RECON: TNO occultation with 91205

Event between (91205) 98US43 and star GA1060:01253716 with event index number of 363789

Geocentric closest approach at 2020/10/27 11:16:39 UTC

J2000 position of star is 05:46:26.6 +16:11:10
Equinox of date position of star is 05:47:31.8 +16:11:31
Stellar brightness G=16.7, use SENSEUP=128
Star is 97 degrees from the moon. Moon is 85% illuminated.
TNO apparent brightness V=23.9

[RECON map]
TNO is 37.8 AU from the Sun and 37.2 AU from the Earth.
The TNO is moving 14.3 km/sec on the sky relative to the star, or, 1.9 arcsec/hr.
The 1-sigma error in the time of the event is 955 seconds.
The 1-sigma cross-track error in the shadow position is 3966 km.
The sky-plane scale is 26986.5 km/arcsec.

The TNO has an absolute magnitude Hv=8.0
Diameter=151.4 km assuming a 5% albedo -- 10.6 sec chord
Diameter=61.8 km assuming a 30% albedo -- 4.3 sec chord
Dynamical classification is 3:2E
 
 
 
 
 
 

Star training set for 91205, (2020/10/27 11:17UT)
Object            RA         Dec     mag  sep  mel
Betelgeuse     05:56:18.0 +07:24:33  0.4  9.03  98
Bellatrix      05:26:14.9 +06:22:01  1.6 11.13  90
126 Tau        05:42:29.9 +16:32:35  4.6  1.28  96
PPM 121346     05:46:05.3 +16:05:36  7.1  0.39  96
PPM 121389     05:48:13.5 +15:51:44  8.7  0.36  97
91205          05:47:38.7 +16:11:34 16.7        97
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 0.9 sigma about the mid-time.
The median site spacing is 20.9 km RECON observability=1.0 and success probability=12.0%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Summerland 11:15:40 -33.3 Dark Down 56.3 178.0 Up 11:00:40 - 11:30:40 2583
Kelowna 11:15:38 -33.0 Dark Down 56.3 178.6 Up 11:00:38 - 11:30:38 2580
Penticton 11:15:39 -33.3 Dark Down 56.6 178.3 Up 11:00:39 - 11:30:39 2551
Okanagan Falls 11:15:40 -33.3 Dark Down 56.8 178.3 Up 11:00:40 - 11:30:40 2535
Oliver 11:15:40 -33.4 Dark Down 57.0 178.3 Up 11:00:40 - 11:30:40 2520
Anarchist Mountain Observatory 11:15:39 -33.3 Dark Down 57.2 178.6 Up 11:00:39 - 11:30:39 2500
Oroville 11:15:40 -33.4 Dark Down 57.2 178.5 Up 11:00:40 - 11:30:40 2495
Tonasket 11:15:40 -33.5 Dark Down 57.5 178.5 Up 11:00:40 - 11:30:40 2474
Okanogan 11:15:42 -33.7 Dark Down 57.8 178.2 Up 11:00:42 - 11:30:42 2447
Brewster 11:15:43 -33.9 Dark Down 58.1 177.8 Up 11:00:43 - 11:30:43 2427
Manson/Chelan 11:15:46 -34.2 Dark Down 58.3 177.2 Up 11:00:46 - 11:30:46 2415
Entiat 11:15:46 -34.3 Dark Down 58.5 177.0 Up 11:00:46 - 11:30:46 2397
Wenatchee 11:15:47 -34.4 Dark Down 58.7 176.8 Up 11:00:47 - 11:30:47 2376
Ellensburg 11:15:49 -34.7 Dark Down 59.1 176.4 Up 11:00:49 - 11:30:49 2343
Yakima 11:15:50 -34.9 Dark Down 59.6 176.3 Up 11:00:50 - 11:30:50 2306
Toppenish/White Swan 11:15:50 -34.8 Dark Down 59.8 176.6 Up 11:00:50 - 11:30:50 2282
Pasco 11:15:43 -34.1 Dark Down 59.9 179.0 Up 11:00:43 - 11:30:43 2244
Goldendale 11:15:53 -35.3 Dark Down 60.3 175.8 Up 11:00:53 - 11:30:53 2241
The Dalles 11:15:55 -35.6 Dark Down 60.5 175.0 Up 11:00:55 - 11:30:55 2228
George/Umatilla 11:15:45 -34.3 Dark Down 60.3 178.6 Up 11:00:45 - 11:30:45 2218
PNWRO 11:15:43 -34.0 Dark Down 60.2 179.4 Up 11:00:43 - 11:30:43 2217
Maupin 11:15:55 -35.7 Dark Down 60.9 175.2 Up 11:00:55 - 11:30:55 2187
Madras/Culver 11:15:57 -35.9 Dark Down 61.5 175.0 Up 11:00:57 - 11:30:57 2137
Sisters 11:16:00 -36.3 Dark Down 61.8 174.1 Up 11:01:00 - 11:31:00 2116
Redmond 11:15:58 -36.0 Dark Down 61.8 174.9 Up 11:00:58 - 11:30:58 2105
Bend 11:15:59 -36.2 Dark Down 62.0 174.6 Up 11:00:59 - 11:30:59 2088
Oregon Observatory 11:16:00 -36.3 Dark Down 62.2 174.3 Up 11:01:00 - 11:31:00 2075
La Pine/Gilchrist 11:16:01 -36.4 Dark Down 62.4 174.1 Up 11:01:01 - 11:31:01 2057
North Lake 11:15:59 -36.1 Dark Down 62.9 175.3 Up 11:00:59 - 11:30:59 2002
Chiloquin 11:16:05 -37.0 Dark Down 63.5 173.2 Up 11:01:05 - 11:31:05 1960
Paisley 11:15:58 -36.1 Dark Down 63.4 176.0 Up 11:00:58 - 11:30:58 1942
Klamath Falls 11:16:05 -37.1 Dark Down 63.8 173.3 Up 11:01:05 - 11:31:05 1926
Tulelake 11:16:05 -36.9 Dark Down 64.1 173.9 Up 11:01:05 - 11:31:05 1893
Lakeview 11:15:58 -36.1 Dark Down 64.0 176.3 Up 11:00:58 - 11:30:58 1889
Cedarville 11:15:58 -36.1 Dark Down 64.6 176.6 Up 11:00:58 - 11:30:58 1822
Fall River/Burney 11:16:06 -37.1 Dark Down 65.0 173.8 Up 11:01:06 - 11:31:06 1804
Susanville 11:16:03 -36.8 Dark Down 65.7 175.4 Up 11:01:03 - 11:31:03 1726
Greenville 11:16:05 -37.1 Dark Down 66.0 174.7 Up 11:01:05 - 11:31:05 1706
Gimple 11:16:05 -37.0 Dark Down 66.0 174.9 Up 11:01:05 - 11:31:05 1704
Quincy 11:16:06 -37.1 Dark Down 66.2 174.6 Up 11:01:06 - 11:31:06 1687
Portola 11:16:03 -36.8 Dark Down 66.3 175.7 Up 11:01:03 - 11:31:03 1663
Reno 11:16:00 -36.4 Dark Down 66.6 177.2 Up 11:01:00 - 11:31:00 1622
Carson City 11:16:01 -36.4 Dark Down 67.0 177.2 Up 11:01:01 - 11:31:01 1586
Gardnerville 11:16:01 -36.5 Dark Down 67.2 177.3 Up 11:01:01 - 11:31:01 1561
Yerington 11:15:58 -36.0 Dark Down 67.2 178.8 Up 11:00:58 - 11:30:58 1552
Hawthorne 11:15:55 -35.7 Dark Down 67.7 180.0 Up 11:00:55 - 11:30:55 1494
Lee Vining 11:15:59 -36.2 Dark Down 68.2 178.8 Up 11:00:59 - 11:30:59 1449
Tonopah 11:15:49 -34.8 Dark Down 68.1 183.6 Up 11:00:49 - 11:30:49 1414
Niwot 11:14:37 -25.5 Dark Down 63.5 209.3 Up 10:59:37 - 11:29:37 1377
Bishop 11:15:56 -35.8 Dark Down 68.8 180.7 Up 11:00:56 - 11:30:56 1373
Lone Pine 11:15:56 -35.7 Dark Down 69.6 181.6 Up 11:00:56 - 11:30:56 1289
Beatty 11:15:47 -34.6 Dark Down 69.2 185.0 Up 11:00:47 - 11:30:47 1288
Indian Springs 11:15:42 -33.8 Dark Down 69.4 188.0 Up 11:00:42 - 11:30:42 1230
CPSLO 11:16:14 -37.9 Dark Down 70.8 174.3 Up 11:01:14 - 11:31:14 1222
Henderson 11:15:39 -33.4 Dark Down 69.9 190.1 Up 11:00:39 - 11:30:39 1160
Searchlight/Boulder City 11:15:39 -33.4 Dark Down 70.4 190.6 Up 11:00:39 - 11:30:39 1100
Patrick 11:15:32 -32.6 Dark Down 70.3 193.5 Up 11:00:32 - 11:30:32 1071
Laughlin/Bullhead City 11:15:37 -33.2 Dark Down 70.7 191.7 Up 11:00:37 - 11:30:37 1062
Kingman/Dolan Springs 11:15:34 -32.8 Dark Down 70.6 193.1 Up 11:00:34 - 11:30:34 1053
Wildwood 11:16:03 -36.5 Dark Down 72.1 180.2 Up 11:01:03 - 11:31:03 1048
Mohave Valley 11:15:38 -33.2 Dark Down 71.0 191.9 Up 11:00:38 - 11:30:38 1034
DCO 11:15:29 -32.1 Dark Down 70.5 195.6 Up 11:00:29 - 11:30:29 1024
Lake Havasu City 11:15:37 -33.1 Dark Down 71.3 192.8 Up 11:00:37 - 11:30:37 987
Idyllwild 11:15:53 -35.1 Dark Down 72.4 186.1 Up 11:00:53 - 11:30:53 966
Parker 11:15:37 -33.1 Dark Down 71.6 193.2 Up 11:00:37 - 11:30:37 951
Blythe 11:15:40 -33.4 Dark Down 72.2 192.7 Up 11:00:40 - 11:30:40 904
Calipatria 11:15:47 -34.2 Dark Down 72.8 190.1 Up 11:00:47 - 11:30:47 875
Yuma 11:15:42 -33.5 Dark Down 73.1 193.2 Up 11:00:42 - 11:30:42 809

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 91205, (2020/10/27 11:17UT)
Object            RA         Dec     mag  sep  mel
Betelgeuse     05:55:10.3 +07:24:26  0.4  9.03  98
Bellatrix      05:25:07.8 +06:20:58  1.6 11.13  90
126 Tau        05:41:17.7 +16:32:02  4.6  1.28  96
PPM 121346     05:44:53.2 +16:05:10  7.1  0.39  96
PPM 121389     05:47:01.6 +15:51:21  8.7  0.36  97
91205          05:46:26.6 +16:11:10 16.7        97
Positions are for J2000

Event circumstances last updated at 2018/10/27 20:52:59 UT

Marc W. Buie, Southwest Research Institute

RECON