RECON: TNO occultation with 307261

Event between (307261) 02MS4 and star GA0820:11190979 with event index number of 339932

Geocentric closest approach at 2019/10/10 02:13:02 UTC

J2000 position of star is 18:42:00.8 -06:49:11
Equinox of date position of star is 18:43:03.6 -06:47:59
Stellar brightness G=14.6, use SENSEUP=128
Star is 57 degrees from the moon. Moon is 87% illuminated.
TNO apparent brightness V=20.4

[RECON map]
TNO is 46.6 AU from the Sun and 46.6 AU from the Earth.
The TNO is moving 10.7 km/sec on the sky relative to the star, or, 1.1 arcsec/hr.
The 1-sigma error in the time of the event is 280 seconds.
The 1-sigma cross-track error in the shadow position is 4218 km.
The sky-plane scale is 33832.7 km/arcsec.

The TNO has an absolute magnitude Hv=3.6
Diameter=1148.2 km assuming a 5% albedo -- 107.5 sec chord
Diameter=468.7 km assuming a 30% albedo -- 43.9 sec chord
Dynamical classification is SCATEXTD
 
 
 
 
 
 

Star training set for 307261, (2019/10/10 02:13UT)
Object            RA         Dec     mag  sep  mel
Antares        16:30:37.4 -26:28:27  0.9 37.13  85
60Bet Oph      17:44:27.0 +04:33:38  2.8 18.52  74
PPM 202054     18:43:40.1 -07:03:11  6.5  0.29  57
PPM 202047     18:43:25.0 -06:47:06  9.5  0.09  57
307261         18:43:04.7 -06:47:58 14.6        57
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 3.2 sigma about the mid-time.
The median site spacing is 0.0 km RECON observability=0.0 and success probability=0.0%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Niwot 02:10:21 -19.9 Dark Up 37.6 212.4 Up 01:55:21 - 02:25:21 10459
SwRI 02:10:18 -19.8 Dark Up 37.7 212.3 Up 01:55:18 - 02:25:18 10450
Kelowna 02:08:04 -8.7 NT Up 32.5 192.4 Up 01:53:04 - 02:23:04 10097
Penticton 02:08:08 -8.6 NT Up 32.9 192.3 Up 01:53:08 - 02:23:08 10076
Summerland 02:08:01 -8.5 NT Up 32.9 192.1 Up 01:53:01 - 02:23:01 10073
Okanagan Falls 02:08:05 -8.6 NT Up 33.1 192.3 Up 01:53:05 - 02:23:05 10068
Anarchist Mountain Observatory 02:08:08 -8.7 NT Up 33.4 192.6 Up 01:53:08 - 02:23:08 10066
Oliver 02:08:08 -8.6 NT Up 33.3 192.3 Up 01:53:08 - 02:23:08 10063
Oroville 02:08:11 -8.7 NT Up 33.5 192.5 Up 01:53:11 - 02:23:11 10060
Tonasket 02:08:08 -8.7 NT Up 33.7 192.6 Up 01:53:08 - 02:23:08 10052
Okanogan 02:08:10 -8.6 NT Up 34.1 192.4 Up 01:53:10 - 02:23:10 10033
Brewster 02:08:11 -8.5 NT Up 34.4 192.2 Up 01:53:11 - 02:23:11 10013
Manson/Chelan 02:08:09 -8.2 NT Up 34.6 191.8 Up 01:53:09 - 02:23:09 9987
PNWRO 02:08:25 -9.1 NT Up 36.3 193.7 Up 01:53:25 - 02:23:25 9978
Pasco 02:08:22 -8.9 NT Up 36.1 193.4 Up 01:53:22 - 02:23:22 9976
Entiat 02:08:10 -8.2 NT Up 34.8 191.8 Up 01:53:10 - 02:23:10 9975
Wenatchee 02:08:09 -8.1 NT Up 35.1 191.7 Up 01:53:09 - 02:23:09 9960
George/Umatilla 02:08:22 -8.8 NT Up 36.4 193.2 Up 01:53:22 - 02:23:22 9952
Ellensburg 02:08:09 -7.9 NT Up 35.5 191.5 Up 01:53:09 - 02:23:09 9933
Toppenish/White Swan 02:08:12 -8.0 NT Up 36.1 191.8 Up 01:53:12 - 02:23:12 9917
Yakima 02:08:13 -7.9 NT Up 35.9 191.5 Up 01:53:13 - 02:23:13 9916
Goldendale 02:08:16 -7.7 NT Up 36.7 191.4 Up 01:53:16 - 02:23:16 9872
The Dalles 02:08:12 -7.5 NT Up 37.0 190.9 Up 01:53:12 - 02:23:12 9844
Maupin 02:08:18 -7.6 NT Up 37.4 191.1 Up 01:53:18 - 02:23:18 9832
DCO 02:10:01 -14.0 AT Up 45.0 204.6 Up 01:55:01 - 02:25:01 9822
Madras/Culver 02:08:20 -7.5 NT Up 37.9 191.2 Up 01:53:20 - 02:23:20 9807
Patrick 02:09:55 -13.4 AT Up 45.0 203.5 Up 01:54:55 - 02:24:55 9795
Redmond 02:08:22 -7.5 NT Up 38.3 191.2 Up 01:53:22 - 02:23:22 9789
Kingman/Dolan Springs 02:10:00 -13.2 AT Up 45.3 203.4 Up 01:55:00 - 02:25:00 9774
Bend 02:08:25 -7.4 NT Up 38.5 191.1 Up 01:53:25 - 02:23:25 9772
Sisters 02:08:20 -7.2 NT Up 38.3 190.7 Up 01:53:20 - 02:23:20 9768
Henderson 02:09:46 -12.4 AT Up 44.8 201.7 Up 01:54:46 - 02:24:46 9761
North Lake 02:08:26 -7.6 NT Up 39.3 191.7 Up 01:53:26 - 02:23:26 9759
Oregon Observatory 02:08:22 -7.3 NT Up 38.7 190.9 Up 01:53:22 - 02:23:22 9757
Paisley 02:08:34 -7.9 NT Up 39.7 192.3 Up 01:53:34 - 02:23:34 9754
Indian Springs 02:09:36 -11.8 NT Up 44.5 200.6 Up 01:54:36 - 02:24:36 9746
La Pine/Gilchrist 02:08:25 -7.2 NT Up 38.9 190.9 Up 01:53:25 - 02:23:25 9745
Laughlin/Bullhead City 02:09:57 -12.8 AT Up 45.4 202.7 Up 01:54:57 - 02:24:57 9743
Lakeview 02:08:36 -8.1 NT Up 40.2 192.6 Up 01:53:36 - 02:23:36 9742
Searchlight/Boulder City 02:09:48 -12.5 AT Up 45.3 202.1 Up 01:54:48 - 02:24:48 9737
Mohave Valley 02:09:53 -12.8 AT Up 45.7 202.8 Up 01:54:53 - 02:24:53 9730
Tonopah 02:09:18 -10.5 NT Up 43.5 198.0 Up 01:54:18 - 02:24:18 9728
Lake Havasu City 02:09:58 -13.0 AT Up 46.0 203.3 Up 01:54:58 - 02:24:58 9725
Cedarville 02:08:39 -8.2 NT Up 40.8 193.0 Up 01:53:39 - 02:23:39 9722
Parker 02:10:00 -13.1 AT Up 46.3 203.5 Up 01:55:00 - 02:25:00 9709
Beatty 02:09:29 -10.9 NT Up 44.5 199.0 Up 01:54:29 - 02:24:29 9699
Chiloquin 02:08:29 -6.9 NT Up 40.1 190.6 Up 01:53:29 - 02:23:29 9676
Hawthorne 02:09:08 -9.4 NT Up 43.4 195.9 Up 01:54:08 - 02:24:08 9669
Tulelake 02:08:32 -7.2 NT Up 40.6 191.2 Up 01:53:32 - 02:23:32 9669
Blythe 02:10:04 -12.8 AT Up 46.9 203.3 Up 01:55:04 - 02:25:04 9666
Klamath Falls 02:08:25 -7.0 NT Up 40.4 190.7 Up 01:53:25 - 02:23:25 9665
Yerington 02:09:00 -9.0 NT Up 43.1 195.0 Up 01:54:00 - 02:24:00 9661
Reno 02:08:57 -8.5 NT Up 42.7 194.0 Up 01:53:57 - 02:23:57 9650
Susanville 02:08:43 -7.8 NT Up 42.0 192.6 Up 01:53:43 - 02:23:43 9644
Carson City 02:08:57 -8.5 NT Up 43.0 194.1 Up 01:53:57 - 02:23:57 9634
Fall River/Burney 02:08:36 -7.2 NT Up 41.5 191.5 Up 01:53:36 - 02:23:36 9631
Bishop 02:09:21 -9.6 NT Up 44.5 196.6 Up 01:54:21 - 02:24:21 9627
Portola 02:08:46 -7.9 NT Up 42.5 193.0 Up 01:53:46 - 02:23:46 9625
Gardnerville 02:08:57 -8.5 NT Up 43.2 194.2 Up 01:53:57 - 02:23:57 9625
Gimple 02:08:41 -7.6 NT Up 42.3 192.4 Up 01:53:41 - 02:23:41 9618
Yuma 02:10:07 -12.8 AT Up 47.7 203.7 Up 01:55:07 - 02:25:07 9616
Lee Vining 02:09:05 -9.0 NT Up 44.1 195.4 Up 01:54:05 - 02:24:05 9614
Greenville 02:08:46 -7.6 NT Up 42.3 192.3 Up 01:53:46 - 02:23:46 9614
Lone Pine 02:09:22 -9.9 NT Up 45.1 197.3 Up 01:54:22 - 02:24:22 9609
Quincy 02:08:43 -7.6 NT Up 42.5 192.3 Up 01:53:43 - 02:23:43 9604
Calipatria 02:09:58 -12.1 AT Up 47.6 202.2 Up 01:54:58 - 02:24:58 9584
Idyllwild 02:09:50 -11.0 NT Up 47.4 200.3 Up 01:54:50 - 02:24:50 9545
Wildwood 02:09:32 -9.4 NT Up 47.6 197.4 Up 01:54:32 - 02:24:32 9449
CPSLO 02:09:11 -7.7 NT Up 46.9 193.9 Up 01:54:11 - 02:24:11 9388

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 307261, (2019/10/10 02:13UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9 37.13  85
60Bet Oph      17:43:28.3 +04:34:05  2.8 18.52  74
PPM 202054     18:42:36.1 -07:04:26  6.5  0.29  57
PPM 202047     18:42:21.1 -06:48:20  9.5  0.09  57
307261         18:42:00.8 -06:49:11 14.6        57
Positions are for J2000

Event circumstances last updated at 2019/06/07 22:44:28 UT

Marc W. Buie, Southwest Research Institute

RECON