RECON: TNO occultation with 73480

Event between (73480) 02PN34 and star GA1200:00389357 with event index number of 1058315

Geocentric closest approach at 2021/02/25 03:28:00 UTC

J2000 position of star is 02:23:06.6 +30:52:59
Equinox of date position of star is 02:24:21.4 +30:58:41
Stellar brightness G=14.1, use SENSEUP=64 with the MallinCam and and exposure time of 1 seconds with the QHY174 camera.
Star is 84 degrees from the moon. Moon is 94% illuminated.
TNO apparent brightness V=22.8

[RECON map]
TNO is 25.3 AU from the Sun and 25.6 AU from the Earth.
The TNO is moving 18.6 km/sec on the sky relative to the star, or, 3.6 arcsec/hr.
The 1-sigma error in the time of the event is 70 seconds.
The 1-sigma cross-track error in the shadow position is 966 km.
The sky-plane scale is 18579.6 km/arcsec.

The TNO has an absolute magnitude Hv=8.5
Diameter=118.6 km assuming a 5% albedo -- 6.4 sec chord
Diameter=48.4 km assuming a 30% albedo -- 2.6 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 

Star training set for 73480, (2021/02/25 03:28UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:37:08.2 +16:33:00  0.8 33.45  59
Hamal          02:08:22.2 +23:33:41  2.0  8.22  90
13 Tri         02:30:03.3 +30:01:33  6.5  1.55  83
PPM 067327     02:27:20.2 +31:00:03  8.4  0.64  83
PPM 067239     02:22:38.1 +30:55:01 10.0  0.37  84
PPM 067287     02:25:21.9 +30:46:35 10.3  0.30  84
73480          02:24:21.6 +30:58:42 14.1        84
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 19.9 km RECON observability=1.0 and success probability=17.5%
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 03:30:37 -19.7 Dark Up 46.6 264.1 Up 03:24:16 - 03:36:59 -1101
Kelowna 03:30:39 -19.7 Dark Up 46.7 264.4 Up 03:24:17 - 03:37:00 -1137
Peachland 03:30:39 -19.5 Dark Up 46.9 264.2 Up 03:24:17 - 03:37:00 -1156
Summerland 03:30:40 -19.6 Dark Up 46.9 264.5 Up 03:24:18 - 03:37:01 -1165
Penticton 03:30:40 -19.7 Dark Up 46.8 264.6 Up 03:24:19 - 03:37:02 -1167
Oliver 03:30:41 -19.8 Dark Up 46.8 265.0 Up 03:24:20 - 03:37:03 -1196
Anarchist Mountain Observatory 03:30:43 -19.9 Dark Up 46.7 265.4 Up 03:24:21 - 03:37:04 -1202
Tonasket 03:30:44 -19.9 Dark Up 46.8 265.6 Up 03:24:22 - 03:37:05 -1230
Okanogan 03:30:45 -19.9 Dark Up 46.9 265.9 Up 03:24:24 - 03:37:07 -1263
Brewster 03:30:46 -19.8 Dark Up 47.1 266.0 Up 03:24:24 - 03:37:07 -1292
Manson/Chelan 03:30:46 -19.6 Dark Up 47.3 265.9 Up 03:24:24 - 03:37:07 -1322
Dunrhomin 03:31:47 -31.9 Dark Up 35.8 282.6 Up 03:25:25 - 03:38:08 -1345
Wenatchee 03:30:47 -19.5 Dark Up 47.5 266.3 Up 03:24:26 - 03:37:09 -1368
Victoria 03:30:35 -17.3 AT Up 49.5 262.5 Up 03:24:13 - 03:36:56 -1381
Ellensburg 03:30:48 -19.4 Dark Up 47.6 266.6 Up 03:24:27 - 03:37:10 -1410
Pasco 03:30:55 -20.5 Dark Up 46.7 268.5 Up 03:24:33 - 03:37:16 -1421
PNWRO 03:30:56 -20.7 Dark Up 46.5 269.0 Up 03:24:34 - 03:37:17 -1433
Yakima 03:30:50 -19.5 Dark Up 47.7 267.1 Up 03:24:28 - 03:37:11 -1445
Toppenish/White Swan 03:30:51 -19.6 Dark Up 47.6 267.4 Up 03:24:30 - 03:37:13 -1457
Goldendale 03:30:52 -19.4 Dark Up 47.9 267.7 Up 03:24:31 - 03:37:14 -1519
The Dalles 03:30:52 -19.2 Dark Up 48.1 267.7 Up 03:24:30 - 03:37:13 -1552
Maupin 03:30:54 -19.3 Dark Up 48.1 268.2 Up 03:24:32 - 03:37:15 -1583
Redmond 03:30:57 -19.4 Dark Up 48.2 269.2 Up 03:24:36 - 03:37:19 -1664
Sisters 03:30:56 -19.1 Dark Up 48.4 268.9 Up 03:24:35 - 03:37:18 -1677
Bend 03:30:58 -19.3 Dark Up 48.3 269.3 Up 03:24:36 - 03:37:19 -1688
Oregon Observatory 03:30:58 -19.2 Dark Up 48.4 269.4 Up 03:24:37 - 03:37:20 -1708
La Pine/Gilchrist 03:30:59 -19.2 Dark Up 48.4 269.6 Up 03:24:37 - 03:37:20 -1728
North Lake 03:31:02 -19.7 Dark Up 47.9 270.5 Up 03:24:40 - 03:37:23 -1743
Paisley 03:31:05 -20.0 Dark Up 47.7 271.4 Up 03:24:44 - 03:37:27 -1777
Lakeview 03:31:07 -20.2 Dark Up 47.5 272.1 Up 03:24:46 - 03:37:29 -1814
Chiloquin 03:31:02 -19.1 Dark Up 48.6 270.7 Up 03:24:40 - 03:37:23 -1839
Cedarville 03:31:10 -20.4 Dark Up 47.3 272.9 Up 03:24:49 - 03:37:32 -1865
Klamath Falls 03:31:03 -19.2 Dark Up 48.6 271.1 Up 03:24:42 - 03:37:25 -1866
Fall River/Burney 03:31:09 -19.6 Dark Up 48.2 272.7 Up 03:24:47 - 03:37:30 -1956
Susanville 03:31:13 -20.2 Dark Up 47.6 273.8 Up 03:24:52 - 03:37:35 -1983
Gimple 03:31:14 -20.1 Dark Up 47.8 274.0 Up 03:24:52 - 03:37:35 -2016
Greenville 03:31:13 -20.0 Dark Up 47.8 274.0 Up 03:24:52 - 03:37:35 -2019
Reno 03:31:18 -20.9 Dark Up 46.9 275.3 Up 03:24:56 - 03:37:39 -2026
Portola 03:31:16 -20.4 Dark Up 47.4 274.6 Up 03:24:54 - 03:37:37 -2029
Quincy 03:31:14 -20.0 Dark Up 47.8 274.2 Up 03:24:52 - 03:37:35 -2037
Yerington 03:31:22 -21.5 Dark Up 46.3 276.2 Up 03:25:01 - 03:37:44 -2049
Tonopah 03:31:30 -23.2 Dark Up 44.7 278.2 Up 03:25:09 - 03:37:52 -2050
Carson City 03:31:20 -21.0 Dark Up 46.8 275.7 Up 03:24:58 - 03:37:41 -2057
Hawthorne 03:31:25 -22.0 Dark Up 45.8 277.0 Up 03:25:04 - 03:37:47 -2068
Gardnerville 03:31:21 -21.1 Dark Up 46.8 276.0 Up 03:24:59 - 03:37:42 -2077
Indian Springs 03:31:39 -24.6 Dark Up 43.2 280.4 Up 03:25:18 - 03:38:01 -2116
Henderson 03:31:44 -25.2 Dark Up 42.5 281.2 Up 03:25:22 - 03:38:05 -2133
Beatty 03:31:36 -23.7 Dark Up 44.1 279.6 Up 03:25:14 - 03:37:57 -2134
Patrick 03:31:48 -26.2 Dark Up 41.5 282.2 Up 03:25:27 - 03:38:10 -2138
Lee Vining 03:31:26 -21.7 Dark Up 46.2 277.3 Up 03:25:04 - 03:37:47 -2139
Bishop 03:31:30 -22.3 Dark Up 45.5 278.3 Up 03:25:08 - 03:37:51 -2162
Kingman/Dolan Springs 03:31:48 -26.1 Dark Up 41.6 282.3 Up 03:25:27 - 03:38:10 -2167
Laughlin/Bullhead City 03:31:47 -25.7 Dark Up 42.0 282.1 Up 03:25:26 - 03:38:09 -2192
George/Scottsdale 03:31:59 -28.1 Dark Up 39.5 284.5 Up 03:25:37 - 03:38:20 -2197
Mohave Valley 03:31:48 -25.7 Dark Up 41.9 282.4 Up 03:25:27 - 03:38:10 -2216
Lake Havasu City 03:31:50 -26.0 Dark Up 41.7 282.8 Up 03:25:29 - 03:38:12 -2241
Parker 03:31:51 -26.0 Dark Up 41.5 283.2 Up 03:25:30 - 03:38:13 -2271
Blythe 03:31:52 -25.9 Dark Up 41.7 283.5 Up 03:25:31 - 03:38:14 -2331
Idyllwild 03:31:47 -24.1 Dark Up 43.4 282.6 Up 03:25:25 - 03:38:08 -2416
Yuma 03:31:56 -25.9 Dark Up 41.5 284.3 Up 03:25:34 - 03:38:17 -2417
Calipatria 03:31:52 -25.1 Dark Up 42.3 283.6 Up 03:25:30 - 03:38:13 -2419
CPSLO 03:31:31 -20.6 Dark Up 47.0 279.4 Up 03:25:09 - 03:37:52 -2446
Wildwood 03:31:40 -22.5 Dark Up 45.1 281.5 Up 03:25:19 - 03:38:02 -2468

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 73480, (2021/02/25 03:28UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:35:55.3 +16:30:29  0.8 33.45  59
Hamal          02:07:10.7 +23:27:42  2.0  8.22  90
13 Tri         02:28:48.4 +29:55:56  6.5  1.55  83
PPM 067327     02:26:05.1 +30:54:23  8.4  0.64  83
PPM 067239     02:21:23.3 +30:49:16 10.0  0.37  84
PPM 067287     02:24:06.9 +30:40:52 10.3  0.30  84
73480          02:23:06.6 +30:52:59 14.1        84
Positions are for J2000

Event circumstances last updated at 2021/02/06 20:38:20 UT

Marc W. Buie, Southwest Research Institute

RECON