RECON: TNO occultation with 98WY24

Event between 98WY24 and star GA1120:02714657 with event index number of 1119894

Geocentric closest approach at 2021/12/26 08:34:43 UTC

J2000 position of star is 07:15:17.4 +22:27:50
Equinox of date position of star is 07:16:27.3 +22:25:43
Stellar brightness G=15.9, use SENSEUP=128
Star is 68 degrees from the moon. Moon is 58% illuminated.
TNO apparent brightness V=23.0

[RECON map]
TNO is 41.5 AU from the Sun and 40.5 AU from the Earth.
The TNO is moving 24.8 km/sec on the sky relative to the star, or, 3.0 arcsec/hr.
The 1-sigma error in the time of the event is 291 seconds.
The 1-sigma cross-track error in the shadow position is 2344 km.
The sky-plane scale is 29390.7 km/arcsec.

The TNO has an absolute magnitude Hv=6.8
Diameter=267.9 km assuming a 5% albedo -- 10.8 sec chord
Diameter=109.4 km assuming a 30% albedo -- 4.4 sec chord
Dynamical classification is CLASSICAL
 
 
 
 
 
 

Star training set for 98WY24, (2021/12/26 08:35UT)
Object            RA         Dec     mag  sep  mel
Pollux         07:46:39.6 +27:58:17  1.1  8.77  62
55Del Gem      07:21:26.1 +21:56:24  3.5  1.22  67
PPM 097266     07:16:52.5 +21:55:36  8.4  0.50  68
PPM 097268     07:16:58.8 +22:29:56  9.5  0.11  68
98WY24         07:16:36.4 +22:25:26 15.9        68
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 3.1 sigma about the mid-time.
The median site spacing is 23.2 km RECON observability=1.0 and success probability=15.5%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Kelowna 08:35:13 -62.5 Dark Up 62.4 171.3 Up 08:20:13 - 08:50:13 -1687
Summerland 08:35:14 -62.8 Dark Up 62.6 170.7 Up 08:20:14 - 08:50:14 -1718
Penticton 08:35:13 -62.9 Dark Up 62.7 170.9 Up 08:20:13 - 08:50:13 -1724
Okanagan Falls 08:35:13 -63.0 Dark Up 62.9 170.8 Up 08:20:13 - 08:50:13 -1743
Oliver 08:35:13 -63.2 Dark Up 63.0 170.8 Up 08:20:13 - 08:50:13 -1759
Anarchist Mountain Observatory 08:35:12 -63.3 Dark Up 63.2 171.1 Up 08:20:12 - 08:50:12 -1774
Oroville 08:35:13 -63.4 Dark Up 63.3 170.9 Up 08:20:13 - 08:50:13 -1782
Tonasket 08:35:13 -63.6 Dark Up 63.5 170.9 Up 08:20:13 - 08:50:13 -1805
Okanogan 08:35:13 -64.0 Dark Up 63.8 170.5 Up 08:20:13 - 08:50:13 -1840
Brewster 08:35:14 -64.3 Dark Up 64.1 170.0 Up 08:20:14 - 08:50:14 -1869
Manson/Chelan 08:35:15 -64.5 Dark Up 64.3 169.1 Up 08:20:15 - 08:50:15 -1893
Entiat 08:35:15 -64.8 Dark Up 64.5 168.9 Up 08:20:15 - 08:50:15 -1915
Wenatchee 08:35:15 -65.0 Dark Up 64.7 168.6 Up 08:20:15 - 08:50:15 -1942
Ellensburg 08:35:16 -65.5 Dark Up 65.1 167.9 Up 08:20:16 - 08:50:16 -1985
Yakima 08:35:16 -65.9 Dark Up 65.5 167.7 Up 08:20:16 - 08:50:16 -2026
Toppenish/White Swan 08:35:15 -66.0 Dark Up 65.7 167.9 Up 08:20:15 - 08:50:15 -2047
Pasco 08:35:11 -65.8 Dark Up 66.0 170.7 Up 08:20:11 - 08:50:11 -2049
PNWRO 08:35:10 -66.0 Dark Up 66.3 171.1 Up 08:20:10 - 08:50:10 -2073
George/Umatilla 08:35:12 -66.2 Dark Up 66.3 170.1 Up 08:20:12 - 08:50:12 -2085
Goldendale 08:35:16 -66.6 Dark Up 66.2 166.7 Up 08:20:16 - 08:50:16 -2106
The Dalles 08:35:17 -66.9 Dark Up 66.3 165.8 Up 08:20:17 - 08:50:17 -2132
Maupin 08:35:17 -67.3 Dark Up 66.8 165.8 Up 08:20:17 - 08:50:17 -2174
Madras/Culver 08:35:17 -67.8 Dark Up 67.3 165.4 Up 08:20:17 - 08:50:17 -2231
Redmond 08:35:17 -68.2 Dark Up 67.6 165.0 Up 08:20:17 - 08:50:17 -2268
Sisters 08:35:19 -68.3 Dark Up 67.5 164.1 Up 08:20:19 - 08:50:19 -2268
Bend 08:35:18 -68.4 Dark Up 67.8 164.6 Up 08:20:18 - 08:50:18 -2291
Oregon Observatory 08:35:18 -68.6 Dark Up 67.9 164.1 Up 08:20:18 - 08:50:18 -2310
La Pine/Gilchrist 08:35:18 -68.8 Dark Up 68.1 163.9 Up 08:20:18 - 08:50:18 -2332
North Lake 08:35:16 -69.1 Dark Up 68.7 165.0 Up 08:20:16 - 08:50:16 -2372
Paisley 08:35:15 -69.5 Dark Up 69.3 165.6 Up 08:20:15 - 08:50:15 -2427
Chiloquin 08:35:19 -70.0 Dark Up 69.1 162.2 Up 08:20:19 - 08:50:19 -2450
Lakeview 08:35:14 -69.9 Dark Up 69.8 165.7 Up 08:20:14 - 08:50:14 -2478
Klamath Falls 08:35:19 -70.3 Dark Up 69.5 162.1 Up 08:20:19 - 08:50:19 -2485
Niwot 08:34:23 -64.2 Dark Up 70.5 207.8 Up 08:19:23 - 08:49:23 -2506
Tulelake 08:35:18 -70.5 Dark Up 69.8 162.6 Up 08:20:18 - 08:50:18 -2511
SwRI 08:34:23 -64.3 Dark Up 70.7 207.7 Up 08:19:23 - 08:49:23 -2518
Cedarville 08:35:13 -70.5 Dark Up 70.5 165.7 Up 08:20:13 - 08:50:13 -2545
Fall River/Burney 08:35:17 -71.3 Dark Up 70.7 162.1 Up 08:20:17 - 08:50:17 -2606
Susanville 08:35:15 -71.6 Dark Up 71.4 163.6 Up 08:20:15 - 08:50:15 -2667
Gimple 08:35:15 -72.0 Dark Up 71.7 162.7 Up 08:20:15 - 08:50:15 -2698
Greenville 08:35:16 -72.0 Dark Up 71.6 162.5 Up 08:20:16 - 08:50:16 -2698
Quincy 08:35:15 -72.2 Dark Up 71.8 162.3 Up 08:20:15 - 08:50:15 -2719
Portola 08:35:14 -72.1 Dark Up 72.1 163.6 Up 08:20:14 - 08:50:14 -2729
Reno 08:35:11 -72.2 Dark Up 72.4 165.2 Up 08:20:11 - 08:50:11 -2751
Carson City 08:35:11 -72.5 Dark Up 72.8 165.0 Up 08:20:11 - 08:50:11 -2789
Yerington 08:35:09 -72.4 Dark Up 73.1 166.8 Up 08:20:09 - 08:50:09 -2804
Gardnerville 08:35:11 -72.7 Dark Up 73.0 164.9 Up 08:20:11 - 08:50:11 -2815
Hawthorne 08:35:07 -72.6 Dark Up 73.6 168.1 Up 08:20:07 - 08:50:07 -2849
Tonopah 08:35:02 -72.4 Dark Up 74.3 172.4 Up 08:20:02 - 08:50:02 -2884
Lee Vining 08:35:08 -73.3 Dark Up 74.1 166.1 Up 08:20:08 - 08:50:08 -2913
Bishop 08:35:06 -73.5 Dark Up 74.8 168.0 Up 08:20:06 - 08:50:06 -2970
Beatty 08:35:00 -73.0 Dark Up 75.5 173.5 Up 08:20:00 - 08:50:00 -3003
Indian Springs 08:34:56 -72.7 Dark Up 75.9 177.4 Up 08:19:56 - 08:49:56 -3025
Lone Pine 08:35:04 -73.9 Dark Up 75.6 168.6 Up 08:20:04 - 08:50:04 -3048
Henderson 08:34:53 -72.7 Dark Up 76.4 179.9 Up 08:19:53 - 08:49:53 -3074
Patrick 08:34:49 -72.4 Dark Up 77.0 184.5 Up 08:19:49 - 08:49:49 -3128
Searchlight/Boulder City 08:34:53 -73.1 Dark Up 77.0 180.2 Up 08:19:53 - 08:49:53 -3135
DCO 08:34:47 -72.2 Dark Up 77.3 187.5 Up 08:19:47 - 08:49:47 -3151
Kingman/Dolan Springs 08:34:49 -72.7 Dark Up 77.3 183.8 Up 08:19:49 - 08:49:49 -3154
Laughlin/Bullhead City 08:34:51 -73.0 Dark Up 77.3 181.6 Up 08:19:51 - 08:49:51 -3163
Mohave Valley 08:34:51 -73.2 Dark Up 77.6 181.7 Up 08:19:51 - 08:49:51 -3192
CPSLO 08:35:13 -76.2 Dark Up 76.3 157.6 Up 08:20:13 - 08:50:13 -3212
Lake Havasu City 08:34:50 -73.3 Dark Up 78.0 182.8 Up 08:19:50 - 08:49:50 -3232
Parker 08:34:50 -73.5 Dark Up 78.3 183.0 Up 08:19:50 - 08:49:50 -3269
Wildwood 08:35:05 -76.1 Dark Up 78.0 163.9 Up 08:20:05 - 08:50:05 -3324
Blythe 08:34:51 -74.0 Dark Up 78.8 181.8 Up 08:19:51 - 08:49:51 -3330
Idyllwild 08:34:58 -75.3 Dark Up 78.6 171.9 Up 08:19:58 - 08:49:58 -3342
Calipatria 08:34:54 -74.9 Dark Up 79.3 177.2 Up 08:19:54 - 08:49:54 -3394
Yuma 08:34:50 -74.6 Dark Up 79.8 181.7 Up 08:19:50 - 08:49:50 -3430

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 98WY24, (2021/12/26 08:35UT)
Object            RA         Dec     mag  sep  mel
Pollux         07:45:18.0 +28:01:33  1.1  8.77  62
55Del Gem      07:20:07.3 +21:58:56  3.5  1.22  67
PPM 097266     07:15:33.7 +21:58:00  8.4  0.50  68
PPM 097268     07:15:39.7 +22:32:20  9.5  0.11  68
98WY24         07:15:17.4 +22:27:50 15.9        68
Positions are for J2000

Event circumstances last updated at 2019/06/08 02:51:07 UT

Marc W. Buie, Southwest Research Institute

RECON