RECON: TNO occultation with 05UN524

Event between 05UN524 and star UC4-647-039174 with event index number of 93425

Geocentric closest approach at 2017/12/30 08:44:45 UTC

J2000 position of star is 06:35:29.3 +39:15:33
Equinox of date position of star is 06:36:41.5 +39:14:39
Stellar brightness R=15.5, use SENSEUP=128
Star is 42 degrees from the moon. Moon is 89% illuminated.
TNO apparent brightness V=22.0

[RECON map]
TNO is 18.7 AU from the Sun and 17.8 AU from the Earth.
The TNO is moving 23.1 km/sec on the sky relative to the star, or, 6.4 arcsec/hr.
The 1-sigma error in the time of the event is 379 seconds.
The 1-sigma cross-track error in the shadow position is 1228 km.
The sky-plane scale is 12908.1 km/arcsec.

The TNO has an absolute magnitude Hv=9.3
Diameter=84.3 km assuming a 5% albedo -- 3.7 sec chord
Diameter=34.4 km assuming a 30% albedo -- 1.5 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 

Star training set for 05UN524, (2017/12/30 08:45UT)
Object            RA         Dec     mag  sep  mel
Pollux         07:46:24.9 +27:58:53  1.1 18.31  54
34Bet Aur      06:00:51.0 +44:56:50  1.9  8.76  39
51 Aur         06:39:54.3 +39:22:24  5.7  0.63  43
PPM 071777     06:34:56.6 +39:25:52  8.1  0.39  42
PPM 071837     06:37:25.2 +38:56:17 10.0  0.33  42
PPM 071804     06:36:01.2 +39:00:08 10.2  0.28  42
05UN524        06:36:44.1 +39:14:37 15.5        42
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 2.4 sigma about the mid-time.
The median site spacing is 24.0 km RECON observability=1.0 and success probability=11.2%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Oroville 08:44:13 -62.8 Dark Up 77.2 225.3 Up 08:29:13 - 08:59:13 3580
Tonasket 08:44:13 -63.0 Dark Up 77.4 226.0 Up 08:29:13 - 08:59:13 3555
Okanogan 08:44:13 -63.3 Dark Up 77.7 226.7 Up 08:29:13 - 08:59:13 3517
Brewster 08:44:13 -63.7 Dark Up 78.0 227.0 Up 08:29:13 - 08:59:13 3485
Manson/Chelan 08:44:14 -63.9 Dark Up 78.3 226.7 Up 08:29:14 - 08:59:14 3456
Entiat 08:44:13 -64.2 Dark Up 78.5 227.3 Up 08:29:13 - 08:59:13 3432
Wenatchee 08:44:13 -64.4 Dark Up 78.7 227.9 Up 08:29:13 - 08:59:13 3403
Ellensburg 08:44:14 -64.9 Dark Up 79.1 228.8 Up 08:29:14 - 08:59:14 3355
Yakima 08:44:13 -65.2 Dark Up 79.3 230.4 Up 08:29:13 - 08:59:13 3311
Pasco 08:44:09 -65.2 Dark Up 78.8 235.8 Up 08:29:09 - 08:59:09 3300
Toppenish/White Swan 08:44:13 -65.4 Dark Up 79.4 231.8 Up 08:29:13 - 08:59:13 3291
PNWRO 08:44:07 -65.3 Dark Up 78.8 237.5 Up 08:29:07 - 08:59:07 3278
George/Umatilla 08:44:09 -65.5 Dark Up 79.1 236.7 Up 08:29:09 - 08:59:09 3260
Goldendale 08:44:13 -66.0 Dark Up 80.0 232.9 Up 08:29:13 - 08:59:13 3224
The Dalles 08:44:14 -66.3 Dark Up 80.3 232.8 Up 08:29:14 - 08:59:14 3194
Maupin 08:44:13 -66.7 Dark Up 80.5 235.1 Up 08:29:13 - 08:59:13 3150
Madras/Culver 08:44:13 -67.2 Dark Up 80.8 237.7 Up 08:29:13 - 08:59:13 3091
Redmond 08:44:13 -67.5 Dark Up 81.0 239.5 Up 08:29:13 - 08:59:13 3051
Sisters 08:44:14 -67.6 Dark Up 81.3 238.1 Up 08:29:14 - 08:59:14 3047
Bend 08:44:13 -67.8 Dark Up 81.2 240.3 Up 08:29:13 - 08:59:13 3026
Oregon Observatory 08:44:13 -68.0 Dark Up 81.4 240.9 Up 08:29:13 - 08:59:13 3005
Niwot 08:43:14 -62.9 Dark Up 70.2 275.9 Up 08:28:14 - 08:58:14 2997
La Pine/Gilchrist 08:44:13 -68.2 Dark Up 81.5 241.9 Up 08:29:13 - 08:59:13 2982
North Lake 08:44:11 -68.4 Dark Up 81.3 246.1 Up 08:29:11 - 08:59:11 2945
Paisley 08:44:09 -68.8 Dark Up 81.3 250.3 Up 08:29:09 - 08:59:09 2892
Chiloquin 08:44:13 -69.3 Dark Up 82.2 247.9 Up 08:29:13 - 08:59:13 2855
Lakeview 08:44:08 -69.2 Dark Up 81.3 253.9 Up 08:29:08 - 08:59:08 2840
Klamath Falls 08:44:13 -69.6 Dark Up 82.3 250.5 Up 08:29:13 - 08:59:13 2820
Tulelake 08:44:11 -69.8 Dark Up 82.2 253.1 Up 08:29:11 - 08:59:11 2795
Cedarville 08:44:06 -69.7 Dark Up 81.4 258.4 Up 08:29:06 - 08:59:06 2773
Fall River/Burney 08:44:10 -70.6 Dark Up 82.3 259.7 Up 08:29:10 - 08:59:10 2698
Susanville 08:44:07 -70.9 Dark Up 81.9 265.2 Up 08:29:07 - 08:59:07 2643
Gimple 08:44:07 -71.2 Dark Up 82.0 267.0 Up 08:29:07 - 08:59:07 2609
Greenville 08:44:08 -71.2 Dark Up 82.1 266.9 Up 08:29:08 - 08:59:08 2608
Quincy 08:44:08 -71.4 Dark Up 82.1 268.3 Up 08:29:08 - 08:59:08 2586
Portola 08:44:06 -71.3 Dark Up 81.8 269.6 Up 08:29:06 - 08:59:06 2581
Reno 08:44:03 -71.3 Dark Up 81.3 271.7 Up 08:29:03 - 08:59:03 2565
Carson City 08:44:02 -71.6 Dark Up 81.2 274.1 Up 08:29:02 - 08:59:02 2527
Yerington 08:44:01 -71.5 Dark Up 80.7 275.4 Up 08:29:01 - 08:59:01 2518
Gardnerville 08:44:02 -71.8 Dark Up 81.2 275.6 Up 08:29:02 - 08:59:02 2501
Hawthorne 08:43:59 -71.6 Dark Up 80.3 278.2 Up 08:28:59 - 08:58:59 2479
Tonopah 08:43:53 -71.3 Dark Up 79.1 280.6 Up 08:28:53 - 08:58:53 2459
Lee Vining 08:43:59 -72.3 Dark Up 80.5 281.6 Up 08:28:59 - 08:58:59 2408
Bishop 08:43:56 -72.5 Dark Up 79.9 284.7 Up 08:28:56 - 08:58:56 2358
Beatty 08:43:50 -71.9 Dark Up 78.5 286.2 Up 08:28:50 - 08:58:50 2345
Indian Springs 08:43:45 -71.6 Dark Up 77.6 287.2 Up 08:28:45 - 08:58:45 2335
Henderson 08:43:42 -71.5 Dark Up 76.9 289.0 Up 08:28:42 - 08:58:42 2294
Lone Pine 08:43:54 -72.9 Dark Up 79.4 288.5 Up 08:28:54 - 08:58:54 2283
Patrick 08:43:37 -71.2 Dark Up 75.9 290.9 Up 08:28:37 - 08:58:37 2256
DCO 08:43:37 -70.9 Dark Up 75.2 291.6 Up 08:28:37 - 08:58:37 2243
Searchlight/Boulder City 08:43:41 -71.8 Dark Up 76.7 291.3 Up 08:28:41 - 08:58:41 2235
Kingman/Dolan Springs 08:43:37 -71.5 Dark Up 75.9 291.8 Up 08:28:37 - 08:58:37 2227
Laughlin/Bullhead City 08:43:39 -71.8 Dark Up 76.3 292.2 Up 08:28:39 - 08:58:39 2212
Mohave Valley 08:43:39 -72.0 Dark Up 76.2 293.2 Up 08:28:39 - 08:58:39 2183
Lake Havasu City 08:43:37 -72.0 Dark Up 75.8 294.5 Up 08:28:37 - 08:58:37 2146
Parker 08:43:37 -72.2 Dark Up 75.7 295.8 Up 08:28:37 - 08:58:37 2110
CPSLO 08:44:02 -75.2 Dark Up 80.8 298.5 Up 08:29:02 - 08:59:02 2090
Blythe 08:43:37 -72.7 Dark Up 75.7 297.9 Up 08:28:37 - 08:58:37 2046
Idyllwild 08:43:46 -74.1 Dark Up 77.2 299.8 Up 08:28:46 - 08:58:46 2006
Wildwood 08:43:53 -75.0 Dark Up 78.7 300.9 Up 08:28:53 - 08:58:53 2002
Calipatria 08:43:41 -73.6 Dark Up 76.1 300.6 Up 08:28:41 - 08:58:41 1970
Yuma 08:43:37 -73.2 Dark Up 75.2 301.0 Up 08:28:37 - 08:58:37 1947

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 05UN524, (2017/12/30 08:45UT)
Object            RA         Dec     mag  sep  mel
Pollux         07:45:18.1 +28:01:33  1.1 18.31  54
34Bet Aur      05:59:31.6 +44:56:51  1.9  8.76  39
51 Aur         06:38:39.5 +39:23:25  5.7  0.63  43
PPM 071777     06:33:41.7 +39:26:46  8.1  0.39  42
PPM 071837     06:36:10.7 +38:57:14 10.0  0.33  42
PPM 071804     06:34:46.6 +39:01:04 10.2  0.28  42
05UN524        06:35:29.3 +39:15:33 15.5        42
Positions are for J2000

Event circumstances last updated at 2017/05/15 18:04:35 UT

Marc W. Buie, Southwest Research Institute

RECON