RECON: TNO occultation with 303712

Event between (303712) 05PR21 and star UC4-439-123929 with event index number of 155261

Geocentric closest approach at 2018/10/24 05:52:02 UTC

J2000 position of star is 23:34:20.0 -02:23:30
Equinox of date position of star is 23:35:15.2 -02:17:33
Stellar brightness R=16.0, use SENSEUP=128
Star is 32 degrees from the moon. Moon is 100% illuminated.
TNO apparent brightness V=22.5

[RECON map]
TNO is 41.8 AU from the Sun and 41.0 AU from the Earth.
The TNO is moving 18.8 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 224 seconds.
The 1-sigma cross-track error in the shadow position is 3443 km.
The sky-plane scale is 29736.0 km/arcsec.

The TNO has an absolute magnitude Hv=6.2
Diameter=346.7 km assuming a 5% albedo -- 18.5 sec chord
Diameter=141.6 km assuming a 30% albedo -- 7.5 sec chord
Dynamical classification is CLASSICAL
 
 
 
 
 
 

Star training set for 303712, (2018/10/24 05:52UT)
Object            RA         Dec     mag  sep  mel
Fomalhaut      22:58:41.2 -29:31:20  1.2 28.59  52
Markab         23:05:42.0 +15:18:24  2.5 19.06  40
14 Psc         23:35:07.1 -01:08:37  5.9  1.15  32
PPM 207691     23:34:39.5 -02:08:26  8.0  0.22  33
PPM 207709     23:35:36.7 -02:13:10  9.7  0.10  32
303712         23:35:18.0 -02:17:16 16.0        32
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 4.0 sigma about the mid-time.
The median site spacing is 17.2 km RECON observability=1.0 and success probability=1.2%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Oroville 05:50:00 -46.2 Dark Up 38.3 189.0 Up 05:35:00 - 06:05:00 11090
Tonasket 05:49:59 -46.3 Dark Up 38.5 189.0 Up 05:34:59 - 06:04:59 11074
Okanogan 05:49:58 -46.5 Dark Up 38.9 188.9 Up 05:34:58 - 06:04:58 11056
Brewster 05:50:02 -46.6 Dark Up 39.2 188.7 Up 05:35:02 - 06:05:02 11043
Manson/Chelan 05:50:01 -46.6 Dark Up 39.4 188.2 Up 05:35:01 - 06:05:01 11039
Entiat 05:50:03 -46.8 Dark Up 39.6 188.2 Up 05:35:03 - 06:05:03 11026
Wenatchee 05:50:02 -46.9 Dark Up 39.9 188.1 Up 05:35:02 - 06:05:02 11011
Ellensburg 05:50:04 -47.1 Dark Up 40.3 187.8 Up 05:35:04 - 06:05:04 10989
Yakima 05:50:04 -47.4 Dark Up 40.7 187.9 Up 05:35:04 - 06:05:04 10961
Toppenish/White Swan 05:50:06 -47.6 Dark Up 40.9 188.1 Up 05:35:06 - 06:05:06 10941
Goldendale 05:50:05 -47.8 Dark Up 41.5 187.6 Up 05:35:05 - 06:05:05 10914
The Dalles 05:50:08 -47.8 Dark Up 41.8 187.2 Up 05:35:08 - 06:05:08 10909
Pasco 05:49:59 -48.3 Dark Up 40.9 189.8 Up 05:34:59 - 06:04:59 10893
George/Umatilla 05:50:01 -48.4 Dark Up 41.3 189.5 Up 05:35:01 - 06:05:01 10876
Maupin 05:50:09 -48.1 Dark Up 42.2 187.4 Up 05:35:09 - 06:05:09 10876
PNWRO 05:50:00 -48.6 Dark Up 41.1 190.1 Up 05:35:00 - 06:05:00 10869
Madras/Culver 05:50:10 -48.5 Dark Up 42.7 187.4 Up 05:35:10 - 06:05:10 10838
Sisters 05:50:13 -48.5 Dark Up 43.1 186.8 Up 05:35:13 - 06:05:13 10827
Redmond 05:50:11 -48.7 Dark Up 43.1 187.4 Up 05:35:11 - 06:05:11 10813
Bend 05:50:11 -48.8 Dark Up 43.3 187.2 Up 05:35:11 - 06:05:11 10802
Oregon Observatory 05:50:13 -48.8 Dark Up 43.5 187.1 Up 05:35:13 - 06:05:13 10793
La Pine/Gilchrist 05:50:11 -48.9 Dark Up 43.7 187.0 Up 05:35:11 - 06:05:11 10780
North Lake 05:50:10 -49.5 Dark Up 44.1 187.9 Up 05:35:10 - 06:05:10 10729
Chiloquin 05:50:16 -49.5 Dark Up 44.8 186.6 Up 05:35:16 - 06:05:16 10709
Klamath Falls 05:50:15 -49.7 Dark Up 45.2 186.8 Up 05:35:15 - 06:05:15 10680
Paisley 05:50:10 -50.1 Dark Up 44.6 188.4 Up 05:35:10 - 06:05:10 10676
Tulelake 05:50:13 -50.1 Dark Up 45.4 187.2 Up 05:35:13 - 06:05:13 10650
Lakeview 05:50:10 -50.5 Dark Up 45.1 188.8 Up 05:35:10 - 06:05:10 10631
Fall River/Burney 05:50:16 -50.7 Dark Up 46.3 187.5 Up 05:35:16 - 06:05:16 10578
Cedarville 05:50:10 -51.1 Dark Up 45.7 189.1 Up 05:35:10 - 06:05:10 10575
Susanville 05:50:13 -51.5 Dark Up 46.9 188.6 Up 05:35:13 - 06:05:13 10505
Greenville 05:50:16 -51.5 Dark Up 47.2 188.3 Up 05:35:16 - 06:05:16 10493
Gimple 05:50:13 -51.6 Dark Up 47.2 188.4 Up 05:35:13 - 06:05:13 10490
Quincy 05:50:16 -51.7 Dark Up 47.4 188.3 Up 05:35:16 - 06:05:16 10477
Portola 05:50:14 -52.0 Dark Up 47.4 189.0 Up 05:35:14 - 06:05:14 10451
Reno 05:50:10 -52.6 Dark Up 47.6 190.0 Up 05:35:10 - 06:05:10 10409
Carson City 05:50:11 -52.8 Dark Up 48.0 190.1 Up 05:35:11 - 06:05:11 10379
Gardnerville 05:50:12 -53.0 Dark Up 48.2 190.2 Up 05:35:12 - 06:05:12 10358
Yerington 05:50:09 -53.3 Dark Up 48.1 191.1 Up 05:35:09 - 06:05:09 10342
Hawthorne 05:50:07 -53.9 Dark Up 48.4 192.0 Up 05:35:07 - 06:05:07 10287
Lee Vining 05:50:10 -54.0 Dark Up 49.1 191.4 Up 05:35:10 - 06:05:10 10258
Tonopah 05:50:02 -55.1 Dark Up 48.6 194.1 Up 05:35:02 - 06:05:02 10200
Bishop 05:50:08 -54.8 Dark Up 49.5 192.6 Up 05:35:08 - 06:05:08 10184
Lone Pine 05:50:06 -55.5 Dark Up 50.2 193.3 Up 05:35:06 - 06:05:06 10109
CPSLO 05:50:20 -54.6 Dark Up 51.9 189.6 Up 05:35:20 - 06:05:20 10092
Beatty 05:50:01 -56.1 Dark Up 49.7 195.2 Up 05:35:01 - 06:05:01 10089
Indian Springs 05:49:57 -56.9 Dark Up 49.8 196.9 Up 05:34:57 - 06:04:57 10024
Niwot 05:49:11 -59.1 Dark Up 43.3 209.7 Up 05:34:11 - 06:04:11 9971
Henderson 05:49:54 -57.7 Dark Up 50.1 198.1 Up 05:34:54 - 06:04:54 9954
Wildwood 05:50:14 -56.7 Dark Up 52.8 193.2 Up 05:35:14 - 06:05:14 9916
Searchlight/Boulder City 05:49:57 -58.1 Dark Up 50.6 198.4 Up 05:34:57 - 06:04:57 9903
Laughlin/Bullhead City 05:49:55 -58.6 Dark Up 50.8 199.1 Up 05:34:55 - 06:04:55 9865
Patrick 05:49:50 -58.8 Dark Up 50.4 200.0 Up 05:34:50 - 06:04:50 9861
Kingman/Dolan Springs 05:49:52 -58.8 Dark Up 50.7 199.8 Up 05:34:52 - 06:04:52 9848
Mohave Valley 05:49:54 -58.7 Dark Up 51.1 199.2 Up 05:34:54 - 06:04:54 9841
Idyllwild 05:50:07 -58.2 Dark Up 52.7 196.3 Up 05:35:07 - 06:05:07 9817
DCO 05:49:50 -59.4 Dark Up 50.5 201.2 Up 05:34:50 - 06:04:50 9810
Lake Havasu City 05:49:54 -59.2 Dark Up 51.4 199.7 Up 05:34:54 - 06:04:54 9798
Parker 05:49:55 -59.4 Dark Up 51.7 199.9 Up 05:34:55 - 06:04:55 9766
Blythe 05:49:56 -59.6 Dark Up 52.3 199.7 Up 05:34:56 - 06:04:56 9731
Calipatria 05:50:02 -59.3 Dark Up 53.0 198.4 Up 05:35:02 - 06:05:02 9721
Yuma 05:49:57 -60.1 Dark Up 53.2 200.0 Up 05:34:57 - 06:04:57 9651

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 303712, (2018/10/24 05:52UT)
Object            RA         Dec     mag  sep  mel
Fomalhaut      22:57:39.5 -29:37:23  1.2 28.59  52
Markab         23:04:45.7 +15:12:18  2.5 19.06  40
14 Psc         23:34:09.2 -01:14:51  5.9  1.15  32
PPM 207691     23:33:41.6 -02:14:41  8.0  0.22  33
PPM 207709     23:34:38.7 -02:19:25  9.7  0.10  32
303712         23:34:20.0 -02:23:30 16.0        32
Positions are for J2000

Event circumstances last updated at 2017/12/05 19:00:53 UT

Marc W. Buie, Southwest Research Institute

RECON