RECON: TNO occultation with 03YJ179

Event between 03YJ179 and star GA1140:01935924 with event index number of 1022991

Geocentric closest approach at 2020/12/19 10:48:44 UTC

J2000 position of star is 06:10:02.8 +24:42:44
Equinox of date position of star is 06:11:14.5 +24:42:26
Stellar brightness G=10.3, use SENSEUP=4
Star is 123 degrees from the moon. Moon is 26% illuminated.
TNO apparent brightness V=23.0

[RECON map]
TNO is 40.3 AU from the Sun and 39.3 AU from the Earth.
The TNO is moving 25.3 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 351 seconds.
The 1-sigma cross-track error in the shadow position is 1455 km.
The sky-plane scale is 28524.5 km/arcsec.

The TNO has an absolute magnitude Hv=7.0
Diameter=235.5 km assuming a 5% albedo -- 9.3 sec chord
Diameter=96.1 km assuming a 30% albedo -- 3.8 sec chord
Dynamical classification is CLASSICAL
 
 
 
 
 
 

Star training set for 03YJ179, (2020/12/19 10:49UT)
Object            RA         Dec     mag  sep  mel
Betelgeuse     05:56:18.5 +07:24:33  0.4 17.67 117
Alnath         05:27:37.2 +28:37:24  1.6 10.52 114
3 Gem          06:11:00.4 +23:06:29  5.5  1.60 123
5 Gem          06:12:49.5 +24:24:49  6.7  0.45 124
PPM 095531     06:11:14.2 +24:36:47  9.6  0.10 123
03YJ179        06:11:20.1 +24:42:25 10.3       124
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 2.6 sigma about the mid-time.
The median site spacing is 20.2 km RECON observability=1.0 and success probability=20.3%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Kelowna 10:47:07 -47.4 Dark Down 51.1 244.0 Up 10:32:07 - 11:02:07 2625
Summerland 10:47:06 -47.7 Dark Down 51.4 244.0 Up 10:32:06 - 11:02:06 2592
Penticton 10:47:06 -47.6 Dark Down 51.4 244.2 Up 10:32:06 - 11:02:06 2588
Okanagan Falls 10:47:05 -47.7 Dark Down 51.5 244.4 Up 10:32:05 - 11:02:05 2570
Oliver 10:47:05 -47.8 Dark Down 51.5 244.6 Up 10:32:05 - 11:02:05 2556
Anarchist Mountain Observatory 10:47:04 -47.7 Dark Down 51.5 245.0 Up 10:32:04 - 11:02:04 2544
Oroville 10:47:04 -47.8 Dark Down 51.6 245.0 Up 10:32:04 - 11:02:04 2535
Tonasket 10:47:04 -47.9 Dark Down 51.7 245.3 Up 10:32:04 - 11:02:04 2514
Okanogan 10:47:04 -48.1 Dark Down 51.9 245.5 Up 10:32:04 - 11:02:04 2479
Brewster 10:47:03 -48.3 Dark Down 52.1 245.6 Up 10:32:03 - 11:02:03 2450
Manson/Chelan 10:47:04 -48.6 Dark Down 52.4 245.4 Up 10:32:04 - 11:02:04 2423
Entiat 10:47:04 -48.7 Dark Down 52.6 245.6 Up 10:32:04 - 11:02:04 2400
Wenatchee 10:47:03 -48.9 Dark Down 52.8 245.8 Up 10:32:03 - 11:02:03 2374
Ellensburg 10:47:03 -49.2 Dark Down 53.1 246.0 Up 10:32:03 - 11:02:03 2331
Yakima 10:47:02 -49.3 Dark Down 53.2 246.5 Up 10:32:02 - 11:02:02 2292
Pasco 10:46:58 -48.5 Dark Down 52.5 248.5 Up 10:31:58 - 11:01:58 2290
Toppenish/White Swan 10:47:01 -49.3 Dark Down 53.2 247.0 Up 10:32:01 - 11:02:01 2275
PNWRO 10:46:57 -48.4 Dark Down 52.4 249.0 Up 10:31:57 - 11:01:57 2271
George/Umatilla 10:46:58 -48.7 Dark Down 52.7 248.6 Up 10:31:58 - 11:01:58 2253
Goldendale 10:47:01 -49.7 Dark Down 53.7 247.2 Up 10:32:01 - 11:02:01 2213
The Dalles 10:47:02 -50.1 Dark Down 54.0 247.1 Up 10:32:02 - 11:02:02 2184
Maupin 10:47:01 -50.1 Dark Down 54.1 247.7 Up 10:32:01 - 11:02:01 2145
Madras/Culver 10:47:00 -50.3 Dark Down 54.4 248.4 Up 10:32:00 - 11:02:00 2091
Niwot 10:46:14 -39.6 Dark Down 43.9 267.0 Up 10:31:14 - 11:01:14 2058
Redmond 10:46:59 -50.5 Dark Down 54.5 248.8 Up 10:31:59 - 11:01:59 2055
Sisters 10:47:00 -50.7 Dark Down 54.8 248.3 Up 10:32:00 - 11:02:00 2049
SwRI 10:46:14 -39.7 Dark Down 44.0 267.0 Up 10:31:14 - 11:01:14 2046
Bend 10:46:59 -50.6 Dark Down 54.7 248.9 Up 10:31:59 - 11:01:59 2032
Oregon Observatory 10:46:59 -50.8 Dark Down 54.8 249.0 Up 10:31:59 - 11:01:59 2012
La Pine/Gilchrist 10:46:59 -50.9 Dark Down 55.0 249.2 Up 10:31:59 - 11:01:59 1991
North Lake 10:46:57 -50.6 Dark Down 54.7 250.4 Up 10:31:57 - 11:01:57 1961
Paisley 10:46:54 -50.5 Dark Down 54.6 251.5 Up 10:31:54 - 11:01:54 1914
Chiloquin 10:46:58 -51.5 Dark Down 55.6 250.3 Up 10:31:58 - 11:01:58 1873
Lakeview 10:46:53 -50.5 Dark Down 54.7 252.4 Up 10:31:53 - 11:01:53 1869
Klamath Falls 10:46:57 -51.5 Dark Down 55.6 250.9 Up 10:31:57 - 11:01:57 1841
Tulelake 10:46:56 -51.4 Dark Down 55.5 251.6 Up 10:31:56 - 11:01:56 1821
Cedarville 10:46:52 -50.6 Dark Down 54.7 253.4 Up 10:31:52 - 11:01:52 1808
Fall River/Burney 10:46:54 -51.6 Dark Down 55.7 252.9 Up 10:31:54 - 11:01:54 1732
Susanville 10:46:51 -51.2 Dark Down 55.4 254.5 Up 10:31:51 - 11:01:51 1686
Gimple 10:46:51 -51.4 Dark Down 55.6 254.7 Up 10:31:51 - 11:01:51 1653
Greenville 10:46:51 -51.5 Dark Down 55.7 254.6 Up 10:31:51 - 11:01:51 1652
Quincy 10:46:51 -51.5 Dark Down 55.7 254.9 Up 10:31:51 - 11:01:51 1631
Portola 10:46:49 -51.2 Dark Down 55.4 255.5 Up 10:31:49 - 11:01:49 1629
Reno 10:46:47 -50.7 Dark Down 55.0 256.5 Up 10:31:47 - 11:01:47 1618
Carson City 10:46:46 -50.8 Dark Down 55.1 257.0 Up 10:31:46 - 11:01:46 1582
Yerington 10:46:45 -50.3 Dark Down 54.6 257.8 Up 10:31:45 - 11:01:45 1578
Gardnerville 10:46:46 -50.8 Dark Down 55.1 257.4 Up 10:31:46 - 11:01:46 1559
Hawthorne 10:46:42 -50.0 Dark Down 54.3 258.9 Up 10:31:42 - 11:01:42 1544
Tonopah 10:46:37 -49.0 Dark Down 53.3 260.6 Up 10:31:37 - 11:01:37 1531
Lee Vining 10:46:43 -50.5 Dark Down 54.8 259.3 Up 10:31:43 - 11:01:43 1475
Bishop 10:46:40 -50.0 Dark Down 54.4 260.7 Up 10:31:40 - 11:01:40 1432
Beatty 10:46:34 -48.8 Dark Down 53.2 262.5 Up 10:31:34 - 11:01:34 1426
Indian Springs 10:46:31 -48.0 Dark Down 52.4 263.7 Up 10:31:31 - 11:01:31 1421
Henderson 10:46:28 -47.5 Dark Down 51.9 264.9 Up 10:31:28 - 11:01:28 1386
Lone Pine 10:46:37 -49.9 Dark Down 54.2 262.0 Up 10:31:37 - 11:01:37 1363
Patrick 10:46:24 -46.6 Dark Down 51.0 266.4 Up 10:31:24 - 11:01:24 1353
DCO 10:46:22 -46.0 Dark Down 50.5 267.2 Up 10:31:22 - 11:01:22 1342
Searchlight/Boulder City 10:46:27 -47.5 Dark Down 51.9 265.6 Up 10:31:27 - 11:01:27 1330
Kingman/Dolan Springs 10:46:24 -46.8 Dark Down 51.2 266.5 Up 10:31:24 - 11:01:24 1325
Laughlin/Bullhead City 10:46:25 -47.2 Dark Down 51.6 266.2 Up 10:31:25 - 11:01:25 1309
Mohave Valley 10:46:25 -47.2 Dark Down 51.6 266.6 Up 10:31:25 - 11:01:25 1281
Lake Havasu City 10:46:24 -47.0 Dark Down 51.4 267.2 Up 10:31:24 - 11:01:24 1248
Parker 10:46:23 -47.0 Dark Down 51.4 267.7 Up 10:31:23 - 11:01:23 1213
CPSLO 10:46:43 -52.1 Dark Down 56.5 261.9 Up 10:31:43 - 11:01:43 1167
Blythe 10:46:23 -47.3 Dark Down 51.7 268.2 Up 10:31:23 - 11:01:23 1151
Idyllwild 10:46:29 -49.0 Dark Down 53.4 266.8 Up 10:31:29 - 11:01:29 1105
Wildwood 10:46:35 -50.5 Dark Down 55.0 265.1 Up 10:31:35 - 11:01:35 1093
Calipatria 10:46:25 -48.0 Dark Down 52.5 268.3 Up 10:31:25 - 11:01:25 1075
Yuma 10:46:22 -47.3 Dark Down 51.8 269.3 Up 10:31:22 - 11:01:22 1055

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 03YJ179, (2020/12/19 10:49UT)
Object            RA         Dec     mag  sep  mel
Betelgeuse     05:55:10.3 +07:24:26  0.4 17.67 117
Alnath         05:26:17.5 +28:36:23  1.6 10.52 114
3 Gem          06:09:44.0 +23:06:48  5.5  1.60 123
5 Gem          06:11:32.3 +24:25:12  6.7  0.45 124
PPM 095531     06:09:56.9 +24:37:07  9.6  0.10 123
03YJ179        06:10:02.8 +24:42:44 10.3       123
Positions are for J2000

Event circumstances last updated at 2019/06/08 00:45:27 UT

Marc W. Buie, Southwest Research Institute

RECON