RECON: TNO occultation with 12UE185

Event between 12UE185 and star GA0860:03649080 with event index number of 1699665

Geocentric closest approach at 2024/01/05 09:14:10 UTC

J2000 position of star is 08:57:58.5 -02:47:40
Equinox of date position of star is 08:58:59.7 -02:52:25
Stellar brightness G=16.0, use SENSEUP=128
Star is 71 degrees from the moon. Moon is 38% illuminated.
TNO apparent brightness V=25.8

[RECON map]
TNO is 37.2 AU from the Sun and 36.5 AU from the Earth.
The TNO is moving 20.7 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 586 seconds.
The 1-sigma cross-track error in the shadow position is 3637 km.
The sky-plane scale is 26438.9 km/arcsec.

The TNO has an absolute magnitude Hv=10.0
Diameter=302.0 km assuming a 5% albedo -- 2.9 sec chord
Diameter=123.3 km assuming a 30% albedo -- 1.2 sec chord
Dynamical classification is SCATEXTD
 
 
 
 
 
 

Star training set for 12UE185, (2024/01/05 09:14UT)
Object            RA         Dec     mag  sep  mel
Regulus        10:09:39.0 +11:50:56  1.3 22.89  58
Alphard        09:28:46.1 -08:45:50  2.0  9.41  63
14 Hya         08:50:34.1 -03:32:00  5.3  2.25  73
PPM 191905     09:00:39.0 -03:04:45  8.5  0.41  71
PPM 191883     08:59:05.8 -03:02:39  9.0  0.16  71
12UE185        08:59:11.2 -02:53:18 16.0        71
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 1.5 sigma about the mid-time.
The median site spacing is 18.9 km RECON observability=1.0 and success probability=9.9%
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 09:15:05 -58.9 Dark Down 36.2 166.9 Up 09:00:05 - 09:30:05 -1185
Kelowna 09:15:05 -59.3 Dark Down 36.5 166.6 Up 09:00:05 - 09:30:05 -1212
Peachland 09:15:07 -59.5 Dark Down 36.6 166.3 Up 09:00:07 - 09:30:07 -1221
Summerland 09:15:06 -59.6 Dark Down 36.8 166.3 Up 09:00:06 - 09:30:06 -1231
Penticton 09:15:06 -59.6 Dark Down 36.8 166.5 Up 09:00:06 - 09:30:06 -1235
Oliver 09:15:06 -59.9 Dark Down 37.2 166.4 Up 09:00:06 - 09:30:06 -1259
Anarchist Mountain Observatory 09:15:05 -60.0 Dark Down 37.4 166.6 Up 09:00:05 - 09:30:05 -1270
Tonasket 09:15:06 -60.3 Dark Down 37.7 166.5 Up 09:00:06 - 09:30:06 -1292
Okanogan 09:15:07 -60.6 Dark Down 38.0 166.2 Up 09:00:07 - 09:30:07 -1317
Victoria 09:15:19 -61.8 Dark Down 37.1 161.6 Up 09:00:19 - 09:30:19 -1328
Brewster 09:15:07 -60.9 Dark Down 38.2 165.9 Up 09:00:07 - 09:30:07 -1337
Manson/Chelan 09:15:09 -61.2 Dark Down 38.4 165.4 Up 09:00:09 - 09:30:09 -1354
Entiat 09:15:09 -61.4 Dark Down 38.6 165.3 Up 09:00:09 - 09:30:09 -1370
Wenatchee 09:15:10 -61.7 Dark Down 38.8 165.1 Up 09:00:10 - 09:30:10 -1389
Ellensburg 09:15:11 -62.1 Dark Down 39.1 164.8 Up 09:00:11 - 09:30:11 -1420
Yakima 09:15:11 -62.4 Dark Down 39.5 164.7 Up 09:00:11 - 09:30:11 -1450
Toppenish/White Swan 09:15:10 -62.5 Dark Down 39.8 164.8 Up 09:00:10 - 09:30:10 -1465
Pasco 09:15:06 -62.1 Dark Down 40.1 166.4 Up 09:00:06 - 09:30:06 -1467
PNWRO 09:15:05 -62.2 Dark Down 40.4 166.7 Up 09:00:05 - 09:30:05 -1483
Goldendale 09:15:12 -63.1 Dark Down 40.2 164.2 Up 09:00:12 - 09:30:12 -1509
The Dalles 09:15:14 -63.5 Dark Down 40.4 163.6 Up 09:00:14 - 09:30:14 -1528
Maupin 09:15:14 -63.8 Dark Down 40.8 163.7 Up 09:00:14 - 09:30:14 -1558
Redmond 09:15:14 -64.5 Dark Down 41.6 163.3 Up 09:00:14 - 09:30:14 -1627
Sisters 09:15:16 -64.7 Dark Down 41.5 162.8 Up 09:00:16 - 09:30:16 -1628
Bend 09:15:15 -64.8 Dark Down 41.8 163.1 Up 09:00:15 - 09:30:15 -1645
Oregon Observatory 09:15:16 -65.0 Dark Down 42.0 162.9 Up 09:00:16 - 09:30:16 -1659
La Pine/Gilchrist 09:15:16 -65.2 Dark Down 42.1 162.8 Up 09:00:16 - 09:30:16 -1675
North Lake 09:15:14 -65.2 Dark Down 42.7 163.4 Up 09:00:14 - 09:30:14 -1705
Paisley 09:15:13 -65.5 Dark Down 43.3 163.8 Up 09:00:13 - 09:30:13 -1746
Lakeview 09:15:13 -65.8 Dark Down 43.8 163.9 Up 09:00:13 - 09:30:13 -1785
Klamath Falls 09:15:18 -66.4 Dark Down 43.5 162.0 Up 09:00:18 - 09:30:18 -1791
Cedarville 09:15:12 -66.2 Dark Down 44.5 163.9 Up 09:00:12 - 09:30:12 -1836
Niwot 09:14:12 -57.8 Dark Up 47.0 184.9 Up 08:59:12 - 09:29:12 -1858
SwRI 09:14:13 -57.9 Dark Up 47.1 184.8 Up 08:59:13 - 09:29:13 -1867
Fall River/Burney 09:15:17 -67.1 Dark Down 44.7 162.2 Up 09:00:17 - 09:30:17 -1883
Susanville 09:15:15 -67.2 Dark Down 45.4 163.0 Up 09:00:15 - 09:30:15 -1929
Gimple 09:15:15 -67.5 Dark Down 45.7 162.6 Up 09:00:15 - 09:30:15 -1954
Greenville 09:15:16 -67.6 Dark Down 45.6 162.5 Up 09:00:16 - 09:30:16 -1954
Quincy 09:15:16 -67.7 Dark Down 45.8 162.4 Up 09:00:16 - 09:30:16 -1971
Portola 09:15:14 -67.6 Dark Down 46.1 163.1 Up 09:00:14 - 09:30:14 -1978
Reno 09:15:12 -67.4 Dark Down 46.5 163.9 Up 09:00:12 - 09:30:12 -1995
Carson City 09:15:11 -67.6 Dark Down 46.8 163.8 Up 09:00:11 - 09:30:11 -2025
Yerington 09:15:09 -67.4 Dark Down 47.1 164.6 Up 09:00:09 - 09:30:09 -2037
Gardnerville 09:15:11 -67.8 Dark Down 47.1 163.8 Up 09:00:11 - 09:30:11 -2045
Hawthorne 09:15:07 -67.4 Dark Down 47.7 165.3 Up 09:00:07 - 09:30:07 -2072
Tonopah 09:15:01 -66.8 Dark Up 48.4 167.2 Up 09:00:01 - 09:30:01 -2102
Lee Vining 09:15:09 -68.0 Dark Down 48.1 164.4 Up 09:00:09 - 09:30:09 -2123
Bishop 09:15:06 -67.9 Dark Down 48.9 165.3 Up 09:00:06 - 09:30:06 -2169
Beatty 09:15:00 -67.1 Dark Up 49.6 167.6 Up 09:00:00 - 09:30:00 -2198
Indian Springs 09:14:55 -66.6 Dark Up 50.1 169.1 Up 08:59:55 - 09:29:55 -2219
Henderson 09:14:52 -66.4 Dark Up 50.7 170.1 Up 08:59:52 - 09:29:52 -2261
Patrick 09:14:47 -65.9 Dark Up 51.5 171.7 Up 08:59:47 - 09:29:47 -2307
Searchlight/Boulder City 09:14:52 -66.6 Dark Up 51.3 170.0 Up 08:59:52 - 09:29:52 -2310
Kingman/Dolan Springs 09:14:48 -66.1 Dark Up 51.7 171.3 Up 08:59:48 - 09:29:48 -2328
DCO 09:14:45 -65.5 Dark Up 51.9 172.7 Up 08:59:45 - 09:29:45 -2329
Laughlin/Bullhead City 09:14:50 -66.5 Dark Up 51.6 170.5 Up 08:59:50 - 09:29:50 -2334
Mohave Valley 09:14:51 -66.6 Dark Up 51.9 170.5 Up 08:59:51 - 09:29:51 -2358
CPSLO 09:15:16 -70.6 Dark Down 50.3 161.2 Up 09:00:16 - 09:30:16 -2364
Lake Havasu City 09:14:50 -66.6 Dark Up 52.3 170.8 Up 08:59:50 - 09:29:50 -2392
Parker 09:14:49 -66.7 Dark Up 52.7 170.7 Up 08:59:49 - 09:29:49 -2423
George/Scottsdale 09:14:39 -65.0 Dark Up 53.4 174.6 Up 08:59:39 - 09:29:39 -2444
Wildwood 09:15:08 -69.9 Dark Up 52.0 163.9 Up 09:00:08 - 09:30:08 -2457
Blythe 09:14:51 -67.1 Dark Up 53.2 170.1 Up 08:59:51 - 09:29:51 -2471
Idyllwild 09:15:00 -68.7 Dark Up 52.7 166.8 Up 09:00:00 - 09:30:00 -2475
Calipatria 09:14:55 -68.0 Dark Up 53.5 168.5 Up 08:59:55 - 09:29:55 -2522
Yuma 09:14:51 -67.5 Dark Up 54.1 169.9 Up 08:59:51 - 09:29:51 -2555

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 12UE185, (2024/01/05 09:14UT)
Object            RA         Dec     mag  sep  mel
Regulus        10:08:22.0 +11:58:02  1.3 22.89  58
Alphard        09:27:35.2 -08:39:30  2.0  9.41  63
14 Hya         08:49:21.7 -03:26:35  5.3  2.25  73
PPM 191905     08:59:26.3 -02:59:05  8.5  0.41  71
PPM 191883     08:57:53.1 -02:57:01  9.0  0.16  71
12UE185        08:57:58.5 -02:47:40 16.0        71
Positions are for J2000

Event circumstances last updated at 2020/03/21 22:18:37 UT

Marc W. Buie, Southwest Research Institute

RECON