RECON: TNO occultation with 590218

Event between (590218) 11UD63 and star GA1180:01616090 with event index number of 2685740

Geocentric closest approach at 2027/02/01 07:52:40 UTC

J2000 position of star is 05:36:01.0 +29:14:11
Equinox of date position of star is 05:37:25.2 +29:14:56
Stellar brightness G=15.7, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 170 degrees from the moon. Moon is 24% illuminated.
TNO apparent brightness V=20.5

[RECON map]
TNO is 14.1 AU from the Sun and 13.4 AU from the Earth.
The TNO is moving 13.4 km/sec on the sky relative to the star, or, 4.9 arcsec/hr.
The 1-sigma error in the time of the event is 234 seconds.
The 1-sigma cross-track error in the shadow position is 1460 km.
The sky-plane scale is 9740.0 km/arcsec.

The TNO has an absolute magnitude Hv=8.8
Diameter=105.2 km assuming a 5% albedo -- 7.9 sec chord
Diameter=42.9 km assuming a 30% albedo -- 3.2 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 

Star training set for 590218, (2027/02/01 07:53UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:37:28.7 +16:33:42  0.8 18.77 169
Alnath         05:28:00.4 +28:37:40  1.6  2.22 172
PPM 094619     05:41:01.7 +29:13:41  5.9  0.72 169
PPM 094457     05:33:57.5 +29:12:46  8.4  0.83 170
PPM 094565     05:38:41.7 +29:19:41  9.6  0.22 169
PPM 094521     05:37:01.1 +29:17:12 11.0  0.16 170
590218         05:37:44.4 +29:15:06 15.7       169
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 3.8 sigma about the mid-time.
The median site spacing is 32.3 km RECON observability=1.0 and success probability=10.4%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Sleaford 07:47:26 -54.5 Dark Down 41.9 265.2 Up 07:32:26 - 08:02:26 4675
Kamloops 07:48:16 -56.0 Dark Down 50.9 253.8 Up 07:33:16 - 08:03:16 4359
Kelowna 07:48:10 -56.9 Dark Down 50.5 255.6 Up 07:33:10 - 08:03:10 4280
Peachland 07:48:11 -57.0 Dark Down 50.7 255.5 Up 07:33:11 - 08:03:11 4266
Summerland 07:48:10 -57.2 Dark Down 50.7 255.7 Up 07:33:10 - 08:03:10 4251
Penticton 07:48:10 -57.3 Dark Down 50.7 255.9 Up 07:33:10 - 08:03:10 4245
Oliver 07:48:09 -57.6 Dark Down 50.8 256.3 Up 07:33:09 - 08:03:09 4207
Anarchist Mountain Observatory 07:48:08 -57.8 Dark Down 50.7 256.7 Up 07:33:08 - 08:03:08 4191
Tonasket 07:48:08 -58.1 Dark Down 50.8 257.0 Up 07:33:08 - 08:03:08 4157
Okanogan 07:48:07 -58.4 Dark Down 51.0 257.3 Up 07:33:07 - 08:03:07 4120
Victoria 07:48:25 -57.6 Dark Down 53.3 253.5 Up 07:33:25 - 08:03:25 4111
Brewster 07:48:08 -58.6 Dark Down 51.2 257.4 Up 07:33:08 - 08:03:08 4090
Manson/Chelan 07:48:09 -58.8 Dark Down 51.4 257.3 Up 07:33:09 - 08:03:09 4064
Wenatchee 07:48:10 -59.2 Dark Down 51.7 257.8 Up 07:33:10 - 08:03:10 4012
Ellensburg 07:48:09 -59.6 Dark Down 51.9 258.1 Up 07:33:09 - 08:03:09 3966
Yakima 07:48:09 -60.0 Dark Down 52.0 258.6 Up 07:33:09 - 08:03:09 3922
Toppenish/White Swan 07:48:08 -60.2 Dark Down 51.9 259.0 Up 07:33:08 - 08:03:08 3900
PNWRO 07:48:00 -60.8 Dark Down 51.0 260.7 Up 07:33:00 - 08:03:00 3873
Goldendale 07:48:09 -60.7 Dark Down 52.3 259.3 Up 07:33:09 - 08:03:09 3837
The Dalles 07:48:10 -60.9 Dark Down 52.6 259.3 Up 07:33:10 - 08:03:10 3810
Maupin 07:48:10 -61.3 Dark Down 52.6 259.9 Up 07:33:10 - 08:03:10 3766
Sisters 07:48:10 -62.0 Dark Down 53.1 260.6 Up 07:33:10 - 08:03:10 3667
Bend 07:48:08 -62.3 Dark Down 53.0 261.1 Up 07:33:08 - 08:03:08 3643
Oregon Observatory 07:48:08 -62.5 Dark Down 53.1 261.3 Up 07:33:08 - 08:03:08 3623
North Lake 07:48:05 -63.2 Dark Down 52.8 262.5 Up 07:33:05 - 08:03:05 3558
Chiloquin 07:48:08 -63.6 Dark Down 53.6 262.7 Up 07:33:08 - 08:03:08 3476
Dunrhomin 07:46:49 -65.8 Dark Down 41.3 276.2 Up 07:31:49 - 08:01:49 3456
Lakeview 07:48:01 -64.3 Dark Down 52.5 264.3 Up 07:33:01 - 08:03:01 3447
Klamath Falls 07:48:08 -64.0 Dark Down 53.5 263.2 Up 07:33:08 - 08:03:08 3440
Cedarville 07:47:59 -65.0 Dark Down 52.4 265.3 Up 07:32:59 - 08:02:59 3376
Fall River/Burney 07:48:05 -65.2 Dark Down 53.4 265.1 Up 07:33:05 - 08:03:05 3313
Susanville 07:48:00 -65.9 Dark Down 52.9 266.4 Up 07:33:00 - 08:03:00 3250
Gimple 07:48:00 -66.2 Dark Down 53.1 266.6 Up 07:33:00 - 08:03:00 3218
Greenville 07:48:00 -66.1 Dark Down 53.1 266.6 Up 07:33:00 - 08:03:00 3218
Quincy 07:48:01 -66.3 Dark Down 53.1 266.9 Up 07:33:01 - 08:03:01 3195
Portola 07:47:58 -66.6 Dark Down 52.8 267.4 Up 07:32:58 - 08:02:58 3186
Reno 07:47:55 -66.9 Dark Down 52.3 268.1 Up 07:32:55 - 08:02:55 3162
Carson City 07:47:53 -67.3 Dark Down 52.3 268.6 Up 07:32:53 - 08:02:53 3123
Yerington 07:47:50 -67.6 Dark Down 51.8 269.3 Up 07:32:50 - 08:02:50 3108
Gardnerville 07:47:54 -67.5 Dark Down 52.3 269.0 Up 07:32:54 - 08:02:54 3097
Hawthorne 07:47:47 -68.2 Dark Down 51.4 270.2 Up 07:32:47 - 08:02:47 3062
Tonopah 07:47:39 -68.8 Dark Down 50.3 271.6 Up 07:32:39 - 08:02:39 3026
Lee Vining 07:47:50 -68.6 Dark Down 51.8 270.6 Up 07:32:50 - 08:02:50 2995
Bishop 07:47:45 -69.3 Dark Down 51.2 271.8 Up 07:32:45 - 08:02:45 2937
Beatty 07:47:36 -70.0 Dark Down 49.9 273.2 Up 07:32:36 - 08:02:36 2905
Indian Springs 07:47:30 -70.5 Dark Down 49.1 274.2 Up 07:32:30 - 08:02:30 2882
Henderson 07:47:26 -71.0 Dark Down 48.5 275.1 Up 07:32:26 - 08:02:26 2833
Patrick 07:47:20 -71.7 Dark Down 47.5 276.4 Up 07:32:20 - 08:02:20 2780
Kingman/Dolan Springs 07:47:20 -71.9 Dark Down 47.7 276.5 Up 07:32:20 - 08:02:20 2753
Laughlin/Bullhead City 07:47:23 -71.9 Dark Down 48.1 276.3 Up 07:32:23 - 08:02:23 2743
Mohave Valley 07:47:23 -72.2 Dark Down 48.0 276.6 Up 07:32:23 - 08:02:23 2713
Lake Havasu City 07:47:21 -72.6 Dark Down 47.8 277.2 Up 07:32:21 - 08:02:21 2673
Parker 07:47:21 -73.0 Dark Down 47.7 277.5 Up 07:32:21 - 08:02:21 2635
George/Scottsdale 07:47:08 -73.4 Dark Down 45.7 279.0 Up 07:32:08 - 08:02:08 2626
Wildwood 07:47:43 -72.4 Dark Down 51.2 275.7 Up 07:32:43 - 08:02:43 2575
Idyllwild 07:47:32 -73.2 Dark Down 49.6 277.0 Up 07:32:32 - 08:02:32 2557
Calipatria 07:47:25 -73.9 Dark Down 48.6 278.2 Up 07:32:25 - 08:02:25 2506
Yuma 07:47:20 -74.4 Dark Down 47.8 279.0 Up 07:32:20 - 08:02:20 2471

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 590218, (2027/02/01 07:53UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:35:55.3 +16:30:29  0.8 18.77 169
Alnath         05:26:17.6 +28:36:23  1.6  2.22 172
PPM 094619     05:39:18.3 +29:12:54  5.9  0.72 169
PPM 094457     05:32:14.1 +29:11:43  8.4  0.83 170
PPM 094565     05:36:58.2 +29:18:49  9.6  0.22 169
PPM 094521     05:35:17.6 +29:16:16 11.0  0.16 170
590218         05:36:01.0 +29:14:11 15.7       170
Positions are for J2000

Event circumstances last updated at 2022/01/21 23:49:10 UT

Marc W. Buie, Southwest Research Institute

RECON