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 23:35:13.5 -02:17:44
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 181 seconds.
The 1-sigma cross-track error in the shadow position is 2831 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      22:58:41.1 -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 5.0 sigma about the mid-time.
The median site spacing is 17.5 km RECON observability=1.0 and success probability=0.5%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Oroville 05:49:58 -46.2 Dark Up 38.3 189.0 Up 05:34:58 - 06:04:58 11082
Tonasket 05:49:59 -46.3 Dark Up 38.5 189.0 Up 05:34:59 - 06:04:59 11066
Okanogan 05:49:58 -46.5 Dark Up 38.9 188.9 Up 05:34:58 - 06:04:58 11047
Brewster 05:50:00 -46.6 Dark Up 39.2 188.7 Up 05:35:00 - 06:05:00 11035
Manson/Chelan 05:50:03 -46.6 Dark Up 39.4 188.2 Up 05:35:03 - 06:05:03 11031
Entiat 05:50:02 -46.7 Dark Up 39.6 188.2 Up 05:35:02 - 06:05:02 11018
Wenatchee 05:50:01 -46.9 Dark Up 39.9 188.1 Up 05:35:01 - 06:05:01 11003
Ellensburg 05:50:04 -47.1 Dark Up 40.3 187.8 Up 05:35:04 - 06:05:04 10981
Yakima 05:50:03 -47.4 Dark Up 40.7 187.9 Up 05:35:03 - 06:05:03 10953
Toppenish/White Swan 05:50:03 -47.6 Dark Up 40.9 188.1 Up 05:35:03 - 06:05:03 10932
Goldendale 05:50:06 -47.8 Dark Up 41.5 187.6 Up 05:35:06 - 06:05:06 10906
The Dalles 05:50:07 -47.8 Dark Up 41.8 187.2 Up 05:35:07 - 06:05:07 10901
Pasco 05:50:00 -48.3 Dark Up 40.9 189.8 Up 05:35:00 - 06:05:00 10885
George/Umatilla 05:50:00 -48.4 Dark Up 41.3 189.5 Up 05:35:00 - 06:05:00 10867
Maupin 05:50:10 -48.1 Dark Up 42.2 187.4 Up 05:35:10 - 06:05:10 10867
PNWRO 05:49:57 -48.6 Dark Up 41.1 190.1 Up 05:34:57 - 06:04:57 10860
Madras/Culver 05:50:08 -48.5 Dark Up 42.7 187.4 Up 05:35:08 - 06:05:08 10829
Sisters 05:50:10 -48.5 Dark Up 43.1 186.8 Up 05:35:10 - 06:05:10 10819
Redmond 05:50:08 -48.7 Dark Up 43.1 187.4 Up 05:35:08 - 06:05:08 10805
Bend 05:50:11 -48.8 Dark Up 43.3 187.2 Up 05:35:11 - 06:05:11 10794
Oregon Observatory 05:50:11 -48.8 Dark Up 43.5 187.0 Up 05:35:11 - 06:05:11 10785
La Pine/Gilchrist 05:50:13 -48.9 Dark Up 43.7 187.0 Up 05:35:13 - 06:05:13 10772
North Lake 05:50:08 -49.5 Dark Up 44.1 187.9 Up 05:35:08 - 06:05:08 10721
Chiloquin 05:50:14 -49.5 Dark Up 44.8 186.6 Up 05:35:14 - 06:05:14 10701
Klamath Falls 05:50:16 -49.7 Dark Up 45.2 186.8 Up 05:35:16 - 06:05:16 10672
Paisley 05:50:09 -50.1 Dark Up 44.6 188.4 Up 05:35:09 - 06:05:09 10668
Tulelake 05:50:14 -50.1 Dark Up 45.4 187.3 Up 05:35:14 - 06:05:14 10642
Lakeview 05:50:08 -50.5 Dark Up 45.1 188.8 Up 05:35:08 - 06:05:08 10623
Fall River/Burney 05:50:15 -50.7 Dark Up 46.3 187.5 Up 05:35:15 - 06:05:15 10570
Cedarville 05:50:09 -51.1 Dark Up 45.7 189.1 Up 05:35:09 - 06:05:09 10567
Susanville 05:50:12 -51.5 Dark Up 46.9 188.6 Up 05:35:12 - 06:05:12 10496
Greenville 05:50:14 -51.5 Dark Up 47.2 188.3 Up 05:35:14 - 06:05:14 10484
Gimple 05:50:14 -51.6 Dark Up 47.2 188.4 Up 05:35:14 - 06:05:14 10482
Quincy 05:50:13 -51.7 Dark Up 47.4 188.3 Up 05:35:13 - 06:05:13 10469
Portola 05:50:13 -52.0 Dark Up 47.4 189.0 Up 05:35:13 - 06:05:13 10443
Reno 05:50:11 -52.6 Dark Up 47.6 190.0 Up 05:35:11 - 06:05:11 10400
Carson City 05:50:11 -52.8 Dark Up 48.0 190.1 Up 05:35:11 - 06:05:11 10371
Gardnerville 05:50:11 -53.0 Dark Up 48.2 190.2 Up 05:35:11 - 06:05:11 10349
Yerington 05:50:10 -53.3 Dark Up 48.1 191.1 Up 05:35:10 - 06:05:10 10333
Hawthorne 05:50:07 -53.9 Dark Up 48.4 192.0 Up 05:35:07 - 06:05:07 10278
Lee Vining 05:50:09 -54.0 Dark Up 49.1 191.4 Up 05:35:09 - 06:05:09 10249
Tonopah 05:50:03 -55.1 Dark Up 48.6 194.2 Up 05:35:03 - 06:05:03 10192
Bishop 05:50:07 -54.8 Dark Up 49.5 192.6 Up 05:35:07 - 06:05:07 10174
Lone Pine 05:50:07 -55.5 Dark Up 50.2 193.3 Up 05:35:07 - 06:05:07 10100
CPSLO 05:50:20 -54.6 Dark Up 51.9 189.6 Up 05:35:20 - 06:05:20 10082
Beatty 05:50:00 -56.1 Dark Up 49.7 195.2 Up 05:35:00 - 06:05:00 10079
Indian Springs 05:49:57 -56.9 Dark Up 49.8 196.9 Up 05:34:57 - 06:04:57 10014
Niwot 05:49:10 -59.1 Dark Up 43.3 209.7 Up 05:34:10 - 06:04:10 9963
Henderson 05:49:54 -57.7 Dark Up 50.1 198.1 Up 05:34:54 - 06:04:54 9944
Wildwood 05:50:14 -56.7 Dark Up 52.8 193.2 Up 05:35:14 - 06:05:14 9906
Searchlight/Boulder City 05:49:55 -58.1 Dark Up 50.6 198.4 Up 05:34:55 - 06:04:55 9893
Laughlin/Bullhead City 05:49:55 -58.6 Dark Up 50.8 199.1 Up 05:34:55 - 06:04:55 9855
Patrick 05:49:51 -58.8 Dark Up 50.4 200.0 Up 05:34:51 - 06:04:51 9851
Kingman/Dolan Springs 05:49:52 -58.8 Dark Up 50.7 199.8 Up 05:34:52 - 06:04:52 9839
Mohave Valley 05:49:55 -58.7 Dark Up 51.1 199.2 Up 05:34:55 - 06:04:55 9831
Idyllwild 05:50:06 -58.2 Dark Up 52.7 196.3 Up 05:35:06 - 06:05:06 9808
DCO 05:49:48 -59.4 Dark Up 50.5 201.2 Up 05:34:48 - 06:04:48 9800
Lake Havasu City 05:49:52 -59.2 Dark Up 51.4 199.7 Up 05:34:52 - 06:04:52 9788
Parker 05:49:55 -59.4 Dark Up 51.7 199.9 Up 05:34:55 - 06:04:55 9756
Blythe 05:49:55 -59.6 Dark Up 52.3 199.7 Up 05:34:55 - 06:04:55 9720
Calipatria 05:49:59 -59.3 Dark Up 53.0 198.4 Up 05:34:59 - 06:04:59 9711
Yuma 05:49:56 -60.1 Dark Up 53.2 200.0 Up 05:34:56 - 06:04:56 9640

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         23:34:09.1 -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 2017/05/19 18:04:51 UT

Marc W. Buie, Southwest Research Institute

RECON