RECON: TNO occultation with 03UN284

Event between 03UN284 and star UC4-571-011758 with event index number of 104101

Geocentric closest approach at 2018/01/24 09:36:10 UTC

J2000 position of star is 04:38:56.1 +24:00:29
Equinox of date position of star is 04:40:01.2 +24:02:33
Stellar brightness R=13.8, use SENSEUP=64
Star is 44 degrees from the moon. Moon is 44% illuminated.
TNO apparent brightness V=23.8

[RECON map]
TNO is 42.5 AU from the Sun and 41.9 AU from the Earth.
The TNO is moving 14.0 km/sec on the sky relative to the star, or, 1.7 arcsec/hr.
The 1-sigma error in the time of the event is 532 seconds.
The 1-sigma cross-track error in the shadow position is 5563 km.
The sky-plane scale is 30386.6 km/arcsec.

The TNO has an absolute magnitude Hv=7.4
Diameter=197.7 km assuming a 5% albedo -- 14.1 sec chord
Diameter=80.7 km assuming a 30% albedo -- 5.8 sec chord
Dynamical classification is CLASSICAL
 
 
 
 
 
 

Star training set for 03UN284, (2018/01/24 09:36UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:36:57.6 +16:32:39  0.8  7.53  42
3Iot Aur       04:58:10.4 +33:11:35  2.7  9.98  51
PPM 093661     04:40:29.4 +25:15:09  6.3  1.21  45
PPM 093704     04:43:09.8 +24:02:39  7.4  0.72  45
PPM 093684     04:42:04.5 +23:58:25  9.7  0.47  45
PPM 093642     04:38:51.9 +24:04:52 10.2  0.27  44
03UN284        04:40:01.7 +24:02:34 13.8        45
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 1.7 sigma about the mid-time.
The median site spacing is 21.5 km RECON observability=0.9 and success probability=2.4%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Oroville 09:30:26 -56.1 Dark Down 26.2 277.3 Low 09:15:26 - 09:45:26 12252
Tonasket 09:30:25 -56.3 Dark Down 26.1 277.4 Low 09:15:25 - 09:45:25 12232
Okanogan 09:30:23 -56.6 Dark Down 26.2 277.4 Low 09:15:23 - 09:45:23 12198
Brewster 09:30:23 -56.9 Dark Down 26.3 277.4 Low 09:15:23 - 09:45:23 12168
Manson/Chelan 09:30:23 -57.2 Dark Down 26.5 277.3 Low 09:15:23 - 09:45:23 12140
Entiat 09:30:21 -57.5 Dark Down 26.5 277.3 Low 09:15:21 - 09:45:21 12119
Wenatchee 09:30:22 -57.7 Dark Down 26.6 277.4 Low 09:15:22 - 09:45:22 12093
Ellensburg 09:30:19 -58.1 Dark Down 26.7 277.4 Low 09:15:19 - 09:45:19 12050
Pasco 09:30:14 -58.1 Dark Down 25.6 278.7 Low 09:15:14 - 09:45:14 12020
Yakima 09:30:17 -58.5 Dark Down 26.6 277.6 Low 09:15:17 - 09:45:17 12013
PNWRO 09:30:11 -58.2 Dark Down 25.4 279.0 Low 09:15:11 - 09:45:11 12004
Toppenish/White Swan 09:30:17 -58.6 Dark Down 26.5 277.8 Low 09:15:17 - 09:45:17 11998
George/Umatilla 09:30:14 -58.5 Dark Down 25.7 278.7 Low 09:15:14 - 09:45:14 11984
Goldendale 09:30:14 -59.2 Dark Down 26.7 277.8 Low 09:15:14 - 09:45:14 11936
The Dalles 09:30:15 -59.5 Dark Down 26.9 277.7 Low 09:15:15 - 09:45:15 11905
Niwot 09:29:32 -54.0 Dark Down 14.4 289.5 Really Low 09:14:32 - 09:44:32 11897
Maupin 09:30:12 -59.8 Dark Down 26.8 277.9 Low 09:15:12 - 09:45:12 11869
Madras/Culver 09:30:09 -60.3 Dark Down 26.8 278.2 Low 09:15:09 - 09:45:09 11818
Redmond 09:30:08 -60.6 Dark Down 26.8 278.3 Low 09:15:08 - 09:45:08 11783
Sisters 09:30:10 -60.7 Dark Down 27.0 278.1 Low 09:15:10 - 09:45:10 11774
Bend 09:30:08 -60.8 Dark Down 26.8 278.3 Low 09:15:08 - 09:45:08 11759
Oregon Observatory 09:30:08 -61.0 Dark Down 26.9 278.3 Low 09:15:08 - 09:45:08 11739
La Pine/Gilchrist 09:30:05 -61.2 Dark Down 26.9 278.4 Low 09:15:05 - 09:45:05 11718
North Lake 09:30:03 -61.3 Dark Down 26.4 279.0 Low 09:15:03 - 09:45:03 11694
Paisley 09:30:01 -61.6 Dark Down 26.1 279.5 Low 09:15:01 - 09:45:01 11652
Lakeview 09:29:59 -61.9 Dark Down 25.9 279.8 Low 09:14:59 - 09:44:59 11610
Chiloquin 09:30:02 -62.3 Dark Down 27.0 278.7 Low 09:15:02 - 09:45:02 11604
Klamath Falls 09:30:01 -62.5 Dark Down 26.9 279.0 Low 09:15:01 - 09:45:01 11573
Tulelake 09:29:58 -62.6 Dark Down 26.6 279.3 Low 09:14:58 - 09:44:58 11556
Cedarville 09:29:55 -62.3 Dark Down 25.6 280.2 Low 09:14:55 - 09:44:55 11552
Fall River/Burney 09:29:55 -63.2 Dark Down 26.5 279.8 Low 09:14:55 - 09:44:55 11471
Susanville 09:29:52 -63.3 Dark Down 25.8 280.5 Low 09:14:52 - 09:44:52 11432
Gimple 09:29:51 -63.7 Dark Down 25.9 280.5 Low 09:14:51 - 09:44:51 11399
Greenville 09:29:53 -63.7 Dark Down 26.0 280.4 Low 09:14:53 - 09:44:53 11397
Portola 09:29:48 -63.7 Dark Down 25.6 280.9 Low 09:14:48 - 09:44:48 11379
Quincy 09:29:49 -63.8 Dark Down 25.9 280.5 Low 09:14:49 - 09:44:49 11378
Reno 09:29:47 -63.5 Dark Down 25.0 281.4 Low 09:14:47 - 09:44:47 11373
Yerington 09:29:42 -63.6 Dark Down 24.4 282.0 Low 09:14:42 - 09:44:42 11339
Carson City 09:29:44 -63.8 Dark Down 24.9 281.5 Low 09:14:44 - 09:44:44 11339
Gardnerville 09:29:45 -63.9 Dark Down 24.8 281.7 Low 09:14:45 - 09:44:45 11317
Hawthorne 09:29:42 -63.6 Dark Down 23.9 282.5 Low 09:14:42 - 09:44:42 11311
Tonopah 09:29:37 -63.0 Dark Down 22.7 283.4 Low 09:14:37 - 09:44:37 11309
Lee Vining 09:29:40 -64.2 Dark Down 24.2 282.4 Low 09:14:40 - 09:44:40 11241
Indian Springs 09:29:30 -62.9 Dark Down 21.2 284.8 Low 09:14:30 - 09:44:30 11215
Beatty 09:29:31 -63.4 Dark Down 22.1 284.1 Low 09:14:31 - 09:44:31 11212
Bishop 09:29:37 -64.2 Dark Down 23.5 283.1 Low 09:14:37 - 09:44:37 11205
Henderson 09:29:25 -62.7 Dark Down 20.6 285.3 Low 09:14:25 - 09:44:25 11186
Patrick 09:29:20 -62.3 Dark Down 19.5 286.1 Really Low 09:14:20 - 09:44:20 11163
DCO 09:29:20 -61.9 Dark Down 18.9 286.6 Really Low 09:14:20 - 09:44:20 11158
Lone Pine 09:29:33 -64.4 Dark Down 23.1 283.6 Low 09:14:33 - 09:44:33 11142
Kingman/Dolan Springs 09:29:21 -62.5 Dark Down 19.6 286.1 Really Low 09:14:21 - 09:44:21 11135
Searchlight/Boulder City 09:29:23 -63.0 Dark Down 20.4 285.6 Low 09:14:23 - 09:44:23 11133
Laughlin/Bullhead City 09:29:20 -62.9 Dark Down 20.0 285.8 Low 09:14:20 - 09:44:20 11116
Mohave Valley 09:29:19 -63.0 Dark Down 19.9 285.9 Really Low 09:14:19 - 09:44:19 11089
Lake Havasu City 09:29:19 -63.1 Dark Down 19.6 286.2 Really Low 09:14:19 - 09:44:19 11059
Parker 09:29:18 -63.2 Dark Down 19.5 286.3 Really Low 09:14:18 - 09:44:18 11026
Blythe 09:29:16 -63.7 Dark Down 19.6 286.4 Really Low 09:14:16 - 09:44:16 10964
CPSLO 09:29:34 -66.9 Dark Down 24.8 282.8 Low 09:14:34 - 09:44:34 10933
Idyllwild 09:29:20 -65.2 Dark Down 21.3 285.3 Low 09:14:20 - 09:44:20 10904
Calipatria 09:29:16 -64.6 Dark Down 20.2 286.1 Low 09:14:16 - 09:44:16 10884
Wildwood 09:29:26 -66.3 Dark Down 22.9 284.3 Low 09:14:26 - 09:44:26 10878
Yuma 09:29:15 -64.1 Dark Down 19.4 286.7 Really Low 09:14:15 - 09:44:15 10872

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 03UN284, (2018/01/24 09:36UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:35:55.3 +16:30:30  0.8  7.53  42
3Iot Aur       04:56:59.6 +33:09:58  2.7  9.98  51
PPM 093661     04:39:23.2 +25:13:05  6.3  1.21  45
PPM 093704     04:42:04.1 +24:00:39  7.4  0.72  45
PPM 093684     04:40:58.8 +23:56:23  9.7  0.47  45
PPM 093642     04:37:46.2 +24:02:46 10.2  0.27  44
03UN284        04:38:56.1 +24:00:29 13.8        44
Positions are for J2000

Event circumstances last updated at 2017/12/02 17:12:48 UT

Marc W. Buie, Southwest Research Institute

RECON