RECON: TNO occultation with 131696

Event between (131696) 01XT254 and star GA1040:03321818 with event index number of 1032928

Geocentric closest approach at 2021/01/11 07:47:12 UTC

J2000 position of star is 09:42:58.6 +14:03:06
Equinox of date position of star is 09:44:00.9 +13:57:50
Stellar brightness G=13.4, use SENSEUP=32
Star is 123 degrees from the moon. Moon is 5% illuminated.
TNO apparent brightness V=23.0

[RECON map]
TNO is 36.0 AU from the Sun and 35.2 AU from the Earth.
The TNO is moving 19.9 km/sec on the sky relative to the star, or, 2.8 arcsec/hr.
The 1-sigma error in the time of the event is 115 seconds.
The 1-sigma cross-track error in the shadow position is 1586 km.
The sky-plane scale is 25512.0 km/arcsec.

The TNO has an absolute magnitude Hv=7.4
Diameter=199.5 km assuming a 5% albedo -- 10.0 sec chord
Diameter=81.5 km assuming a 30% albedo -- 4.1 sec chord
Dynamical classification is 7:3EEEE
 
 
 
 
 
 

Star training set for 131696, (2021/01/11 07:47UT)
Object            RA         Dec     mag  sep  mel
Regulus        10:09:29.4 +11:51:49  1.3  6.53 117
16Psi Leo      09:44:52.5 +13:55:28  5.3  0.19 123
PPM 126734     09:44:44.9 +13:20:41  7.7  0.63 123
PPM 126726     09:44:13.9 +14:01:17  8.9  0.07 123
131696         09:44:07.2 +13:57:17 13.4       123
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 24.0 km RECON observability=1.0 and success probability=21.5%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Kelowna 07:50:13 -61.7 Dark Down 43.5 127.3 Up 07:40:08 - 08:00:19 2729
Summerland 07:50:15 -61.7 Dark Down 43.3 126.9 Up 07:40:09 - 08:00:20 2722
Penticton 07:50:14 -62.0 Dark Down 43.6 126.8 Up 07:40:09 - 08:00:20 2692
Okanagan Falls 07:50:15 -62.2 Dark Down 43.7 126.7 Up 07:40:09 - 08:00:20 2673
Oliver 07:50:15 -62.4 Dark Down 43.8 126.6 Up 07:40:10 - 08:00:21 2657
Anarchist Mountain Observatory 07:50:15 -62.6 Dark Down 44.0 126.7 Up 07:40:09 - 08:00:20 2642
Oroville 07:50:15 -62.6 Dark Down 44.0 126.5 Up 07:40:09 - 08:00:20 2634
Tonasket 07:50:15 -62.9 Dark Down 44.2 126.3 Up 07:40:10 - 08:00:21 2611
Okanogan 07:50:16 -63.2 Dark Down 44.3 125.9 Up 07:40:10 - 08:00:21 2576
Brewster 07:50:16 -63.4 Dark Down 44.3 125.5 Up 07:40:10 - 08:00:21 2547
Manson/Chelan 07:50:18 -63.6 Dark Down 44.2 124.9 Up 07:40:12 - 08:00:23 2523
Entiat 07:50:18 -63.8 Dark Down 44.3 124.6 Up 07:40:13 - 08:00:24 2500
Wenatchee 07:50:19 -64.1 Dark Down 44.4 124.3 Up 07:40:13 - 08:00:24 2474
Ellensburg 07:50:20 -64.4 Dark Down 44.5 123.7 Up 07:40:14 - 08:00:25 2431
Yakima 07:50:20 -64.8 Dark Down 44.8 123.4 Up 07:40:15 - 08:00:26 2389
Toppenish/White Swan 07:50:20 -65.1 Dark Down 45.0 123.4 Up 07:40:14 - 08:00:25 2369
Pasco 07:50:16 -65.3 Dark Down 45.8 124.7 Up 07:40:10 - 08:00:21 2369
PNWRO 07:50:16 -65.6 Dark Down 46.0 124.7 Up 07:40:10 - 08:00:21 2347
George/Umatilla 07:50:17 -65.6 Dark Down 45.8 124.2 Up 07:40:12 - 08:00:23 2333
Goldendale 07:50:22 -65.6 Dark Down 45.0 122.5 Up 07:40:16 - 08:00:27 2309
The Dalles 07:50:23 -65.7 Dark Down 44.9 121.9 Up 07:40:17 - 08:00:28 2283
Maupin 07:50:24 -66.1 Dark Down 45.2 121.7 Up 07:40:18 - 08:00:29 2241
Madras/Culver 07:50:23 -66.7 Dark Down 45.5 121.1 Up 07:40:18 - 08:00:29 2185
Redmond 07:50:24 -67.0 Dark Down 45.6 120.8 Up 07:40:19 - 08:00:30 2148
Sisters 07:50:25 -66.9 Dark Down 45.4 120.4 Up 07:40:20 - 08:00:31 2147
Bend 07:50:25 -67.2 Dark Down 45.7 120.4 Up 07:40:19 - 08:00:30 2125
Oregon Observatory 07:50:25 -67.3 Dark Down 45.7 120.1 Up 07:40:20 - 08:00:31 2105
La Pine/Gilchrist 07:50:26 -67.5 Dark Down 45.7 119.9 Up 07:40:20 - 08:00:31 2084
North Lake 07:50:24 -68.1 Dark Down 46.3 120.1 Up 07:40:19 - 08:00:30 2045
Paisley 07:50:24 -68.7 Dark Down 46.8 120.0 Up 07:40:18 - 08:00:29 1991
Chiloquin 07:50:27 -68.5 Dark Down 46.0 118.5 Up 07:40:22 - 08:00:33 1965
Niwot 07:49:29 -69.7 Dark Down 57.3 136.5 Up 07:39:24 - 07:59:35 1942
Lakeview 07:50:24 -69.2 Dark Down 47.2 119.8 Up 07:40:18 - 08:00:29 1940
Klamath Falls 07:50:28 -68.9 Dark Down 46.3 118.3 Up 07:40:23 - 08:00:34 1931
SwRI 07:49:30 -69.8 Dark Down 57.4 136.3 Up 07:39:25 - 07:59:36 1930
Tulelake 07:50:27 -69.2 Dark Down 46.6 118.4 Up 07:40:21 - 08:00:32 1905
Cedarville 07:50:23 -69.9 Dark Down 47.6 119.3 Up 07:40:18 - 08:00:29 1874
Fall River/Burney 07:50:27 -70.1 Dark Down 47.1 117.6 Up 07:40:22 - 08:00:33 1811
Susanville 07:50:25 -70.9 Dark Down 47.9 117.7 Up 07:40:19 - 08:00:30 1752
Gimple 07:50:26 -71.1 Dark Down 47.8 117.3 Up 07:40:20 - 08:00:31 1721
Greenville 07:50:26 -71.1 Dark Down 47.8 117.2 Up 07:40:20 - 08:00:31 1720
Quincy 07:50:26 -71.3 Dark Down 47.9 117.0 Up 07:40:20 - 08:00:31 1699
Portola 07:50:25 -71.5 Dark Down 48.3 117.3 Up 07:40:19 - 08:00:30 1691
Reno 07:50:22 -71.8 Dark Down 48.8 117.7 Up 07:40:17 - 08:00:28 1669
Carson City 07:50:23 -72.2 Dark Down 49.0 117.4 Up 07:40:17 - 08:00:28 1632
Yerington 07:50:21 -72.5 Dark Down 49.5 117.9 Up 07:40:15 - 08:00:26 1618
Gardnerville 07:50:23 -72.4 Dark Down 49.1 117.2 Up 07:40:17 - 08:00:28 1607
Hawthorne 07:50:18 -73.0 Dark Down 50.1 117.9 Up 07:40:13 - 08:00:24 1575
Tonopah 07:50:14 -73.6 Dark Down 51.3 118.9 Up 07:40:09 - 08:00:20 1543
Lee Vining 07:50:21 -73.5 Dark Down 50.0 116.8 Up 07:40:15 - 08:00:26 1510
Bishop 07:50:18 -74.2 Dark Down 50.8 116.9 Up 07:40:13 - 08:00:24 1455
Beatty 07:50:13 -74.8 Dark Down 52.2 118.1 Up 07:40:08 - 08:00:19 1426
Indian Springs 07:50:08 -75.2 Dark Down 53.1 118.9 Up 07:40:03 - 08:00:14 1405
Lone Pine 07:50:18 -75.0 Dark Down 51.4 116.4 Up 07:40:12 - 08:00:23 1378
Henderson 07:50:06 -75.7 Dark Down 53.8 119.1 Up 07:40:01 - 08:00:12 1358
Patrick 07:50:02 -76.3 Dark Down 54.9 119.5 Up 07:39:56 - 08:00:07 1308
Searchlight/Boulder City 07:50:06 -76.3 Dark Down 54.1 118.4 Up 07:40:00 - 08:00:11 1298
DCO 07:49:59 -76.5 Dark Down 55.5 120.0 Up 07:39:53 - 08:00:04 1286
Kingman/Dolan Springs 07:50:02 -76.5 Dark Down 54.9 119.1 Up 07:39:57 - 08:00:08 1281
Laughlin/Bullhead City 07:50:04 -76.6 Dark Down 54.5 118.5 Up 07:39:59 - 08:00:10 1271
Mohave Valley 07:50:04 -76.8 Dark Down 54.6 118.1 Up 07:39:59 - 08:00:10 1242
CPSLO 07:50:27 -75.7 Dark Down 50.0 112.4 Up 07:40:21 - 08:00:32 1209
Lake Havasu City 07:50:04 -77.2 Dark Down 55.0 117.9 Up 07:39:58 - 08:00:09 1203
Parker 07:50:03 -77.6 Dark Down 55.2 117.5 Up 07:39:57 - 08:00:08 1166
Blythe 07:50:04 -78.1 Dark Down 55.2 116.5 Up 07:39:59 - 08:00:10 1105
Wildwood 07:50:19 -77.4 Dark Down 52.0 113.0 Up 07:40:14 - 08:00:25 1102
Idyllwild 07:50:12 -78.0 Dark Down 53.6 114.4 Up 07:40:07 - 08:00:18 1088
Calipatria 07:50:08 -78.6 Dark Down 54.7 114.9 Up 07:40:02 - 08:00:13 1039
Yuma 07:50:04 -79.0 Dark Down 55.6 115.2 Up 07:39:59 - 08:00:10 1005

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 131696, (2021/01/11 07:47UT)
Object            RA         Dec     mag  sep  mel
Regulus        10:08:22.0 +11:58:02  1.3  6.53 117
16Psi Leo      09:43:43.9 +14:01:18  5.3  0.19 123
PPM 126734     09:43:36.5 +13:26:30  7.7  0.63 123
PPM 126726     09:43:05.3 +14:07:06  8.9  0.07 123
131696         09:42:58.6 +14:03:06 13.4       123
Positions are for J2000

Event circumstances last updated at 2019/01/29 03:57:33 UT

Marc W. Buie, Southwest Research Institute

RECON