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 09:36:11 UTC

J2000 position of star is 04:38:56.1 +24:00:29
Equinox of date position of star is 04:39:59.0 +24:02:29
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 5564 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 21.6 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 12260
Tonasket 09:30:26 -56.3 Dark Down 26.1 277.4 Low 09:15:26 - 09:45:26 12239
Okanogan 09:30:22 -56.6 Dark Down 26.2 277.4 Low 09:15:22 - 09:45:22 12205
Brewster 09:30:21 -56.9 Dark Down 26.3 277.4 Low 09:15:21 - 09:45:21 12176
Manson/Chelan 09:30:22 -57.2 Dark Down 26.5 277.3 Low 09:15:22 - 09:45:22 12148
Entiat 09:30:19 -57.5 Dark Down 26.5 277.3 Low 09:15:19 - 09:45:19 12126
Wenatchee 09:30:21 -57.7 Dark Down 26.6 277.4 Low 09:15:21 - 09:45:21 12101
Ellensburg 09:30:19 -58.1 Dark Down 26.7 277.4 Low 09:15:19 - 09:45:19 12058
Pasco 09:30:12 -58.1 Dark Down 25.6 278.7 Low 09:15:12 - 09:45:12 12028
Yakima 09:30:16 -58.5 Dark Down 26.6 277.6 Low 09:15:16 - 09:45:16 12021
PNWRO 09:30:12 -58.2 Dark Down 25.4 279.0 Low 09:15:12 - 09:45:12 12012
Toppenish/White Swan 09:30:14 -58.6 Dark Down 26.5 277.8 Low 09:15:14 - 09:45:14 12005
George/Umatilla 09:30:12 -58.5 Dark Down 25.7 278.7 Low 09:15:12 - 09:45:12 11992
Goldendale 09:30:14 -59.2 Dark Down 26.7 277.8 Low 09:15:14 - 09:45:14 11943
The Dalles 09:30:12 -59.5 Dark Down 26.9 277.7 Low 09:15:12 - 09:45:12 11913
Niwot 09:29:31 -54.0 Dark Down 14.4 289.5 Really Low 09:14:31 - 09:44:31 11908
Maupin 09:30:11 -59.8 Dark Down 26.8 277.9 Low 09:15:11 - 09:45:11 11877
Madras/Culver 09:30:09 -60.3 Dark Down 26.8 278.2 Low 09:15:09 - 09:45:09 11826
Redmond 09:30:06 -60.6 Dark Down 26.8 278.3 Low 09:15:06 - 09:45:06 11791
Sisters 09:30:10 -60.7 Dark Down 27.0 278.1 Low 09:15:10 - 09:45:10 11782
Bend 09:30:08 -60.8 Dark Down 26.8 278.3 Low 09:15:08 - 09:45:08 11767
Oregon Observatory 09:30:07 -61.0 Dark Down 26.9 278.3 Low 09:15:07 - 09:45:07 11748
La Pine/Gilchrist 09:30:06 -61.2 Dark Down 26.9 278.4 Low 09:15:06 - 09:45:06 11727
North Lake 09:30:02 -61.3 Dark Down 26.4 279.0 Low 09:15:02 - 09:45:02 11703
Paisley 09:30:01 -61.6 Dark Down 26.1 279.5 Low 09:15:01 - 09:45:01 11661
Lakeview 09:29:56 -61.9 Dark Down 25.9 279.8 Low 09:14:56 - 09:44:56 11618
Chiloquin 09:30:01 -62.3 Dark Down 27.0 278.7 Low 09:15:01 - 09:45:01 11612
Klamath Falls 09:30:01 -62.5 Dark Down 26.9 279.0 Low 09:15:01 - 09:45:01 11582
Tulelake 09:29:59 -62.6 Dark Down 26.6 279.3 Low 09:14:59 - 09:44:59 11565
Cedarville 09:29:54 -62.3 Dark Down 25.6 280.2 Low 09:14:54 - 09:44:54 11561
Fall River/Burney 09:29:55 -63.2 Dark Down 26.5 279.8 Low 09:14:55 - 09:44:55 11480
Susanville 09:29:51 -63.3 Dark Down 25.8 280.5 Low 09:14:51 - 09:44:51 11441
Gimple 09:29:51 -63.7 Dark Down 25.9 280.5 Low 09:14:51 - 09:44:51 11408
Greenville 09:29:49 -63.7 Dark Down 26.0 280.4 Low 09:14:49 - 09:44:49 11406
Portola 09:29:47 -63.7 Dark Down 25.6 280.9 Low 09:14:47 - 09:44:47 11388
Quincy 09:29:51 -63.8 Dark Down 25.9 280.5 Low 09:14:51 - 09:44:51 11386
Reno 09:29:46 -63.5 Dark Down 25.0 281.4 Low 09:14:46 - 09:44:46 11382
Yerington 09:29:43 -63.6 Dark Down 24.4 282.0 Low 09:14:43 - 09:44:43 11349
Carson City 09:29:44 -63.8 Dark Down 24.9 281.5 Low 09:14:44 - 09:44:44 11348
Gardnerville 09:29:44 -63.9 Dark Down 24.9 281.7 Low 09:14:44 - 09:44:44 11326
Hawthorne 09:29:40 -63.6 Dark Down 23.9 282.5 Low 09:14:40 - 09:44:40 11320
Tonopah 09:29:36 -63.0 Dark Down 22.7 283.4 Low 09:14:36 - 09:44:36 11319
Lee Vining 09:29:37 -64.2 Dark Down 24.2 282.4 Low 09:14:37 - 09:44:37 11250
Indian Springs 09:29:27 -62.9 Dark Down 21.2 284.8 Low 09:14:27 - 09:44:27 11225
Beatty 09:29:31 -63.4 Dark Down 22.1 284.1 Low 09:14:31 - 09:44:31 11222
Bishop 09:29:36 -64.2 Dark Down 23.5 283.1 Low 09:14:36 - 09:44:36 11215
Henderson 09:29:24 -62.7 Dark Down 20.6 285.3 Low 09:14:24 - 09:44:24 11196
Patrick 09:29:19 -62.3 Dark Down 19.5 286.1 Really Low 09:14:19 - 09:44:19 11173
DCO 09:29:19 -61.9 Dark Down 18.9 286.6 Really Low 09:14:19 - 09:44:19 11168
Lone Pine 09:29:30 -64.5 Dark Down 23.1 283.6 Low 09:14:30 - 09:44:30 11151
Kingman/Dolan Springs 09:29:21 -62.5 Dark Down 19.6 286.1 Really Low 09:14:21 - 09:44:21 11145
Searchlight/Boulder City 09:29:23 -63.0 Dark Down 20.4 285.6 Low 09:14:23 - 09:44:23 11143
Laughlin/Bullhead City 09:29:20 -62.9 Dark Down 20.0 285.8 Low 09:14:20 - 09:44:20 11125
Mohave Valley 09:29:21 -63.0 Dark Down 19.9 285.9 Really Low 09:14:21 - 09:44:21 11099
Lake Havasu City 09:29:16 -63.1 Dark Down 19.6 286.2 Really Low 09:14:16 - 09:44:16 11069
Parker 09:29:17 -63.2 Dark Down 19.5 286.3 Really Low 09:14:17 - 09:44:17 11035
Blythe 09:29:17 -63.7 Dark Down 19.6 286.4 Really Low 09:14:17 - 09:44:17 10974
CPSLO 09:29:33 -66.9 Dark Down 24.8 282.8 Low 09:14:33 - 09:44:33 10942
Idyllwild 09:29:20 -65.2 Dark Down 21.3 285.3 Low 09:14:20 - 09:44:20 10914
Calipatria 09:29:17 -64.6 Dark Down 20.2 286.1 Low 09:14:17 - 09:44:17 10894
Wildwood 09:29:23 -66.3 Dark Down 22.9 284.3 Low 09:14:23 - 09:44:23 10887
Yuma 09:29:15 -64.1 Dark Down 19.4 286.7 Really Low 09:14:15 - 09:44:15 10882

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 2017/04/24 16:16:49 UT

Marc W. Buie, Southwest Research Institute

RECON