RECON: TNO occultation with 281371

Event between (281371) 08FC76 and star GA0900:02281819 with event index number of 1128272

Geocentric closest approach at 2022/01/21 08:52:14 UTC

J2000 position of star is 07:03:25.9 +01:56:00
Equinox of date position of star is 07:04:26.5 +01:54:13
Stellar brightness G=15.4, use SENSEUP=128
Star is 58 degrees from the moon. Moon is 89% illuminated.
TNO apparent brightness V=20.4

[RECON map]
TNO is 12.9 AU from the Sun and 12.0 AU from the Earth.
The TNO is moving 21.4 km/sec on the sky relative to the star, or, 8.9 arcsec/hr.
The 1-sigma error in the time of the event is 123 seconds.
The 1-sigma cross-track error in the shadow position is 1407 km.
The sky-plane scale is 8689.4 km/arcsec.

The TNO has an absolute magnitude Hv=9.3
Diameter=83.2 km assuming a 5% albedo -- 3.9 sec chord
Diameter=34.0 km assuming a 30% albedo -- 1.6 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 

Star training set for 281371, (2022/01/21 08:52UT)
Object            RA         Dec     mag  sep  mel
Betelgeuse     05:56:22.0 +07:24:34  0.4 17.86  73
Alhena         06:38:59.1 +16:22:43  1.9 15.79  62
PPM 151661     07:00:06.6 +03:34:15  6.0  2.01  59
PPM 151846     07:05:10.8 +01:51:49  8.4  0.15  58
281371         07:04:34.7 +01:53:58 15.4        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 5.0 sigma about the mid-time.
The median site spacing is 18.3 km RECON observability=1.0 and success probability=17.2%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Kelowna 08:51:08 -58.8 Dark Up 36.4 216.0 Up 08:40:25 - 09:01:50 2569
Summerland 08:51:08 -59.2 Dark Up 36.7 215.8 Up 08:40:26 - 09:01:51 2546
Penticton 08:51:08 -59.2 Dark Up 36.7 215.9 Up 08:40:25 - 09:01:50 2542
Okanagan Falls 08:51:07 -59.4 Dark Up 36.9 216.0 Up 08:40:25 - 09:01:50 2529
Oliver 08:51:07 -59.5 Dark Up 37.0 216.1 Up 08:40:24 - 09:01:49 2518
Anarchist Mountain Observatory 08:51:06 -59.6 Dark Up 37.1 216.4 Up 08:40:23 - 09:01:48 2507
Oroville 08:51:06 -59.7 Dark Up 37.2 216.3 Up 08:40:23 - 09:01:48 2501
Tonasket 08:51:05 -60.0 Dark Up 37.4 216.4 Up 08:40:23 - 09:01:48 2484
Okanogan 08:51:05 -60.3 Dark Up 37.7 216.4 Up 08:40:23 - 09:01:48 2459
Brewster 08:51:05 -60.6 Dark Up 38.0 216.3 Up 08:40:23 - 09:01:48 2438
Manson/Chelan 08:51:06 -60.9 Dark Up 38.3 216.0 Up 08:40:23 - 09:01:48 2420
Entiat 08:51:05 -61.1 Dark Up 38.5 216.0 Up 08:40:23 - 09:01:48 2403
Wenatchee 08:51:05 -61.4 Dark Up 38.7 216.0 Up 08:40:23 - 09:01:48 2384
Ellensburg 08:51:05 -61.8 Dark Up 39.2 215.9 Up 08:40:23 - 09:01:48 2352
Yakima 08:51:05 -62.2 Dark Up 39.5 216.1 Up 08:40:22 - 09:01:47 2321
Pasco 08:50:59 -62.2 Dark Up 39.2 217.9 Up 08:40:17 - 09:01:42 2308
Toppenish/White Swan 08:51:04 -62.4 Dark Up 39.6 216.4 Up 08:40:21 - 09:01:46 2307
PNWRO 08:50:58 -62.3 Dark Up 39.3 218.3 Up 08:40:16 - 09:01:41 2291
George/Umatilla 08:50:59 -62.5 Dark Up 39.5 217.8 Up 08:40:17 - 09:01:42 2281
Goldendale 08:51:04 -63.0 Dark Up 40.2 216.2 Up 08:40:21 - 09:01:46 2261
The Dalles 08:51:05 -63.3 Dark Up 40.6 215.8 Up 08:40:22 - 09:01:47 2241
Maupin 08:51:03 -63.7 Dark Up 40.9 216.2 Up 08:40:21 - 09:01:46 2210
Madras/Culver 08:51:02 -64.2 Dark Up 41.3 216.4 Up 08:40:20 - 09:01:45 2168
Redmond 08:51:02 -64.5 Dark Up 41.6 216.5 Up 08:40:19 - 09:01:44 2139
Sisters 08:51:03 -64.6 Dark Up 41.8 216.0 Up 08:40:21 - 09:01:46 2138
Bend 08:51:02 -64.8 Dark Up 41.9 216.5 Up 08:40:19 - 09:01:44 2122
Oregon Observatory 08:51:02 -65.0 Dark Up 42.1 216.4 Up 08:40:19 - 09:01:44 2107
La Pine/Gilchrist 08:51:02 -65.2 Dark Up 42.3 216.4 Up 08:40:19 - 09:01:44 2090
North Lake 08:50:59 -65.4 Dark Up 42.3 217.4 Up 08:40:17 - 09:01:42 2061
Paisley 08:50:56 -65.8 Dark Up 42.6 218.1 Up 08:40:14 - 09:01:39 2020
Chiloquin 08:51:01 -66.3 Dark Up 43.3 216.6 Up 08:40:18 - 09:01:43 1999
Lakeview 08:50:55 -66.3 Dark Up 42.9 218.6 Up 08:40:12 - 09:01:37 1981
Klamath Falls 08:51:00 -66.6 Dark Up 43.5 216.9 Up 08:40:17 - 09:01:42 1972
Tulelake 08:50:58 -66.8 Dark Up 43.6 217.4 Up 08:40:16 - 09:01:41 1953
Niwot 08:50:02 -60.8 Dark Up 36.0 236.1 Up 08:39:20 - 09:00:45 1944
SwRI 08:50:02 -61.0 Dark Up 36.1 236.1 Up 08:39:20 - 09:00:45 1935
Cedarville 08:50:53 -66.8 Dark Up 43.4 219.2 Up 08:40:11 - 09:01:36 1930
Fall River/Burney 08:50:56 -67.6 Dark Up 44.3 218.0 Up 08:40:14 - 09:01:39 1879
Susanville 08:50:52 -68.0 Dark Up 44.5 219.3 Up 08:40:10 - 09:01:35 1834
Gimple 08:50:53 -68.3 Dark Up 44.8 219.2 Up 08:40:10 - 09:01:35 1809
Greenville 08:50:53 -68.3 Dark Up 44.8 219.1 Up 08:40:11 - 09:01:36 1808
Quincy 08:50:53 -68.5 Dark Up 45.0 219.3 Up 08:40:10 - 09:01:35 1791
Portola 08:50:51 -68.5 Dark Up 44.8 219.9 Up 08:40:08 - 09:01:33 1785
Reno 08:50:48 -68.5 Dark Up 44.7 220.9 Up 08:40:06 - 09:01:31 1769
Carson City 08:50:47 -68.8 Dark Up 45.0 221.1 Up 08:40:05 - 09:01:30 1739
Yerington 08:50:45 -68.8 Dark Up 44.8 222.0 Up 08:40:02 - 09:01:27 1728
Gardnerville 08:50:47 -69.0 Dark Up 45.1 221.4 Up 08:40:04 - 09:01:29 1719
Hawthorne 08:50:42 -69.0 Dark Up 44.9 223.0 Up 08:39:59 - 09:01:24 1694
Tonopah 08:50:36 -68.8 Dark Up 44.5 224.9 Up 08:39:54 - 09:01:19 1667
Lee Vining 08:50:43 -69.6 Dark Up 45.6 222.8 Up 08:40:00 - 09:01:25 1641
Bishop 08:50:39 -69.9 Dark Up 45.6 224.0 Up 08:39:56 - 09:01:21 1596
Beatty 08:50:32 -69.5 Dark Up 45.0 226.2 Up 08:39:50 - 09:01:15 1572
Indian Springs 08:50:28 -69.2 Dark Up 44.6 227.7 Up 08:39:45 - 09:01:10 1553
Lone Pine 08:50:36 -70.3 Dark Up 46.0 225.0 Up 08:39:54 - 09:01:19 1533
Henderson 08:50:24 -69.3 Dark Up 44.6 228.9 Up 08:39:42 - 09:01:07 1513
Patrick 08:50:19 -69.1 Dark Up 44.3 230.5 Up 08:39:37 - 09:01:02 1469
Searchlight/Boulder City 08:50:23 -69.6 Dark Up 44.9 229.3 Up 08:39:40 - 09:01:05 1463
DCO 08:50:16 -68.9 Dark Up 44.0 231.5 Up 08:39:34 - 09:00:59 1448
Kingman/Dolan Springs 08:50:19 -69.3 Dark Up 44.5 230.5 Up 08:39:37 - 09:01:02 1447
Laughlin/Bullhead City 08:50:21 -69.7 Dark Up 44.9 229.9 Up 08:39:39 - 09:01:04 1441
Mohave Valley 08:50:20 -69.8 Dark Up 45.1 230.2 Up 08:39:38 - 09:01:03 1416
CPSLO 08:50:43 -72.6 Dark Up 48.3 222.8 Up 08:40:01 - 09:01:26 1394
Lake Havasu City 08:50:19 -70.0 Dark Up 45.2 230.7 Up 08:39:36 - 09:01:01 1383
Parker 08:50:18 -70.2 Dark Up 45.4 231.0 Up 08:39:36 - 09:01:01 1352
Wildwood 08:50:33 -72.6 Dark Up 48.0 226.2 Up 08:39:51 - 09:01:16 1306
Blythe 08:50:18 -70.7 Dark Up 45.9 231.1 Up 08:39:36 - 09:01:01 1302
Idyllwild 08:50:26 -71.9 Dark Up 47.1 228.7 Up 08:39:44 - 09:01:09 1292
Calipatria 08:50:21 -71.6 Dark Up 46.8 230.5 Up 08:39:38 - 09:01:03 1248
Yuma 08:50:17 -71.4 Dark Up 46.5 231.8 Up 08:39:34 - 09:00:59 1218

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 281371, (2022/01/21 08:52UT)
Object            RA         Dec     mag  sep  mel
Betelgeuse     05:55:10.3 +07:24:26  0.4 17.86  73
Alhena         06:37:42.8 +16:23:57  1.9 15.79  62
PPM 151661     06:58:57.0 +03:36:08  6.0  2.01  59
PPM 151846     07:04:02.0 +01:53:52  8.4  0.15  58
281371         07:03:25.9 +01:56:00 15.4        58
Positions are for J2000

Event circumstances last updated at 2019/06/08 02:59:13 UT

Marc W. Buie, Southwest Research Institute

RECON