RECON: TNO occultation with 544977

Event between (544977) 14WZ535 and star GA0860:03660459 with event index number of 1708637

Geocentric closest approach at 2022/01/19 09:00:34 UTC

J2000 position of star is 09:00:52.5 -03:53:06
Equinox of date position of star is 09:01:53.2 -03:57:53
Stellar brightness G=14.5, use SENSEUP=128
Star is 25 degrees from the moon. Moon is 98% illuminated.
TNO apparent brightness V=26.3

[RECON map]
TNO is 42.5 AU from the Sun and 41.6 AU from the Earth.
The TNO is moving 24.2 km/sec on the sky relative to the star, or, 2.9 arcsec/hr.
The 1-sigma error in the time of the event is 222 seconds.
The 1-sigma cross-track error in the shadow position is 2635 km.
The sky-plane scale is 30191.3 km/arcsec.

The TNO has an absolute magnitude Hv=10.0
Diameter=331.1 km assuming a 5% albedo -- 2.5 sec chord
Diameter=135.2 km assuming a 30% albedo -- 1.0 sec chord
Dynamical classification is SCATEXTD
 
 
 
 
 
 

Star training set for 544977, (2022/01/19 09:01UT)
Object            RA         Dec     mag  sep  mel
Regulus        10:09:32.7 +11:51:31  1.3 23.08  16
Alphard        09:28:40.3 -08:45:19  2.0  8.17  30
PPM 191823     08:55:23.2 -05:31:09  6.4  2.26  27
PPM 191939     09:02:29.6 -03:27:21  8.0  0.53  25
PPM 191936     09:02:09.8 -03:45:04  9.7  0.23  25
544977         09:01:58.9 -03:58:20 14.5        25
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 4.0 sigma about the mid-time.
The median site spacing is 17.4 km RECON observability=1.0 and success probability=11.8%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Clarence Fulton 09:01:11 -58.3 Dark Up 35.9 179.4 Up 08:46:11 - 09:16:11 -1345
Kelowna 09:01:11 -58.6 Dark Up 36.3 179.2 Up 08:46:11 - 09:16:11 -1372
Peachland 09:01:12 -58.8 Dark Up 36.4 178.8 Up 08:46:12 - 09:16:12 -1383
Summerland 09:01:11 -58.9 Dark Up 36.5 178.9 Up 08:46:11 - 09:16:11 -1391
Penticton 09:01:11 -59.0 Dark Up 36.6 179.1 Up 08:46:11 - 09:16:11 -1394
Oliver 09:01:11 -59.3 Dark Up 36.9 179.1 Up 08:46:11 - 09:16:11 -1418
Anarchist Mountain Observatory 09:01:10 -59.4 Dark Up 37.1 179.3 Up 08:46:10 - 09:16:10 -1426
Tonasket 09:01:10 -59.7 Dark Up 37.4 179.2 Up 08:46:10 - 09:16:10 -1448
Okanogan 09:01:11 -60.0 Dark Up 37.7 179.0 Up 08:46:11 - 09:16:11 -1472
Brewster 09:01:11 -60.3 Dark Up 38.0 178.8 Up 08:46:11 - 09:16:11 -1493
Victoria 09:01:22 -60.8 Dark Up 37.4 174.3 Up 08:46:22 - 09:16:22 -1509
Manson/Chelan 09:01:13 -60.6 Dark Up 38.2 178.3 Up 08:46:13 - 09:16:13 -1512
Entiat 09:01:12 -60.9 Dark Up 38.4 178.2 Up 08:46:12 - 09:16:12 -1528
Wenatchee 09:01:12 -61.1 Dark Up 38.7 178.1 Up 08:46:12 - 09:16:12 -1547
Ellensburg 09:01:13 -61.6 Dark Up 39.1 177.8 Up 08:46:13 - 09:16:13 -1578
Yakima 09:01:13 -61.9 Dark Up 39.5 177.8 Up 08:46:13 - 09:16:13 -1606
Pasco 09:01:08 -61.8 Dark Up 39.9 179.6 Up 08:46:08 - 09:16:08 -1612
Toppenish/White Swan 09:01:12 -62.1 Dark Up 39.7 178.0 Up 08:46:12 - 09:16:12 -1620
PNWRO 09:01:07 -61.9 Dark Up 40.1 179.9 Up 08:46:07 - 09:16:07 -1626
Goldendale 09:01:14 -62.7 Dark Up 40.3 177.4 Up 08:46:14 - 09:16:14 -1664
The Dalles 09:01:14 -63.0 Dark Up 40.5 176.9 Up 08:46:14 - 09:16:14 -1685
Maupin 09:01:14 -63.4 Dark Up 40.9 177.0 Up 08:46:14 - 09:16:14 -1714
Redmond 09:01:14 -64.2 Dark Up 41.8 176.9 Up 08:46:14 - 09:16:14 -1781
Sisters 09:01:15 -64.3 Dark Up 41.8 176.3 Up 08:46:15 - 09:16:15 -1784
Bend 09:01:15 -64.4 Dark Up 42.0 176.7 Up 08:46:15 - 09:16:15 -1798
Oregon Observatory 09:01:15 -64.6 Dark Up 42.2 176.5 Up 08:46:15 - 09:16:15 -1813
La Pine/Gilchrist 09:01:15 -64.8 Dark Up 42.4 176.4 Up 08:46:15 - 09:16:15 -1829
North Lake 09:01:13 -65.0 Dark Up 42.8 177.2 Up 08:46:13 - 09:16:13 -1853
Niwot 09:00:18 -59.5 Dark Up 44.3 198.9 Up 08:45:18 - 09:15:18 -1885
Paisley 09:01:11 -65.4 Dark Up 43.4 177.6 Up 08:46:11 - 09:16:11 -1890
SwRI 09:00:18 -59.6 Dark Up 44.4 198.8 Up 08:45:18 - 09:15:18 -1895
Lakeview 09:01:11 -65.8 Dark Up 43.9 177.9 Up 08:46:11 - 09:16:11 -1925
Klamath Falls 09:01:15 -66.2 Dark Up 43.8 175.9 Up 08:46:15 - 09:16:15 -1942
Cedarville 09:01:10 -66.3 Dark Up 44.6 178.1 Up 08:46:10 - 09:16:10 -1973
Fall River/Burney 09:01:14 -67.2 Dark Up 45.0 176.4 Up 08:46:14 - 09:16:14 -2028
Susanville 09:01:11 -67.4 Dark Up 45.7 177.4 Up 08:46:11 - 09:16:11 -2067
Gimple 09:01:11 -67.8 Dark Up 45.9 177.1 Up 08:46:11 - 09:16:11 -2092
Greenville 09:01:12 -67.8 Dark Up 45.9 176.9 Up 08:46:12 - 09:16:12 -2093
Quincy 09:01:11 -68.0 Dark Up 46.1 176.9 Up 08:46:11 - 09:16:11 -2109
Portola 09:01:10 -67.9 Dark Up 46.3 177.6 Up 08:46:10 - 09:16:10 -2112
Reno 09:01:08 -67.8 Dark Up 46.6 178.5 Up 08:46:08 - 09:16:08 -2124
Carson City 09:01:07 -68.1 Dark Up 46.9 178.5 Up 08:46:07 - 09:16:07 -2152
Yerington 09:01:05 -68.0 Dark Up 47.1 179.5 Up 08:46:05 - 09:16:05 -2159
Gardnerville 09:01:07 -68.3 Dark Up 47.2 178.6 Up 08:46:07 - 09:16:07 -2171
Hawthorne 09:01:03 -68.1 Dark Up 47.6 180.2 Up 08:46:03 - 09:16:03 -2189
Tonopah 09:00:58 -67.8 Dark Up 48.0 182.3 Up 08:45:58 - 09:15:58 -2206
Lee Vining 09:01:05 -68.8 Dark Up 48.2 179.5 Up 08:46:05 - 09:16:05 -2241
Bishop 09:01:02 -68.9 Dark Up 48.7 180.6 Up 08:46:02 - 09:16:02 -2280
Beatty 09:00:55 -68.4 Dark Up 49.2 183.0 Up 08:45:55 - 09:15:55 -2295
Indian Springs 09:00:51 -68.1 Dark Up 49.4 184.7 Up 08:45:51 - 09:15:51 -2307
Henderson 09:00:48 -68.0 Dark Up 49.9 185.8 Up 08:45:48 - 09:15:48 -2341
Patrick 09:00:44 -67.7 Dark Up 50.4 187.6 Up 08:45:44 - 09:15:44 -2377
Searchlight/Boulder City 09:00:48 -68.3 Dark Up 50.5 186.0 Up 08:45:48 - 09:15:48 -2388
DCO 09:00:41 -67.4 Dark Up 50.7 188.7 Up 08:45:41 - 09:15:41 -2393
Kingman/Dolan Springs 09:00:44 -68.0 Dark Up 50.7 187.3 Up 08:45:44 - 09:15:44 -2399
Laughlin/Bullhead City 09:00:47 -68.3 Dark Up 50.8 186.5 Up 08:45:47 - 09:15:47 -2409
Mohave Valley 09:00:46 -68.5 Dark Up 51.0 186.6 Up 08:45:46 - 09:15:46 -2432
Lake Havasu City 09:00:45 -68.6 Dark Up 51.4 187.0 Up 08:45:45 - 09:15:45 -2462
CPSLO 09:01:09 -71.7 Dark Up 50.8 177.1 Up 08:46:09 - 09:16:09 -2487
Parker 09:00:44 -68.7 Dark Up 51.7 187.1 Up 08:45:44 - 09:15:44 -2492
George/Scottsdale 09:00:35 -67.3 Dark Up 51.9 191.1 Up 08:45:35 - 09:15:35 -2492
Blythe 09:00:45 -69.3 Dark Up 52.3 186.7 Up 08:45:45 - 09:15:45 -2541
Wildwood 09:01:00 -71.5 Dark Up 52.0 180.3 Up 08:46:00 - 09:16:00 -2559
Idyllwild 09:00:53 -70.6 Dark Up 52.3 183.3 Up 08:45:53 - 09:15:53 -2561
Calipatria 09:00:48 -70.2 Dark Up 52.9 185.3 Up 08:45:48 - 09:15:48 -2597
Yuma 09:00:44 -69.8 Dark Up 53.2 186.8 Up 08:45:44 - 09:15:44 -2622

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 544977, (2022/01/19 09:01UT)
Object            RA         Dec     mag  sep  mel
Regulus        10:08:22.0 +11:58:02  1.3 23.08  16
Alphard        09:27:35.2 -08:39:30  2.0  8.17  30
PPM 191823     08:54:17.4 -05:26:04  6.4  2.26  27
PPM 191939     09:01:23.0 -03:22:06  8.0  0.53  25
PPM 191936     09:01:03.4 -03:39:49  9.7  0.23  25
544977         09:00:52.5 -03:53:06 14.5        25
Positions are for J2000

Event circumstances last updated at 2020/03/01 23:02:48 UT

Marc W. Buie, Southwest Research Institute

RECON