RECON: TNO occultation with 24835

Event between (24835) 95SM55 and star GA1240:00625535 with event index number of 171054

Geocentric closest approach at 2018/12/27 08:02:34 UTC

J2000 position of star is 03:08:58.8 +34:43:33
Equinox of date position of star is 03:10:09.6 +34:47:49
Stellar brightness G=15.7, use SENSEUP=128
Star is 103 degrees from the moon. Moon is 73% illuminated.
TNO apparent brightness V=20.5

[RECON map]
TNO is 38.0 AU from the Sun and 37.3 AU from the Earth.
The TNO is moving 18.6 km/sec on the sky relative to the star, or, 2.5 arcsec/hr.
The 1-sigma error in the time of the event is 203 seconds.
The 1-sigma cross-track error in the shadow position is 3622 km.
The sky-plane scale is 27057.1 km/arcsec.

The TNO has an absolute magnitude Hv=4.6
Diameter=724.5 km assuming a 5% albedo -- 38.9 sec chord
Diameter=295.8 km assuming a 30% albedo -- 15.9 sec chord
Dynamical classification is SCATEXTD
 
 
 
 
 
 

Star training set for 24835, (2018/12/27 08:03UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:37:00.7 +16:32:45  0.8 26.64  89
Algol          03:09:24.7 +41:01:39  2.1  6.23 100
PPM 068330     03:19:55.4 +34:17:27  5.9  2.07 101
PPM 068142     03:09:57.7 +35:31:50  8.4  0.73 102
PPM 068108     03:08:15.6 +34:34:13  9.7  0.45 103
PPM 068156     03:10:44.4 +34:51:01 10.7  0.13 102
24835          03:10:10.2 +34:47:50 15.7       102
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 4.4 sigma about the mid-time.
The median site spacing is 25.7 km RECON observability=1.0 and success probability=7.5%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Kelowna 07:59:06 -63.4 Dark Up 51.6 265.7 Up 07:44:06 - 08:14:06 6769
Summerland 07:59:07 -63.5 Dark Up 51.8 265.5 Up 07:44:07 - 08:14:07 6762
Penticton 07:59:06 -63.8 Dark Up 51.7 266.0 Up 07:44:06 - 08:14:06 6728
Okanagan Falls 07:59:06 -64.0 Dark Up 51.8 266.3 Up 07:44:06 - 08:14:06 6707
Oliver 07:59:06 -64.1 Dark Up 51.8 266.5 Up 07:44:06 - 08:14:06 6689
Anarchist Mountain Observatory 07:59:05 -64.3 Dark Up 51.6 266.9 Up 07:44:05 - 08:14:05 6671
Oroville 07:59:05 -64.4 Dark Up 51.7 266.9 Up 07:44:05 - 08:14:05 6662
Tonasket 07:59:05 -64.6 Dark Up 51.7 267.2 Up 07:44:05 - 08:14:05 6636
Okanogan 07:59:05 -65.0 Dark Up 51.8 267.5 Up 07:44:05 - 08:14:05 6599
Brewster 07:59:06 -65.2 Dark Up 52.0 267.7 Up 07:44:06 - 08:14:06 6568
Manson/Chelan 07:59:07 -65.4 Dark Up 52.2 267.7 Up 07:44:07 - 08:14:07 6543
Entiat 07:59:07 -65.7 Dark Up 52.3 267.9 Up 07:44:07 - 08:14:07 6518
Wenatchee 07:59:07 -65.9 Dark Up 52.4 268.2 Up 07:44:07 - 08:14:07 6489
Ellensburg 07:59:07 -66.3 Dark Up 52.5 268.5 Up 07:44:07 - 08:14:07 6443
Yakima 07:59:07 -66.7 Dark Up 52.5 269.0 Up 07:44:07 - 08:14:07 6398
Toppenish/White Swan 07:59:07 -66.9 Dark Up 52.4 269.5 Up 07:44:07 - 08:14:07 6374
Pasco 07:59:03 -67.1 Dark Up 51.6 270.5 Up 07:44:03 - 08:14:03 6367
PNWRO 07:59:01 -67.3 Dark Up 51.4 271.0 Up 07:44:01 - 08:14:01 6341
George/Umatilla 07:59:03 -67.4 Dark Up 51.7 270.8 Up 07:44:03 - 08:14:03 6329
Goldendale 07:59:07 -67.5 Dark Up 52.7 269.9 Up 07:44:07 - 08:14:07 6311
The Dalles 07:59:09 -67.7 Dark Up 53.0 269.9 Up 07:44:09 - 08:14:09 6285
Maupin 07:59:09 -68.1 Dark Up 52.9 270.5 Up 07:44:09 - 08:14:09 6239
Madras/Culver 07:59:08 -68.7 Dark Up 52.9 271.2 Up 07:44:08 - 08:14:08 6178
Sisters 07:59:11 -69.0 Dark Up 53.2 271.4 Up 07:44:11 - 08:14:11 6139
Redmond 07:59:08 -69.0 Dark Up 52.9 271.7 Up 07:44:08 - 08:14:08 6138
Bend 07:59:09 -69.2 Dark Up 53.0 271.9 Up 07:44:09 - 08:14:09 6114
Oregon Observatory 07:59:09 -69.4 Dark Up 53.1 272.0 Up 07:44:09 - 08:14:09 6094
La Pine/Gilchrist 07:59:10 -69.6 Dark Up 53.2 272.2 Up 07:44:10 - 08:14:10 6071
North Lake 07:59:07 -70.0 Dark Up 52.7 273.2 Up 07:44:07 - 08:14:07 6025
Paisley 07:59:06 -70.6 Dark Up 52.4 274.1 Up 07:44:06 - 08:14:06 5966
Chiloquin 07:59:11 -70.7 Dark Up 53.4 273.5 Up 07:44:11 - 08:14:11 5946
Lakeview 07:59:05 -71.1 Dark Up 52.2 274.9 Up 07:44:05 - 08:14:05 5910
Klamath Falls 07:59:10 -71.0 Dark Up 53.3 274.0 Up 07:44:10 - 08:14:10 5908
Tulelake 07:59:09 -71.3 Dark Up 53.0 274.5 Up 07:44:09 - 08:14:09 5880
Niwot 07:58:14 -69.4 Dark Up 40.8 284.9 Up 07:43:14 - 08:13:14 5869
Cedarville 07:59:04 -71.8 Dark Up 52.0 275.8 Up 07:44:04 - 08:14:04 5838
Fall River/Burney 07:59:09 -72.2 Dark Up 52.9 275.8 Up 07:44:09 - 08:14:09 5779
Susanville 07:59:06 -72.9 Dark Up 52.3 277.0 Up 07:44:06 - 08:14:06 5712
Gimple 07:59:07 -73.1 Dark Up 52.4 277.3 Up 07:44:07 - 08:14:07 5681
Greenville 07:59:07 -73.1 Dark Up 52.5 277.2 Up 07:44:07 - 08:14:07 5681
Quincy 07:59:07 -73.3 Dark Up 52.4 277.5 Up 07:44:07 - 08:14:07 5658
Portola 07:59:05 -73.5 Dark Up 52.1 277.9 Up 07:44:05 - 08:14:05 5647
Reno 07:59:03 -73.8 Dark Up 51.5 278.5 Up 07:44:03 - 08:14:03 5621
Carson City 07:59:03 -74.1 Dark Up 51.5 279.0 Up 07:44:03 - 08:14:03 5581
Yerington 07:59:00 -74.3 Dark Up 51.0 279.5 Up 07:44:00 - 08:14:00 5563
Gardnerville 07:59:03 -74.4 Dark Up 51.4 279.3 Up 07:44:03 - 08:14:03 5554
Hawthorne 07:58:58 -74.8 Dark Up 50.5 280.3 Up 07:43:58 - 08:13:58 5516
Tonopah 07:58:53 -75.1 Dark Up 49.3 281.5 Up 07:43:53 - 08:13:53 5475
Lee Vining 07:59:00 -75.4 Dark Up 50.7 280.8 Up 07:44:00 - 08:14:00 5450
Bishop 07:58:57 -75.9 Dark Up 50.1 281.8 Up 07:43:57 - 08:13:57 5389
Beatty 07:58:52 -76.2 Dark Up 48.7 283.0 Up 07:43:52 - 08:13:52 5352
Indian Springs 07:58:48 -76.3 Dark Up 47.8 283.7 Up 07:43:48 - 08:13:48 5326
Lone Pine 07:58:56 -76.7 Dark Up 49.6 282.8 Up 07:43:56 - 08:13:56 5308
Henderson 07:58:45 -76.7 Dark Up 47.1 284.6 Up 07:43:45 - 08:13:45 5275
Patrick 07:58:42 -77.0 Dark Up 46.1 285.6 Up 07:43:42 - 08:13:42 5219
Searchlight/Boulder City 07:58:45 -77.2 Dark Up 46.9 285.2 Up 07:43:45 - 08:13:45 5213
DCO 07:58:38 -77.0 Dark Up 45.5 286.2 Up 07:43:38 - 08:13:38 5195
Kingman/Dolan Springs 07:58:42 -77.2 Dark Up 46.2 285.8 Up 07:43:42 - 08:13:42 5193
Laughlin/Bullhead City 07:58:43 -77.4 Dark Up 46.6 285.6 Up 07:43:43 - 08:13:43 5184
Mohave Valley 07:58:43 -77.7 Dark Up 46.5 285.9 Up 07:43:43 - 08:13:43 5155
CPSLO 07:59:06 -78.0 Dark Up 51.4 283.4 Up 07:44:06 - 08:14:06 5149
Lake Havasu City 07:58:43 -78.0 Dark Up 46.2 286.4 Up 07:43:43 - 08:13:43 5114
Parker 07:58:42 -78.3 Dark Up 46.1 286.7 Up 07:43:42 - 08:13:42 5076
Wildwood 07:58:59 -79.2 Dark Up 49.5 285.5 Up 07:43:59 - 08:13:59 5029
Blythe 07:58:44 -78.9 Dark Up 46.2 287.2 Up 07:43:44 - 08:13:44 5015
Idyllwild 07:58:52 -79.3 Dark Up 47.9 286.4 Up 07:43:52 - 08:13:52 5006
Calipatria 07:58:47 -79.6 Dark Up 46.8 287.4 Up 07:43:47 - 08:13:47 4951
Yuma 07:58:44 -79.7 Dark Up 45.9 288.1 Up 07:43:44 - 08:13:44 4915

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 24835, (2018/12/27 08:03UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:35:55.3 +16:30:30  0.8 26.64  89
Algol          03:08:10.1 +40:57:20  2.1  6.23 100
PPM 068330     03:18:43.9 +34:13:22  5.9  2.07 101
PPM 068142     03:08:46.0 +35:27:32  8.4  0.73 102
PPM 068108     03:07:04.5 +34:29:53  9.7  0.45 103
PPM 068156     03:09:33.0 +34:46:44 10.7  0.13 102
24835          03:08:58.8 +34:43:33 15.7       102
Positions are for J2000

Event circumstances last updated at 2018/11/03 21:24:22 UT

Marc W. Buie, Southwest Research Institute

RECON