RECON: TNO occultation with 15KH162

Event between 15KH162 and star GA0880:04699561 with event index number of 1956213

Geocentric closest approach at 2025/05/28 08:18:54 UTC

J2000 position of star is 16:12:26.0 -00:48:43
Equinox of date position of star is 16:13:35.0 -00:52:04
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=21.9

[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 142 seconds.
The 1-sigma cross-track error in the shadow position is 2554 km.
The sky-plane scale is 43962.3 km/arcsec.

The TNO has an absolute magnitude Hv=4.0
Diameter=941.9 km assuming a 5% albedo -- 36.4 sec chord
Diameter=384.5 km assuming a 30% albedo -- 14.9 sec chord
Dynamical classification is SCATNEAR
 
 
 
 
 
 

Star training set for 15KH162, (2025/05/28 08:20UT)
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 5.0 sigma about the mid-time.
The median site spacing is 21.6 km RECON observability=1.0 and success probability=8.4%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Sleaford 08:18:40 -14.5 AT Down 34.0 206.6 Up 08:06:18 - 08:31:01 -2790
Kamloops 08:19:14 -17.7 AT Down 38.1 189.5 Up 08:06:53 - 08:31:36 -3072
Kelowna 08:19:11 -18.4 Dark Down 38.8 190.7 Up 08:06:49 - 08:31:32 -3113
Peachland 08:19:11 -18.5 Dark Down 39.0 190.4 Up 08:06:50 - 08:31:33 -3124
Summerland 08:19:11 -18.7 Dark Down 39.1 190.5 Up 08:06:50 - 08:31:33 -3133
Penticton 08:19:11 -18.7 Dark Down 39.2 190.7 Up 08:06:49 - 08:31:32 -3136
Oliver 08:19:10 -19.1 Dark Down 39.5 190.7 Up 08:06:49 - 08:31:32 -3160
Anarchist Mountain Observatory 08:19:10 -19.3 Dark Down 39.6 191.0 Up 08:06:48 - 08:31:31 -3168
Tonasket 08:19:10 -19.6 Dark Down 40.0 191.0 Up 08:06:49 - 08:31:32 -3190
Okanogan 08:19:10 -19.9 Dark Down 40.3 190.8 Up 08:06:49 - 08:31:32 -3216
Brewster 08:19:10 -20.2 Dark Down 40.6 190.6 Up 08:06:49 - 08:31:32 -3238
Manson/Chelan 08:19:11 -20.4 Dark Down 40.8 190.2 Up 08:06:50 - 08:31:33 -3257
Victoria 08:19:20 -19.9 Dark Down 40.5 185.8 Up 08:06:59 - 08:31:42 -3262
Wenatchee 08:19:11 -20.9 Dark Down 41.3 190.0 Up 08:06:49 - 08:31:32 -3293
Ellensburg 08:19:11 -21.3 Dark Down 41.8 189.8 Up 08:06:50 - 08:31:33 -3326
Yakima 08:19:11 -21.7 Dark Down 42.2 189.8 Up 08:06:49 - 08:31:32 -3355
Toppenish/White Swan 08:19:10 -21.9 Dark Down 42.4 190.1 Up 08:06:49 - 08:31:32 -3368
PNWRO 08:19:05 -22.2 Dark Down 42.5 192.1 Up 08:06:44 - 08:31:27 -3371
Goldendale 08:19:11 -22.5 Dark Down 43.0 189.6 Up 08:06:49 - 08:31:32 -3414
The Dalles 08:19:11 -22.8 Dark Down 43.2 189.1 Up 08:06:50 - 08:31:33 -3437
Maupin 08:19:11 -23.2 Dark Down 43.6 189.3 Up 08:06:50 - 08:31:33 -3466
Sisters 08:19:11 -24.1 Dark Down 44.5 188.8 Up 08:06:49 - 08:31:32 -3539
Bend 08:19:10 -24.3 Dark Down 44.8 189.2 Up 08:06:49 - 08:31:32 -3552
Oregon Observatory 08:19:10 -24.5 Dark Down 44.9 189.0 Up 08:06:49 - 08:31:32 -3567
Dunrhomin 08:18:17 -25.5 Dark Down 44.1 212.1 Up 08:05:56 - 08:30:39 -3584
CU-SBO 08:18:18 -25.7 Dark Down 44.4 212.1 Up 08:05:56 - 08:30:39 -3605
North Lake 08:19:09 -25.1 Dark Down 45.5 189.9 Up 08:06:48 - 08:31:31 -3607
Chiloquin 08:19:11 -25.8 Dark Down 46.3 188.6 Up 08:06:50 - 08:31:33 -3675
Lakeview 08:19:06 -26.1 Dark Down 46.5 190.8 Up 08:06:44 - 08:31:27 -3680
Klamath Falls 08:19:09 -26.2 Dark Down 46.6 188.8 Up 08:06:48 - 08:31:31 -3700
Cedarville 08:19:05 -26.8 Dark Down 47.1 191.2 Up 08:06:44 - 08:31:27 -3728
Fall River/Burney 08:19:08 -27.3 Dark Down 47.7 189.6 Up 08:06:46 - 08:31:29 -3787
Susanville 08:19:06 -27.9 Dark Down 48.3 190.8 Up 08:06:44 - 08:31:27 -3824
Gimple 08:19:05 -28.2 Dark Down 48.6 190.5 Up 08:06:43 - 08:31:26 -3850
Greenville 08:19:06 -28.2 Dark Down 48.6 190.4 Up 08:06:44 - 08:31:27 -3852
Quincy 08:19:06 -28.4 Dark Down 48.8 190.4 Up 08:06:44 - 08:31:27 -3868
Portola 08:19:04 -28.5 Dark Down 48.8 191.2 Up 08:06:42 - 08:31:25 -3870
Reno 08:19:02 -28.7 Dark Down 49.0 192.2 Up 08:06:41 - 08:31:24 -3880
Carson City 08:19:02 -29.1 Dark Down 49.3 192.3 Up 08:06:40 - 08:31:23 -3909
Yerington 08:18:59 -29.2 Dark Down 49.4 193.3 Up 08:06:38 - 08:31:21 -3914
Gardnerville 08:19:01 -29.3 Dark Down 49.6 192.4 Up 08:06:39 - 08:31:22 -3928
Hawthorne 08:18:57 -29.6 Dark Down 49.8 194.2 Up 08:06:36 - 08:31:19 -3943
Tonopah 08:18:52 -29.9 Dark Down 49.9 196.5 Up 08:06:30 - 08:31:13 -3956
Lee Vining 08:18:57 -30.2 Dark Down 50.4 193.6 Up 08:06:35 - 08:31:18 -3997
Bishop 08:18:55 -30.7 Dark Down 50.9 194.9 Up 08:06:33 - 08:31:16 -4035
Beatty 08:18:49 -31.0 Dark Down 50.9 197.6 Up 08:06:28 - 08:31:11 -4045
Indian Springs 08:18:45 -31.2 Dark Down 51.0 199.3 Up 08:06:24 - 08:31:07 -4053
Henderson 08:18:42 -31.6 Dark Down 51.3 200.6 Up 08:06:21 - 08:31:04 -4086
Patrick 08:18:38 -32.0 Dark Down 51.5 202.6 Up 08:06:16 - 08:30:59 -4119
Kingman/Dolan Springs 08:18:38 -32.3 Dark Down 51.8 202.4 Up 08:06:17 - 08:31:00 -4141
Laughlin/Bullhead City 08:18:40 -32.4 Dark Down 52.0 201.6 Up 08:06:19 - 08:31:02 -4153
Mohave Valley 08:18:40 -32.7 Dark Down 52.2 201.8 Up 08:06:18 - 08:31:01 -4176
Lake Havasu City 08:18:38 -33.0 Dark Down 52.5 202.3 Up 08:06:17 - 08:31:00 -4206
George/Scottsdale 08:18:29 -33.3 Dark Down 52.4 206.5 Up 08:06:07 - 08:30:50 -4229
Parker 08:18:38 -33.4 Dark Down 52.9 202.6 Up 08:06:16 - 08:30:59 -4236
Idyllwild 08:18:45 -34.1 Dark Down 53.9 198.9 Up 08:06:24 - 08:31:07 -4314
Wildwood 08:18:52 -34.0 Dark Down 54.1 195.7 Up 08:06:31 - 08:31:14 -4317
Calipatria 08:18:39 -34.6 Dark Down 54.2 201.1 Up 08:06:18 - 08:31:01 -4346
Yuma 08:18:37 -34.8 Dark Down 54.3 202.8 Up 08:06:16 - 08:30:59 -4368

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 08:20UT)
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     16:13:11.1 -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 2022/04/18 23:14:24 UT

Marc W. Buie, Southwest Research Institute

RECON