RECON: TNO occultation with 13RP124

Event between 13RP124 and star GA1080:00235235 with event index number of 2703444

Geocentric closest approach at 2026/09/09 08:50:41 UTC

J2000 position of star is 02:15:00.4 +18:56:07
Equinox of date position of star is 02:16:13.8 +19:02:14
Stellar brightness G=15.2, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 106 degrees from the moon. Moon is 4% illuminated.
TNO apparent brightness V=22.7

[RECON map]
TNO is 37.3 AU from the Sun and 36.7 AU from the Earth.
The TNO is moving 15.0 km/sec on the sky relative to the star, or, 2.0 arcsec/hr.
The 1-sigma error in the time of the event is 262 seconds.
The 1-sigma cross-track error in the shadow position is 4824 km.
The sky-plane scale is 26624.0 km/arcsec.

The TNO has an absolute magnitude Hv=6.9
Diameter=245.5 km assuming a 5% albedo -- 16.3 sec chord
Diameter=100.2 km assuming a 30% albedo -- 6.7 sec chord
Dynamical classification is SCATEXTD
 
 
 
 
 
 

Star training set for 13RP124, (2026/09/09 08:51UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:37:27.3 +16:33:39  0.8 33.59  74
Hamal          02:08:41.0 +23:35:15  2.0  4.88 106
15 Ari         02:12:06.7 +19:37:30  5.7  1.18 106
PPM 118048     02:15:20.9 +19:44:18  8.1  0.73 106
PPM 118071     02:16:48.9 +18:57:52  9.2  0.12 106
13RP124        02:16:29.3 +19:03:31 15.2       105
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 3.4 sigma about the mid-time.
The median site spacing is 26.7 km RECON observability=1.0 and success probability=10.7%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Kamloops 08:53:05 -32.9 Dark Down 49.2 129.1 Up 08:38:05 - 09:08:05 1730
Sleaford 08:51:50 -28.0 Dark Down 53.9 149.8 Up 08:36:50 - 09:06:50 1718
Kelowna 08:53:04 -33.5 Dark Down 50.2 129.5 Up 08:38:04 - 09:08:04 1644
Peachland 08:53:05 -33.6 Dark Down 50.1 129.0 Up 08:38:05 - 09:08:05 1638
Summerland 08:53:06 -33.8 Dark Down 50.2 129.0 Up 08:38:06 - 09:08:06 1624
Penticton 08:53:05 -33.8 Dark Down 50.3 129.1 Up 08:38:05 - 09:08:05 1616
Oliver 08:53:06 -34.1 Dark Down 50.5 128.7 Up 08:38:06 - 09:08:06 1584
Victoria 08:53:24 -35.4 Dark Down 48.9 123.5 Up 08:38:24 - 09:08:24 1576
Anarchist Mountain Observatory 08:53:06 -34.3 Dark Down 50.8 128.8 Up 08:38:06 - 09:08:06 1566
Tonasket 08:53:07 -34.6 Dark Down 50.9 128.4 Up 08:38:07 - 09:08:07 1538
Okanogan 08:53:09 -34.9 Dark Down 51.0 127.9 Up 08:38:09 - 09:08:09 1509
Brewster 08:53:11 -35.2 Dark Down 51.1 127.4 Up 08:38:11 - 09:08:11 1486
Manson/Chelan 08:53:13 -35.5 Dark Down 51.0 126.8 Up 08:38:13 - 09:08:13 1472
Wenatchee 08:53:15 -36.0 Dark Down 51.2 126.1 Up 08:38:15 - 09:08:15 1430
Ellensburg 08:53:17 -36.4 Dark Down 51.4 125.4 Up 08:38:17 - 09:08:17 1395
Yakima 08:53:18 -36.8 Dark Down 51.6 125.0 Up 08:38:18 - 09:08:18 1357
Toppenish/White Swan 08:53:18 -37.0 Dark Down 51.8 125.0 Up 08:38:18 - 09:08:18 1334
Goldendale 08:53:21 -37.6 Dark Down 51.9 123.9 Up 08:38:21 - 09:08:21 1288
PNWRO 08:53:12 -37.0 Dark Down 52.9 126.4 Up 08:38:12 - 09:08:12 1278
The Dalles 08:53:24 -37.9 Dark Down 51.8 123.2 Up 08:38:24 - 09:08:24 1272
Maupin 08:53:24 -38.3 Dark Down 52.1 122.9 Up 08:38:24 - 09:08:24 1230
Sisters 08:53:29 -39.2 Dark Down 52.3 121.4 Up 08:38:29 - 09:08:29 1154
Bend 08:53:29 -39.4 Dark Down 52.6 121.4 Up 08:38:29 - 09:08:29 1127
Oregon Observatory 08:53:30 -39.6 Dark Down 52.6 121.1 Up 08:38:30 - 09:08:30 1112
North Lake 08:53:29 -40.1 Dark Down 53.2 121.0 Up 08:38:29 - 09:08:29 1042
Chiloquin 08:53:35 -40.9 Dark Down 53.0 119.1 Up 08:38:35 - 09:08:35 991
Klamath Falls 08:53:36 -41.2 Dark Down 53.2 118.8 Up 08:38:36 - 09:08:36 957
Lakeview 08:53:30 -41.0 Dark Down 54.1 120.4 Up 08:38:30 - 09:08:30 931
Cedarville 08:53:30 -41.5 Dark Down 54.6 119.8 Up 08:38:30 - 09:08:30 864
Fall River/Burney 08:53:37 -42.3 Dark Down 54.0 117.8 Up 08:38:37 - 09:08:37 835
Susanville 08:53:35 -42.7 Dark Down 54.8 117.9 Up 08:38:35 - 09:08:35 761
Greenville 08:53:38 -43.0 Dark Down 54.7 117.2 Up 08:38:38 - 09:08:38 738
Gimple 08:53:37 -43.0 Dark Down 54.8 117.3 Up 08:38:37 - 09:08:37 736
Quincy 08:53:38 -43.2 Dark Down 54.8 117.0 Up 08:38:38 - 09:08:38 718
Portola 08:53:36 -43.2 Dark Down 55.2 117.3 Up 08:38:36 - 09:08:36 698
Reno 08:53:34 -43.3 Dark Down 55.8 117.7 Up 08:38:34 - 09:08:34 661
Carson City 08:53:35 -43.7 Dark Down 56.0 117.3 Up 08:38:35 - 09:08:35 625
Gardnerville 08:53:35 -43.9 Dark Down 56.1 117.0 Up 08:38:35 - 09:08:35 599
Yerington 08:53:32 -43.7 Dark Down 56.5 117.8 Up 08:38:32 - 09:08:32 595
Dunrhomin 08:52:19 -37.5 Dark Down 64.0 139.8 Up 08:37:19 - 09:07:19 552
Hawthorne 08:53:31 -44.0 Dark Down 57.1 117.8 Up 08:38:31 - 09:08:31 540
Lee Vining 08:53:34 -44.6 Dark Down 57.0 116.4 Up 08:38:34 - 09:08:34 491
Tonopah 08:53:25 -44.0 Dark Down 58.2 118.8 Up 08:38:25 - 09:08:25 472
Bishop 08:53:32 -45.0 Dark Down 57.8 116.4 Up 08:38:32 - 09:08:32 418
Beatty 08:53:25 -44.9 Dark Down 59.1 117.7 Up 08:38:25 - 09:08:25 346
Indian Springs 08:53:20 -44.8 Dark Down 60.0 118.5 Up 08:38:20 - 09:08:20 297
Henderson 08:53:18 -45.0 Dark Down 60.7 118.5 Up 08:38:18 - 09:08:18 232
Patrick 08:53:13 -45.2 Dark Down 61.8 119.0 Up 08:38:13 - 09:08:13 151
Laughlin/Bullhead City 08:53:17 -45.7 Dark Down 61.5 117.7 Up 08:38:17 - 09:08:17 135
Kingman/Dolan Springs 08:53:14 -45.4 Dark Down 61.8 118.4 Up 08:38:14 - 09:08:14 131
Mohave Valley 08:53:18 -45.9 Dark Down 61.6 117.2 Up 08:38:18 - 09:08:18 107
Wildwood 08:53:40 -48.0 Dark Down 59.0 111.4 Up 08:38:40 - 09:08:40 84
Lake Havasu City 08:53:17 -46.1 Dark Down 61.9 116.9 Up 08:38:17 - 09:08:17 62
Parker 08:53:18 -46.4 Dark Down 62.1 116.3 Up 08:38:18 - 09:08:18 24
Idyllwild 08:53:31 -47.7 Dark Down 60.5 112.8 Up 08:38:31 - 09:08:31 18
George/Scottsdale 08:53:05 -45.8 Dark Down 64.1 118.7 Up 08:38:05 - 09:08:05 -54
Calipatria 08:53:26 -47.8 Dark Down 61.6 113.2 Up 08:38:26 - 09:08:26 -65
Yuma 08:53:22 -47.8 Dark Down 62.5 113.4 Up 08:38:22 - 09:08:22 -123

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 13RP124, (2026/09/09 08:51UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:35:55.3 +16:30:29  0.8 33.59  74
Hamal          02:07:10.7 +23:27:41  2.0  4.88 106
15 Ari         02:10:37.7 +19:30:01  5.7  1.18 106
PPM 118048     02:13:51.8 +19:36:52  8.1  0.73 106
PPM 118071     02:15:20.0 +18:50:28  9.2  0.12 106
13RP124        02:15:00.4 +18:56:07 15.2       106
Positions are for J2000

Event circumstances last updated at 2022/01/16 23:43:14 UT

Marc W. Buie, Southwest Research Institute

RECON