RECON: TNO occultation with 54598

Event between (54598) Bienor and star UC4-668-024120 with event index number of 225237

Geocentric closest approach at 2019/11/17 08:26:35 UTC

J2000 position of star is 04:09:20.5 +43:35:33
Equinox of date position of star is 04:10:37.3 +43:38:22
Stellar brightness R=15.8, use SENSEUP=128
Star is 47 degrees from the moon. Moon is 77% illuminated.
TNO apparent brightness V=19.2

[RECON map]
TNO is 14.5 AU from the Sun and 13.6 AU from the Earth.
The TNO is moving 21.3 km/sec on the sky relative to the star, or, 7.8 arcsec/hr.
The 1-sigma error in the time of the event is 38 seconds.
The 1-sigma cross-track error in the shadow position is 517 km.
The sky-plane scale is 9869.8 km/arcsec.

The TNO has an absolute magnitude Hv=7.5
Diameter=190.6 km assuming a 5% albedo -- 9.0 sec chord
Diameter=77.8 km assuming a 30% albedo -- 3.7 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 

Star training set for 54598, (2019/11/17 08:27UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:37:03.8 +16:32:52  0.8 27.67  43
Mirphak        03:25:45.1 +49:55:49  1.8  9.92  56
PPM 046963     04:19:31.0 +42:11:18  6.1  2.17  46
PPM 046827     04:10:04.9 +43:44:09  8.2  0.15  47
54598          04:10:44.1 +43:38:37 15.8        47
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 25.0 km RECON observability=1.0 and success probability=26.7%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Oroville 08:26:31 -58.7 Dark Up 84.6 187.5 Up 08:22:53 - 08:30:10 2261
Tonasket 08:26:31 -58.9 Dark Up 84.8 187.9 Up 08:22:53 - 08:30:10 2236
Okanogan 08:26:32 -59.3 Dark Up 85.2 187.2 Up 08:22:53 - 08:30:10 2199
Brewster 08:26:32 -59.6 Dark Up 85.5 185.8 Up 08:22:54 - 08:30:11 2170
Manson/Chelan 08:26:34 -59.9 Dark Up 85.7 182.5 Up 08:22:55 - 08:30:12 2149
Entiat 08:26:34 -60.1 Dark Up 85.9 182.0 Up 08:22:56 - 08:30:13 2125
Wenatchee 08:26:35 -60.4 Dark Up 86.2 181.0 Up 08:22:56 - 08:30:13 2097
Ellensburg 08:26:35 -60.8 Dark Up 86.6 178.5 Up 08:22:57 - 08:30:14 2053
Yakima 08:26:36 -61.2 Dark Up 87.0 178.1 Up 08:22:57 - 08:30:14 2008
Toppenish/White Swan 08:26:35 -61.3 Dark Up 87.2 180.5 Up 08:22:57 - 08:30:14 1983
Pasco 08:26:31 -61.1 Dark Up 87.2 199.3 Up 08:22:52 - 08:30:09 1963
PNWRO 08:26:30 -61.3 Dark Up 87.4 204.5 Up 08:22:52 - 08:30:09 1934
George/Umatilla 08:26:32 -61.5 Dark Up 87.6 198.4 Up 08:22:53 - 08:30:10 1927
Goldendale 08:26:37 -62.0 Dark Up 87.8 172.8 Up 08:22:59 - 08:30:16 1924
The Dalles 08:26:39 -62.3 Dark Up 87.9 164.8 Up 08:23:00 - 08:30:17 1902
Maupin 08:26:38 -62.6 Dark Up 88.3 163.6 Up 08:23:00 - 08:30:17 1855
Madras/Culver 08:26:39 -63.2 Dark Up 88.9 154.4 Up 08:23:00 - 08:30:17 1795
Sisters 08:26:40 -63.6 Dark Up 88.9 130.5 Up 08:23:02 - 08:30:19 1761
Redmond 08:26:39 -63.5 Dark Up 89.1 142.0 Up 08:23:01 - 08:30:18 1755
Bend 08:26:39 -63.7 Dark Up 89.2 126.2 Up 08:23:01 - 08:30:18 1733
Oregon Observatory 08:26:40 -63.9 Dark Up 89.2 111.7 Up 08:23:02 - 08:30:19 1714
La Pine/Gilchrist 08:26:40 -64.1 Dark Up 89.2 96.1 Up 08:23:02 - 08:30:19 1692
North Lake 08:26:39 -64.4 Dark Up 89.5 43.9 Up 08:23:00 - 08:30:17 1640
Paisley 08:26:37 -64.8 Dark Up 89.1 5.0 Up 08:22:59 - 08:30:16 1576
Chiloquin 08:26:43 -65.3 Dark Up 88.5 44.6 Up 08:23:04 - 08:30:21 1572
Klamath Falls 08:26:42 -65.6 Dark Up 88.3 35.0 Up 08:23:04 - 08:30:21 1533
Lakeview 08:26:37 -65.2 Dark Up 88.6 357.6 Up 08:22:58 - 08:30:15 1519
Tulelake 08:26:41 -65.7 Dark Up 88.2 24.4 Up 08:23:03 - 08:30:20 1501
Cedarville 08:26:36 -65.8 Dark Up 87.9 354.8 Up 08:22:58 - 08:30:15 1445
Fall River/Burney 08:26:41 -66.6 Dark Up 87.4 15.1 Up 08:23:03 - 08:30:20 1400
Susanville 08:26:39 -66.9 Dark Up 86.8 2.8 Up 08:23:00 - 08:30:17 1325
Niwot 08:25:38 -59.8 Dark Up 78.3 292.2 Up 08:21:59 - 08:29:16 1307
Greenville 08:26:40 -67.3 Dark Up 86.5 6.1 Up 08:23:01 - 08:30:18 1297
Gimple 08:26:39 -67.3 Dark Up 86.5 5.1 Up 08:23:01 - 08:30:18 1296
Quincy 08:26:40 -67.5 Dark Up 86.3 5.7 Up 08:23:01 - 08:30:18 1274
Portola 08:26:38 -67.4 Dark Up 86.2 0.3 Up 08:23:00 - 08:30:17 1257
Reno 08:26:36 -67.4 Dark Up 85.9 353.8 Up 08:22:57 - 08:30:14 1224
Carson City 08:26:36 -67.8 Dark Up 85.6 354.1 Up 08:22:57 - 08:30:14 1184
Yerington 08:26:33 -67.7 Dark Up 85.3 348.8 Up 08:22:55 - 08:30:12 1159
Gardnerville 08:26:35 -68.0 Dark Up 85.3 354.0 Up 08:22:57 - 08:30:14 1157
Hawthorne 08:26:31 -67.9 Dark Up 84.8 345.8 Up 08:22:53 - 08:30:10 1105
Tonopah 08:26:26 -67.7 Dark Up 84.0 337.6 Up 08:22:47 - 08:30:04 1047
Lee Vining 08:26:33 -68.6 Dark Up 84.3 350.5 Up 08:22:55 - 08:30:12 1045
Bishop 08:26:31 -68.8 Dark Up 83.6 346.8 Up 08:22:52 - 08:30:09 975
Beatty 08:26:24 -68.4 Dark Up 82.8 338.7 Up 08:22:46 - 08:30:03 918
Lone Pine 08:26:29 -69.3 Dark Up 82.8 346.4 Up 08:22:51 - 08:30:08 890
Indian Springs 08:26:20 -68.1 Dark Up 82.1 334.4 Up 08:22:41 - 08:29:58 880
Henderson 08:26:17 -68.2 Dark Up 81.4 333.1 Up 08:22:38 - 08:29:55 820
CPSLO 08:26:41 -71.5 Dark Up 81.7 1.1 Up 08:23:02 - 08:30:19 763
Searchlight/Boulder City 08:26:17 -68.6 Dark Up 80.9 334.4 Up 08:22:38 - 08:29:55 757
Patrick 08:26:12 -68.0 Dark Up 80.4 330.6 Up 08:22:34 - 08:29:51 750
Kingman/Dolan Springs 08:26:13 -68.3 Dark Up 80.3 331.9 Up 08:22:35 - 08:29:52 726
Laughlin/Bullhead City 08:26:15 -68.6 Dark Up 80.5 333.9 Up 08:22:37 - 08:29:54 724
DCO 08:26:09 -67.8 Dark Up 79.9 329.1 Up 08:22:31 - 08:29:48 717
Mohave Valley 08:26:15 -68.8 Dark Up 80.2 334.6 Up 08:22:37 - 08:29:54 694
Lake Havasu City 08:26:14 -68.9 Dark Up 79.8 334.7 Up 08:22:35 - 08:29:52 650
Wildwood 08:26:32 -71.5 Dark Up 80.4 352.1 Up 08:22:54 - 08:30:11 618
Parker 08:26:14 -69.1 Dark Up 79.4 335.4 Up 08:22:35 - 08:29:52 611
Idyllwild 08:26:25 -70.8 Dark Up 79.7 344.9 Up 08:22:46 - 08:30:03 571
Blythe 08:26:15 -69.7 Dark Up 79.1 337.5 Up 08:22:37 - 08:29:54 554
Calipatria 08:26:20 -70.6 Dark Up 78.9 341.6 Up 08:22:41 - 08:29:58 502
Yuma 08:26:16 -70.3 Dark Up 78.2 339.3 Up 08:22:37 - 08:29:54 453

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 54598, (2019/11/17 08:27UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:35:55.3 +16:30:30  0.8 27.67  43
Mirphak        03:24:19.4 +49:51:40  1.8  9.92  56
PPM 046963     04:18:08.2 +42:08:28  6.1  2.17  46
PPM 046827     04:08:41.2 +43:41:04  8.2  0.15  47
54598          04:09:20.5 +43:35:33 15.8        47
Positions are for J2000

Event circumstances last updated at 2018/04/05 16:18:28 UT

Marc W. Buie, Southwest Research Institute

RECON