RECON: TNO occultation with 530955

Event between (530955) 11YN79 and star GA1220:03435222 with event index number of 1600042

Geocentric closest approach at 2021/02/08 11:18:23 UTC

J2000 position of star is 09:43:54.3 +32:40:04
Equinox of date position of star is 09:45:03.5 +32:34:40
Stellar brightness G=15.4, use SENSEUP=128
Star is 139 degrees from the moon. Moon is 13% illuminated.
TNO apparent brightness V=22.2

[RECON map]
TNO is 39.4 AU from the Sun and 38.5 AU from the Earth.
The TNO is moving 24.8 km/sec on the sky relative to the star, or, 3.2 arcsec/hr.
The 1-sigma error in the time of the event is 212 seconds.
The 1-sigma cross-track error in the shadow position is 3294 km.
The sky-plane scale is 27890.1 km/arcsec.

The TNO has an absolute magnitude Hv=6.2
Diameter=346.7 km assuming a 5% albedo -- 14.0 sec chord
Diameter=141.6 km assuming a 30% albedo -- 5.7 sec chord
Dynamical classification is SCATNEAR
 
 
 
 
 
 

Star training set for 530955, (2021/02/08 11:18UT)
Object            RA         Dec     mag  sep  mel
Regulus        10:09:29.7 +11:51:48  1.3 21.45 128
13 LMi         09:43:58.7 +34:59:45  6.1  2.44 139
PPM 074710     09:43:49.8 +32:53:52  7.9  0.43 139
PPM 074723     09:44:54.3 +32:22:56 11.0  0.20 139
530955         09:45:09.2 +32:34:13 15.4       138
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 4.3 sigma about the mid-time.
The median site spacing is 13.3 km RECON observability=1.0 and success probability=9.0%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
SwRI 11:16:27 -32.1 Dark Down 44.5 279.4 Up 11:01:27 - 11:31:27 -1628
Kelowna 11:17:21 -38.7 Dark Down 54.2 257.7 Up 11:02:21 - 11:32:21 -1718
Penticton 11:17:21 -39.0 Dark Down 54.4 258.0 Up 11:02:21 - 11:32:21 -1748
Summerland 11:17:21 -39.0 Dark Down 54.4 257.8 Up 11:02:21 - 11:32:21 -1749
Okanagan Falls 11:17:20 -39.1 Dark Down 54.4 258.2 Up 11:02:20 - 11:32:20 -1762
Oliver 11:17:19 -39.1 Dark Down 54.5 258.5 Up 11:02:19 - 11:32:19 -1771
Anarchist Mountain Observatory 11:17:18 -39.1 Dark Down 54.4 258.9 Up 11:02:18 - 11:32:18 -1773
Oroville 11:17:19 -39.2 Dark Down 54.4 258.9 Up 11:02:19 - 11:32:19 -1781
Tonasket 11:17:18 -39.3 Dark Down 54.5 259.2 Up 11:02:18 - 11:32:18 -1796
Okanogan 11:17:16 -39.5 Dark Down 54.6 259.6 Up 11:02:16 - 11:32:16 -1825
Brewster 11:17:16 -39.7 Dark Down 54.8 259.7 Up 11:02:16 - 11:32:16 -1852
Manson/Chelan 11:17:15 -40.0 Dark Down 55.1 259.7 Up 11:02:15 - 11:32:15 -1883
Wenatchee 11:17:14 -40.4 Dark Down 55.3 260.2 Up 11:02:14 - 11:32:14 -1923
Pasco 11:17:08 -40.1 Dark Down 54.7 262.9 Up 11:02:08 - 11:32:08 -1942
PNWRO 11:17:07 -40.0 Dark Down 54.5 263.4 Up 11:02:07 - 11:32:07 -1948
Ellensburg 11:17:13 -40.7 Dark Down 55.5 260.6 Up 11:02:13 - 11:32:13 -1961
George/Umatilla 11:17:07 -40.4 Dark Down 54.9 263.2 Up 11:02:07 - 11:32:07 -1975
Yakima 11:17:12 -40.9 Dark Down 55.6 261.2 Up 11:02:12 - 11:32:12 -1989
Toppenish/White Swan 11:17:11 -40.8 Dark Down 55.5 261.6 Up 11:02:11 - 11:32:11 -1996
Goldendale 11:17:09 -41.3 Dark Down 55.9 262.1 Up 11:02:09 - 11:32:09 -2054
The Dalles 11:17:10 -41.7 Dark Down 56.2 262.1 Up 11:02:10 - 11:32:10 -2087
Maupin 11:17:07 -41.8 Dark Down 56.2 262.8 Up 11:02:07 - 11:32:07 -2111
Madras/Culver 11:17:06 -42.0 Dark Down 56.3 263.5 Up 11:02:06 - 11:32:06 -2151
Redmond 11:17:05 -42.2 Dark Down 56.3 264.0 Up 11:02:05 - 11:32:05 -2179
Sisters 11:17:06 -42.5 Dark Down 56.6 263.7 Up 11:02:06 - 11:32:06 -2197
Bend 11:17:04 -42.4 Dark Down 56.5 264.2 Up 11:02:04 - 11:32:04 -2201
Oregon Observatory 11:17:04 -42.6 Dark Down 56.6 264.4 Up 11:02:04 - 11:32:04 -2220
La Pine/Gilchrist 11:17:03 -42.7 Dark Down 56.6 264.6 Up 11:02:03 - 11:32:03 -2237
North Lake 11:17:01 -42.5 Dark Down 56.2 265.8 Up 11:02:01 - 11:32:01 -2238
Paisley 11:16:58 -42.4 Dark Down 56.0 266.8 Up 11:01:58 - 11:31:58 -2259
Lakeview 11:16:57 -42.5 Dark Down 55.9 267.7 Up 11:01:57 - 11:31:57 -2285
Cedarville 11:16:54 -42.6 Dark Down 55.8 268.8 Up 11:01:54 - 11:31:54 -2323
Chiloquin 11:17:00 -43.4 Dark Down 57.0 266.1 Up 11:02:00 - 11:32:00 -2335
Klamath Falls 11:16:59 -43.4 Dark Down 57.0 266.6 Up 11:01:59 - 11:31:59 -2356
Tulelake 11:16:57 -43.3 Dark Down 56.8 267.3 Up 11:01:57 - 11:31:57 -2360
Tonopah 11:16:37 -41.5 Dark Down 53.5 275.4 Up 11:01:37 - 11:31:37 -2414
Patrick 11:16:21 -39.6 Dark Down 50.5 280.3 Up 11:01:21 - 11:31:21 -2416
Fall River/Burney 11:16:55 -43.6 Dark Down 56.7 268.7 Up 11:01:55 - 11:31:55 -2422
Susanville 11:16:51 -43.3 Dark Down 56.2 270.1 Up 11:01:51 - 11:31:51 -2429
Henderson 11:16:26 -40.3 Dark Down 51.5 279.1 Up 11:01:26 - 11:31:26 -2435
Indian Springs 11:16:29 -40.7 Dark Down 52.1 278.1 Up 11:01:29 - 11:31:29 -2436
Kingman/Dolan Springs 11:16:22 -39.7 Dark Down 50.6 280.5 Up 11:01:22 - 11:31:22 -2443
Reno 11:16:46 -43.0 Dark Down 55.6 271.9 Up 11:01:46 - 11:31:46 -2448
Yerington 11:16:43 -42.7 Dark Down 55.0 273.1 Up 11:01:43 - 11:31:43 -2453
Hawthorne 11:16:41 -42.5 Dark Down 54.6 274.1 Up 11:01:41 - 11:31:41 -2458
Gimple 11:16:50 -43.6 Dark Down 56.4 270.4 Up 11:01:50 - 11:31:50 -2461
Portola 11:16:49 -43.4 Dark Down 56.1 271.2 Up 11:01:49 - 11:31:49 -2463
Greenville 11:16:51 -43.6 Dark Down 56.4 270.4 Up 11:01:51 - 11:31:51 -2465
Beatty 11:16:32 -41.5 Dark Down 53.0 277.2 Up 11:01:32 - 11:31:32 -2473
Carson City 11:16:45 -43.1 Dark Down 55.5 272.5 Up 11:01:45 - 11:31:45 -2473
Searchlight/Boulder City 11:16:24 -40.4 Dark Down 51.3 279.8 Up 11:01:24 - 11:31:24 -2473
Laughlin/Bullhead City 11:16:23 -40.2 Dark Down 51.0 280.3 Up 11:01:23 - 11:31:23 -2475
Quincy 11:16:50 -43.7 Dark Down 56.4 270.7 Up 11:01:50 - 11:31:50 -2480
Gardnerville 11:16:45 -43.2 Dark Down 55.5 272.8 Up 11:01:45 - 11:31:45 -2489
Mohave Valley 11:16:22 -40.2 Dark Down 51.0 280.6 Up 11:01:22 - 11:31:22 -2494
Lake Havasu City 11:16:20 -40.1 Dark Down 50.7 281.2 Up 11:01:20 - 11:31:20 -2509
Lee Vining 11:16:40 -43.0 Dark Down 54.9 274.6 Up 11:01:40 - 11:31:40 -2527
Bishop 11:16:37 -42.6 Dark Down 54.3 275.8 Up 11:01:37 - 11:31:37 -2530
Parker 11:16:19 -40.1 Dark Down 50.6 281.6 Up 11:01:19 - 11:31:19 -2534
Lone Pine 11:16:34 -42.6 Dark Down 54.0 277.0 Up 11:01:34 - 11:31:34 -2568
Blythe 11:16:18 -40.5 Dark Down 50.7 282.2 Up 11:01:18 - 11:31:18 -2590
Yuma 11:16:15 -40.6 Dark Down 50.6 283.3 Up 11:01:15 - 11:31:15 -2661
Calipatria 11:16:18 -41.3 Dark Down 51.4 282.5 Up 11:01:18 - 11:31:18 -2682
Idyllwild 11:16:22 -42.2 Dark Down 52.5 281.3 Up 11:01:22 - 11:31:22 -2705
Wildwood 11:16:27 -43.6 Dark Down 54.1 280.2 Up 11:01:27 - 11:31:27 -2788
CPSLO 11:16:34 -44.9 Dark Down 55.9 277.7 Up 11:01:34 - 11:31:34 -2814

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 530955, (2021/02/08 11:18UT)
Object            RA         Dec     mag  sep  mel
Regulus        10:08:22.0 +11:58:02  1.3 21.45 128
13 LMi         09:42:42.7 +35:05:35  6.1  2.44 139
PPM 074710     09:42:34.6 +32:59:42  7.9  0.43 139
PPM 074723     09:43:39.4 +32:28:47 11.0  0.20 139
530955         09:43:54.3 +32:40:04 15.4       139
Positions are for J2000

Event circumstances last updated at 2019/07/02 21:59:15 UT

Marc W. Buie, Southwest Research Institute

RECON