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 16:15:15.3 -16:04:36
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 902 seconds.
The 1-sigma cross-track error in the shadow position is 1255 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 1.0 sigma about the mid-time.
The median site spacing is 23.5 km RECON observability=0.7 and success probability=22.2%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Oroville 04:43:08 -12.8 AT Up 19.8 210.8 Really Low 04:28:08 - 04:58:08 1854
Tonasket 04:43:08 -13.0 AT Up 20.0 210.9 Really Low 04:28:08 - 04:58:08 1839
Okanogan 04:43:08 -13.1 AT Up 20.3 210.8 Low 04:28:08 - 04:58:08 1823
Manson/Chelan 04:43:22 -13.2 AT Up 20.9 210.4 Low 04:28:22 - 04:58:22 1815
Brewster 04:43:12 -13.2 AT Up 20.6 210.7 Low 04:28:12 - 04:58:12 1814
Entiat 04:43:19 -13.3 AT Up 21.1 210.3 Low 04:28:19 - 04:58:19 1804
Wenatchee 04:43:26 -13.4 AT Up 21.3 210.3 Low 04:28:26 - 04:58:26 1791
Ellensburg 04:43:26 -13.5 AT Up 21.8 210.2 Low 04:28:26 - 04:58:26 1773
Yakima 04:43:26 -13.8 AT Up 22.1 210.3 Low 04:28:26 - 04:58:26 1747
Toppenish/White Swan 04:43:26 -14.0 AT Up 22.3 210.5 Low 04:28:26 - 04:58:26 1726
The Dalles 04:43:40 -14.1 AT Up 23.2 209.9 Low 04:28:40 - 04:58:40 1708
Goldendale 04:43:31 -14.2 AT Up 22.9 210.2 Low 04:28:31 - 04:58:31 1707
Maupin 04:43:33 -14.4 AT Up 23.5 210.1 Low 04:28:33 - 04:58:33 1675
Pasco 04:42:54 -14.7 AT Up 22.0 211.6 Low 04:27:54 - 04:57:54 1663
George/Umatilla 04:42:57 -14.8 AT Up 22.3 211.5 Low 04:27:57 - 04:57:57 1650
Madras/Culver 04:43:38 -14.7 AT Up 24.0 210.2 Low 04:28:38 - 04:58:38 1640
PNWRO 04:42:50 -15.0 AT Up 22.1 211.8 Low 04:27:50 - 04:57:50 1637
Sisters 04:43:47 -14.7 AT Up 24.4 209.9 Low 04:28:47 - 04:58:47 1637
Redmond 04:43:37 -14.9 AT Up 24.3 210.2 Low 04:28:37 - 04:58:37 1618
Bend 04:43:36 -15.0 AT Up 24.6 210.1 Low 04:28:36 - 04:58:36 1609
Oregon Observatory 04:43:33 -15.0 AT Up 24.8 210.0 Low 04:28:33 - 04:58:33 1604
La Pine/Gilchrist 04:43:44 -15.1 AT Up 25.0 210.1 Low 04:28:44 - 04:58:44 1592
North Lake 04:43:26 -15.7 AT Up 25.1 210.7 Low 04:28:26 - 04:58:26 1535
Chiloquin 04:43:54 -15.6 AT Up 26.0 210.0 Low 04:28:54 - 04:58:54 1531
Klamath Falls 04:43:54 -15.9 AT Up 26.3 210.2 Low 04:28:54 - 04:58:54 1503
Paisley 04:43:19 -16.2 AT Up 25.5 211.1 Low 04:28:19 - 04:58:19 1481
Tulelake 04:43:40 -16.2 AT Up 26.4 210.5 Low 04:28:40 - 04:58:40 1471
Lakeview 04:43:17 -16.7 AT Up 25.8 211.4 Low 04:28:17 - 04:58:17 1436
Fall River/Burney 04:43:41 -16.8 AT Up 27.2 210.8 Low 04:28:41 - 04:58:41 1402
Cedarville 04:43:13 -17.2 AT Up 26.3 211.8 Low 04:28:13 - 04:58:13 1381
Susanville 04:43:25 -17.6 AT Up 27.5 211.6 Low 04:28:25 - 04:58:25 1323
Greenville 04:43:31 -17.6 AT Up 27.8 211.4 Low 04:28:31 - 04:58:31 1316
Gimple 04:43:29 -17.6 AT Up 27.8 211.5 Low 04:28:29 - 04:58:29 1312
Quincy 04:43:31 -17.7 AT Up 28.0 211.5 Low 04:28:31 - 04:58:31 1301
Portola 04:43:22 -18.1 Dark Up 27.9 212.0 Low 04:28:22 - 04:58:22 1270
Reno 04:43:03 -18.6 Dark Up 27.9 212.6 Low 04:28:03 - 04:58:03 1220
Carson City 04:43:04 -18.8 Dark Up 28.2 212.7 Low 04:28:04 - 04:58:04 1192
Gardnerville 04:43:03 -19.0 Dark Up 28.4 212.9 Low 04:28:03 - 04:58:03 1172
Yerington 04:42:49 -19.3 Dark Up 28.1 213.4 Low 04:27:49 - 04:57:49 1148
Hawthorne 04:42:36 -19.9 Dark Up 28.3 214.0 Low 04:27:36 - 04:57:36 1088
Lee Vining 04:42:47 -19.9 Dark Up 29.0 213.7 Low 04:27:47 - 04:57:47 1068
Bishop 04:42:31 -20.7 Dark Up 29.2 214.5 Low 04:27:31 - 04:57:31 987
Tonopah 04:41:58 -20.9 Dark Up 28.1 215.3 Low 04:26:58 - 04:56:58 985
CPSLO 04:43:36 -20.7 Dark Up 31.8 213.2 Up 04:28:36 - 04:58:36 938
Lone Pine 04:42:24 -21.4 Dark Up 29.6 215.1 Low 04:27:24 - 04:57:24 912
Beatty 04:41:49 -21.9 Dark Up 28.9 216.1 Low 04:26:49 - 04:56:49 873
Indian Springs 04:41:23 -22.7 Dark Up 28.7 217.1 Low 04:26:23 - 04:56:23 795
Wildwood 04:42:43 -22.6 Dark Up 31.9 215.5 Up 04:27:43 - 04:57:43 741
Henderson 04:41:05 -23.5 Dark Up 28.8 217.9 Low 04:26:05 - 04:56:05 719
Searchlight/Boulder City 04:41:07 -23.9 Dark Up 29.2 218.1 Low 04:26:07 - 04:56:07 670
Laughlin/Bullhead City 04:40:58 -24.3 Dark Up 29.3 218.5 Low 04:25:58 - 04:55:58 628
Idyllwild 04:41:56 -24.0 Dark Up 31.4 217.3 Up 04:26:56 - 04:56:56 618
Patrick 04:40:39 -24.5 Dark Up 28.8 219.0 Low 04:25:39 - 04:55:39 614
Mohave Valley 04:40:58 -24.4 Dark Up 29.5 218.6 Low 04:25:58 - 04:55:58 606
Kingman/Dolan Springs 04:40:44 -24.5 Dark Up 29.0 219.0 Low 04:25:44 - 04:55:44 605
Niwot 04:37:31 -25.5 Dark Up 21.1 224.6 Low 04:22:31 - 04:52:31 591
Lake Havasu City 04:40:54 -24.8 Dark Up 29.7 219.0 Low 04:25:54 - 04:55:54 561
DCO 04:40:22 -25.1 Dark Up 28.7 219.7 Low 04:25:22 - 04:55:22 554
Parker 04:40:53 -25.1 Dark Up 29.9 219.1 Low 04:25:53 - 04:55:53 531
Calipatria 04:41:28 -25.0 Dark Up 31.3 218.5 Up 04:26:28 - 04:56:28 509
Blythe 04:41:01 -25.3 Dark Up 30.5 219.1 Up 04:26:01 - 04:56:01 503
Yuma 04:41:04 -25.8 Dark Up 31.2 219.4 Up 04:26:04 - 04:56:04 428

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 2017/09/01 17:00:08 UT

Marc W. Buie, Southwest Research Institute

RECON