RECON: TNO occultation with 449097

Event between (449097) 12UT68 and star UC4-625-026007 with event index number of 96776

Geocentric closest approach at 2017/12/28 06:32:15 UTC

J2000 position of star is 05:40:50.5 +34:49:45
Equinox of date position of star is 05:42:00.0 +34:50:13
Stellar brightness R=15.2, use SENSEUP=128
Star is 58 degrees from the moon. Moon is 70% illuminated.
TNO apparent brightness V=20.8

[RECON map]
TNO is 13.4 AU from the Sun and 12.4 AU from the Earth.
The TNO is moving 20.7 km/sec on the sky relative to the star, or, 8.2 arcsec/hr.
The 1-sigma error in the time of the event is 55 seconds.
The 1-sigma cross-track error in the shadow position is 525 km.
The sky-plane scale is 9024.5 km/arcsec.

The TNO has an absolute magnitude Hv=9.6
Diameter=72.4 km assuming a 5% albedo -- 3.5 sec chord
Diameter=29.6 km assuming a 30% albedo -- 1.4 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 

Star training set for 449097, (2017/12/28 06:32UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:36:57.3 +16:32:39  0.8 23.37  40
Alnath         05:27:25.8 +28:37:16  1.6  6.95  53
PPM 070537     05:34:50.0 +34:44:12  6.1  1.48  57
PPM 070662     05:40:04.7 +35:05:13  8.3  0.47  58
PPM 070719     05:42:41.2 +34:49:14  9.8  0.13  58
449097         05:42:02.5 +34:50:14 15.2        58
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 24.8 km RECON observability=1.0 and success probability=0.2%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Oroville 06:32:49 -59.2 Dark Up 74.2 150.0 Up 06:27:43 - 06:37:54 3998
Tonasket 06:32:49 -59.4 Dark Up 74.4 149.6 Up 06:27:43 - 06:37:54 3973
Okanogan 06:32:50 -59.6 Dark Up 74.7 148.6 Up 06:27:44 - 06:37:55 3937
Brewster 06:32:51 -59.7 Dark Up 74.8 147.5 Up 06:27:45 - 06:37:56 3910
Manson/Chelan 06:32:52 -59.6 Dark Up 74.9 146.0 Up 06:27:46 - 06:37:57 3890
Entiat 06:32:52 -59.8 Dark Up 75.0 145.4 Up 06:27:47 - 06:37:58 3867
Wenatchee 06:32:53 -59.9 Dark Up 75.2 144.5 Up 06:27:47 - 06:37:58 3840
Ellensburg 06:32:54 -60.1 Dark Up 75.5 143.0 Up 06:27:49 - 06:38:00 3797
Yakima 06:32:55 -60.4 Dark Up 75.8 142.0 Up 06:27:49 - 06:38:00 3753
Toppenish/White Swan 06:32:54 -60.6 Dark Up 76.0 141.9 Up 06:27:49 - 06:38:00 3729
Pasco 06:32:49 -61.3 Dark Up 76.6 145.4 Up 06:27:44 - 06:37:55 3706
PNWRO 06:32:49 -61.6 Dark Up 76.9 145.5 Up 06:27:43 - 06:37:54 3678
Goldendale 06:32:56 -60.8 Dark Up 76.3 139.3 Up 06:27:50 - 06:38:01 3672
George/Umatilla 06:32:51 -61.4 Dark Up 76.8 143.9 Up 06:27:45 - 06:37:56 3671
The Dalles 06:32:58 -60.7 Dark Up 76.3 137.7 Up 06:27:52 - 06:38:03 3651
Maupin 06:32:58 -61.1 Dark Up 76.6 136.8 Up 06:27:52 - 06:38:03 3604
Madras/Culver 06:32:58 -61.4 Dark Up 77.0 135.1 Up 06:27:53 - 06:38:04 3545
Sisters 06:33:00 -61.4 Dark Up 77.0 132.8 Up 06:27:54 - 06:38:05 3513
Redmond 06:32:59 -61.6 Dark Up 77.2 133.8 Up 06:27:53 - 06:38:04 3507
Bend 06:32:59 -61.7 Dark Up 77.3 132.7 Up 06:27:54 - 06:38:05 3485
Oregon Observatory 06:33:00 -61.7 Dark Up 77.3 131.8 Up 06:27:54 - 06:38:05 3467
La Pine/Gilchrist 06:33:00 -61.8 Dark Up 77.4 130.9 Up 06:27:55 - 06:38:06 3445
North Lake 06:32:58 -62.4 Dark Up 78.1 131.1 Up 06:27:53 - 06:38:04 3393
Paisley 06:32:57 -63.0 Dark Up 78.6 130.2 Up 06:27:52 - 06:38:03 3329
Chiloquin 06:33:03 -62.3 Dark Up 77.9 126.0 Up 06:27:57 - 06:38:08 3327
Klamath Falls 06:33:02 -62.5 Dark Up 78.2 124.9 Up 06:27:57 - 06:38:08 3289
Lakeview 06:32:57 -63.4 Dark Up 79.0 128.8 Up 06:27:51 - 06:38:02 3272
Tulelake 06:33:01 -62.9 Dark Up 78.5 124.6 Up 06:27:56 - 06:38:07 3257
Cedarville 06:32:56 -63.9 Dark Up 79.6 126.6 Up 06:27:51 - 06:38:02 3199
Fall River/Burney 06:33:02 -63.5 Dark Up 79.1 121.0 Up 06:27:56 - 06:38:07 3156
Susanville 06:32:59 -64.3 Dark Up 79.9 120.0 Up 06:27:54 - 06:38:05 3081
Greenville 06:33:00 -64.3 Dark Up 79.8 117.9 Up 06:27:55 - 06:38:06 3053
Gimple 06:33:00 -64.3 Dark Up 79.9 118.1 Up 06:27:55 - 06:38:06 3052
Quincy 06:33:01 -64.4 Dark Up 79.9 116.9 Up 06:27:55 - 06:38:06 3031
Portola 06:32:59 -64.7 Dark Up 80.3 117.5 Up 06:27:53 - 06:38:04 3012
Niwot 06:31:56 -72.0 Dark Up 83.6 215.7 Up 06:26:51 - 06:37:02 3010
Reno 06:32:56 -65.3 Dark Up 80.8 117.9 Up 06:27:51 - 06:38:02 2978
Carson City 06:32:56 -65.5 Dark Up 81.0 116.0 Up 06:27:51 - 06:38:02 2938
Yerington 06:32:54 -66.0 Dark Up 81.5 116.6 Up 06:27:48 - 06:37:59 2912
Gardnerville 06:32:56 -65.7 Dark Up 81.2 114.7 Up 06:27:51 - 06:38:02 2911
Hawthorne 06:32:52 -66.6 Dark Up 82.1 115.3 Up 06:27:46 - 06:37:57 2856
Lee Vining 06:32:54 -66.6 Dark Up 82.0 110.2 Up 06:27:49 - 06:38:00 2798
Tonopah 06:32:46 -67.8 Dark Up 83.3 116.6 Up 06:27:40 - 06:37:51 2795
Bishop 06:32:51 -67.4 Dark Up 82.7 107.8 Up 06:27:46 - 06:37:57 2726
Beatty 06:32:45 -68.7 Dark Up 84.1 108.4 Up 06:27:39 - 06:37:50 2664
Lone Pine 06:32:50 -68.1 Dark Up 83.2 102.6 Up 06:27:45 - 06:37:56 2640
Indian Springs 06:32:40 -69.6 Dark Up 85.0 108.6 Up 06:27:35 - 06:37:46 2622
Henderson 06:32:37 -70.4 Dark Up 85.7 104.7 Up 06:27:32 - 06:37:43 2560
CPSLO 06:33:02 -66.9 Dark Up 81.2 90.0 Up 06:27:57 - 06:38:08 2517
Searchlight/Boulder City 06:32:37 -70.8 Dark Up 85.8 97.3 Up 06:27:32 - 06:37:43 2496
Patrick 06:32:32 -71.5 Dark Up 86.7 98.9 Up 06:27:27 - 06:37:38 2486
Kingman/Dolan Springs 06:32:33 -71.5 Dark Up 86.5 94.8 Up 06:27:28 - 06:37:39 2462
Laughlin/Bullhead City 06:32:35 -71.2 Dark Up 86.1 93.7 Up 06:27:30 - 06:37:41 2462
DCO 06:32:29 -72.1 Dark Up 87.3 94.9 Up 06:27:24 - 06:37:35 2450
Mohave Valley 06:32:36 -71.3 Dark Up 86.1 89.6 Up 06:27:30 - 06:37:41 2431
Lake Havasu City 06:32:34 -71.7 Dark Up 86.3 83.5 Up 06:27:29 - 06:37:40 2386
Wildwood 06:32:54 -68.9 Dark Up 82.8 81.7 Up 06:27:48 - 06:37:59 2366
Parker 06:32:34 -71.9 Dark Up 86.3 78.1 Up 06:27:29 - 06:37:40 2347
Idyllwild 06:32:45 -70.4 Dark Up 84.3 77.1 Up 06:27:40 - 06:37:51 2314
Blythe 06:32:36 -72.0 Dark Up 85.9 71.5 Up 06:27:30 - 06:37:41 2290
Calipatria 06:32:40 -71.6 Dark Up 85.0 68.4 Up 06:27:35 - 06:37:46 2240
Yuma 06:32:36 -72.4 Dark Up 85.5 60.3 Up 06:27:31 - 06:37:42 2188

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 449097, (2017/12/28 06:32UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:35:55.3 +16:30:30  0.8 23.37  40
Alnath         05:26:17.5 +28:36:24  1.6  6.95  53
PPM 070537     05:33:38.2 +34:43:32  6.1  1.48  57
PPM 070662     05:38:52.5 +35:04:41  8.3  0.47  58
PPM 070719     05:41:29.2 +34:48:46  9.8  0.13  58
449097         05:40:50.5 +34:49:45 15.2        58
Positions are for J2000

Event circumstances last updated at 2017/05/17 17:58:28 UT

Marc W. Buie, Southwest Research Institute

RECON