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 08:00:15 UTC

J2000 position of star is 03:08:58.8 +34:43:33
Equinox of date position of star is 03:10:08.1 +34:47:43
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 207 seconds.
The 1-sigma cross-track error in the shadow position is 3706 km.
The sky-plane scale is 27057.4 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 08:00UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:37:00.7 +16:32:46  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 26.2 km RECON observability=1.0 and success probability=6.2%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Penticton 07:56:49 -63.8 Dark Up 52.1 265.6 Up 07:41:49 - 08:11:49 7315
Oroville 07:56:48 -64.4 Dark Up 52.1 266.4 Up 07:41:48 - 08:11:48 7250
Tonasket 07:56:48 -64.6 Dark Up 52.1 266.7 Up 07:41:48 - 08:11:48 7224
Okanogan 07:56:48 -65.0 Dark Up 52.2 267.1 Up 07:41:48 - 08:11:48 7186
Brewster 07:56:49 -65.2 Dark Up 52.4 267.2 Up 07:41:49 - 08:11:49 7155
Manson/Chelan 07:56:50 -65.4 Dark Up 52.6 267.2 Up 07:41:50 - 08:11:50 7130
Entiat 07:56:50 -65.6 Dark Up 52.7 267.5 Up 07:41:50 - 08:11:50 7106
Wenatchee 07:56:50 -65.9 Dark Up 52.7 267.7 Up 07:41:50 - 08:11:50 7077
Ellensburg 07:56:51 -66.3 Dark Up 52.9 268.1 Up 07:41:51 - 08:11:51 7031
Yakima 07:56:51 -66.7 Dark Up 52.9 268.6 Up 07:41:51 - 08:11:51 6985
Toppenish/White Swan 07:56:50 -66.9 Dark Up 52.8 269.0 Up 07:41:50 - 08:11:50 6962
Pasco 07:56:45 -67.1 Dark Up 52.0 270.1 Up 07:41:45 - 08:11:45 6954
PNWRO 07:56:45 -67.3 Dark Up 51.8 270.6 Up 07:41:45 - 08:11:45 6928
George/Umatilla 07:56:46 -67.4 Dark Up 52.1 270.4 Up 07:41:46 - 08:11:46 6916
Goldendale 07:56:51 -67.5 Dark Up 53.1 269.5 Up 07:41:51 - 08:11:51 6899
The Dalles 07:56:52 -67.7 Dark Up 53.4 269.5 Up 07:41:52 - 08:11:52 6873
Maupin 07:56:52 -68.1 Dark Up 53.3 270.1 Up 07:41:52 - 08:11:52 6827
Madras/Culver 07:56:52 -68.6 Dark Up 53.3 270.8 Up 07:41:52 - 08:11:52 6766
Sisters 07:56:53 -68.9 Dark Up 53.6 271.0 Up 07:41:53 - 08:11:53 6727
Redmond 07:56:52 -69.0 Dark Up 53.4 271.3 Up 07:41:52 - 08:11:52 6726
Bend 07:56:52 -69.2 Dark Up 53.4 271.5 Up 07:41:52 - 08:11:52 6702
Oregon Observatory 07:56:53 -69.3 Dark Up 53.5 271.6 Up 07:41:53 - 08:11:53 6682
La Pine/Gilchrist 07:56:53 -69.5 Dark Up 53.6 271.9 Up 07:41:53 - 08:11:53 6659
North Lake 07:56:50 -70.0 Dark Up 53.1 272.8 Up 07:41:50 - 08:11:50 6613
Paisley 07:56:50 -70.6 Dark Up 52.8 273.8 Up 07:41:50 - 08:11:50 6553
Chiloquin 07:56:54 -70.6 Dark Up 53.8 273.1 Up 07:41:54 - 08:11:54 6535
Lakeview 07:56:49 -71.1 Dark Up 52.7 274.6 Up 07:41:49 - 08:11:49 6498
Klamath Falls 07:56:54 -71.0 Dark Up 53.7 273.7 Up 07:41:54 - 08:11:54 6497
Tulelake 07:56:53 -71.3 Dark Up 53.5 274.2 Up 07:41:53 - 08:11:53 6468
Niwot 07:55:57 -69.7 Dark Up 41.2 284.6 Up 07:40:57 - 08:10:57 6448
Cedarville 07:56:48 -71.8 Dark Up 52.5 275.5 Up 07:41:48 - 08:11:48 6426
Fall River/Burney 07:56:52 -72.2 Dark Up 53.3 275.5 Up 07:41:52 - 08:11:52 6367
Susanville 07:56:49 -72.8 Dark Up 52.7 276.7 Up 07:41:49 - 08:11:49 6300
Gimple 07:56:50 -73.1 Dark Up 52.8 277.0 Up 07:41:50 - 08:11:50 6269
Greenville 07:56:51 -73.1 Dark Up 52.9 276.9 Up 07:41:51 - 08:11:51 6268
Quincy 07:56:50 -73.3 Dark Up 52.9 277.2 Up 07:41:50 - 08:11:50 6246
Portola 07:56:49 -73.5 Dark Up 52.5 277.6 Up 07:41:49 - 08:11:49 6234
Reno 07:56:46 -73.8 Dark Up 52.0 278.2 Up 07:41:46 - 08:11:46 6208
Carson City 07:56:46 -74.1 Dark Up 51.9 278.7 Up 07:41:46 - 08:11:46 6168
Yerington 07:56:44 -74.3 Dark Up 51.4 279.3 Up 07:41:44 - 08:11:44 6150
Gardnerville 07:56:46 -74.4 Dark Up 51.8 279.0 Up 07:41:46 - 08:11:46 6141
Hawthorne 07:56:42 -74.8 Dark Up 50.9 280.1 Up 07:41:42 - 08:11:42 6102
Tonopah 07:56:36 -75.2 Dark Up 49.8 281.2 Up 07:41:36 - 08:11:36 6060
Lee Vining 07:56:44 -75.4 Dark Up 51.2 280.5 Up 07:41:44 - 08:11:44 6037
Bishop 07:56:41 -76.0 Dark Up 50.5 281.6 Up 07:41:41 - 08:11:41 5975
Beatty 07:56:35 -76.3 Dark Up 49.2 282.7 Up 07:41:35 - 08:11:35 5937
Indian Springs 07:56:31 -76.5 Dark Up 48.3 283.5 Up 07:41:31 - 08:11:31 5911
Lone Pine 07:56:40 -76.7 Dark Up 50.1 282.6 Up 07:41:40 - 08:11:40 5894
Henderson 07:56:29 -76.8 Dark Up 47.6 284.4 Up 07:41:29 - 08:11:29 5859
Patrick 07:56:24 -77.2 Dark Up 46.6 285.4 Up 07:41:24 - 08:11:24 5803
Searchlight/Boulder City 07:56:28 -77.4 Dark Up 47.4 285.0 Up 07:41:28 - 08:11:28 5797
DCO 07:56:22 -77.2 Dark Up 45.9 286.0 Up 07:41:22 - 08:11:22 5778
Kingman/Dolan Springs 07:56:25 -77.4 Dark Up 46.7 285.6 Up 07:41:25 - 08:11:25 5776
Laughlin/Bullhead City 07:56:27 -77.6 Dark Up 47.0 285.4 Up 07:41:27 - 08:11:27 5768
Mohave Valley 07:56:27 -77.8 Dark Up 47.0 285.7 Up 07:41:27 - 08:11:27 5738
CPSLO 07:56:50 -77.9 Dark Up 51.8 283.2 Up 07:41:50 - 08:11:50 5736
Lake Havasu City 07:56:26 -78.1 Dark Up 46.7 286.2 Up 07:41:26 - 08:11:26 5697
Parker 07:56:26 -78.5 Dark Up 46.5 286.6 Up 07:41:26 - 08:11:26 5659
Wildwood 07:56:42 -79.2 Dark Up 49.9 285.3 Up 07:41:42 - 08:11:42 5615
Blythe 07:56:27 -79.0 Dark Up 46.6 287.0 Up 07:41:27 - 08:11:27 5599
Idyllwild 07:56:35 -79.4 Dark Up 48.3 286.3 Up 07:41:35 - 08:11:35 5591
Calipatria 07:56:30 -79.8 Dark Up 47.2 287.2 Up 07:41:30 - 08:11:30 5536
Yuma 07:56:27 -79.9 Dark Up 46.4 287.9 Up 07:41:27 - 08:11:27 5498

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 08:00UT)
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 2018/06/05 16:41:27 UT

Marc W. Buie, Southwest Research Institute

RECON