RECON: TNO occultation with 342842

Event between (342842) 08YB3 and star GA1400:05609634 with event index number of 1007454

Geocentric closest approach at 2020/11/18 02:49:51 UTC

J2000 position of star is 19:50:04.0 +50:56:20
Equinox of date position of star is 19:50:34.8 +50:59:17
Stellar brightness G=11.2, use SENSEUP=8
Star is 78 degrees from the moon. Moon is 12% illuminated.
TNO apparent brightness V=21.0

[RECON map]
TNO is 13.5 AU from the Sun and 13.5 AU from the Earth.
The TNO is moving 33.8 km/sec on the sky relative to the star, or, 12.4 arcsec/hr.
The 1-sigma error in the time of the event is 39 seconds.
The 1-sigma cross-track error in the shadow position is 816 km.
The sky-plane scale is 9779.2 km/arcsec.

The TNO has an absolute magnitude Hv=9.3
Diameter=83.2 km assuming a 5% albedo -- 2.5 sec chord
Diameter=34.0 km assuming a 30% albedo -- 1.0 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 

Star training set for 342842, (2020/11/18 02:50UT)
Object            RA         Dec     mag  sep  mel
Deneb          20:42:08.7 +45:21:21  1.3 10.25  76
PPM 037948     19:57:19.5 +50:57:35  6.3  1.05  78
PPM 037860     19:52:07.2 +50:42:33  8.4  0.37  78
PPM 037798     19:48:45.9 +50:52:34 10.1  0.32  78
342842         19:50:37.7 +50:59:34 11.2        78
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 5.0 sigma about the mid-time.
The median site spacing is 3.7 km RECON observability=1.0 and success probability=15.4%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Niwot 02:50:31 -35.9 Dark Down 49.4 305.3 Up 02:46:46 - 02:54:17 2279
SwRI 02:50:31 -35.9 Dark Down 49.4 305.4 Up 02:46:46 - 02:54:17 2274
DCO 02:50:52 -29.7 Dark Up 51.3 309.8 Up 02:47:07 - 02:54:38 1762
Patrick 02:50:52 -29.1 Dark Up 51.9 309.6 Up 02:47:06 - 02:54:37 1706
Kingman/Dolan Springs 02:50:53 -29.0 Dark Up 51.9 309.8 Up 02:47:07 - 02:54:38 1692
Parker 02:50:56 -28.7 Dark Up 51.4 310.9 Up 02:47:10 - 02:54:41 1677
Lake Havasu City 02:50:55 -28.7 Dark Up 51.6 310.5 Up 02:47:09 - 02:54:40 1674
Blythe 02:50:58 -28.4 Dark Up 51.2 311.4 Up 02:47:12 - 02:54:43 1655
Mohave Valley 02:50:54 -28.5 Dark Up 52.0 310.2 Up 02:47:08 - 02:54:39 1654
Yuma 02:51:00 -28.3 Dark Up 50.6 312.2 Up 02:47:14 - 02:54:45 1653
Laughlin/Bullhead City 02:50:53 -28.5 Dark Up 52.2 309.9 Up 02:47:08 - 02:54:39 1652
Searchlight/Boulder City 02:50:52 -28.3 Dark Up 52.6 309.6 Up 02:47:07 - 02:54:38 1624
Henderson 02:50:51 -28.3 Dark Up 53.0 309.1 Up 02:47:05 - 02:54:36 1618
Calipatria 02:51:00 -27.6 Dark Up 51.4 312.0 Up 02:47:14 - 02:54:45 1580
Indian Springs 02:50:49 -27.7 Dark Up 53.8 308.6 Up 02:47:04 - 02:54:35 1562
Idyllwild 02:50:58 -26.7 Dark Up 52.6 311.6 Up 02:47:13 - 02:54:44 1485
Beatty 02:50:49 -26.9 Dark Up 54.7 308.3 Up 02:47:04 - 02:54:35 1477
Tonopah 02:50:46 -26.6 Dark Up 55.7 307.0 Up 02:47:00 - 02:54:31 1439
Lone Pine 02:50:51 -25.8 Dark Up 55.3 308.8 Up 02:47:05 - 02:54:36 1376
Bishop 02:50:48 -25.6 Dark Up 56.0 308.0 Up 02:47:03 - 02:54:34 1349
Wildwood 02:50:58 -25.1 Dark Up 54.0 311.6 Up 02:47:13 - 02:54:44 1332
Hawthorne 02:50:45 -25.5 Dark Up 56.9 306.6 Up 02:46:59 - 02:54:30 1329
Lee Vining 02:50:47 -25.1 Dark Up 56.8 307.3 Up 02:47:01 - 02:54:32 1292
Yerington 02:50:44 -25.2 Dark Up 57.5 306.1 Up 02:46:58 - 02:54:29 1287
PNWRO 02:50:21 -25.7 Dark Down 61.0 295.9 Up 02:46:36 - 02:54:07 1270
Pasco 02:50:21 -25.6 Dark Down 61.2 295.5 Up 02:46:35 - 02:54:06 1252
Gardnerville 02:50:44 -24.7 Dark Up 57.8 306.2 Up 02:46:59 - 02:54:30 1242
George/Umatilla 02:50:22 -25.4 Dark Down 61.2 296.0 Up 02:46:36 - 02:54:07 1240
Carson City 02:50:43 -24.7 Dark Up 58.0 305.9 Up 02:46:58 - 02:54:29 1238
Reno 02:50:42 -24.7 Dark Up 58.2 305.4 Up 02:46:57 - 02:54:28 1235
Anarchist Mountain Observatory 02:50:12 -25.4 Dark Down 62.5 290.7 Up 02:46:27 - 02:53:58 1210
Tonasket 02:50:13 -25.4 Dark Down 62.4 291.2 Up 02:46:28 - 02:53:59 1209
Oroville 02:50:12 -25.4 Dark Down 62.5 290.8 Up 02:46:27 - 02:53:58 1206
Cedarville 02:50:36 -24.6 Dark Up 59.6 302.7 Up 02:46:51 - 02:54:22 1204
Okanogan 02:50:14 -25.3 Dark Down 62.4 291.8 Up 02:46:29 - 02:54:00 1202
Kelowna 02:50:09 -25.4 Dark Down 62.8 289.1 Up 02:46:24 - 02:53:55 1199
Oliver 02:50:11 -25.3 Dark Down 62.7 290.3 Up 02:46:26 - 02:53:57 1196
Okanagan Falls 02:50:11 -25.3 Dark Down 62.7 290.0 Up 02:46:26 - 02:53:57 1193
Penticton 02:50:10 -25.3 Dark Down 62.8 289.7 Up 02:46:25 - 02:53:56 1192
Brewster 02:50:15 -25.1 Dark Down 62.4 292.2 Up 02:46:29 - 02:54:00 1191
Lakeview 02:50:34 -24.5 Dark Up 60.0 301.7 Up 02:46:49 - 02:54:20 1188
Portola 02:50:42 -24.2 Dark Up 58.8 305.1 Up 02:46:56 - 02:54:27 1185
Summerland 02:50:09 -25.2 Dark Down 63.0 289.0 Up 02:46:24 - 02:53:55 1176
Paisley 02:50:32 -24.4 Dark Up 60.4 301.0 Up 02:46:47 - 02:54:18 1173
Susanville 02:50:40 -24.1 Dark Up 59.2 304.3 Up 02:46:54 - 02:54:25 1170
Manson/Chelan 02:50:16 -24.9 Dark Down 62.6 292.5 Up 02:46:30 - 02:54:01 1168
CPSLO 02:50:55 -23.6 Dark Up 56.1 310.7 Up 02:47:10 - 02:54:41 1167
Entiat 02:50:17 -24.8 Dark Down 62.5 292.8 Up 02:46:31 - 02:54:02 1166
Toppenish/White Swan 02:50:21 -24.7 Dark Down 62.1 295.1 Up 02:46:35 - 02:54:06 1164
Wenatchee 02:50:17 -24.8 Dark Down 62.5 293.3 Up 02:46:32 - 02:54:03 1161
Gimple 02:50:41 -24.0 Dark Up 59.2 304.7 Up 02:46:55 - 02:54:26 1154
Yakima 02:50:20 -24.6 Dark Down 62.3 294.7 Up 02:46:35 - 02:54:06 1151
Ellensburg 02:50:19 -24.6 Dark Down 62.4 294.0 Up 02:46:33 - 02:54:04 1149
Quincy 02:50:42 -23.9 Dark Up 59.1 305.0 Up 02:46:56 - 02:54:27 1148
Greenville 02:50:41 -23.9 Dark Up 59.3 304.7 Up 02:46:55 - 02:54:26 1148
North Lake 02:50:31 -24.2 Dark Up 60.9 300.1 Up 02:46:45 - 02:54:16 1144
Goldendale 02:50:23 -24.4 Dark Down 62.1 295.9 Up 02:46:37 - 02:54:08 1138
Maupin 02:50:25 -24.2 Dark Down 62.0 297.0 Up 02:46:39 - 02:54:10 1123
Madras/Culver 02:50:27 -24.1 Dark Up 61.8 297.9 Up 02:46:41 - 02:54:12 1123
Redmond 02:50:27 -24.0 Dark Up 61.6 298.5 Up 02:46:42 - 02:54:13 1121
The Dalles 02:50:24 -24.1 Dark Down 62.2 296.3 Up 02:46:38 - 02:54:09 1113
Fall River/Burney 02:50:38 -23.6 Dark Up 60.1 303.4 Up 02:46:53 - 02:54:24 1113
Bend 02:50:28 -23.9 Dark Up 61.6 298.8 Up 02:46:43 - 02:54:14 1111
Tulelake 02:50:35 -23.7 Dark Up 60.6 302.1 Up 02:46:50 - 02:54:21 1105
Oregon Observatory 02:50:29 -23.8 Dark Up 61.6 299.1 Up 02:46:43 - 02:54:14 1102
La Pine/Gilchrist 02:50:30 -23.8 Dark Up 61.5 299.4 Up 02:46:44 - 02:54:15 1099
Sisters 02:50:28 -23.8 Dark Up 61.9 298.4 Up 02:46:42 - 02:54:13 1092
Klamath Falls 02:50:34 -23.5 Dark Up 61.0 301.7 Up 02:46:49 - 02:54:20 1082
Chiloquin 02:50:33 -23.4 Dark Up 61.2 301.2 Up 02:46:48 - 02:54:19 1075

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 342842, (2020/11/18 02:50UT)
Object            RA         Dec     mag  sep  mel
Deneb          20:41:25.9 +45:16:49  1.3 10.25  76
PPM 037948     19:56:45.2 +50:54:10  6.3  1.05  78
PPM 037860     19:51:33.0 +50:39:17  8.4  0.37  78
PPM 037798     19:48:12.2 +50:49:23 10.1  0.32  78
342842         19:50:04.0 +50:56:20 11.2        78
Positions are for J2000

Event circumstances last updated at 2019/01/29 03:55:12 UT

Marc W. Buie, Southwest Research Institute

RECON