RECON: TNO occultation with 12UE178

Event between 12UE178 and star GA1100:00677843 with event index number of 249316

Geocentric closest approach at 2019/12/18 07:21:55 UTC

J2000 position of star is 04:39:37.9 +20:47:17
Equinox of date position of star is 04:40:45.7 +20:49:28
Stellar brightness G=15.8, use SENSEUP=128
Star is 93 degrees from the moon. Moon is 60% illuminated.
TNO apparent brightness V=22.7

[RECON map]
TNO is 45.5 AU from the Sun and 44.5 AU from the Earth.
The TNO is moving 25.0 km/sec on the sky relative to the star, or, 2.8 arcsec/hr.
The 1-sigma error in the time of the event is 940 seconds.
The 1-sigma cross-track error in the shadow position is 5620 km.
The sky-plane scale is 32303.9 km/arcsec.

The TNO has an absolute magnitude Hv=6.1
Diameter=364.8 km assuming a 5% albedo -- 14.6 sec chord
Diameter=148.9 km assuming a 30% albedo -- 6.0 sec chord
Dynamical classification is CLASSICAL
 
 
 
 
 
 

Star training set for 12UE178, (2019/12/18 07:22UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:37:04.1 +16:32:52  0.8  4.37  95
3Iot Aur       04:58:17.8 +33:11:45  2.7 12.96  87
PPM 093646     04:39:26.6 +20:43:24  5.9  0.34  93
PPM 093627     04:37:29.0 +21:43:42  8.5  1.19  94
PPM 093673     04:41:20.4 +20:35:09  8.9  0.27  93
PPM 093652     04:40:03.0 +20:49:09 10.1  0.18  93
12UE178        04:40:48.8 +20:49:34 15.8        93
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 1.0 sigma about the mid-time.
The median site spacing is 22.7 km RECON observability=1.0 and success probability=6.0%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Kelowna 07:21:20 -62.7 Dark Up 60.3 194.6 Up 07:06:20 - 07:36:20 -6351
Summerland 07:21:21 -62.7 Dark Up 60.4 193.9 Up 07:06:21 - 07:36:21 -6354
Penticton 07:21:21 -63.0 Dark Up 60.6 194.4 Up 07:06:21 - 07:36:21 -6386
Okanagan Falls 07:21:20 -63.2 Dark Up 60.8 194.4 Up 07:06:20 - 07:36:20 -6404
Oliver 07:21:21 -63.4 Dark Up 61.0 194.6 Up 07:06:21 - 07:36:21 -6421
Anarchist Mountain Observatory 07:21:20 -63.6 Dark Up 61.1 195.0 Up 07:06:20 - 07:36:20 -6438
Oroville 07:21:20 -63.6 Dark Up 61.2 194.9 Up 07:06:20 - 07:36:20 -6445
Tonasket 07:21:20 -63.9 Dark Up 61.4 195.0 Up 07:06:20 - 07:36:20 -6468
Okanogan 07:21:21 -64.2 Dark Up 61.8 194.9 Up 07:06:21 - 07:36:21 -6501
Brewster 07:21:21 -64.4 Dark Up 62.1 194.6 Up 07:06:21 - 07:36:21 -6527
Manson/Chelan 07:21:21 -64.5 Dark Up 62.3 194.0 Up 07:06:21 - 07:36:21 -6545
Entiat 07:21:22 -64.7 Dark Up 62.6 194.0 Up 07:06:22 - 07:36:22 -6567
Wenatchee 07:21:23 -64.9 Dark Up 62.8 193.9 Up 07:06:23 - 07:36:23 -6592
Ellensburg 07:21:23 -65.2 Dark Up 63.3 193.6 Up 07:06:23 - 07:36:23 -6632
Yakima 07:21:23 -65.6 Dark Up 63.7 193.8 Up 07:06:23 - 07:36:23 -6672
Toppenish/White Swan 07:21:23 -65.9 Dark Up 63.8 194.3 Up 07:06:23 - 07:36:23 -6695
Pasco 07:21:19 -66.3 Dark Up 63.7 196.9 Up 07:06:19 - 07:36:19 -6714
PNWRO 07:21:18 -66.5 Dark Up 63.9 197.5 Up 07:06:18 - 07:36:18 -6740
George/Umatilla 07:21:20 -66.5 Dark Up 64.1 196.7 Up 07:06:20 - 07:36:20 -6747
Goldendale 07:21:25 -66.3 Dark Up 64.4 193.6 Up 07:06:25 - 07:36:25 -6748
The Dalles 07:21:26 -66.4 Dark Up 64.7 193.0 Up 07:06:26 - 07:36:26 -6769
Maupin 07:21:25 -66.8 Dark Up 65.1 193.4 Up 07:06:25 - 07:36:25 -6812
Madras/Culver 07:21:26 -67.3 Dark Up 65.7 193.6 Up 07:06:26 - 07:36:26 -6867
Sisters 07:21:27 -67.4 Dark Up 66.1 192.8 Up 07:06:27 - 07:36:27 -6898
Redmond 07:21:26 -67.6 Dark Up 66.0 193.7 Up 07:06:26 - 07:36:26 -6903
Bend 07:21:26 -67.7 Dark Up 66.2 193.5 Up 07:06:26 - 07:36:26 -6924
Oregon Observatory 07:21:26 -67.9 Dark Up 66.4 193.3 Up 07:06:26 - 07:36:26 -6941
La Pine/Gilchrist 07:21:27 -68.0 Dark Up 66.6 193.2 Up 07:06:27 - 07:36:27 -6961
North Lake 07:21:24 -68.6 Dark Up 67.0 194.9 Up 07:06:24 - 07:36:24 -7010
Paisley 07:21:23 -69.2 Dark Up 67.4 196.1 Up 07:06:23 - 07:36:23 -7069
Chiloquin 07:21:28 -68.9 Dark Up 67.8 193.0 Up 07:06:28 - 07:36:28 -7073
Klamath Falls 07:21:28 -69.2 Dark Up 68.1 193.4 Up 07:06:28 - 07:36:28 -7109
Lakeview 07:21:24 -69.7 Dark Up 67.9 196.9 Up 07:06:24 - 07:36:24 -7123
Tulelake 07:21:27 -69.6 Dark Up 68.3 194.3 Up 07:06:27 - 07:36:27 -7139
Cedarville 07:21:22 -70.4 Dark Up 68.5 197.8 Up 07:06:22 - 07:36:22 -7192
Fall River/Burney 07:21:26 -70.4 Dark Up 69.2 195.1 Up 07:06:26 - 07:36:26 -7234
Susanville 07:21:25 -71.2 Dark Up 69.6 197.5 Up 07:06:25 - 07:36:25 -7305
Greenville 07:21:25 -71.4 Dark Up 70.0 196.9 Up 07:06:25 - 07:36:25 -7332
Gimple 07:21:26 -71.4 Dark Up 69.9 197.1 Up 07:06:26 - 07:36:26 -7333
Quincy 07:21:26 -71.5 Dark Up 70.1 197.1 Up 07:06:26 - 07:36:26 -7353
Portola 07:21:24 -71.8 Dark Up 70.2 198.4 Up 07:06:24 - 07:36:24 -7370
Niwot 07:20:34 -72.5 Dark Up 63.3 230.2 Up 07:05:34 - 07:35:34 -7374
SwRI 07:20:36 -72.7 Dark Up 63.4 230.2 Up 07:05:36 - 07:35:36 -7385
Reno 07:21:22 -72.3 Dark Up 70.2 200.4 Up 07:06:22 - 07:36:22 -7402
Carson City 07:21:22 -72.6 Dark Up 70.6 200.8 Up 07:06:22 - 07:36:22 -7440
Yerington 07:21:21 -73.0 Dark Up 70.6 202.7 Up 07:06:21 - 07:36:21 -7464
Gardnerville 07:21:22 -72.8 Dark Up 70.8 201.2 Up 07:06:22 - 07:36:22 -7466
Hawthorne 07:21:18 -73.6 Dark Up 70.8 204.6 Up 07:06:18 - 07:36:18 -7516
Tonopah 07:21:13 -74.5 Dark Up 70.8 208.9 Up 07:06:13 - 07:36:13 -7573
Lee Vining 07:21:21 -73.9 Dark Up 71.5 204.0 Up 07:06:21 - 07:36:21 -7573
Bishop 07:21:17 -74.7 Dark Up 71.8 206.7 Up 07:06:17 - 07:36:17 -7641
Beatty 07:21:12 -75.7 Dark Up 71.6 211.8 Up 07:06:12 - 07:36:12 -7699
Lone Pine 07:21:17 -75.5 Dark Up 72.4 208.8 Up 07:06:17 - 07:36:17 -7724
Indian Springs 07:21:08 -76.3 Dark Up 71.4 215.1 Up 07:06:08 - 07:36:08 -7738
Henderson 07:21:06 -76.9 Dark Up 71.5 217.8 Up 07:06:06 - 07:36:06 -7798
CPSLO 07:21:25 -75.6 Dark Up 74.4 202.9 Up 07:06:25 - 07:36:25 -7847
Searchlight/Boulder City 07:21:05 -77.5 Dark Up 71.9 219.0 Up 07:06:05 - 07:36:05 -7860
Patrick 07:21:02 -77.7 Dark Up 71.4 221.7 Up 07:06:02 - 07:36:02 -7870
Kingman/Dolan Springs 07:21:03 -77.9 Dark Up 71.7 221.7 Up 07:06:03 - 07:36:03 -7893
Laughlin/Bullhead City 07:21:04 -77.8 Dark Up 72.0 220.4 Up 07:06:04 - 07:36:04 -7894
DCO 07:20:59 -78.1 Dark Up 71.2 223.9 Up 07:05:59 - 07:35:59 -7905
Mohave Valley 07:21:04 -78.1 Dark Up 72.2 221.0 Up 07:06:04 - 07:36:04 -7923
Lake Havasu City 07:21:03 -78.6 Dark Up 72.3 222.4 Up 07:06:03 - 07:36:03 -7967
Wildwood 07:21:18 -77.5 Dark Up 74.7 211.4 Up 07:06:18 - 07:36:18 -7991
Parker 07:21:04 -78.9 Dark Up 72.6 223.3 Up 07:06:04 - 07:36:04 -8005
Idyllwild 07:21:12 -78.6 Dark Up 74.2 217.8 Up 07:06:12 - 07:36:12 -8040
Blythe 07:21:04 -79.3 Dark Up 73.1 223.7 Up 07:06:04 - 07:36:04 -8061
Calipatria 07:21:08 -79.5 Dark Up 74.0 222.4 Up 07:06:08 - 07:36:08 -8111
Yuma 07:21:05 -80.2 Dark Up 73.8 225.8 Up 07:06:05 - 07:36:05 -8162

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 12UE178, (2019/12/18 07:22UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:35:55.3 +16:30:30  0.8  4.37  95
3Iot Aur       04:56:59.6 +33:09:58  2.7 12.96  87
PPM 093646     04:38:15.8 +20:41:05  5.9  0.34  93
PPM 093627     04:36:17.7 +21:41:20  8.5  1.19  94
PPM 093673     04:40:09.6 +20:32:54  8.9  0.27  93
PPM 093652     04:38:52.1 +20:46:51 10.1  0.18  93
12UE178        04:39:37.9 +20:47:17 15.8        93
Positions are for J2000

Event circumstances last updated at 2019/01/30 20:45:12 UT

Marc W. Buie, Southwest Research Institute

RECON