RECON: TNO occultation with 04VM131

Event between 04VM131 and star GA1020:01788371 with event index number of 1364510

Geocentric closest approach at 2025/01/01 09:32:09 UTC

J2000 position of star is 06:25:01.5 +12:05:51
Equinox of date position of star is 06:26:06.8 +12:05:08
Stellar brightness G=15.6, use SENSEUP=128
Star is 152 degrees from the moon. Moon is 3% illuminated.
TNO apparent brightness V=24.2

[RECON map]
TNO is 36.6 AU from the Sun and 35.7 AU from the Earth.
The TNO is moving 25.4 km/sec on the sky relative to the star, or, 3.5 arcsec/hr.
The 1-sigma error in the time of the event is 744 seconds.
The 1-sigma cross-track error in the shadow position is 5000 km.
The sky-plane scale is 25875.9 km/arcsec.

The TNO has an absolute magnitude Hv=8.6
Diameter=115.3 km assuming a 5% albedo -- 4.5 sec chord
Diameter=47.1 km assuming a 30% albedo -- 1.9 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 

Star training set for 04VM131, (2025/01/01 09:32UT)
Object            RA         Dec     mag  sep  mel
Betelgeuse     05:56:31.6 +07:24:35  0.4  8.72 144
Alhena         06:39:09.3 +16:22:33  1.9  5.29 157
PPM 122364     06:24:00.6 +12:33:21  6.4  0.76 152
PPM 122414     06:25:52.4 +12:16:17  8.3  0.23 152
PPM 122446     06:26:53.2 +12:13:34  9.0  0.18 152
PPM 122427     06:26:19.2 +12:01:12 10.9  0.07 152
04VM131        06:26:25.5 +12:04:55 15.6       153
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 1.2 sigma about the mid-time.
The median site spacing is 20.0 km RECON observability=1.0 and success probability=8.1%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Kelowna 09:31:00 -57.8 Dark Down 45.6 221.6 Up 09:16:00 - 09:46:00 -1987
Summerland 09:31:00 -58.2 Dark Down 45.9 221.5 Up 09:16:00 - 09:46:00 -2015
Penticton 09:31:00 -58.2 Dark Down 45.9 221.7 Up 09:16:00 - 09:46:00 -2020
Okanagan Falls 09:30:59 -58.3 Dark Down 46.1 221.8 Up 09:15:59 - 09:45:59 -2036
Oliver 09:30:59 -58.5 Dark Down 46.2 221.9 Up 09:15:59 - 09:45:59 -2050
Anarchist Mountain Observatory 09:30:58 -58.5 Dark Down 46.2 222.3 Up 09:15:58 - 09:45:58 -2062
Oroville 09:30:58 -58.6 Dark Down 46.3 222.2 Up 09:15:58 - 09:45:58 -2069
Tonasket 09:30:58 -58.8 Dark Down 46.5 222.4 Up 09:15:58 - 09:45:58 -2089
Okanogan 09:30:58 -59.1 Dark Down 46.8 222.5 Up 09:15:58 - 09:45:58 -2120
Brewster 09:30:58 -59.4 Dark Down 47.1 222.4 Up 09:15:58 - 09:45:58 -2145
Manson/Chelan 09:30:58 -59.7 Dark Down 47.4 222.1 Up 09:15:58 - 09:45:58 -2167
Entiat 09:30:58 -59.9 Dark Down 47.6 222.1 Up 09:15:58 - 09:45:58 -2187
Wenatchee 09:30:58 -60.1 Dark Down 47.9 222.2 Up 09:15:58 - 09:45:58 -2210
Ellensburg 09:30:58 -60.5 Dark Down 48.3 222.2 Up 09:15:58 - 09:45:58 -2248
Yakima 09:30:57 -60.8 Dark Down 48.6 222.5 Up 09:15:57 - 09:45:57 -2284
Pasco 09:30:53 -60.4 Dark Down 48.1 224.6 Up 09:15:53 - 09:45:53 -2300
Toppenish/White Swan 09:30:57 -60.9 Dark Down 48.7 222.9 Up 09:15:57 - 09:45:57 -2302
PNWRO 09:30:52 -60.4 Dark Down 48.2 225.1 Up 09:15:52 - 09:45:52 -2319
George/Umatilla 09:30:53 -60.7 Dark Down 48.5 224.6 Up 09:15:53 - 09:45:53 -2332
Goldendale 09:30:57 -61.5 Dark Down 49.3 222.8 Up 09:15:57 - 09:45:57 -2355
The Dalles 09:30:58 -61.8 Dark Down 49.6 222.5 Up 09:15:58 - 09:45:58 -2379
Maupin 09:30:56 -62.1 Dark Down 49.9 222.9 Up 09:15:56 - 09:45:56 -2415
Madras/Culver 09:30:56 -62.5 Dark Down 50.3 223.3 Up 09:15:56 - 09:45:56 -2465
Redmond 09:30:56 -62.8 Dark Down 50.6 223.6 Up 09:15:56 - 09:45:56 -2498
Sisters 09:30:56 -63.0 Dark Down 50.7 223.0 Up 09:15:56 - 09:45:56 -2500
Bend 09:30:56 -63.0 Dark Down 50.8 223.6 Up 09:15:56 - 09:45:56 -2519
Oregon Observatory 09:30:56 -63.2 Dark Down 51.0 223.5 Up 09:15:56 - 09:45:56 -2536
La Pine/Gilchrist 09:30:56 -63.4 Dark Down 51.2 223.6 Up 09:15:56 - 09:45:56 -2556
North Lake 09:30:53 -63.4 Dark Down 51.2 224.8 Up 09:15:53 - 09:45:53 -2590
Paisley 09:30:51 -63.5 Dark Down 51.4 225.7 Up 09:15:51 - 09:45:51 -2637
Chiloquin 09:30:55 -64.3 Dark Down 52.1 224.1 Up 09:15:55 - 09:45:55 -2662
Lakeview 09:30:50 -63.8 Dark Down 51.6 226.4 Up 09:15:50 - 09:45:50 -2682
Niwot 09:30:06 -54.9 Dark Down 43.4 245.2 Up 09:15:06 - 09:45:06 -2687
Klamath Falls 09:30:54 -64.5 Dark Down 52.3 224.5 Up 09:15:54 - 09:45:54 -2693
SwRI 09:30:06 -55.0 Dark Down 43.5 245.2 Up 09:15:06 - 09:45:06 -2698
Tulelake 09:30:53 -64.5 Dark Down 52.4 225.2 Up 09:15:53 - 09:45:53 -2715
Cedarville 09:30:49 -64.1 Dark Down 52.0 227.3 Up 09:15:49 - 09:45:49 -2742
Fall River/Burney 09:30:52 -65.1 Dark Down 53.0 226.1 Up 09:15:52 - 09:45:52 -2800
Susanville 09:30:49 -65.1 Dark Down 53.0 227.7 Up 09:15:49 - 09:45:49 -2852
Gimple 09:30:49 -65.4 Dark Down 53.3 227.7 Up 09:15:49 - 09:45:49 -2880
Greenville 09:30:49 -65.4 Dark Down 53.4 227.6 Up 09:15:49 - 09:45:49 -2881
Quincy 09:30:49 -65.5 Dark Down 53.5 227.8 Up 09:15:49 - 09:45:49 -2900
Portola 09:30:47 -65.3 Dark Down 53.3 228.6 Up 09:15:47 - 09:45:47 -2907
Reno 09:30:45 -65.1 Dark Down 53.1 229.7 Up 09:15:45 - 09:45:45 -2926
Carson City 09:30:44 -65.3 Dark Down 53.3 230.1 Up 09:15:44 - 09:45:44 -2960
Yerington 09:30:42 -65.0 Dark Down 53.1 231.1 Up 09:15:42 - 09:45:42 -2971
Gardnerville 09:30:44 -65.4 Dark Down 53.5 230.4 Up 09:15:44 - 09:45:44 -2983
Hawthorne 09:30:40 -64.9 Dark Down 53.0 232.2 Up 09:15:40 - 09:45:40 -3010
Tonopah 09:30:35 -64.2 Dark Down 52.4 234.4 Up 09:15:35 - 09:45:35 -3039
Lee Vining 09:30:41 -65.5 Dark Down 53.7 232.2 Up 09:15:41 - 09:45:41 -3070
Bishop 09:30:38 -65.3 Dark Down 53.6 233.7 Up 09:15:38 - 09:45:38 -3120
Beatty 09:30:32 -64.4 Dark Down 52.8 236.2 Up 09:15:32 - 09:45:32 -3146
Indian Springs 09:30:28 -63.8 Dark Down 52.3 237.8 Up 09:15:28 - 09:45:28 -3164
Lone Pine 09:30:36 -65.4 Dark Down 53.8 235.0 Up 09:15:36 - 09:45:36 -3190
Henderson 09:30:26 -63.5 Dark Down 52.1 239.2 Up 09:15:26 - 09:45:26 -3208
Patrick 09:30:21 -62.8 Dark Down 51.6 241.1 Up 09:15:21 - 09:45:21 -3255
Searchlight/Boulder City 09:30:24 -63.6 Dark Down 52.3 239.9 Up 09:15:24 - 09:45:24 -3263
DCO 09:30:19 -62.4 Dark Down 51.3 242.2 Up 09:15:19 - 09:45:19 -3276
Kingman/Dolan Springs 09:30:21 -63.1 Dark Down 51.9 241.1 Up 09:15:21 - 09:45:21 -3279
Laughlin/Bullhead City 09:30:23 -63.5 Dark Down 52.2 240.6 Up 09:15:23 - 09:45:23 -3288
Mohave Valley 09:30:23 -63.6 Dark Down 52.4 240.9 Up 09:15:23 - 09:45:23 -3315
CPSLO 09:30:42 -67.9 Dark Down 56.3 233.2 Up 09:15:42 - 09:45:42 -3349
Lake Havasu City 09:30:21 -63.5 Dark Down 52.4 241.6 Up 09:15:21 - 09:45:21 -3351
Parker 09:30:21 -63.6 Dark Down 52.5 242.1 Up 09:15:21 - 09:45:21 -3386
Blythe 09:30:21 -64.0 Dark Down 53.0 242.3 Up 09:15:21 - 09:45:21 -3442
Wildwood 09:30:34 -66.9 Dark Down 55.6 237.3 Up 09:15:34 - 09:45:34 -3445
Idyllwild 09:30:28 -65.6 Dark Down 54.5 239.9 Up 09:15:28 - 09:45:28 -3458
Calipatria 09:30:23 -64.9 Dark Down 53.9 241.9 Up 09:15:23 - 09:45:23 -3504
Yuma 09:30:20 -64.3 Dark Down 53.5 243.4 Up 09:15:20 - 09:45:20 -3535

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 04VM131, (2025/01/01 09:32UT)
Object            RA         Dec     mag  sep  mel
Betelgeuse     05:55:10.3 +07:24:26  0.4  8.72 144
Alhena         06:37:42.8 +16:23:57  1.9  5.29 157
PPM 122364     06:22:36.3 +12:34:12  6.4  0.76 152
PPM 122414     06:24:28.3 +12:17:12  8.3  0.23 152
PPM 122446     06:25:29.1 +12:14:31  9.0  0.18 152
PPM 122427     06:24:55.2 +12:02:08 10.9  0.07 152
04VM131        06:25:01.5 +12:05:51 15.6       152
Positions are for J2000

Event circumstances last updated at 2019/06/08 09:49:09 UT

Marc W. Buie, Southwest Research Institute

RECON