RECON: TNO occultation with 15KH162

Event between 15KH162 and star GA0880:04699561 with event index number of 1399732

Geocentric closest approach at 2025/05/28 08:19:18 UTC

J2000 position of star is 16:12:26.0 -00:48:43
Equinox of date position of star is 16:13:31.5 -00:51:54
Stellar brightness G=14.2, use SENSEUP=64 with the MallinCam and and exposure time of 1 seconds with the QHY174 camera.
Star is 146 degrees from the moon. Moon is 2% illuminated.
TNO apparent brightness V=22.0

[RECON map]
TNO is 61.6 AU from the Sun and 60.6 AU from the Earth.
The TNO is moving 26.0 km/sec on the sky relative to the star, or, 2.1 arcsec/hr.
The 1-sigma error in the time of the event is 227 seconds.
The 1-sigma cross-track error in the shadow position is 3091 km.
The sky-plane scale is 43962.3 km/arcsec.

The TNO has an absolute magnitude Hv=4.1
Diameter=924.7 km assuming a 5% albedo -- 35.6 sec chord
Diameter=377.5 km assuming a 30% albedo -- 14.5 sec chord
Dynamical classification is SCATNEAR
 
 
 
 
 
 

Star training set for 15KH162, (2025/05/28 08:19UT)
Object            RA         Dec     mag  sep  mel
Antares        16:30:58.2 -26:29:10  0.9 25.94 165
1Del Oph       16:15:40.8 -03:45:28  2.7  2.92 149
PPM 199363     16:11:10.4 -03:31:54  5.0  2.73 148
PPM 179746     16:14:29.6 -00:34:57  8.2  0.35 146
PPM 179736     16:12:56.2 -00:53:53  9.9  0.20 146
PPM 179745     16:14:17.9 -00:57:09 10.3  0.16 146
15KH162        16:13:44.6 -00:52:32 14.2       146
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 4.0 sigma about the mid-time.
The median site spacing is 21.6 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)
Clarence Fulton 08:19:36 -18.0 Dark Down 38.4 191.0 Up 08:04:36 - 08:34:36 -1177
Kelowna 08:19:36 -18.4 Dark Down 38.8 190.9 Up 08:04:36 - 08:34:36 -1205
Peachland 08:19:37 -18.5 Dark Down 39.0 190.5 Up 08:04:37 - 08:34:37 -1216
Summerland 08:19:36 -18.7 Dark Down 39.1 190.7 Up 08:04:36 - 08:34:36 -1225
Penticton 08:19:36 -18.7 Dark Down 39.1 190.8 Up 08:04:36 - 08:34:36 -1228
Oliver 08:19:35 -19.1 Dark Down 39.5 190.9 Up 08:04:35 - 08:34:35 -1251
Anarchist Mountain Observatory 08:19:34 -19.3 Dark Down 39.6 191.1 Up 08:04:34 - 08:34:34 -1260
Tonasket 08:19:34 -19.6 Dark Down 39.9 191.1 Up 08:04:34 - 08:34:34 -1282
Okanogan 08:19:34 -19.9 Dark Down 40.3 190.9 Up 08:04:34 - 08:34:34 -1308
Brewster 08:19:35 -20.2 Dark Down 40.6 190.7 Up 08:04:35 - 08:34:35 -1329
Manson/Chelan 08:19:36 -20.4 Dark Down 40.8 190.3 Up 08:04:36 - 08:34:36 -1349
Victoria 08:19:46 -19.9 Dark Down 40.5 186.0 Up 08:04:46 - 08:34:46 -1354
Wenatchee 08:19:36 -20.9 Dark Down 41.3 190.1 Up 08:04:36 - 08:34:36 -1385
Ellensburg 08:19:36 -21.3 Dark Down 41.8 189.9 Up 08:04:36 - 08:34:36 -1417
Yakima 08:19:36 -21.7 Dark Down 42.2 189.9 Up 08:04:36 - 08:34:36 -1447
Pasco 08:19:31 -22.0 Dark Down 42.3 191.9 Up 08:04:31 - 08:34:31 -1449
Toppenish/White Swan 08:19:35 -21.9 Dark Down 42.4 190.2 Up 08:04:35 - 08:34:35 -1460
PNWRO 08:19:30 -22.2 Dark Down 42.5 192.3 Up 08:04:30 - 08:34:30 -1463
Goldendale 08:19:36 -22.5 Dark Down 42.9 189.7 Up 08:04:36 - 08:34:36 -1506
The Dalles 08:19:36 -22.8 Dark Down 43.2 189.3 Up 08:04:36 - 08:34:36 -1529
Maupin 08:19:36 -23.2 Dark Down 43.6 189.5 Up 08:04:36 - 08:34:36 -1558
Redmond 08:19:35 -24.1 Dark Down 44.5 189.5 Up 08:04:35 - 08:34:35 -1626
Sisters 08:19:36 -24.1 Dark Down 44.5 188.9 Up 08:04:36 - 08:34:36 -1630
Bend 08:19:35 -24.3 Dark Down 44.7 189.3 Up 08:04:35 - 08:34:35 -1644
Oregon Observatory 08:19:36 -24.5 Dark Down 44.9 189.2 Up 08:04:36 - 08:34:36 -1659
La Pine/Gilchrist 08:19:36 -24.7 Dark Down 45.1 189.1 Up 08:04:36 - 08:34:36 -1676
Dunrhomin 08:18:42 -25.4 Dark Down 44.1 212.2 Up 08:03:42 - 08:33:42 -1676
North Lake 08:19:33 -25.1 Dark Down 45.5 190.0 Up 08:04:33 - 08:34:33 -1699
Paisley 08:19:32 -25.6 Dark Down 46.0 190.6 Up 08:04:32 - 08:34:32 -1735
Chiloquin 08:19:36 -25.8 Dark Down 46.3 188.8 Up 08:04:36 - 08:34:36 -1767
Lakeview 08:19:31 -26.1 Dark Down 46.5 191.0 Up 08:04:31 - 08:34:31 -1771
Klamath Falls 08:19:35 -26.2 Dark Down 46.6 189.0 Up 08:04:35 - 08:34:35 -1792
Cedarville 08:19:30 -26.8 Dark Down 47.1 191.4 Up 08:04:30 - 08:34:30 -1820
Fall River/Burney 08:19:33 -27.3 Dark Down 47.7 189.7 Up 08:04:33 - 08:34:33 -1878
Susanville 08:19:30 -27.9 Dark Down 48.2 190.9 Up 08:04:30 - 08:34:30 -1916
Gimple 08:19:30 -28.2 Dark Down 48.6 190.7 Up 08:04:30 - 08:34:30 -1942
Greenville 08:19:30 -28.2 Dark Down 48.6 190.5 Up 08:04:30 - 08:34:30 -1943
Quincy 08:19:30 -28.4 Dark Down 48.8 190.6 Up 08:04:30 - 08:34:30 -1960
Portola 08:19:29 -28.5 Dark Down 48.8 191.3 Up 08:04:29 - 08:34:29 -1961
Reno 08:19:27 -28.7 Dark Down 49.0 192.3 Up 08:04:27 - 08:34:27 -1972
Carson City 08:19:26 -29.1 Dark Down 49.3 192.5 Up 08:04:26 - 08:34:26 -2000
Yerington 08:19:24 -29.2 Dark Down 49.4 193.5 Up 08:04:24 - 08:34:24 -2005
Gardnerville 08:19:26 -29.3 Dark Down 49.6 192.6 Up 08:04:26 - 08:34:26 -2020
Hawthorne 08:19:22 -29.6 Dark Down 49.8 194.4 Up 08:04:22 - 08:34:22 -2034
Tonopah 08:19:17 -29.9 Dark Down 49.9 196.6 Up 08:04:17 - 08:34:17 -2048
Lee Vining 08:19:23 -30.2 Dark Down 50.4 193.8 Up 08:04:23 - 08:34:23 -2089
Bishop 08:19:19 -30.7 Dark Down 50.8 195.1 Up 08:04:19 - 08:34:19 -2126
Beatty 08:19:14 -31.0 Dark Down 50.9 197.7 Up 08:04:14 - 08:34:14 -2136
Indian Springs 08:19:10 -31.2 Dark Down 51.0 199.5 Up 08:04:10 - 08:34:10 -2145
Henderson 08:19:07 -31.6 Dark Down 51.3 200.8 Up 08:04:07 - 08:34:07 -2178
Patrick 08:19:02 -32.0 Dark Down 51.5 202.7 Up 08:04:02 - 08:34:02 -2211
Kingman/Dolan Springs 08:19:03 -32.3 Dark Down 51.8 202.6 Up 08:04:03 - 08:34:03 -2233
Laughlin/Bullhead City 08:19:04 -32.4 Dark Down 52.0 201.8 Up 08:04:04 - 08:34:04 -2244
Mohave Valley 08:19:04 -32.6 Dark Down 52.2 201.9 Up 08:04:04 - 08:34:04 -2268
Lake Havasu City 08:19:03 -33.0 Dark Down 52.5 202.5 Up 08:04:03 - 08:34:03 -2297
George/Scottsdale 08:18:54 -33.3 Dark Down 52.4 206.7 Up 08:03:54 - 08:33:54 -2320
Parker 08:19:03 -33.3 Dark Down 52.8 202.7 Up 08:04:03 - 08:34:03 -2327
CPSLO 08:19:26 -33.0 Dark Down 53.3 192.1 Up 08:04:26 - 08:34:26 -2342
Blythe 08:19:03 -33.9 Dark Down 53.4 202.5 Up 08:04:03 - 08:34:03 -2378
Idyllwild 08:19:10 -34.1 Dark Down 53.9 199.1 Up 08:04:10 - 08:34:10 -2405
Wildwood 08:19:17 -34.0 Dark Down 54.0 195.9 Up 08:04:17 - 08:34:17 -2409
Calipatria 08:19:05 -34.5 Dark Down 54.1 201.3 Up 08:04:05 - 08:34:05 -2438
Yuma 08:19:02 -34.8 Dark Down 54.3 202.9 Up 08:04:02 - 08:34:02 -2459

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 15KH162, (2025/05/28 08:19UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9 25.94 165
1Del Oph       16:14:20.7 -03:41:43  2.7  2.92 149
PPM 199363     16:09:50.5 -03:28:00  5.0  2.73 148
PPM 179746     16:13:11.2 -00:31:09  8.2  0.35 146
PPM 179736     16:11:37.7 -00:50:02  9.9  0.20 146
PPM 179745     16:12:59.3 -00:53:21 10.3  0.16 146
15KH162        16:12:26.0 -00:48:43 14.2       146
Positions are for J2000

Event circumstances last updated at 2021/03/07 01:03:52 UT

Marc W. Buie, Southwest Research Institute

RECON