RECON: TNO occultation with 503858

Event between (503858) 98HQ151 and star GA0760:16665207 with event index number of 326856

Geocentric closest approach at 2019/07/11 07:01:10 UTC

J2000 position of star is 18:40:14.6 -13:25:20
Equinox of date position of star is 18:41:19.2 -13:24:13
Stellar brightness G=15.6, use SENSEUP=128
Star is 57 degrees from the moon. Moon is 70% illuminated.
TNO apparent brightness V=23.9

[RECON map]
TNO is 32.5 AU from the Sun and 31.5 AU from the Earth.
The TNO is moving 23.5 km/sec on the sky relative to the star, or, 3.7 arcsec/hr.
The 1-sigma error in the time of the event is 269 seconds.
The 1-sigma cross-track error in the shadow position is 1743 km.
The sky-plane scale is 22818.7 km/arcsec.

The TNO has an absolute magnitude Hv=8.8
Diameter=104.7 km assuming a 5% albedo -- 4.5 sec chord
Diameter=42.8 km assuming a 30% albedo -- 1.8 sec chord
Dynamical classification is 3:2E
 
 
 
 
 
 

Star training set for 503858, (2019/07/11 07:01UT)
Object            RA         Dec     mag  sep  mel
Antares        16:30:36.5 -26:28:25  0.9 33.26  29
Nunki          18:56:28.5 -26:16:15  2.0 13.35  61
PPM 234707     18:34:46.0 -14:50:15  6.1  2.15  56
PPM 234877     18:41:53.4 -13:18:52  8.5  0.16  58
PPM 234871     18:41:31.2 -13:23:26  9.5  0.04  57
503858         18:41:20.8 -13:24:11 15.6        58
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 3.4 sigma about the mid-time.
The median site spacing is 13.4 km RECON observability=1.0 and success probability=16.0%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Kelowna 07:01:09 -16.7 AT Up 26.5 174.3 Low 06:46:09 - 07:16:09 -590
Summerland 07:01:10 -16.7 AT Up 26.5 173.9 Low 06:46:10 - 07:16:10 -591
Penticton 07:01:10 -17.0 AT Up 26.9 174.1 Low 06:46:10 - 07:16:10 -608
Okanagan Falls 07:01:10 -17.2 AT Up 27.0 174.1 Low 06:46:10 - 07:16:10 -617
Oliver 07:01:10 -17.3 AT Up 27.2 174.1 Low 06:46:10 - 07:16:10 -625
Anarchist Mountain Observatory 07:01:10 -17.5 AT Up 27.4 174.3 Low 06:46:10 - 07:16:10 -635
Oroville 07:01:10 -17.6 AT Up 27.5 174.2 Low 06:46:10 - 07:16:10 -638
Tonasket 07:01:10 -17.8 AT Up 27.7 174.2 Low 06:46:10 - 07:16:10 -650
Okanogan 07:01:11 -18.1 Dark Up 28.0 174.0 Low 06:46:11 - 07:16:11 -667
Brewster 07:01:11 -18.4 Dark Up 28.3 173.8 Low 06:46:11 - 07:16:11 -681
Manson/Chelan 07:01:13 -18.5 Dark Up 28.5 173.4 Low 06:46:13 - 07:16:13 -690
Entiat 07:01:13 -18.7 Dark Up 28.7 173.3 Low 06:46:13 - 07:16:13 -702
Wenatchee 07:01:13 -18.9 Dark Up 28.9 173.1 Low 06:46:13 - 07:16:13 -715
Ellensburg 07:01:14 -19.3 Dark Up 29.3 172.9 Low 06:46:14 - 07:16:14 -736
Yakima 07:01:15 -19.7 Dark Up 29.7 172.8 Low 06:46:15 - 07:16:15 -759
Toppenish/White Swan 07:01:14 -19.9 Dark Up 29.9 173.0 Low 06:46:14 - 07:16:14 -771
Pasco 07:01:10 -20.2 Dark Up 30.2 174.4 Up 06:46:10 - 07:16:10 -783
PNWRO 07:01:10 -20.5 Dark Up 30.4 174.6 Up 06:46:10 - 07:16:10 -797
Goldendale 07:01:16 -20.3 Dark Up 30.5 172.5 Up 06:46:16 - 07:16:16 -800
George/Umatilla 07:01:11 -20.5 Dark Up 30.5 174.1 Up 06:46:11 - 07:16:11 -800
The Dalles 07:01:17 -20.5 Dark Up 30.6 172.1 Up 06:46:17 - 07:16:17 -812
Maupin 07:01:17 -20.9 Dark Up 31.1 172.1 Up 06:46:17 - 07:16:17 -836
Madras/Culver 07:01:18 -21.4 Dark Up 31.6 172.1 Up 06:46:18 - 07:16:18 -867
Sisters 07:01:20 -21.6 Dark Up 31.9 171.5 Up 06:46:20 - 07:16:20 -885
Redmond 07:01:18 -21.8 Dark Up 32.0 172.0 Up 06:46:18 - 07:16:18 -888
Bend 07:01:19 -21.9 Dark Up 32.2 171.8 Up 06:46:19 - 07:16:19 -900
Oregon Observatory 07:01:19 -22.1 Dark Up 32.3 171.6 Up 06:46:19 - 07:16:19 -910
La Pine/Gilchrist 07:01:19 -22.2 Dark Up 32.5 171.5 Up 06:46:19 - 07:16:19 -922
North Lake 07:01:18 -22.8 Dark Up 33.0 172.2 Up 06:46:18 - 07:16:18 -950
Paisley 07:01:17 -23.4 Dark Up 33.6 172.6 Up 06:46:17 - 07:16:17 -985
Chiloquin 07:01:21 -23.2 Dark Up 33.6 171.0 Up 06:46:21 - 07:16:21 -988
Klamath Falls 07:01:21 -23.6 Dark Up 33.9 171.1 Up 06:46:21 - 07:16:21 -1010
Lakeview 07:01:16 -23.9 Dark Up 34.1 172.7 Up 06:46:16 - 07:16:16 -1017
Tulelake 07:01:21 -23.9 Dark Up 34.2 171.4 Up 06:46:21 - 07:16:21 -1027
Cedarville 07:01:16 -24.6 Dark Up 34.8 172.9 Up 06:46:16 - 07:16:16 -1059
Fall River/Burney 07:01:21 -24.8 Dark Up 35.1 171.4 Up 06:46:21 - 07:16:21 -1085
Susanville 07:01:18 -25.6 Dark Up 35.8 172.2 Up 06:46:18 - 07:16:18 -1128
Greenville 07:01:20 -25.8 Dark Up 36.1 171.8 Up 06:46:20 - 07:16:20 -1145
Gimple 07:01:19 -25.8 Dark Up 36.1 171.9 Up 06:46:19 - 07:16:19 -1146
Quincy 07:01:20 -25.9 Dark Up 36.3 171.8 Up 06:46:20 - 07:16:20 -1158
Portola 07:01:18 -26.2 Dark Up 36.4 172.4 Up 06:46:18 - 07:16:18 -1169
Reno 07:01:16 -26.6 Dark Up 36.8 173.1 Up 06:46:16 - 07:16:16 -1189
Carson City 07:01:16 -26.9 Dark Up 37.1 173.1 Up 06:46:16 - 07:16:16 -1213
Yerington 07:01:14 -27.2 Dark Up 37.4 173.9 Up 06:46:14 - 07:16:14 -1229
Gardnerville 07:01:16 -27.2 Dark Up 37.4 173.2 Up 06:46:16 - 07:16:16 -1229
Niwot 07:00:23 -27.7 Dark Up 35.9 190.6 Up 06:45:23 - 07:15:23 -1248
SwRI 07:00:24 -27.9 Dark Up 36.0 190.5 Up 06:45:24 - 07:15:24 -1254
Hawthorne 07:01:12 -27.8 Dark Up 37.9 174.5 Up 06:46:12 - 07:16:12 -1262
Lee Vining 07:01:14 -28.2 Dark Up 38.4 173.8 Up 06:46:14 - 07:16:14 -1299
Tonopah 07:01:07 -28.5 Dark Up 38.4 176.2 Up 06:46:07 - 07:16:07 -1301
Bishop 07:01:12 -29.0 Dark Up 39.1 174.7 Up 06:46:12 - 07:16:12 -1343
Beatty 07:01:06 -29.7 Dark Up 39.6 176.7 Up 06:46:06 - 07:16:06 -1384
Lone Pine 07:01:11 -29.8 Dark Up 39.8 175.0 Up 06:46:11 - 07:16:11 -1399
Indian Springs 07:01:02 -30.3 Dark Up 40.0 178.0 Up 06:46:02 - 07:16:02 -1413
Henderson 07:01:00 -30.9 Dark Up 40.5 178.9 Up 06:46:00 - 07:16:00 -1456
CPSLO 07:01:21 -30.4 Dark Up 40.9 171.7 Up 06:46:21 - 07:16:21 -1480
Searchlight/Boulder City 07:00:59 -31.5 Dark Up 41.1 178.9 Up 06:45:59 - 07:15:59 -1498
Patrick 07:00:55 -31.7 Dark Up 41.2 180.3 Up 06:45:55 - 07:15:55 -1508
Laughlin/Bullhead City 07:00:58 -31.8 Dark Up 41.4 179.4 Up 06:45:58 - 07:15:58 -1522
Kingman/Dolan Springs 07:00:56 -31.9 Dark Up 41.4 180.0 Up 06:45:56 - 07:15:56 -1523
DCO 07:00:53 -32.1 Dark Up 41.5 181.2 Up 06:45:53 - 07:15:53 -1535
Mohave Valley 07:00:58 -32.1 Dark Up 41.7 179.4 Up 06:45:58 - 07:15:58 -1542
Lake Havasu City 07:00:57 -32.5 Dark Up 42.1 179.7 Up 06:45:57 - 07:15:57 -1573
Wildwood 07:01:14 -32.1 Dark Up 42.3 174.1 Up 06:46:14 - 07:16:14 -1578
Parker 07:00:57 -32.9 Dark Up 42.4 179.7 Up 06:45:57 - 07:15:57 -1599
Idyllwild 07:01:07 -32.8 Dark Up 42.8 176.6 Up 06:46:07 - 07:16:07 -1615
Blythe 07:00:58 -33.3 Dark Up 43.0 179.3 Up 06:45:58 - 07:15:58 -1637
Calipatria 07:01:03 -33.6 Dark Up 43.4 178.1 Up 06:46:03 - 07:16:03 -1668
Yuma 07:00:59 -34.2 Dark Up 43.9 179.3 Up 06:45:59 - 07:15:59 -1707

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 503858, (2019/07/11 07:01UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9 33.26  29
Nunki          18:55:15.9 -26:17:49  2.0 13.35  61
PPM 234707     18:33:39.1 -14:51:14  6.1  2.15  56
PPM 234877     18:40:47.3 -13:20:02  8.5  0.16  58
PPM 234871     18:40:25.0 -13:24:36  9.5  0.04  57
503858         18:40:14.6 -13:25:20 15.6        57
Positions are for J2000

Event circumstances last updated at 2019/01/29 03:44:16 UT

Marc W. Buie, Southwest Research Institute

RECON