RECON: TNO occultation with 04VU131

Event between 04VU131 and star GA1100:00479298 with event index number of 1006238

Geocentric closest approach at 2020/09/26 07:36:44 UTC

J2000 position of star is 03:56:50.2 +20:00:02
Equinox of date position of star is 03:57:56.9 +20:03:17
Stellar brightness G=14.2, use SENSEUP=64
Star is 120 degrees from the moon. Moon is 73% illuminated.
TNO apparent brightness V=23.8

[RECON map]
TNO is 41.6 AU from the Sun and 41.1 AU from the Earth.
The TNO is moving 11.4 km/sec on the sky relative to the star, or, 1.4 arcsec/hr.
The 1-sigma error in the time of the event is 235 seconds.
The 1-sigma cross-track error in the shadow position is 1591 km.
The sky-plane scale is 29793.2 km/arcsec.

The TNO has an absolute magnitude Hv=7.5
Diameter=189.7 km assuming a 5% albedo -- 16.6 sec chord
Diameter=77.4 km assuming a 30% albedo -- 6.8 sec chord
Dynamical classification is CLASSICAL
 
 
 
 
 
 

Star training set for 04VU131, (2020/09/26 07:37UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:37:06.8 +16:32:58  0.8  9.91 128
44Zet Per      03:55:26.4 +31:56:37  2.8 11.90 122
PPM 119539     04:02:00.6 +18:15:04  6.5  2.04 121
PPM 093159     04:01:53.4 +20:28:13  8.4  0.99 121
PPM 093096     03:58:05.2 +20:08:33  8.6  0.08 120
04VU131        03:58:02.7 +20:03:34 14.2       121
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 3.8 sigma about the mid-time.
The median site spacing is 16.2 km RECON observability=1.0 and success probability=16.6%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Summerland 07:40:31 -41.6 Dark Up 35.5 101.1 Up 07:25:31 - 07:55:31 2917
Kelowna 07:40:31 -41.5 Dark Up 35.7 101.5 Up 07:25:31 - 07:55:31 2909
Penticton 07:40:36 -41.9 Dark Up 35.7 101.1 Up 07:25:36 - 07:55:36 2890
Okanagan Falls 07:40:36 -42.1 Dark Up 35.7 100.9 Up 07:25:36 - 07:55:36 2878
Oliver 07:40:36 -42.2 Dark Up 35.7 100.9 Up 07:25:36 - 07:55:36 2867
Anarchist Mountain Observatory 07:40:37 -42.4 Dark Up 35.9 100.9 Up 07:25:37 - 07:55:37 2850
Oroville 07:40:38 -42.5 Dark Up 35.9 100.8 Up 07:25:38 - 07:55:38 2847
Tonasket 07:40:40 -42.7 Dark Up 35.9 100.6 Up 07:25:40 - 07:55:40 2831
Okanogan 07:40:44 -43.1 Dark Up 35.9 100.3 Up 07:25:44 - 07:55:44 2813
Brewster 07:40:45 -43.3 Dark Up 35.8 99.9 Up 07:25:45 - 07:55:45 2801
Manson/Chelan 07:40:48 -43.5 Dark Up 35.6 99.5 Up 07:25:48 - 07:55:48 2797
Entiat 07:40:51 -43.7 Dark Up 35.6 99.3 Up 07:25:51 - 07:55:51 2785
Wenatchee 07:40:54 -44.0 Dark Up 35.6 99.0 Up 07:25:54 - 07:55:54 2770
Ellensburg 07:40:57 -44.4 Dark Up 35.5 98.6 Up 07:25:57 - 07:55:57 2748
Yakima 07:40:59 -44.8 Dark Up 35.6 98.3 Up 07:25:59 - 07:55:59 2721
Toppenish/White Swan 07:41:02 -45.0 Dark Up 35.7 98.3 Up 07:26:02 - 07:56:02 2701
Goldendale 07:41:07 -45.5 Dark Up 35.5 97.5 Up 07:26:07 - 07:56:07 2675
The Dalles 07:41:09 -45.7 Dark Up 35.3 97.1 Up 07:26:09 - 07:56:09 2671
Pasco 07:40:57 -45.2 Dark Up 36.6 99.2 Up 07:25:57 - 07:55:57 2653
Maupin 07:41:11 -46.2 Dark Up 35.4 96.9 Up 07:26:11 - 07:56:11 2638
George/Umatilla 07:41:01 -45.5 Dark Up 36.5 98.8 Up 07:26:01 - 07:56:01 2636
PNWRO 07:40:59 -45.4 Dark Up 36.8 99.2 Up 07:25:59 - 07:55:59 2629
Madras/Culver 07:41:15 -46.7 Dark Up 35.5 96.5 Up 07:26:15 - 07:56:15 2600
Sisters 07:41:19 -47.0 Dark Up 35.2 95.9 Up 07:26:19 - 07:56:19 2590
Redmond 07:41:18 -47.1 Dark Up 35.5 96.2 Up 07:26:18 - 07:56:18 2576
Bend 07:41:21 -47.3 Dark Up 35.4 96.0 Up 07:26:21 - 07:56:21 2565
Oregon Observatory 07:41:22 -47.4 Dark Up 35.3 95.8 Up 07:26:22 - 07:56:22 2557
La Pine/Gilchrist 07:41:24 -47.6 Dark Up 35.3 95.6 Up 07:26:24 - 07:56:24 2544
North Lake 07:41:25 -48.1 Dark Up 35.8 95.7 Up 07:26:25 - 07:56:25 2492
Chiloquin 07:41:33 -48.7 Dark Up 35.2 94.6 Up 07:26:33 - 07:56:33 2474
Klamath Falls 07:41:35 -49.1 Dark Up 35.3 94.4 Up 07:26:35 - 07:56:35 2446
Paisley 07:41:29 -48.7 Dark Up 36.1 95.6 Up 07:26:29 - 07:56:29 2440
Tulelake 07:41:36 -49.4 Dark Up 35.5 94.4 Up 07:26:36 - 07:56:36 2416
Lakeview 07:41:30 -49.2 Dark Up 36.3 95.4 Up 07:26:30 - 07:56:30 2396
Fall River/Burney 07:41:42 -50.3 Dark Up 35.7 93.8 Up 07:26:42 - 07:56:42 2344
Cedarville 07:41:36 -49.9 Dark Up 36.5 95.0 Up 07:26:36 - 07:56:36 2341
Susanville 07:41:44 -51.0 Dark Up 36.3 93.9 Up 07:26:44 - 07:56:44 2271
Greenville 07:41:46 -51.2 Dark Up 36.1 93.5 Up 07:26:46 - 07:56:46 2260
Gimple 07:41:47 -51.2 Dark Up 36.1 93.6 Up 07:26:47 - 07:56:47 2257
Quincy 07:41:49 -51.4 Dark Up 36.1 93.4 Up 07:26:49 - 07:56:49 2244
Portola 07:41:47 -51.6 Dark Up 36.5 93.6 Up 07:26:47 - 07:56:47 2218
Reno 07:41:47 -51.9 Dark Up 37.0 93.8 Up 07:26:47 - 07:56:47 2175
Carson City 07:41:50 -52.2 Dark Up 37.0 93.6 Up 07:26:50 - 07:56:50 2146
Gardnerville 07:41:52 -52.5 Dark Up 37.1 93.4 Up 07:26:52 - 07:56:52 2126
Yerington 07:41:48 -52.4 Dark Up 37.5 93.8 Up 07:26:48 - 07:56:48 2109
Hawthorne 07:41:51 -52.9 Dark Up 38.0 93.8 Up 07:26:51 - 07:56:51 2054
Lee Vining 07:41:56 -53.5 Dark Up 37.7 93.1 Up 07:26:56 - 07:56:56 2026
Tonopah 07:41:49 -53.4 Dark Up 39.1 94.4 Up 07:26:49 - 07:56:49 1967
Bishop 07:41:56 -54.1 Dark Up 38.3 93.1 Up 07:26:56 - 07:56:56 1952
Lone Pine 07:42:01 -54.9 Dark Up 38.6 92.7 Up 07:27:01 - 07:57:01 1877
CPSLO 07:42:19 -56.1 Dark Up 36.6 90.2 Up 07:27:19 - 07:57:19 1863
Beatty 07:41:53 -54.6 Dark Up 39.6 93.8 Up 07:26:53 - 07:56:53 1856
Indian Springs 07:41:52 -54.8 Dark Up 40.5 94.2 Up 07:26:52 - 07:56:52 1791
Niwot 07:40:43 -49.8 Dark Down 47.8 105.2 Up 07:25:43 - 07:55:43 1730
SwRI 07:40:45 -49.9 Dark Down 47.7 105.1 Up 07:25:45 - 07:55:45 1724
Henderson 07:41:53 -55.3 Dark Up 41.1 94.2 Up 07:26:53 - 07:56:53 1721
Wildwood 07:42:18 -57.4 Dark Up 38.3 90.5 Up 07:27:18 - 07:57:18 1687
Searchlight/Boulder City 07:41:55 -55.9 Dark Up 41.2 93.7 Up 07:26:55 - 07:56:55 1671
Laughlin/Bullhead City 07:41:56 -56.2 Dark Up 41.5 93.7 Up 07:26:56 - 07:56:56 1633
Patrick 07:41:52 -55.9 Dark Up 42.0 94.3 Up 07:26:52 - 07:56:52 1628
Kingman/Dolan Springs 07:41:54 -56.1 Dark Up 41.9 94.0 Up 07:26:54 - 07:56:54 1616
Mohave Valley 07:41:58 -56.4 Dark Up 41.5 93.5 Up 07:26:58 - 07:56:58 1609
Idyllwild 07:42:13 -57.7 Dark Up 39.8 91.2 Up 07:27:13 - 07:57:13 1587
DCO 07:41:50 -56.1 Dark Up 42.6 94.5 Up 07:26:50 - 07:56:50 1576
Lake Havasu City 07:41:59 -56.8 Dark Up 41.7 93.3 Up 07:26:59 - 07:56:59 1566
Parker 07:42:01 -57.2 Dark Up 41.8 93.0 Up 07:27:01 - 07:57:01 1534
Blythe 07:42:05 -57.7 Dark Up 41.6 92.3 Up 07:27:05 - 07:57:05 1499
Calipatria 07:42:12 -58.3 Dark Up 40.8 91.4 Up 07:27:12 - 07:57:12 1491
Yuma 07:42:11 -58.6 Dark Up 41.6 91.5 Up 07:27:11 - 07:57:11 1420

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 04VU131, (2020/09/26 07:37UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:35:55.3 +16:30:30  0.8  9.91 128
44Zet Per      03:54:07.9 +31:53:01  2.8 11.90 122
PPM 119539     04:00:48.9 +18:11:38  6.5  2.04 121
PPM 093159     04:00:40.7 +20:24:47  8.4  0.99 121
PPM 093096     03:56:52.7 +20:05:01  8.6  0.08 120
04VU131        03:56:50.2 +20:00:02 14.2       120
Positions are for J2000

Event circumstances last updated at 2019/01/29 03:51:26 UT

Marc W. Buie, Southwest Research Institute

RECON