RECON: TNO occultation with 590218

Event between (590218) 11UD63 and star GA1180:01604942 with event index number of 2685745

Geocentric closest approach at 2027/02/07 06:59:32 UTC

J2000 position of star is 05:35:14.5 +29:10:35
Equinox of date position of star is 05:36:44.9 +29:11:25
Stellar brightness G=15.4, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 119 degrees from the moon. Moon is 0% illuminated.
Apparent brightness V=20.4

[RECON map]
Object is 14.1 AU from the Sun and 13.5 AU from the Earth.
Apparent velocity is 11.1 km/sec on the sky relative to the star, or, 4.1 arcsec/hr.
The 1-sigma error in the time of the event is 200 seconds.
The 1-sigma cross-track error in the shadow position is 1052 km.
The sky-plane scale is 9790.0 km/arcsec.

The object has an absolute magnitude Hv=8.7
Diameter=105.2 km assuming a 5% albedo -- 9.8 sec chord
Diameter=42.9 km assuming a 30% albedo -- 4.0 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 

Star training set for 590218, (2027/02/07 06:59UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:37:28.7 +16:33:42  0.8 18.60 105
Alnath         05:28:00.5 +28:37:40  1.6  2.04 117
PPM 094619     05:41:01.8 +29:13:41  5.9  0.89 120
PPM 094457     05:33:57.6 +29:12:46  8.4  0.66 119
PPM 094558     05:38:18.0 +29:02:03 10.0  0.33 119
PPM 094521     05:37:01.2 +29:17:12 11.0  0.10 119
590218         05:36:58.0 +29:11:32 15.4       120
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 4.5 sigma about the mid-time.
The median site spacing is 38.1 km RECON observability=1.0 and success probability=46.5%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Sleaford 06:53:32 -53.0 Dark Down 46.3 258.7 Up 06:38:32 - 07:08:32 2102
Kamloops 06:54:41 -51.1 Dark Down 55.2 245.9 Up 06:39:41 - 07:09:41 1911
Kelowna 06:54:35 -52.1 Dark Down 55.0 248.0 Up 06:39:35 - 07:09:35 1822
Peachland 06:54:36 -52.1 Dark Down 55.2 247.8 Up 06:39:36 - 07:09:36 1811
Summerland 06:54:36 -52.2 Dark Down 55.2 248.1 Up 06:39:36 - 07:09:36 1794
Penticton 06:54:36 -52.3 Dark Down 55.2 248.3 Up 06:39:36 - 07:09:36 1787
Oliver 06:54:35 -52.6 Dark Down 55.3 248.8 Up 06:39:35 - 07:09:35 1749
Anarchist Mountain Observatory 06:54:34 -52.9 Dark Down 55.2 249.2 Up 06:39:34 - 07:09:34 1730
Victoria 06:54:56 -51.8 Dark Down 57.8 245.4 Up 06:39:56 - 07:09:56 1689
Okanogan 06:54:35 -53.3 Dark Down 55.6 249.9 Up 06:39:35 - 07:09:35 1661
Brewster 06:54:35 -53.5 Dark Down 55.8 250.0 Up 06:39:35 - 07:09:35 1631
Manson/Chelan 06:54:37 -53.5 Dark Down 56.1 249.9 Up 06:39:37 - 07:09:37 1609
Wenatchee 06:54:38 -53.8 Dark Down 56.4 250.4 Up 06:39:38 - 07:09:38 1558
Ellensburg 06:54:39 -54.1 Dark Down 56.7 250.8 Up 06:39:39 - 07:09:39 1514
Yakima 06:54:39 -54.4 Dark Down 56.8 251.4 Up 06:39:39 - 07:09:39 1469
Toppenish/White Swan 06:54:38 -54.7 Dark Down 56.8 251.8 Up 06:39:38 - 07:09:38 1445
PNWRO 06:54:29 -55.5 Dark Down 55.9 253.9 Up 06:39:29 - 07:09:29 1402
The Dalles 06:54:42 -55.0 Dark Down 57.5 252.2 Up 06:39:42 - 07:09:42 1362
Maupin 06:54:41 -55.4 Dark Down 57.6 252.9 Up 06:39:41 - 07:09:41 1316
Sisters 06:54:44 -55.8 Dark Down 58.1 253.8 Up 06:39:44 - 07:09:44 1221
Bend 06:54:42 -56.1 Dark Down 58.0 254.4 Up 06:39:42 - 07:09:42 1194
Oregon Observatory 06:54:42 -56.2 Dark Down 58.2 254.5 Up 06:39:42 - 07:09:42 1176
Chiloquin 06:54:45 -57.0 Dark Down 58.8 256.2 Up 06:39:45 - 07:09:45 1032
Klamath Falls 06:54:44 -57.3 Dark Down 58.8 256.8 Up 06:39:44 - 07:09:44 994
Cedarville 06:54:34 -58.6 Dark Down 57.8 259.4 Up 06:39:34 - 07:09:34 912
Fall River/Burney 06:54:41 -58.4 Dark Down 58.8 259.1 Up 06:39:41 - 07:09:41 863
Dunrhomin 06:53:04 -64.7 Dark Down 46.9 271.7 Up 06:38:04 - 07:08:04 827
Nikitin 06:53:04 -64.8 Dark Down 46.9 271.9 Up 06:38:04 - 07:08:04 807
CU-SBO 06:53:04 -64.9 Dark Down 47.0 271.9 Up 06:38:04 - 07:08:04 799
Greenville 06:54:38 -59.3 Dark Down 58.6 260.9 Up 06:39:38 - 07:09:38 761
Gimple 06:54:38 -59.3 Dark Down 58.6 261.0 Up 06:39:38 - 07:09:38 761
Quincy 06:54:38 -59.4 Dark Down 58.7 261.2 Up 06:39:38 - 07:09:38 739
Portola 06:54:35 -59.8 Dark Down 58.3 261.8 Up 06:39:35 - 07:09:35 723
Reno 06:54:31 -60.3 Dark Down 57.9 262.8 Up 06:39:31 - 07:09:31 692
Carson City 06:54:31 -60.6 Dark Down 57.9 263.3 Up 06:39:31 - 07:09:31 652
Yerington 06:54:27 -61.0 Dark Down 57.4 264.1 Up 06:39:27 - 07:09:27 630
Gardnerville 06:54:31 -60.8 Dark Down 57.9 263.8 Up 06:39:31 - 07:09:31 625
Hawthorne 06:54:23 -61.7 Dark Down 57.1 265.2 Up 06:39:23 - 07:09:23 577
Lee Vining 06:54:27 -61.8 Dark Down 57.5 265.8 Up 06:39:27 - 07:09:27 515
Bishop 06:54:22 -62.7 Dark Down 57.0 267.2 Up 06:39:22 - 07:09:22 448
Beatty 06:54:11 -63.8 Dark Down 55.7 268.9 Up 06:39:11 - 07:09:11 396
Patrick 06:53:52 -66.4 Dark Down 53.4 272.6 Up 06:38:52 - 07:08:52 236
Laughlin/Bullhead City 06:53:57 -66.3 Dark Down 54.0 272.6 Up 06:38:57 - 07:08:57 207
Lake Havasu City 06:53:55 -66.9 Dark Down 53.7 273.6 Up 06:38:55 - 07:08:55 133
Wildwood 06:54:23 -64.9 Dark Down 57.2 272.1 Up 06:39:23 - 07:09:23 85
George/Scottsdale 06:53:39 -68.7 Dark Down 51.7 275.8 Up 06:38:39 - 07:08:39 55
Idyllwild 06:54:11 -66.2 Dark Down 55.6 273.6 Up 06:39:11 - 07:09:11 45
Calipatria 06:54:03 -67.3 Dark Down 54.6 275.0 Up 06:39:03 - 07:09:03 -22
Yuma 06:53:57 -68.1 Dark Down 53.8 275.9 Up 06:38:57 - 07:08:57 -68

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, (2027/02/07 06:59UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:35:55.3 +16:30:29  0.8 18.60 105
Alnath         05:26:17.6 +28:36:23  1.6  2.04 117
PPM 094619     05:39:18.3 +29:12:54  5.9  0.89 120
PPM 094457     05:32:14.1 +29:11:43  8.4  0.66 119
PPM 094558     05:36:34.6 +29:01:09 10.0  0.33 119
PPM 094521     05:35:17.6 +29:16:16 11.0  0.10 119
590218         05:35:14.5 +29:10:35 15.4       119
Positions are for J2000

Event circumstances last updated at 2023/09/03 04:15:12 UT

Marc W. Buie, Southwest Research Institute

RECON