec/hr.
The 1-sigma error in the time of the event is 1159 seconds.
The 1-sigma cross-track error in the shadow position is 1300 km.
The sky-plane scale is 24275.9 km/arcsec.

The TNO has an absolute magnitude Hv=5.9
Diameter=398.1 km assuming a 5% albedo -- 189.3 sec chord
Diameter=162.5 km assuming a 30% albedo -- 77.3 sec chord
Dynamical classification is 3:2E
 
 
 
 
 
 

Star training set for 469987, (2019/08/14 05:21UT)
Object            RA         Dec     mag  sep  mel
Antares        16:30:36.8 -26:28:26  0.9 10.98  57
8Bet1Sco       16:06:34.8 -19:51:27  2.6  4.32  64
PPM 231511     16:20:07.0 -14:55:09  5.8  1.63  62
PPM 231439     16:17:00.7 -15:56:09  7.9  0.42  62
PPM 231375     16:14:32.4 -16:08:40  9.2  0.21  63
PPM 231406     16:15:27.1 -16:16:32 10.1  0.20  63
469987         16:15:21.9 -16:04:53 16.4        62
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 23.0 km RECON observability=0.7 and success probability=21.6%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Oroville 04:43:19 -12.8 AT Up 19.7 210.9 Really Low 04:28:19 - 04:58:19 1865
Tonasket 04:43:05 -13.0 AT Up 20.0 210.8 Really Low 04:28:05 - 04:58:05 1850
Okanogan 04:43:15 -13.1 AT Up 20.3 210.8 Low 04:28:15 - 04:58:15 1835
Manson/Chelan 04:43:33 -13.2 AT Up 20.9 210.4 Low 04:28:33 - 04:58:33 1827
Brewster 04:43:26 -13.2 AT Up 20.6 210.7 Low 04:28:26 - 04:58:26 1825
Entiat 04:43:29 -13.3 AT Up 21.1 210.4 Low 04:28:29 - 04:58:29 1816
Wenatchee 04:43:33 -13.4 AT Up 21.3 210.4 Low 04:28:33 - 04:58:33 1803
Ellensburg 04:43:26 -13.5 AT Up 21.8 210.2 Low 04:28:26 - 04:58:26 1785
Yakima 04:43:33 -13.8 AT Up 22.1 210.3 Low 04:28:33 - 04:58:33 1759
Toppenish/White Swan 04:43:31 -14.0 AT Up 22.2 210.5 Low 04:28:31 - 04:58:31 1738
The Dalles 04:43:47 -14.1 AT Up 23.2 209.9 Low 04:28:47 - 04:58:47 1720
Goldendale 04:43:40 -14.2 AT Up 22.9 210.2 Low 04:28:40 - 04:58:40 1719
Maupin 04:43:43 -14.4 AT Up 23.5 210.1 Low 04:28:43 - 04:58:43 1687
Pasco 04:43:03 -14.7 AT Up 21.9 211.6 Low 04:28:03 - 04:58:03 1676
George/Umatilla 04:42:58 -14.8 AT Up 22.3 211.5 Low 04:27:58 - 04:57:58 1663
Madras/Culver 04:43:44 -14.8 AT Up 24.0 210.2 Low 04:28:44 - 04:58:44 1652
Sisters 04:43:54 -14.7 AT Up 24.4 209.9 Low 04:28:54 - 04:58:54 1649
PNWRO 04:42:56 -15.0 AT Up 22.1 211.9 Low 04:27:56 - 04:57:56 1649
Redmond 04:43:44 -15.0 AT Up 24.3 210.2 Low 04:28:44 - 04:58:44 1630
Bend 04:43:45 -15.0 AT Up 24.6 210.2 Low 04:28:45 - 04:58:45 1622
Oregon Observatory 04:43:51 -15.1 AT Up 24.7 210.1 Low 04:28:51 - 04:58:51 1615
La Pine/Gilchrist 04:43:52 -15.2 AT Up 24.9 210.1 Low 04:28:52 - 04:58:52 1604
North Lake 04:43:37 -15.7 AT Up 25.1 210.7 Low 04:28:37 - 04:58:37 1547
Chiloquin 04:43:59 -15.6 AT Up 26.0 210.0 Low 04:28:59 - 04:58:59 1543
Klamath Falls 04:43:59 -15.9 AT Up 26.3 210.2 Low 04:28:59 - 04:58:59 1516
Paisley 04:43:29 -16.3 AT Up 25.5 211.2 Low 04:28:29 - 04:58:29 1493
Tulelake 04:43:54 -16.2 AT Up 26.4 210.5 Low 04:28:54 - 04:58:54 1483
Lakeview 04:43:23 -16.7 AT Up 25.8 211.5 Low 04:28:23 - 04:58:23 1448
Fall River/Burney 04:43:49 -16.8 AT Up 27.2 210.8 Low 04:28:49 - 04:58:49 1415
Cedarville 04:43:19 -17.2 AT Up 26.3 211.8 Low 04:28:19 - 04:58:19 1393
Susanville 04:43:31 -17.6 AT Up 27.5 211.7 Low 04:28:31 - 04:58:31 1335
Greenville 04:43:37 -17.6 AT Up 27.8 211.5 Low 04:28:37 - 04:58:37 1329
Gimple 04:43:38 -17.7 AT Up 27.8 211.6 Low 04:28:38 - 04:58:38 1325
Quincy 04:43:40 -17.7 AT Up 28.0 211.5 Low 04:28:40 - 04:58:40 1314
Portola 04:43:29 -18.1 Dark Up 27.9 212.0 Low 04:28:29 - 04:58:29 1283
Reno 04:43:11 -18.6 Dark Up 27.9 212.6 Low 04:28:11 - 04:58:11 1233
Carson City 04:43:18 -18.9 Dark Up 28.2 212.8 Low 04:28:18 - 04:58:18 1205
Gardnerville 04:43:10 -19.0 Dark Up 28.4 212.9 Low 04:28:10 - 04:58:10 1185
Yerington 04:42:54 -19.3 Dark Up 28.1 213.4 Low 04:27:54 - 04:57:54 1160
Hawthorne 04:42:43 -19.9 Dark Up 28.3 214.0 Low 04:27:43 - 04:57:43 1101
Lee Vining 04:42:54 -20.0 Dark Up 28.9 213.7 Low 04:27:54 - 04:57:54 1081
Bishop 04:42:37 -20.7 Dark Up 29.1 214.5 Low 04:27:37 - 04:57:37 1001
Tonopah 04:42:08 -21.0 Dark Up 28.1 215.4 Low 04:27:08 - 04:57:08 998
CPSLO 04:43:47 -20.7 Dark Up 31.7 213.3 Up 04:28:47 - 04:58:47 952
Lone Pine 04:42:30 -21.4 Dark Up 29.6 215.1 Low 04:27:30 - 04:57:30 926
Beatty 04:41:57 -21.9 Dark Up 28.8 216.1 Low 04:26:57 - 04:56:57 886
Indian Springs 04:41:31 -22.7 Dark Up 28.6 217.1 Low 04:26:31 - 04:56:31 808
Wildwood 04:42:57 -22.7 Dark Up 31.9 215.5 Up 04:27:57 - 04:57:57 755
Henderson 04:41:16 -23.5 Dark Up 28.8 217.9 Low 04:26:16 - 04:56:16 732
Searchlight/Boulder City 04:41:14 -23.9 Dark Up 29.2 218.2 Low 04:26:14 - 04:56:14 683
Laughlin/Bullhead City 04:41:04 -24.3 Dark Up 29.3 218.6 Low 04:26:04 - 04:56:04 642
Idyllwild 04:42:04 -24.0 Dark Up 31.3 217.3 Up 04:27:04 - 04:57:04 632
Patrick 04:40:47 -24.5 Dark Up 28.7 219.1 Low 04:25:47 - 04:55:47 627
Mohave Valley 04:41:05 -24.5 Dark Up 29.5 218.7 Low 04:26:05 - 04:56:05 620
Kingman/Dolan Springs 04:40:52 -24.5 Dark Up 29.0 219.0 Low 04:25:52 - 04:55:52 619
Niwot 04:37:34 -25.5 Dark Up 21.1 224.6 Low 04:22:34 - 04:52:34 603
Lake Havasu City 04:41:00 -24.9 Dark Up 29.7 219.0 Low 04:26:00 - 04:56:00 575
DCO 04:40:30 -25.1 Dark Up 28.6 219.8 Low 04:25:30 - 04:55:30 568
Parker 04:40:58 -25.1 Dark Up 29.9 219.2 Low 04:25:58 - 04:55:58 545
Calipatria 04:41:34 -25.1 Dark Up 31.3 218.5 Up 04:26:34 - 04:56:34 523
Blythe 04:41:10 -25.3 Dark Up 30.5 219.1 Up 04:26:10 - 04:56:10 517
Yuma 04:41:14 -25.9 Dark Up 31.2 219.5 Up 04:26:14 - 04:56:14 443

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 469987, (2019/08/14 05:21UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9 10.98  57
8Bet1Sco       16:05:26.2 -19:48:20  2.6  4.32  64
PPM 231511     16:19:00.4 -14:52:22  5.8  1.63  62
PPM 231439     16:15:53.7 -15:53:17  7.9  0.42  62
PPM 231375     16:13:25.3 -16:05:45  9.2  0.21  63
PPM 231406     16:14:20.0 -16:13:37 10.1  0.20  63
469987         16:14:14.8 -16:01:59 16.4        63
Positions are for J2000

Event circumstances last updated at 2017/12/06 19:12:05 UT

Marc W. Buie, Southwest Research Institute

RECON