RECON: TNO occultation with 469987

Event between (469987) 06HJ123 and star GA0720:05976964 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 16:15:17.9 -16:04:43
Stellar brightness G=16.5, 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 24276.1 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 16.5        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 22.1 km RECON observability=0.8 and success probability=1.6%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Penticton 05:08:09 -15.3 AT Up 17.0 216.5 Really Low 04:53:09 - 05:23:09 8816
Oroville 05:08:03 -15.8 AT Up 17.5 216.7 Really Low 04:53:03 - 05:23:03 8770
Tonasket 05:08:06 -16.0 AT Up 17.7 216.7 Really Low 04:53:06 - 05:23:06 8754
Okanogan 05:08:03 -16.1 AT Up 18.0 216.6 Really Low 04:53:03 - 05:23:03 8737
Manson/Chelan 05:08:15 -16.2 AT Up 18.6 216.3 Really Low 04:53:15 - 05:23:15 8726
Brewster 05:08:09 -16.3 AT Up 18.3 216.5 Really Low 04:53:09 - 05:23:09 8726
Entiat 05:08:16 -16.4 AT Up 18.8 216.2 Really Low 04:53:16 - 05:23:16 8714
Wenatchee 05:08:15 -16.5 AT Up 19.0 216.2 Really Low 04:53:15 - 05:23:15 8700
Ellensburg 05:08:24 -16.7 AT Up 19.4 216.1 Really Low 04:53:24 - 05:23:24 8680
Yakima 05:08:27 -17.0 AT Up 19.8 216.2 Really Low 04:53:27 - 05:23:27 8652
Toppenish/White Swan 05:08:27 -17.2 AT Up 19.9 216.4 Really Low 04:53:27 - 05:23:27 8629
Goldendale 05:08:31 -17.4 AT Up 20.5 216.1 Low 04:53:31 - 05:23:31 8608
The Dalles 05:08:51 -17.4 AT Up 20.8 215.9 Low 04:53:51 - 05:23:51 8608
Maupin 05:08:24 -17.7 AT Up 21.1 216.0 Low 04:53:24 - 05:23:24 8573
Pasco 05:07:45 -17.8 AT Up 19.5 217.4 Really Low 04:52:45 - 05:22:45 8567
George/Umatilla 05:07:56 -18.0 Dark Up 19.9 217.3 Really Low 04:52:56 - 05:22:56 8552
PNWRO 05:07:38 -18.1 Dark Up 19.6 217.7 Really Low 04:52:38 - 05:22:38 8540
Madras/Culver 05:08:51 -18.1 Dark Up 21.5 216.2 Low 04:53:51 - 05:23:51 8535
Sisters 05:08:38 -18.1 Dark Up 22.0 215.8 Low 04:53:38 - 05:23:38 8531
Redmond 05:08:41 -18.3 Dark Up 21.9 216.2 Low 04:53:41 - 05:23:41 8511
Bend 05:08:51 -18.4 Dark Up 22.1 216.2 Low 04:53:51 - 05:23:51 8502
Oregon Observatory 05:08:38 -18.4 Dark Up 22.3 216.0 Low 04:53:38 - 05:23:38 8495
La Pine/Gilchrist 05:08:38 -18.6 Dark Up 22.5 216.0 Low 04:53:38 - 05:23:38 8483
North Lake 05:08:44 -19.2 Dark Up 22.6 216.7 Low 04:53:44 - 05:23:44 8424
Chiloquin 05:08:57 -19.2 Dark Up 23.5 216.0 Low 04:53:57 - 05:23:57 8417
Klamath Falls 05:08:52 -19.4 Dark Up 23.8 216.2 Low 04:53:52 - 05:23:52 8388
Paisley 05:08:27 -19.7 Dark Up 22.9 217.1 Low 04:53:27 - 05:23:27 8367
Tulelake 05:08:45 -19.8 Dark Up 23.9 216.5 Low 04:53:45 - 05:23:45 8354
Lakeview 05:08:20 -20.2 Dark Up 23.2 217.4 Low 04:53:20 - 05:23:20 8320
Fall River/Burney 05:08:51 -20.4 Dark Up 24.5 216.9 Low 04:53:51 - 05:23:51 8282
Cedarville 05:08:23 -20.7 Dark Up 23.7 217.8 Low 04:53:23 - 05:23:23 8263
Susanville 05:08:24 -21.2 Dark Up 24.8 217.6 Low 04:53:24 - 05:23:24 8200
Greenville 05:08:31 -21.3 Dark Up 25.1 217.5 Low 04:53:31 - 05:23:31 8192
Gimple 05:08:41 -21.3 Dark Up 25.0 217.6 Low 04:53:41 - 05:23:41 8188
Quincy 05:08:37 -21.4 Dark Up 25.2 217.5 Low 04:53:37 - 05:23:37 8176
Portola 05:08:30 -21.7 Dark Up 25.1 218.0 Low 04:53:30 - 05:23:30 8144
Reno 05:08:16 -22.3 Dark Up 25.1 218.6 Low 04:53:16 - 05:23:16 8093
Carson City 05:08:13 -22.5 Dark Up 25.3 218.7 Low 04:53:13 - 05:23:13 8064
Gardnerville 05:08:16 -22.7 Dark Up 25.5 218.9 Low 04:53:16 - 05:23:16 8043
Yerington 05:07:56 -23.0 Dark Up 25.2 219.3 Low 04:52:56 - 05:22:56 8020
Hawthorne 05:07:48 -23.6 Dark Up 25.3 219.9 Low 04:52:48 - 05:22:48 7958
Lee Vining 05:07:56 -23.7 Dark Up 26.0 219.6 Low 04:52:56 - 05:22:56 7936
Tonopah 05:07:13 -24.6 Dark Up 25.0 221.2 Low 04:52:13 - 05:22:13 7854
Bishop 05:07:48 -24.5 Dark Up 26.1 220.5 Low 04:52:48 - 05:22:48 7853
CPSLO 05:08:51 -24.7 Dark Up 28.7 219.3 Low 04:53:51 - 05:23:51 7796
Lone Pine 05:07:40 -25.2 Dark Up 26.5 221.0 Low 04:52:40 - 05:22:40 7776
Beatty 05:06:59 -25.6 Dark Up 25.7 221.9 Low 04:51:59 - 05:21:59 7738
Indian Springs 05:06:45 -26.5 Dark Up 25.4 222.9 Low 04:51:45 - 05:21:45 7659
Wildwood 05:08:14 -26.7 Dark Up 28.6 221.5 Low 04:53:14 - 05:23:14 7595
Henderson 05:06:31 -27.2 Dark Up 25.4 223.6 Low 04:51:31 - 05:21:31 7582
Searchlight/Boulder City 05:06:45 -27.7 Dark Up 25.8 223.9 Low 04:51:45 - 05:21:45 7531
Laughlin/Bullhead City 05:06:20 -28.0 Dark Up 25.8 224.2 Low 04:51:20 - 05:21:20 7489
Niwot 05:02:58 -28.5 Dark Up 17.5 229.9 Really Low 04:47:58 - 05:17:58 7480
Patrick 05:06:10 -28.2 Dark Up 25.3 224.7 Low 04:51:10 - 05:21:10 7475
Idyllwild 05:07:20 -27.9 Dark Up 27.9 223.1 Low 04:52:20 - 05:22:20 7472
Kingman/Dolan Springs 05:06:31 -28.3 Dark Up 25.5 224.7 Low 04:51:31 - 05:21:31 7466
Mohave Valley 05:06:24 -28.2 Dark Up 26.0 224.3 Low 04:51:24 - 05:21:24 7465
Lake Havasu City 05:06:10 -28.6 Dark Up 26.2 224.6 Low 04:51:10 - 05:21:10 7419
DCO 05:05:49 -28.8 Dark Up 25.1 225.4 Low 04:50:49 - 05:20:49 7416
Parker 05:06:10 -28.9 Dark Up 26.4 224.8 Low 04:51:10 - 05:21:10 7388
Calipatria 05:06:45 -29.0 Dark Up 27.8 224.2 Low 04:51:45 - 05:21:45 7362
Blythe 05:06:27 -29.1 Dark Up 26.9 224.8 Low 04:51:27 - 05:21:27 7358
Yuma 05:06:45 -29.8 Dark Up 27.6 225.2 Low 04:51:45 - 05:21:45 7280

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 -16:13:38 10.1  0.20  63
469987         16:14:14.8 -16:01:59 16.5        63
Positions are for J2000

Event circumstances last updated at 2018/06/12 02:27:10 UT

Marc W. Buie, Southwest Research Institute

RECON