RECON: TNO occultation with 230965

Event between (230965) 04XA192 and star GA1360:04015347 with event index number of 1055590

Geocentric closest approach at 2021/02/20 07:45:59 UTC

J2000 position of star is 07:50:35.3 +47:19:13
Equinox of date position of star is 07:52:03.0 +47:16:04
Stellar brightness G=15.8, use SENSEUP=128
Star is 49 degrees from the moon. Moon is 55% illuminated.
TNO apparent brightness V=25.6

[RECON map]
TNO is 35.5 AU from the Sun and 34.8 AU from the Earth.
The TNO is moving 21.3 km/sec on the sky relative to the star, or, 3.0 arcsec/hr.
The 1-sigma error in the time of the event is 126 seconds.
The 1-sigma cross-track error in the shadow position is 2408 km.
The sky-plane scale is 25243.2 km/arcsec.

The TNO has an absolute magnitude Hv=10.0
Diameter=871.0 km assuming a 5% albedo -- 2.8 sec chord
Diameter=355.6 km assuming a 30% albedo -- 1.2 sec chord
Dynamical classification is SCATNEAR
 
 
 
 
 
 

Star training set for 230965, (2021/02/20 07:46UT)
Object            RA         Dec     mag  sep  mel
Pollux         07:46:36.4 +27:58:24  1.1 19.32  46
34Bet Aur      06:01:04.8 +44:56:50  1.9 19.28  31
26 Lyn         07:56:14.6 +47:30:28  5.4  0.74  50
PPM 050140     07:50:04.7 +47:42:34  8.5  0.56  49
PPM 050163     07:52:38.0 +47:04:44  8.8  0.21  49
230965         07:52:07.3 +47:15:55 15.8        49
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 24.5 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)
Clarence Fulton 07:44:20 -50.2 Dark Up 70.4 272.9 Up 07:33:18 - 07:55:21 -1440
Kelowna 07:44:20 -50.5 Dark Up 70.5 273.9 Up 07:33:19 - 07:55:22 -1484
Peachland 07:44:21 -50.6 Dark Up 70.7 274.0 Up 07:33:20 - 07:55:23 -1497
Summerland 07:44:21 -50.8 Dark Up 70.6 274.5 Up 07:33:19 - 07:55:22 -1513
Penticton 07:44:21 -50.8 Dark Up 70.5 274.7 Up 07:33:19 - 07:55:22 -1520
Oliver 07:44:20 -51.2 Dark Up 70.5 275.7 Up 07:33:19 - 07:55:22 -1560
Anarchist Mountain Observatory 07:44:20 -51.4 Dark Up 70.3 276.3 Up 07:33:18 - 07:55:21 -1578
Tonasket 07:44:19 -51.7 Dark Up 70.4 277.1 Up 07:33:18 - 07:55:21 -1613
Victoria 07:44:33 -51.2 Dark Up 72.9 275.6 Up 07:33:31 - 07:55:34 -1636
Okanogan 07:44:20 -52.0 Dark Up 70.4 278.0 Up 07:33:19 - 07:55:22 -1650
Brewster 07:44:21 -52.2 Dark Up 70.5 278.7 Up 07:33:20 - 07:55:23 -1681
Manson/Chelan 07:44:22 -52.4 Dark Up 70.7 279.1 Up 07:33:20 - 07:55:23 -1705
Entiat 07:44:22 -52.6 Dark Up 70.7 279.7 Up 07:33:21 - 07:55:24 -1730
Wenatchee 07:44:22 -52.8 Dark Up 70.7 280.4 Up 07:33:21 - 07:55:24 -1758
Ellensburg 07:44:23 -53.2 Dark Up 70.8 281.4 Up 07:33:21 - 07:55:24 -1804
Yakima 07:44:23 -53.6 Dark Up 70.7 282.6 Up 07:33:22 - 07:55:25 -1849
Toppenish/White Swan 07:44:23 -53.8 Dark Up 70.6 283.2 Up 07:33:21 - 07:55:24 -1873
Pasco 07:44:19 -54.1 Dark Up 69.7 283.9 Up 07:33:18 - 07:55:21 -1883
PNWRO 07:44:18 -54.4 Dark Up 69.5 284.6 Up 07:33:16 - 07:55:19 -1910
Goldendale 07:44:24 -54.3 Dark Up 70.7 284.7 Up 07:33:22 - 07:55:25 -1935
The Dalles 07:44:26 -54.5 Dark Up 70.9 285.2 Up 07:33:24 - 07:55:27 -1960
Maupin 07:44:25 -54.9 Dark Up 70.7 286.4 Up 07:33:23 - 07:55:26 -2007
Sisters 07:44:27 -55.6 Dark Up 70.8 288.7 Up 07:33:25 - 07:55:28 -2105
Redmond 07:44:26 -55.7 Dark Up 70.5 288.8 Up 07:33:24 - 07:55:27 -2107
Bend 07:44:25 -55.9 Dark Up 70.5 289.4 Up 07:33:24 - 07:55:27 -2131
Oregon Observatory 07:44:27 -56.1 Dark Up 70.6 289.9 Up 07:33:26 - 07:55:29 -2150
La Pine/Gilchrist 07:44:27 -56.2 Dark Up 70.5 290.4 Up 07:33:25 - 07:55:28 -2173
North Lake 07:44:25 -56.8 Dark Up 70.0 291.5 Up 07:33:24 - 07:55:27 -2220
Paisley 07:44:24 -57.4 Dark Up 69.5 292.9 Up 07:33:22 - 07:55:25 -2280
Klamath Falls 07:44:28 -57.6 Dark Up 70.2 294.2 Up 07:33:27 - 07:55:30 -2333
Lakeview 07:44:23 -57.9 Dark Up 69.2 294.1 Up 07:33:22 - 07:55:25 -2336
Niwot 07:43:29 -60.0 Dark Up 58.2 297.7 Up 07:32:27 - 07:54:30 -2403
Cedarville 07:44:23 -58.6 Dark Up 68.8 295.6 Up 07:33:21 - 07:55:24 -2407
SwRI 07:43:30 -60.1 Dark Up 58.2 297.9 Up 07:32:28 - 07:54:31 -2416
Fall River/Burney 07:44:27 -58.8 Dark Up 69.4 297.0 Up 07:33:26 - 07:55:29 -2462
Susanville 07:44:24 -59.6 Dark Up 68.6 298.3 Up 07:33:23 - 07:55:26 -2531
Greenville 07:44:25 -59.8 Dark Up 68.7 299.0 Up 07:33:24 - 07:55:27 -2561
Gimple 07:44:25 -59.8 Dark Up 68.6 299.0 Up 07:33:23 - 07:55:26 -2561
Quincy 07:44:26 -60.0 Dark Up 68.6 299.4 Up 07:33:24 - 07:55:27 -2583
Portola 07:44:24 -60.2 Dark Up 68.2 299.6 Up 07:33:22 - 07:55:25 -2596
Reno 07:44:21 -60.6 Dark Up 67.6 299.9 Up 07:33:20 - 07:55:23 -2624
Carson City 07:44:22 -60.9 Dark Up 67.4 300.7 Up 07:33:20 - 07:55:23 -2663
Yerington 07:44:18 -61.2 Dark Up 66.9 300.9 Up 07:33:17 - 07:55:20 -2682
Gardnerville 07:44:21 -61.2 Dark Up 67.3 301.2 Up 07:33:20 - 07:55:23 -2689
Hawthorne 07:44:17 -61.8 Dark Up 66.3 301.6 Up 07:33:15 - 07:55:18 -2730
Tonopah 07:44:12 -62.4 Dark Up 65.2 302.1 Up 07:33:11 - 07:55:14 -2774
Lee Vining 07:44:19 -62.2 Dark Up 66.4 302.9 Up 07:33:17 - 07:55:20 -2794
Bishop 07:44:17 -62.9 Dark Up 65.6 303.7 Up 07:33:15 - 07:55:18 -2855
Beatty 07:44:10 -63.6 Dark Up 64.2 304.0 Up 07:33:09 - 07:55:12 -2896
Indian Springs 07:44:06 -64.1 Dark Up 63.3 304.2 Up 07:33:04 - 07:55:07 -2923
Henderson 07:44:03 -64.7 Dark Up 62.6 304.9 Up 07:33:02 - 07:55:05 -2975
Patrick 07:44:00 -65.4 Dark Up 61.5 305.5 Up 07:32:58 - 07:55:01 -3032
Searchlight/Boulder City 07:44:03 -65.2 Dark Up 62.2 305.8 Up 07:33:01 - 07:55:04 -3036
DCO 07:43:56 -65.7 Dark Up 60.9 305.8 Up 07:32:54 - 07:54:57 -3057
Kingman/Dolan Springs 07:44:00 -65.6 Dark Up 61.5 305.9 Up 07:32:58 - 07:55:01 -3057
Laughlin/Bullhead City 07:44:02 -65.6 Dark Up 61.8 306.1 Up 07:33:00 - 07:55:03 -3064
CPSLO 07:44:26 -64.4 Dark Up 65.8 308.4 Up 07:33:25 - 07:55:28 -3084
Mohave Valley 07:44:02 -65.8 Dark Up 61.7 306.5 Up 07:33:01 - 07:55:04 -3093
Lake Havasu City 07:44:01 -66.3 Dark Up 61.3 307.0 Up 07:33:00 - 07:55:03 -3134
Parker 07:44:01 -66.6 Dark Up 61.0 307.5 Up 07:32:59 - 07:55:02 -3171
George/Scottsdale 07:43:52 -67.1 Dark Up 59.2 307.3 Up 07:32:50 - 07:54:53 -3189
Wildwood 07:44:17 -66.1 Dark Up 63.7 309.4 Up 07:33:16 - 07:55:19 -3207
Blythe 07:44:02 -67.1 Dark Up 60.9 308.4 Up 07:33:00 - 07:55:03 -3229
Idyllwild 07:44:10 -66.8 Dark Up 62.3 309.0 Up 07:33:09 - 07:55:12 -3234
Calipatria 07:44:06 -67.5 Dark Up 61.2 309.4 Up 07:33:04 - 07:55:07 -3290
Yuma 07:44:03 -68.0 Dark Up 60.3 309.7 Up 07:33:01 - 07:55:04 -3327

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 230965, (2021/02/20 07:46UT)
Object            RA         Dec     mag  sep  mel
Pollux         07:45:18.0 +28:01:33  1.1 19.32  46
34Bet Aur      05:59:31.6 +44:56:51  1.9 19.28  31
26 Lyn         07:54:42.6 +47:33:53  5.4  0.74  50
PPM 050140     07:48:32.1 +47:45:49  8.5  0.56  49
PPM 050163     07:51:06.1 +47:08:03  8.8  0.21  49
230965         07:50:35.3 +47:19:13 15.8        49
Positions are for J2000

Event circumstances last updated at 2020/02/24 22:01:08 UT

Marc W. Buie, Southwest Research Institute

RECON