RECON: TNO occultation with 54598

Event between (54598) Bienor and star GA1340:02565141 with event index number of 361374

Geocentric closest approach at 2020/10/18 08:16:17 UTC

J2000 position of star is 04:56:42.0 +44:18:49
Equinox of date position of star is 04:58:09.0 +44:20:38
Stellar brightness G=15.7, use SENSEUP=128
Star is 141 degrees from the moon. Moon is 4% illuminated.
TNO apparent brightness V=21.8

[RECON map]
TNO is 14.3 AU from the Sun and 13.7 AU from the Earth.
The TNO is moving 13.0 km/sec on the sky relative to the star, or, 4.7 arcsec/hr.
The 1-sigma error in the time of the event is 56 seconds.
The 1-sigma cross-track error in the shadow position is 601 km.
The sky-plane scale is 9911.8 km/arcsec.

The TNO has an absolute magnitude Hv=10.0
Diameter=190.6 km assuming a 5% albedo -- 4.6 sec chord
Diameter=77.8 km assuming a 30% albedo -- 1.9 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 

Star training set for 54598, (2020/10/18 08:16UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:37:07.0 +16:32:58  0.8 28.15 157
3Iot Aur       04:58:21.1 +33:11:50  2.7 11.15 148
PPM 047482     04:56:21.0 +44:05:34  6.0  0.42 142
PPM 047546     04:59:59.4 +44:27:44  8.9  0.34 141
PPM 047516     04:57:51.7 +44:30:05 10.5  0.17 141
54598          04:58:12.1 +44:20:42 15.7       141
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 27.2 km RECON observability=1.0 and success probability=21.8%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Clarence Fulton 08:20:09 -48.8 Dark Down 61.8 86.0 Up 08:15:01 - 08:25:16 -657
Peachland 08:20:11 -49.4 Dark Down 61.5 84.8 Up 08:15:03 - 08:25:18 -712
Summerland 08:20:10 -49.5 Dark Down 61.6 84.6 Up 08:15:03 - 08:25:18 -729
Penticton 08:20:10 -49.6 Dark Down 61.6 84.6 Up 08:15:02 - 08:25:17 -736
Oliver 08:20:10 -49.9 Dark Down 61.6 83.9 Up 08:15:02 - 08:25:17 -775
Anarchist Mountain Observatory 08:20:09 -50.0 Dark Down 61.7 83.7 Up 08:15:01 - 08:25:16 -795
Tonasket 08:20:09 -50.3 Dark Down 61.6 83.1 Up 08:15:01 - 08:25:16 -829
Victoria 08:20:28 -51.0 Dark Down 59.0 80.5 Up 08:15:20 - 08:25:35 -842
Okanogan 08:20:10 -50.7 Dark Down 61.5 82.4 Up 08:15:02 - 08:25:17 -866
Brewster 08:20:10 -51.0 Dark Down 61.3 81.8 Up 08:15:03 - 08:25:18 -896
Manson/Chelan 08:20:12 -51.3 Dark Down 61.0 81.2 Up 08:15:05 - 08:25:20 -919
Entiat 08:20:13 -51.5 Dark Down 60.9 80.8 Up 08:15:05 - 08:25:20 -943
Wenatchee 08:20:13 -51.7 Dark Down 60.8 80.3 Up 08:15:06 - 08:25:21 -972
Ellensburg 08:20:14 -52.2 Dark Down 60.6 79.4 Up 08:15:07 - 08:25:22 -1017
Yakima 08:20:14 -52.6 Dark Down 60.5 78.7 Up 08:15:06 - 08:25:21 -1062
Toppenish/White Swan 08:20:13 -52.8 Dark Down 60.6 78.4 Up 08:15:05 - 08:25:20 -1086
Pasco 08:20:06 -52.7 Dark Down 61.4 78.8 Up 08:14:59 - 08:25:14 -1100
PNWRO 08:20:05 -52.9 Dark Down 61.5 78.5 Up 08:14:57 - 08:25:12 -1127
Goldendale 08:20:15 -53.4 Dark Down 60.2 77.3 Up 08:15:07 - 08:25:22 -1147
The Dalles 08:20:17 -53.6 Dark Down 59.9 76.7 Up 08:15:09 - 08:25:24 -1171
Maupin 08:20:16 -54.0 Dark Down 59.9 76.1 Up 08:15:09 - 08:25:24 -1217
Sisters 08:20:18 -55.0 Dark Down 59.3 74.4 Up 08:15:10 - 08:25:25 -1314
Redmond 08:20:16 -54.9 Dark Down 59.6 74.5 Up 08:15:08 - 08:25:23 -1317
Bend 08:20:17 -55.2 Dark Down 59.4 74.1 Up 08:15:09 - 08:25:24 -1340
Oregon Observatory 08:20:17 -55.3 Dark Down 59.3 73.8 Up 08:15:09 - 08:25:24 -1359
La Pine/Gilchrist 08:20:18 -55.6 Dark Down 59.2 73.5 Up 08:15:10 - 08:25:25 -1382
North Lake 08:20:14 -55.9 Dark Down 59.5 73.0 Up 08:15:07 - 08:25:22 -1430
Paisley 08:20:12 -56.4 Dark Down 59.6 72.2 Up 08:15:04 - 08:25:19 -1491
Klamath Falls 08:20:18 -57.0 Dark Down 58.6 71.1 Up 08:15:11 - 08:25:26 -1540
Lakeview 08:20:10 -56.8 Dark Down 59.5 71.4 Up 08:15:03 - 08:25:18 -1547
Cedarville 08:20:09 -57.4 Dark Down 59.4 70.4 Up 08:15:01 - 08:25:16 -1618
Niwot 08:18:41 -53.4 Dark Down 69.4 69.2 Up 08:13:34 - 08:23:49 -1654
SwRI 08:18:42 -53.5 Dark Down 69.3 69.0 Up 08:13:34 - 08:23:49 -1667
Fall River/Burney 08:20:15 -58.1 Dark Down 58.4 69.4 Up 08:15:07 - 08:25:22 -1669
Susanville 08:20:11 -58.6 Dark Down 58.7 68.6 Up 08:15:03 - 08:25:18 -1739
Greenville 08:20:12 -58.9 Dark Down 58.4 68.1 Up 08:15:05 - 08:25:20 -1768
Gimple 08:20:11 -58.9 Dark Down 58.5 68.1 Up 08:15:04 - 08:25:19 -1769
Quincy 08:20:12 -59.1 Dark Down 58.3 67.8 Up 08:15:04 - 08:25:19 -1790
Portola 08:20:10 -59.1 Dark Down 58.6 67.7 Up 08:15:02 - 08:25:17 -1805
Reno 08:20:05 -59.2 Dark Down 59.0 67.4 Up 08:14:58 - 08:25:13 -1834
Carson City 08:20:05 -59.6 Dark Down 58.8 66.8 Up 08:14:57 - 08:25:12 -1873
Yerington 08:20:01 -59.6 Dark Down 59.2 66.6 Up 08:14:54 - 08:25:09 -1893
Gardnerville 08:20:04 -59.8 Dark Down 58.8 66.4 Up 08:14:57 - 08:25:12 -1899
Hawthorne 08:19:57 -59.9 Dark Down 59.4 65.9 Up 08:14:50 - 08:25:05 -1943
Tonopah 08:19:49 -59.9 Dark Down 60.2 65.3 Up 08:14:41 - 08:24:56 -1991
Lee Vining 08:20:00 -60.6 Dark Down 58.8 65.0 Up 08:14:52 - 08:25:07 -2004
Bishop 08:19:55 -60.9 Dark Down 59.1 64.2 Up 08:14:47 - 08:25:02 -2067
Beatty 08:19:45 -60.9 Dark Down 60.0 63.5 Up 08:14:37 - 08:24:52 -2113
Indian Springs 08:19:38 -60.8 Dark Down 60.6 62.9 Up 08:14:31 - 08:24:46 -2143
Henderson 08:19:33 -61.0 Dark Down 60.8 62.0 Up 08:14:26 - 08:24:41 -2196
Patrick 08:19:25 -61.1 Dark Down 61.3 60.9 Up 08:14:18 - 08:24:33 -2256
Searchlight/Boulder City 08:19:32 -61.5 Dark Down 60.6 61.1 Up 08:14:24 - 08:24:39 -2257
Kingman/Dolan Springs 08:19:26 -61.4 Dark Down 61.1 60.6 Up 08:14:19 - 08:24:34 -2281
DCO 08:19:20 -61.1 Dark Down 61.6 60.3 Up 08:14:13 - 08:24:28 -2283
Laughlin/Bullhead City 08:19:29 -61.6 Dark Down 60.7 60.6 Up 08:14:21 - 08:24:36 -2286
CPSLO 08:20:06 -63.5 Dark Down 56.5 61.2 Up 08:14:59 - 08:25:14 -2287
Mohave Valley 08:19:29 -61.8 Dark Down 60.6 60.2 Up 08:14:21 - 08:24:36 -2315
Lake Havasu City 08:19:27 -62.1 Dark Down 60.5 59.5 Up 08:14:20 - 08:24:35 -2355
Parker 08:19:26 -62.4 Dark Down 60.4 59.0 Up 08:14:18 - 08:24:33 -2392
Wildwood 08:19:52 -64.0 Dark Down 57.4 59.5 Up 08:14:44 - 08:24:59 -2415
George/Scottsdale 08:19:10 -61.6 Dark Down 61.8 57.8 Up 08:14:02 - 08:24:17 -2417
Idyllwild 08:19:40 -63.7 Dark Down 58.5 58.8 Up 08:14:32 - 08:24:47 -2448
Blythe 08:19:27 -63.0 Dark Down 59.9 58.3 Up 08:14:19 - 08:24:34 -2449
Calipatria 08:19:32 -63.8 Dark Down 59.0 57.8 Up 08:14:24 - 08:24:39 -2506
Yuma 08:19:26 -63.8 Dark Down 59.4 57.0 Up 08:14:18 - 08:24:33 -2546

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, (2020/10/18 08:16UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:35:55.3 +16:30:30  0.8 28.15 157
3Iot Aur       04:56:59.6 +33:09:58  2.7 11.15 148
PPM 047482     04:54:51.2 +44:03:38  6.0  0.42 142
PPM 047546     04:58:29.1 +44:25:54  8.9  0.34 141
PPM 047516     04:56:21.5 +44:28:12 10.5  0.17 141
54598          04:56:42.0 +44:18:49 15.7       141
Positions are for J2000

Event circumstances last updated at 2020/01/30 20:59:53 UT

Marc W. Buie, Southwest Research Institute

RECON