RECON: TNO occultation with 118228

Event between (118228) 96TQ66 and star GA1260:01759074 with event index number of 2111208

Geocentric closest approach at 2027/01/27 07:00:50 UTC

J2000 position of star is 05:09:54.3 +37:04:59
Equinox of date position of star is 05:11:24.9 +37:06:35
Stellar brightness G=15.3, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 112 degrees from the moon. Moon is 72% illuminated.
TNO apparent brightness V=22.8

[RECON map]
TNO is 36.1 AU from the Sun and 35.4 AU from the Earth.
The TNO is moving 16.4 km/sec on the sky relative to the star, or, 2.3 arcsec/hr.
The 1-sigma error in the time of the event is 408 seconds.
The 1-sigma cross-track error in the shadow position is 4707 km.
The sky-plane scale is 25677.6 km/arcsec.

The TNO has an absolute magnitude Hv=7.1
Diameter=224.9 km assuming a 5% albedo -- 13.7 sec chord
Diameter=91.8 km assuming a 30% albedo -- 5.6 sec chord
Dynamical classification is 3:2E
 
 
 
 
 
 

Star training set for 118228, (2027/01/27 07:01UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:37:28.6 +16:33:42  0.8 21.90 121
3Iot Aur       04:58:45.7 +33:12:23  2.7  4.72 115
PPM 070048     05:15:07.5 +37:21:59  6.5  0.72 111
PPM 069986     05:11:46.4 +37:02:12  8.3  0.08 112
118228         05:11:44.2 +37:06:55 15.3       111
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 2.2 sigma about the mid-time.
The median site spacing is 30.3 km RECON observability=1.0 and success probability=8.9%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Sleaford 06:57:12 -56.2 Dark Up 54.0 264.5 Up 06:42:12 - 07:12:12 7028
Kamloops 06:58:03 -54.5 Dark Up 62.9 252.7 Up 06:43:03 - 07:13:03 6810
Kelowna 06:57:59 -55.4 Dark Up 62.6 255.2 Up 06:42:59 - 07:12:59 6720
Peachland 06:58:00 -55.4 Dark Up 62.8 255.1 Up 06:43:00 - 07:13:00 6708
Summerland 06:58:00 -55.6 Dark Up 62.8 255.5 Up 06:43:00 - 07:13:00 6691
Penticton 06:57:59 -55.7 Dark Up 62.7 255.7 Up 06:42:59 - 07:12:59 6684
Oliver 06:57:59 -56.0 Dark Up 62.8 256.4 Up 06:42:59 - 07:12:59 6645
Anarchist Mountain Observatory 06:57:59 -56.2 Dark Up 62.7 256.9 Up 06:42:59 - 07:12:59 6626
Tonasket 06:57:59 -56.4 Dark Up 62.9 257.4 Up 06:42:59 - 07:12:59 6592
Victoria 06:58:15 -55.1 Dark Down 65.4 253.5 Up 06:43:15 - 07:13:15 6581
Okanogan 06:57:59 -56.7 Dark Up 63.0 257.9 Up 06:42:59 - 07:12:59 6555
Brewster 06:58:00 -56.8 Dark Up 63.2 258.2 Up 06:43:00 - 07:13:00 6525
Manson/Chelan 06:58:02 -56.9 Dark Up 63.5 258.3 Up 06:43:02 - 07:13:02 6502
Wenatchee 06:58:02 -57.2 Dark Up 63.7 259.0 Up 06:43:02 - 07:13:02 6450
Ellensburg 06:58:02 -57.4 Dark Up 63.9 259.6 Up 06:43:02 - 07:13:02 6404
Yakima 06:58:02 -57.8 Dark Up 64.0 260.4 Up 06:43:02 - 07:13:02 6359
Toppenish/White Swan 06:58:01 -58.0 Dark Up 63.9 261.0 Up 06:43:01 - 07:13:01 6335
PNWRO 06:57:56 -58.9 Dark Up 63.0 263.1 Up 06:42:56 - 07:12:56 6293
Goldendale 06:58:04 -58.3 Dark Up 64.3 261.8 Up 06:43:04 - 07:13:04 6274
The Dalles 06:58:06 -58.3 Dark Up 64.6 261.9 Up 06:43:06 - 07:13:06 6250
Maupin 06:58:05 -58.7 Dark Up 64.6 262.9 Up 06:43:05 - 07:13:05 6203
Sisters 06:58:07 -59.2 Dark Up 65.0 264.3 Up 06:43:07 - 07:13:07 6107
Bend 06:58:06 -59.5 Dark Up 64.8 265.0 Up 06:43:06 - 07:13:06 6080
Oregon Observatory 06:58:08 -59.5 Dark Up 64.9 265.3 Up 06:43:08 - 07:13:08 6061
North Lake 06:58:04 -60.3 Dark Up 64.6 267.1 Up 06:43:04 - 07:13:04 5989
Chiloquin 06:58:09 -60.3 Dark Up 65.3 267.8 Up 06:43:09 - 07:13:09 5916
Klamath Falls 06:58:08 -60.6 Dark Up 65.3 268.6 Up 06:43:08 - 07:13:08 5877
Lakeview 06:58:02 -61.3 Dark Up 64.2 269.7 Up 06:43:02 - 07:13:02 5870
Cedarville 06:58:01 -61.9 Dark Up 64.1 271.1 Up 06:43:01 - 07:13:01 5797
Fall River/Burney 06:58:07 -61.7 Dark Up 65.0 271.4 Up 06:43:07 - 07:13:07 5746
Dunrhomin 06:56:55 -68.0 Dark Up 52.9 281.0 Up 06:41:55 - 07:11:55 5743
CU-SBO 06:56:56 -68.2 Dark Up 52.9 281.2 Up 06:41:56 - 07:11:56 5714
Susanville 06:58:05 -62.5 Dark Up 64.4 273.2 Up 06:43:05 - 07:13:05 5674
Greenville 06:58:05 -62.6 Dark Up 64.6 273.6 Up 06:43:05 - 07:13:05 5644
Gimple 06:58:04 -62.6 Dark Up 64.6 273.6 Up 06:43:04 - 07:13:04 5644
Quincy 06:58:05 -62.7 Dark Up 64.6 274.0 Up 06:43:05 - 07:13:05 5621
Portola 06:58:04 -63.1 Dark Up 64.2 274.5 Up 06:43:04 - 07:13:04 5606
Reno 06:58:01 -63.6 Dark Up 63.7 275.4 Up 06:43:01 - 07:13:01 5576
Carson City 06:58:00 -63.9 Dark Up 63.7 276.1 Up 06:43:00 - 07:13:00 5536
Yerington 06:57:57 -64.3 Dark Up 63.2 276.8 Up 06:42:57 - 07:12:57 5514
Gardnerville 06:58:01 -64.1 Dark Up 63.6 276.6 Up 06:43:01 - 07:13:01 5509
Hawthorne 06:57:54 -64.9 Dark Up 62.7 277.9 Up 06:42:54 - 07:12:54 5463
Tonopah 06:57:48 -66.0 Dark Up 61.6 279.3 Up 06:42:48 - 07:12:48 5412
Lee Vining 06:57:57 -65.1 Dark Up 63.0 278.8 Up 06:42:57 - 07:12:57 5400
Bishop 06:57:55 -65.9 Dark Up 62.3 280.2 Up 06:42:55 - 07:12:55 5334
Beatty 06:57:48 -67.1 Dark Up 61.0 281.6 Up 06:42:48 - 07:12:48 5285
Indian Springs 06:57:41 -67.9 Dark Up 60.1 282.5 Up 06:42:41 - 07:12:41 5251
Henderson 06:57:38 -68.7 Dark Up 59.4 283.6 Up 06:42:38 - 07:12:38 5195
Patrick 06:57:33 -69.7 Dark Up 58.4 284.8 Up 06:42:33 - 07:12:33 5131
Kingman/Dolan Springs 06:57:33 -69.8 Dark Up 58.5 285.1 Up 06:42:33 - 07:12:33 5105
Laughlin/Bullhead City 06:57:35 -69.6 Dark Up 58.9 285.1 Up 06:42:35 - 07:12:35 5101
Mohave Valley 06:57:35 -69.8 Dark Up 58.8 285.5 Up 06:42:35 - 07:12:35 5071
Lake Havasu City 06:57:35 -70.2 Dark Up 58.5 286.2 Up 06:42:35 - 07:12:35 5028
Parker 06:57:35 -70.5 Dark Up 58.4 286.7 Up 06:42:35 - 07:12:35 4989
Wildwood 06:57:57 -68.1 Dark Up 61.7 286.2 Up 06:42:57 - 07:12:57 4974
George/Scottsdale 06:57:23 -72.0 Dark Up 56.4 287.8 Up 06:42:23 - 07:12:23 4957
Idyllwild 06:57:46 -69.5 Dark Up 60.2 287.0 Up 06:42:46 - 07:12:46 4936
Calipatria 06:57:41 -70.6 Dark Up 59.1 288.2 Up 06:42:41 - 07:12:41 4873
Yuma 06:57:37 -71.4 Dark Up 58.2 288.9 Up 06:42:37 - 07:12:37 4829

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 118228, (2027/01/27 07:01UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:35:55.3 +16:30:29  0.8 21.90 121
3Iot Aur       04:56:59.6 +33:09:58  2.7  4.72 115
PPM 070048     05:13:17.2 +37:20:12  6.5  0.72 111
PPM 069986     05:09:56.4 +37:00:16  8.3  0.08 112
118228         05:09:54.3 +37:04:59 15.3       112
Positions are for J2000

Event circumstances last updated at 2022/04/27 23:04:18 UT

Marc W. Buie, Southwest Research Institute

RECON