RECON: TNO occultation with 14LO28

Event between 14LO28 and star GA1000:19321216 with event index number of 1481050

Geocentric closest approach at 2025/08/30 06:43:26 UTC

J2000 position of star is 22:09:06.8 +11:06:49
Equinox of date position of star is 22:10:04.7 +11:12:37
Stellar brightness G=13.6, use SENSEUP=64
Star is 103 degrees from the moon. Moon is 41% illuminated.
TNO apparent brightness V=21.5

[RECON map]
TNO is 39.5 AU from the Sun and 38.6 AU from the Earth.
The TNO is moving 24.8 km/sec on the sky relative to the star, or, 3.2 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 5261 km.
The sky-plane scale is 27986.5 km/arcsec.

The TNO has an absolute magnitude Hv=5.5
Diameter=478.6 km assuming a 5% albedo -- 19.2 sec chord
Diameter=195.4 km assuming a 30% albedo -- 7.8 sec chord
Dynamical classification is SCATEXTD
 
 
 
 
 
 

Star training set for 14LO28, (2025/08/30 06:43UT)
Object            RA         Dec     mag  sep  mel
Deneb          20:42:18.5 +45:22:23  1.3 38.97  99
Markab         23:06:02.5 +15:20:38  2.5 14.15 117
21 Peg         22:04:34.6 +11:30:41  5.8  1.45 102
PPM 141087     22:08:55.4 +10:52:47  8.1  0.51 103
PPM 141103     22:09:48.0 +11:15:50 10.9  0.14 103
14LO28         22:10:22.6 +11:14:25 13.6       103
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 18.3 km RECON observability=1.0 and success probability=8.5%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Kelowna 06:43:08 -29.0 Dark Down 49.9 161.3 Up 06:28:08 - 06:58:08 -643
Summerland 06:43:09 -29.2 Dark Down 50.2 160.7 Up 06:28:09 - 06:58:09 -658
Penticton 06:43:09 -29.3 Dark Down 50.2 160.9 Up 06:28:09 - 06:58:09 -666
Okanagan Falls 06:43:09 -29.5 Dark Down 50.4 160.8 Up 06:28:09 - 06:58:09 -680
Oliver 06:43:10 -29.6 Dark Down 50.6 160.7 Up 06:28:10 - 06:58:10 -693
Anarchist Mountain Observatory 06:43:09 -29.8 Dark Down 50.8 161.0 Up 06:28:09 - 06:58:09 -711
Oroville 06:43:10 -29.9 Dark Down 50.8 160.8 Up 06:28:10 - 06:58:10 -715
Tonasket 06:43:10 -30.1 Dark Down 51.1 160.7 Up 06:28:10 - 06:58:10 -733
Okanogan 06:43:11 -30.4 Dark Down 51.3 160.4 Up 06:28:11 - 06:58:11 -756
Brewster 06:43:12 -30.6 Dark Down 51.6 159.9 Up 06:28:12 - 06:58:12 -772
Manson/Chelan 06:43:12 -30.7 Dark Down 51.7 159.3 Up 06:28:12 - 06:58:12 -779
Wenatchee 06:43:12 -31.1 Dark Down 52.1 158.8 Up 06:28:12 - 06:58:12 -814
Ellensburg 06:43:12 -31.4 Dark Down 52.4 158.3 Up 06:28:12 - 06:58:12 -844
Yakima 06:43:12 -31.7 Dark Down 52.8 158.0 Up 06:28:12 - 06:58:12 -878
Toppenish/White Swan 06:43:12 -32.0 Dark Down 53.0 158.2 Up 06:28:12 - 06:58:12 -900
Goldendale 06:43:19 -32.4 Dark Down 53.4 157.3 Up 06:28:19 - 06:58:19 -924
The Dalles 06:43:21 -32.5 Dark Down 53.5 156.6 Up 06:28:21 - 06:58:21 -932
Pasco 06:43:12 -32.4 Dark Down 53.4 160.2 Up 06:28:12 - 06:58:12 -936
PNWRO 06:43:12 -32.7 Dark Down 53.7 160.4 Up 06:28:12 - 06:58:12 -962
Maupin 06:43:21 -32.9 Dark Down 53.9 156.6 Up 06:28:21 - 06:58:21 -969
Madras/Culver 06:43:22 -33.4 Dark Down 54.4 156.2 Up 06:28:22 - 06:58:22 -1012
Sisters 06:43:24 -33.6 Dark Down 54.6 155.3 Up 06:28:24 - 06:58:24 -1026
Redmond 06:43:23 -33.7 Dark Down 54.7 155.9 Up 06:28:23 - 06:58:23 -1040
Bend 06:43:24 -33.9 Dark Down 54.9 155.6 Up 06:28:24 - 06:58:24 -1053
Oregon Observatory 06:43:25 -34.0 Dark Down 55.0 155.3 Up 06:28:25 - 06:58:25 -1064
La Pine/Gilchrist 06:43:25 -34.1 Dark Down 55.2 155.0 Up 06:28:25 - 06:58:25 -1079
North Lake 06:43:24 -34.7 Dark Down 55.8 155.8 Up 06:28:24 - 06:58:24 -1132
Chiloquin 06:43:29 -35.0 Dark Down 56.1 153.8 Up 06:28:29 - 06:58:29 -1161
Paisley 06:43:24 -35.3 Dark Down 56.4 156.0 Up 06:28:24 - 06:58:24 -1189
Klamath Falls 06:43:28 -35.4 Dark Down 56.4 153.7 Up 06:28:28 - 06:58:28 -1192
Tulelake 06:43:28 -35.7 Dark Down 56.8 154.0 Up 06:28:28 - 06:58:28 -1223
Lakeview 06:43:25 -35.9 Dark Down 56.9 156.0 Up 06:28:25 - 06:58:25 -1237
Cedarville 06:43:25 -36.5 Dark Down 57.6 155.9 Up 06:28:25 - 06:58:25 -1298
Fall River/Burney 06:43:30 -36.6 Dark Down 57.6 153.5 Up 06:28:30 - 06:58:30 -1303
Susanville 06:43:29 -37.4 Dark Down 58.4 154.4 Up 06:28:29 - 06:58:29 -1379
Greenville 06:43:30 -37.5 Dark Down 58.6 153.7 Up 06:28:30 - 06:58:30 -1394
Gimple 06:43:30 -37.6 Dark Down 58.6 153.8 Up 06:28:30 - 06:58:30 -1397
Quincy 06:43:30 -37.7 Dark Down 58.8 153.5 Up 06:28:30 - 06:58:30 -1412
Portola 06:43:29 -38.0 Dark Down 59.0 154.3 Up 06:28:29 - 06:58:29 -1437
Reno 06:43:27 -38.4 Dark Down 59.5 155.2 Up 06:28:27 - 06:58:27 -1480
Carson City 06:43:29 -38.8 Dark Down 59.8 155.0 Up 06:28:29 - 06:58:29 -1512
Gardnerville 06:43:29 -39.0 Dark Down 60.0 154.9 Up 06:28:29 - 06:58:29 -1535
Yerington 06:43:27 -39.1 Dark Down 60.2 156.1 Up 06:28:27 - 06:58:27 -1548
Hawthorne 06:43:26 -39.7 Dark Down 60.8 156.7 Up 06:28:26 - 06:58:26 -1605
Lee Vining 06:43:29 -40.1 Dark Down 61.1 155.4 Up 06:28:29 - 06:58:29 -1641
Tonopah 06:43:22 -40.6 Dark Down 61.6 159.1 Up 06:28:22 - 06:58:22 -1690
Bishop 06:43:27 -40.9 Dark Down 61.9 156.4 Up 06:28:27 - 06:58:27 -1717
Lone Pine 06:43:27 -41.7 Dark Down 62.7 156.4 Up 06:28:27 - 06:58:27 -1796
Beatty 06:43:23 -41.8 Dark Down 62.8 159.3 Up 06:28:23 - 06:58:23 -1809
CPSLO 06:43:38 -42.0 Dark Down 63.0 150.2 Up 06:28:38 - 06:58:38 -1832
SwRI 06:42:41 -40.9 Dark Down 61.1 183.7 Up 06:27:41 - 06:57:41 -1853
Indian Springs 06:43:19 -42.4 Dark Down 63.4 161.3 Up 06:28:19 - 06:58:19 -1872
Henderson 06:43:18 -43.1 Dark Down 64.1 162.4 Up 06:28:18 - 06:58:18 -1942
Searchlight/Boulder City 06:43:19 -43.7 Dark Down 64.7 162.2 Up 06:28:19 - 06:58:19 -1997
Wildwood 06:43:34 -43.8 Dark Down 64.8 153.2 Up 06:28:34 - 06:58:34 -2009
Laughlin/Bullhead City 06:43:19 -44.0 Dark Down 65.0 162.8 Up 06:28:19 - 06:58:19 -2036
Patrick 06:43:12 -44.0 Dark Down 65.0 164.5 Up 06:28:12 - 06:58:12 -2036
Kingman/Dolan Springs 06:43:12 -44.1 Dark Down 65.1 163.9 Up 06:28:12 - 06:58:12 -2053
Mohave Valley 06:43:18 -44.3 Dark Down 65.3 162.6 Up 06:28:18 - 06:58:18 -2061
Idyllwild 06:43:28 -44.8 Dark Down 65.8 157.0 Up 06:28:28 - 06:58:28 -2103
Lake Havasu City 06:43:18 -44.7 Dark Down 65.8 162.9 Up 06:28:18 - 06:58:18 -2107
Parker 06:43:19 -45.1 Dark Down 66.1 162.8 Up 06:28:19 - 06:58:19 -2141
Blythe 06:43:21 -45.5 Dark Down 66.5 161.7 Up 06:28:21 - 06:58:21 -2181
Calipatria 06:43:25 -45.7 Dark Down 66.7 159.2 Up 06:28:25 - 06:58:25 -2198
George/Scottsdale 06:43:11 -46.1 Dark Down 67.0 168.3 Up 06:28:11 - 06:58:11 -2257
Yuma 06:43:22 -46.4 Dark Down 67.4 161.0 Up 06:28:22 - 06:58:22 -2268

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 14LO28, (2025/08/30 06:43UT)
Object            RA         Dec     mag  sep  mel
Deneb          20:41:25.9 +45:16:49  1.3 38.97  99
Markab         23:04:45.8 +15:12:18  2.5 14.15 117
21 Peg         22:03:19.0 +11:23:11  5.8  1.45 102
PPM 141087     22:07:39.6 +10:45:13  8.1  0.51 103
PPM 141103     22:08:32.2 +11:08:14 10.9  0.14 103
14LO28         22:09:06.8 +11:06:49 13.6       103
Positions are for J2000

Event circumstances last updated at 2019/08/05 23:45:52 UT

Marc W. Buie, Southwest Research Institute

RECON