RECON: TNO occultation with 470316

Event between (470316) 07OC10 and star GA1000:19280416 with event index number of 1140009

Geocentric closest approach at 2021/10/04 03:47:04 UTC

J2000 position of star is 21:58:18.3 +10:51:14
Equinox of date position of star is 21:59:16.4 +10:56:56
Stellar brightness G=13.7, use SENSEUP=64
Star is 153 degrees from the moon. Moon is 7% illuminated.
TNO apparent brightness V=20.7

[RECON map]
TNO is 36.3 AU from the Sun and 35.6 AU from the Earth.
The TNO is moving 19.5 km/sec on the sky relative to the star, or, 2.7 arcsec/hr.
The 1-sigma error in the time of the event is 158 seconds.
The 1-sigma cross-track error in the shadow position is 2463 km.
The sky-plane scale is 25808.2 km/arcsec.

The TNO has an absolute magnitude Hv=5.0
Diameter=602.6 km assuming a 5% albedo -- 30.9 sec chord
Diameter=246.0 km assuming a 30% albedo -- 12.6 sec chord
Dynamical classification is SCATNEAR
 
 
 
 
 
 

Star training set for 470316, (2021/10/04 03:47UT)
Object            RA         Dec     mag  sep  mel
Deneb          20:42:10.5 +45:21:32  1.3 38.16 115
Markab         23:05:50.8 +15:19:22  2.5 16.75 153
PPM 140969     22:03:05.5 +11:04:46  6.4  0.92 153
PPM 140916     22:00:35.9 +10:40:53  8.3  0.41 153
PPM 140899     21:59:54.9 +11:06:17  9.2  0.20 153
PPM 140888     21:59:28.1 +10:48:09 10.1  0.16 153
470316         21:59:22.3 +10:57:31 13.7       153
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 17.2 km RECON observability=1.0 and success probability=14.6%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Victoria 03:46:00 -20.2 Dark Down 47.6 144.6 Up 03:32:19 - 03:59:41 -1218
Clarence Fulton 03:45:43 -22.2 Dark Down 47.5 151.1 Up 03:32:02 - 03:59:24 -1329
Kelowna 03:45:44 -22.2 Dark Down 47.8 150.7 Up 03:32:03 - 03:59:25 -1339
Summerland 03:45:46 -22.2 Dark Down 47.9 150.3 Up 03:32:05 - 03:59:27 -1343
Penticton 03:45:46 -22.3 Dark Down 48.0 150.4 Up 03:32:05 - 03:59:27 -1351
Oliver 03:45:48 -22.4 Dark Down 48.3 150.2 Up 03:32:07 - 03:59:29 -1369
Anarchist Mountain Observatory 03:45:47 -22.6 Dark Down 48.6 150.4 Up 03:32:06 - 03:59:28 -1386
Tonasket 03:45:49 -22.7 Dark Down 48.8 150.2 Up 03:32:08 - 03:59:30 -1398
Manson/Chelan 03:45:54 -22.5 Dark Down 49.3 148.7 Up 03:32:13 - 03:59:35 -1404
Okanogan 03:45:52 -22.7 Dark Down 49.1 149.8 Up 03:32:11 - 03:59:33 -1408
Brewster 03:45:52 -22.7 Dark Down 49.2 149.3 Up 03:32:11 - 03:59:33 -1412
Entiat 03:45:55 -22.5 Dark Down 49.4 148.5 Up 03:32:14 - 03:59:36 -1412
Wenatchee 03:45:56 -22.5 Dark Down 49.6 148.2 Up 03:32:15 - 03:59:37 -1420
Ellensburg 03:45:59 -22.5 Dark Down 49.9 147.6 Up 03:32:18 - 03:59:40 -1430
Yakima 03:46:00 -22.7 Dark Down 50.2 147.3 Up 03:32:19 - 03:59:41 -1450
Toppenish/White Swan 03:46:01 -22.9 Dark Down 50.5 147.4 Up 03:32:20 - 03:59:42 -1469
The Dalles 03:46:06 -22.6 Dark Down 50.8 145.8 Up 03:32:25 - 03:59:47 -1470
Goldendale 03:46:04 -22.8 Dark Down 50.8 146.5 Up 03:32:23 - 03:59:45 -1476
Maupin 03:46:07 -22.8 Dark Down 51.2 145.7 Up 03:32:26 - 03:59:48 -1497
Sisters 03:46:12 -22.7 Dark Down 51.8 144.4 Up 03:32:31 - 03:59:53 -1518
Pasco 03:45:58 -23.7 Dark Down 51.0 149.2 Up 03:32:17 - 03:59:39 -1539
Redmond 03:46:12 -23.0 Dark Down 51.9 144.9 Up 03:32:31 - 03:59:53 -1539
Bend 03:46:12 -23.0 Dark Down 52.1 144.6 Up 03:32:31 - 03:59:53 -1544
Oregon Observatory 03:46:14 -22.9 Dark Down 52.1 144.3 Up 03:32:33 - 03:59:55 -1546
La Pine/Gilchrist 03:46:15 -23.0 Dark Down 52.3 144.0 Up 03:32:34 - 03:59:56 -1554
PNWRO 03:45:58 -24.0 Dark Down 51.3 149.4 Up 03:32:17 - 03:59:39 -1563
North Lake 03:46:14 -23.5 Dark Down 52.9 144.6 Up 03:32:33 - 03:59:55 -1609
Klamath Falls 03:46:22 -23.2 Dark Down 53.3 142.5 Up 03:32:41 - 04:00:03 -1619
Paisley 03:46:16 -23.9 Dark Down 53.5 144.7 Up 03:32:35 - 03:59:57 -1658
Lakeview 03:46:18 -24.2 Dark Down 54.0 144.6 Up 03:32:37 - 03:59:59 -1697
Fall River/Burney 03:46:25 -23.8 Dark Down 54.5 142.1 Up 03:32:44 - 04:00:06 -1705
Cedarville 03:46:19 -24.5 Dark Down 54.6 144.3 Up 03:32:38 - 04:00:00 -1743
Greenville 03:46:27 -24.4 Dark Down 55.4 142.0 Up 03:32:46 - 04:00:08 -1782
Susanville 03:46:25 -24.5 Dark Down 55.3 142.7 Up 03:32:44 - 04:00:06 -1782
Gimple 03:46:27 -24.5 Dark Down 55.4 142.1 Up 03:32:46 - 04:00:08 -1786
Quincy 03:46:28 -24.5 Dark Down 55.6 141.8 Up 03:32:47 - 04:00:09 -1794
Portola 03:46:28 -24.8 Dark Down 55.9 142.5 Up 03:32:47 - 04:00:09 -1827
Reno 03:46:27 -25.4 Dark Down 56.4 143.2 Up 03:32:46 - 04:00:08 -1879
Carson City 03:46:28 -25.5 Dark Down 56.7 142.9 Up 03:32:47 - 04:00:09 -1902
Gardnerville 03:46:29 -25.6 Dark Down 56.9 142.8 Up 03:32:48 - 04:00:10 -1919
Yerington 03:46:27 -26.0 Dark Down 57.1 143.8 Up 03:32:46 - 04:00:08 -1949
Hawthorne 03:46:26 -26.6 Dark Down 57.8 144.2 Up 03:32:45 - 04:00:07 -2007
Lee Vining 03:46:31 -26.4 Dark Down 58.0 142.9 Up 03:32:50 - 04:00:12 -2014
CPSLO 03:46:46 -25.9 Dark Down 59.3 137.7 Up 03:33:05 - 04:00:27 -2093
Bishop 03:46:31 -27.1 Dark Down 58.8 143.5 Up 03:32:50 - 04:00:12 -2093
Tonopah 03:46:24 -27.8 Dark Down 58.8 146.1 Up 03:32:43 - 04:00:05 -2116
Beatty 03:46:27 -28.5 Dark Down 59.9 145.8 Up 03:32:46 - 04:00:08 -2217
Wildwood 03:46:44 -27.8 Dark Down 61.3 139.7 Up 03:33:03 - 04:00:25 -2293
Indian Springs 03:46:25 -29.4 Dark Down 60.7 147.4 Up 03:32:44 - 04:00:06 -2301
Henderson 03:46:25 -30.1 Dark Down 61.4 148.1 Up 03:32:44 - 04:00:06 -2377
Searchlight/Boulder City 03:46:27 -30.3 Dark Down 62.0 147.7 Up 03:32:46 - 04:00:08 -2419
Idyllwild 03:46:40 -29.4 Dark Down 62.6 142.6 Up 03:32:59 - 04:00:21 -2429
Laughlin/Bullhead City 03:46:27 -30.7 Dark Down 62.4 148.1 Up 03:32:46 - 04:00:08 -2460
Mohave Valley 03:46:28 -30.8 Dark Down 62.6 147.8 Up 03:32:47 - 04:00:09 -2479
Patrick 03:46:24 -31.1 Dark Down 62.4 149.6 Up 03:32:43 - 04:00:05 -2484
Kingman/Dolan Springs 03:46:25 -31.1 Dark Down 62.6 149.1 Up 03:32:44 - 04:00:06 -2488
Lake Havasu City 03:46:29 -31.1 Dark Down 63.0 147.9 Up 03:32:48 - 04:00:10 -2521
Calipatria 03:46:38 -30.6 Dark Down 63.6 144.1 Up 03:32:57 - 04:00:19 -2543
Parker 03:46:30 -31.2 Dark Down 63.4 147.6 Up 03:32:49 - 04:00:11 -2547
DCO 03:46:22 -31.8 Dark Down 63.0 150.7 Up 03:32:41 - 04:00:03 -2547
Blythe 03:46:33 -31.1 Dark Down 63.7 146.4 Up 03:32:52 - 04:00:14 -2565
Yuma 03:46:37 -31.4 Dark Down 64.4 145.3 Up 03:32:56 - 04:00:18 -2627
Niwot 03:45:38 -35.4 Dark Down 60.4 169.5 Up 03:31:57 - 03:59:19 -2653
SwRI 03:45:39 -35.4 Dark Down 60.5 169.3 Up 03:31:58 - 03:59:20 -2655
George/Scottsdale 03:46:24 -33.3 Dark Down 64.7 152.0 Up 03:32:43 - 04:00:05 -2722

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 470316, (2021/10/04 03:47UT)
Object            RA         Dec     mag  sep  mel
Deneb          20:41:25.9 +45:16:49  1.3 38.16 115
Markab         23:04:45.8 +15:12:18  2.5 16.75 153
PPM 140969     22:02:01.4 +10:58:26  6.4  0.92 153
PPM 140916     21:59:31.8 +10:34:35  8.3  0.41 153
PPM 140899     21:58:50.9 +11:00:00  9.2  0.20 153
PPM 140888     21:58:23.9 +10:41:53 10.1  0.16 153
470316         21:58:18.3 +10:51:14 13.7       153
Positions are for J2000

Event circumstances last updated at 2019/09/30 23:00:46 UT

Marc W. Buie, Southwest Research Institute

RECON