RECON: TNO occultation with 601690

Event between (601690) 13KZ18 and star GA1360:00490304 with event index number of 2733348

Geocentric closest approach at 2027/12/31 05:18:20 UTC

J2000 position of star is 01:10:04.3 +47:01:53
Equinox of date position of star is 01:11:21.9 +47:08:54
Stellar brightness G=14.7, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 81 degrees from the moon. Moon is 10% illuminated.
TNO apparent brightness V=22.5

[RECON map]
TNO is 22.0 AU from the Sun and 21.6 AU from the Earth.
The TNO is moving 16.7 km/sec on the sky relative to the star, or, 3.8 arcsec/hr.
The 1-sigma error in the time of the event is 185 seconds.
The 1-sigma cross-track error in the shadow position is 4428 km.
The sky-plane scale is 15664.2 km/arcsec.

The TNO has an absolute magnitude Hv=8.9
Diameter=100.5 km assuming a 5% albedo -- 6.0 sec chord
Diameter=41.0 km assuming a 30% albedo -- 2.5 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 

Star training set for 601690, (2027/12/31 05:18UT)
Object            RA         Dec     mag  sep  mel
Deneb          20:42:23.2 +45:22:54  1.3 45.08  60
57Gam1And      02:05:37.8 +42:27:46  2.3 10.64  87
42Phi And      01:11:08.5 +47:23:25  4.2  0.23  81
PPM 043728     01:12:53.3 +46:46:41  7.2  0.45  81
42Phi And      01:11:08.5 +47:23:25  4.2  0.23  81
PPM 043679     01:10:25.1 +47:11:32 10.3  0.22  81
601690         01:11:42.6 +47:10:47 14.7        81
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 4.9 sigma about the mid-time.
The median site spacing is 14.2 km RECON observability=1.0 and success probability=4.9%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Dunrhomin 05:17:44 -61.9 Dark Down 49.7 299.0 Up 05:02:44 - 05:32:44 7806
George/Scottsdale 05:18:38 -59.4 Dark Down 50.6 305.0 Up 05:03:38 - 05:33:38 7742
Yuma 05:18:51 -57.3 Dark Down 51.9 306.2 Up 05:03:51 - 05:33:51 7603
Parker 05:18:42 -57.3 Dark Down 52.5 304.6 Up 05:03:42 - 05:33:42 7568
Lake Havasu City 05:18:40 -57.2 Dark Down 52.7 304.3 Up 05:03:40 - 05:33:40 7551
Patrick 05:18:34 -57.4 Dark Down 52.9 303.3 Up 05:03:34 - 05:33:34 7543
Kingman/Dolan Springs 05:18:35 -57.3 Dark Down 52.9 303.5 Up 05:03:35 - 05:33:35 7540
Calipatria 05:18:51 -56.5 Dark Down 52.7 305.8 Up 05:03:51 - 05:33:51 7526
Mohave Valley 05:18:39 -56.9 Dark Down 53.1 303.8 Up 05:03:39 - 05:33:39 7518
Laughlin/Bullhead City 05:18:37 -56.9 Dark Down 53.3 303.5 Up 05:03:37 - 05:33:37 7507
Henderson 05:18:33 -56.3 Dark Down 54.0 302.6 Up 05:03:33 - 05:33:33 7444
Idyllwild 05:18:51 -55.4 Dark Down 53.9 305.3 Up 05:03:51 - 05:33:51 7423
Indian Springs 05:18:32 -55.7 Dark Down 54.8 301.9 Up 05:03:32 - 05:33:32 7376
Beatty 05:18:33 -54.8 Dark Down 55.7 301.5 Up 05:03:33 - 05:33:33 7292
Wildwood 05:18:53 -53.8 Dark Down 55.4 305.1 Up 05:03:53 - 05:33:53 7278
Tonopah 05:18:27 -54.1 Dark Down 56.6 300.1 Up 05:03:27 - 05:33:27 7213
Bishop 05:18:34 -53.4 Dark Down 57.1 301.0 Up 05:03:34 - 05:33:34 7164
Hawthorne 05:18:28 -53.0 Dark Down 57.8 299.4 Up 05:03:28 - 05:33:28 7100
Lee Vining 05:18:32 -52.7 Dark Down 57.9 300.2 Up 05:03:32 - 05:33:32 7091
Sleaford 05:16:45 -54.2 Dark Down 54.7 284.3 Up 05:01:45 - 05:31:45 7048
Yerington 05:18:26 -52.4 Dark Down 58.4 298.7 Up 05:03:26 - 05:33:26 7045
Gardnerville 05:18:28 -52.0 Dark Down 58.8 298.8 Up 05:03:28 - 05:33:28 7008
Carson City 05:18:27 -51.9 Dark Down 58.9 298.4 Up 05:03:27 - 05:33:27 6995
Reno 05:18:25 -51.8 Dark Down 59.1 297.9 Up 05:03:25 - 05:33:25 6978
Portola 05:18:24 -51.3 Dark Down 59.7 297.5 Up 05:03:24 - 05:33:24 6924
Quincy 05:18:25 -50.9 Dark Down 60.1 297.3 Up 05:03:25 - 05:33:25 6886
Susanville 05:18:21 -51.0 Dark Down 60.1 296.6 Up 05:03:21 - 05:33:21 6886
Gimple 05:18:23 -50.9 Dark Down 60.1 297.0 Up 05:03:23 - 05:33:23 6884
Greenville 05:18:24 -50.8 Dark Down 60.2 297.0 Up 05:03:24 - 05:33:24 6878
Cedarville 05:18:14 -51.0 Dark Down 60.3 294.8 Up 05:03:14 - 05:33:14 6871
Lakeview 05:18:10 -50.7 Dark Down 60.7 293.8 Up 05:03:10 - 05:33:10 6830
Fall River/Burney 05:18:19 -50.3 Dark Down 60.9 295.5 Up 05:03:19 - 05:33:19 6810
North Lake 05:18:05 -50.0 Dark Down 61.5 291.9 Up 05:03:05 - 05:33:05 6748
PNWRO 05:17:45 -50.4 Dark Down 61.1 287.7 Up 05:02:45 - 05:32:45 6744
Klamath Falls 05:18:13 -49.7 Dark Down 61.7 293.5 Up 05:03:13 - 05:33:13 6735
Chiloquin 05:18:11 -49.5 Dark Down 61.9 292.9 Up 05:03:11 - 05:33:11 6716
Bend 05:18:01 -49.5 Dark Down 62.1 290.4 Up 05:03:01 - 05:33:01 6686
Oregon Observatory 05:18:03 -49.5 Dark Down 62.1 290.7 Up 05:03:03 - 05:33:03 6685
Sisters 05:18:00 -49.2 Dark Down 62.3 289.9 Up 05:03:00 - 05:33:00 6659
Maupin 05:17:54 -49.3 Dark Down 62.3 288.4 Up 05:02:54 - 05:32:54 6650
Goldendale 05:17:50 -49.2 Dark Down 62.3 287.4 Up 05:02:50 - 05:32:50 6636
Toppenish/White Swan 05:17:46 -49.3 Dark Down 62.2 286.5 Up 05:02:46 - 05:32:46 6636
The Dalles 05:17:52 -49.1 Dark Down 62.5 287.7 Up 05:02:52 - 05:32:52 6624
Yakima 05:17:45 -49.1 Dark Down 62.4 286.0 Up 05:02:45 - 05:32:45 6616
Ellensburg 05:17:43 -49.0 Dark Down 62.5 285.3 Up 05:02:43 - 05:32:43 6598
Wenatchee 05:17:40 -49.0 Dark Down 62.5 284.6 Up 05:02:40 - 05:32:40 6591
Brewster 05:17:34 -49.0 Dark Down 62.3 283.5 Up 05:02:34 - 05:32:34 6589
Okanogan 05:17:33 -49.1 Dark Down 62.3 283.1 Up 05:02:33 - 05:32:33 6587
Tonasket 05:17:31 -49.0 Dark Down 62.2 282.6 Up 05:02:31 - 05:32:31 6579
Manson/Chelan 05:17:37 -48.9 Dark Down 62.5 283.8 Up 05:02:37 - 05:32:37 6578
Anarchist Mountain Observatory 05:17:29 -48.9 Dark Down 62.3 282.0 Up 05:02:29 - 05:32:29 6568
Oliver 05:17:28 -48.7 Dark Down 62.4 281.6 Up 05:02:28 - 05:32:28 6548
Penticton 05:17:26 -48.6 Dark Down 62.5 280.9 Up 05:02:26 - 05:32:26 6530
Summerland 05:17:26 -48.5 Dark Down 62.6 280.8 Up 05:02:26 - 05:32:26 6520
Kelowna 05:17:24 -48.5 Dark Down 62.5 280.4 Up 05:02:24 - 05:32:24 6519
Peachland 05:17:25 -48.4 Dark Down 62.7 280.4 Up 05:02:25 - 05:32:25 6508
Kamloops 05:17:21 -47.6 Dark Down 63.2 278.3 Up 05:02:21 - 05:32:21 6427
Victoria 05:17:39 -46.7 Dark Down 64.8 281.0 Up 05:02:39 - 05:32:39 6354

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 601690, (2027/12/31 05:18UT)
Object            RA         Dec     mag  sep  mel
Deneb          20:41:25.9 +45:16:49  1.3 45.08  60
57Gam1And      02:03:54.1 +42:19:46  2.3 10.64  87
42Phi And      01:09:30.1 +47:14:31  4.2  0.23  81
PPM 043728     01:11:15.0 +46:37:48  7.2  0.45  81
42Phi And      01:09:30.1 +47:14:31  4.2  0.23  81
PPM 043679     01:08:47.0 +47:02:36 10.3  0.22  81
601690         01:10:04.3 +47:01:53 14.7        81
Positions are for J2000

Event circumstances last updated at 2022/02/04 00:29:18 UT

Marc W. Buie, Southwest Research Institute

RECON