Event between (79360) Sila-Nunam and star UC4-522-048441 with event index number of 50373
Geocentric closest approach at 2017/01/02 07:59:47 UTC
J2000 position of star is 09:28:36.3 +14:16:59
Equinox of date position of star is 09:29:31.1 +14:12:34
Stellar brightness R=14.3
Star is 171 degrees from the moon.
Moon is 16% illuminated.
TNO apparent brightness V=21.6
[RECON map]
TNO is 43.5 AU from the Sun
and 42.7 AU from the Earth.
The TNO is moving 19.3
km/sec on the sky relative to the star, or,
2.2 arcsec/hr.
The 1-sigma error in the time of the event is 160 seconds.
The 1-sigma cross-track error in the shadow position is
2070 km.
The sky-plane scale is
30960.0 km/arcsec.
The TNO has an absolute magnitude Hv=5.2
Diameter=549.6 km assuming a 5% albedo -- 27.2 sec chord
Diameter=224.4 km assuming a 30% albedo -- 11.1 sec chord
Dynamical classification is CLASSICAL
Star training set for 79360, (2017/01/02 08:00UT) Object RA Dec mag sep mel Regulus 10:09:16.6 +11:53:01 1.3 9.95 179 PPM 126361 09:22:11.6 +15:17:54 6.4 2.08 169 PPM 126463 09:27:52.6 +14:13:42 7.6 0.40 171 PPM 126475 09:28:37.7 +14:18:13 11.1 0.24 171 79360 09:29:32.1 +14:12:29 14.3 171 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 25.0 km
RECON observability=1.0 and success probability=21.9%
| Site | Site mid-time (UT) |
Sun alt (deg) |
Sky | Moon | Star alt (deg) |
Star az (deg) |
Target | Observing Time (UT) |
X-track (km) |
| Oroville | 08:02:54 | -63.9 | Dark | Down | 43.1 | 124.0 | Up | 07:49:04 - 08:16:45 | 1283 |
| Tonasket | 08:02:55 | -64.2 | Dark | Down | 43.2 | 123.8 | Up | 07:49:04 - 08:16:45 | 1261 |
| Okanogan | 08:02:56 | -64.5 | Dark | Down | 43.3 | 123.4 | Up | 07:49:05 - 08:16:46 | 1226 |
| Brewster | 08:02:57 | -64.8 | Dark | Down | 43.3 | 122.9 | Up | 07:49:06 - 08:16:47 | 1198 |
| Manson/Chelan | 08:02:58 | -65.0 | Dark | Down | 43.2 | 122.4 | Up | 07:49:07 - 08:16:48 | 1175 |
| Entiat | 08:02:58 | -65.2 | Dark | Down | 43.3 | 122.1 | Up | 07:49:08 - 08:16:49 | 1153 |
| Wenatchee | 08:02:59 | -65.5 | Dark | Down | 43.4 | 121.8 | Up | 07:49:08 - 08:16:49 | 1127 |
| Ellensburg | 08:03:00 | -65.9 | Dark | Down | 43.5 | 121.2 | Up | 07:49:10 - 08:16:51 | 1084 |
| Yakima | 08:03:01 | -66.3 | Dark | Down | 43.7 | 120.9 | Up | 07:49:10 - 08:16:51 | 1043 |
| Toppenish/White Swan | 08:03:01 | -66.5 | Dark | Down | 43.9 | 120.9 | Up | 07:49:10 - 08:16:51 | 1022 |
| Pasco | 08:02:56 | -66.6 | Dark | Down | 44.7 | 122.1 | Up | 07:49:06 - 08:16:47 | 1018 |
| PNWRO | 08:02:56 | -66.9 | Dark | Down | 45.0 | 122.2 | Up | 07:49:06 - 08:16:47 | 995 |
| George/Umatilla | 08:02:57 | -67.0 | Dark | Down | 44.8 | 121.6 | Up | 07:49:07 - 08:16:48 | 983 |
| Goldendale | 08:03:02 | -67.0 | Dark | Down | 43.9 | 120.0 | Up | 07:49:12 - 08:16:53 | 964 |
| The Dalles | 08:03:04 | -67.3 | Dark | Down | 43.8 | 119.4 | Up | 07:49:13 - 08:16:54 | 939 |
| Maupin | 08:03:04 | -67.7 | Dark | Down | 44.1 | 119.2 | Up | 07:49:14 - 08:16:55 | 897 |
| Madras/Culver | 08:03:05 | -68.2 | Dark | Down | 44.3 | 118.7 | Up | 07:49:14 - 08:16:55 | 841 |
| Sisters | 08:03:07 | -68.5 | Dark | Down | 44.2 | 117.9 | Up | 07:49:16 - 08:16:57 | 805 |
| Redmond | 08:03:05 | -68.6 | Dark | Down | 44.5 | 118.3 | Up | 07:49:15 - 08:16:56 | 805 |
| Bend | 08:03:06 | -68.8 | Dark | Down | 44.5 | 118.0 | Up | 07:49:15 - 08:16:56 | 782 |
| Oregon Observatory | 08:03:07 | -69.0 | Dark | Down | 44.5 | 117.7 | Up | 07:49:16 - 08:16:57 | 763 |
| La Pine/Gilchrist | 08:03:07 | -69.2 | Dark | Down | 44.6 | 117.5 | Up | 07:49:17 - 08:16:58 | 742 |
| North Lake | 08:03:05 | -69.6 | Dark | Down | 45.1 | 117.7 | Up | 07:49:14 - 08:16:55 | 701 |
| Paisley | 08:03:05 | -70.2 | Dark | Down | 45.6 | 117.6 | Up | 07:49:14 - 08:16:55 | 646 |
| Chiloquin | 08:03:09 | -70.2 | Dark | Down | 44.8 | 116.1 | Up | 07:49:19 - 08:17:00 | 625 |
| Lakeview | 08:03:05 | -70.7 | Dark | Down | 46.0 | 117.3 | Up | 07:49:14 - 08:16:55 | 595 |
| Klamath Falls | 08:03:09 | -70.6 | Dark | Down | 45.0 | 115.9 | Up | 07:49:19 - 08:17:00 | 590 |
| Tulelake | 08:03:08 | -70.9 | Dark | Down | 45.3 | 116.0 | Up | 07:49:18 - 08:16:59 | 564 |
| Niwot | 08:02:10 | -68.9 | Dark | Down | 56.4 | 133.2 | Up | 07:48:20 - 08:16:01 | 540 |
| Cedarville | 08:03:05 | -71.4 | Dark | Down | 46.4 | 116.9 | Up | 07:49:14 - 08:16:55 | 528 |
| Fall River/Burney | 08:03:09 | -71.8 | Dark | Down | 45.8 | 115.2 | Up | 07:49:19 - 08:17:00 | 469 |
| Susanville | 08:03:07 | -72.5 | Dark | Down | 46.6 | 115.4 | Up | 07:49:17 - 08:16:58 | 408 |
| Greenville | 08:03:08 | -72.7 | Dark | Down | 46.5 | 114.8 | Up | 07:49:18 - 08:16:59 | 377 |
| Quincy | 08:03:08 | -72.9 | Dark | Down | 46.6 | 114.6 | Up | 07:49:18 - 08:16:59 | 356 |
| Portola | 08:03:07 | -73.1 | Dark | Down | 47.0 | 115.0 | Up | 07:49:17 - 08:16:58 | 346 |
| Reno | 08:03:05 | -73.3 | Dark | Down | 47.5 | 115.3 | Up | 07:49:14 - 08:16:55 | 322 |
| Carson City | 08:03:05 | -73.7 | Dark | Down | 47.7 | 115.0 | Up | 07:49:14 - 08:16:55 | 285 |
| Yerington | 08:03:03 | -73.9 | Dark | Down | 48.2 | 115.4 | Up | 07:49:13 - 08:16:54 | 269 |
| Gardnerville | 08:03:05 | -73.9 | Dark | Down | 47.8 | 114.8 | Up | 07:49:14 - 08:16:55 | 259 |
| Hawthorne | 08:03:01 | -74.3 | Dark | Down | 48.8 | 115.5 | Up | 07:49:11 - 08:16:52 | 224 |
| Tonopah | 08:02:57 | -74.7 | Dark | Down | 50.0 | 116.4 | Up | 07:49:06 - 08:16:47 | 186 |
| Lee Vining | 08:03:04 | -74.9 | Dark | Down | 48.7 | 114.4 | Up | 07:49:13 - 08:16:54 | 160 |
| Bishop | 08:03:01 | -75.5 | Dark | Down | 49.4 | 114.5 | Up | 07:49:10 - 08:16:51 | 102 |
| Beatty | 08:02:55 | -75.8 | Dark | Down | 50.8 | 115.6 | Up | 07:49:05 - 08:16:46 | 67 |
| Indian Springs | 08:02:51 | -75.9 | Dark | Down | 51.7 | 116.4 | Up | 07:49:01 - 08:16:42 | 42 |
| Lone Pine | 08:03:00 | -76.2 | Dark | Down | 50.0 | 114.0 | Up | 07:49:10 - 08:16:51 | 24 |
| Henderson | 08:02:49 | -76.2 | Dark | Down | 52.4 | 116.5 | Up | 07:48:58 - 08:16:39 | -9 |
| Patrick | 08:02:45 | -76.5 | Dark | Down | 53.5 | 116.9 | Up | 07:48:54 - 08:16:35 | -63 |
| Searchlight/Boulder City | 08:02:49 | -76.8 | Dark | Down | 52.7 | 115.9 | Up | 07:48:58 - 08:16:39 | -69 |
| DCO | 08:02:42 | -76.5 | Dark | Down | 54.2 | 117.3 | Up | 07:48:52 - 08:16:33 | -88 |
| Kingman/Dolan Springs | 08:02:45 | -76.8 | Dark | Down | 53.5 | 116.4 | Up | 07:48:55 - 08:16:36 | -89 |
| Laughlin/Bullhead City | 08:02:47 | -76.9 | Dark | Down | 53.1 | 115.9 | Up | 07:48:57 - 08:16:38 | -97 |
| Mohave Valley | 08:02:47 | -77.2 | Dark | Down | 53.2 | 115.5 | Up | 07:48:57 - 08:16:38 | -126 |
| CPSLO | 08:03:11 | -77.6 | Dark | Down | 48.6 | 110.2 | Up | 07:49:20 - 08:17:01 | -136 |
| Lake Havasu City | 08:02:46 | -77.5 | Dark | Down | 53.6 | 115.3 | Up | 07:48:56 - 08:16:37 | -167 |
| Parker | 08:02:46 | -77.8 | Dark | Down | 53.8 | 114.9 | Up | 07:48:56 - 08:16:37 | -204 |
| Wildwood | 08:03:04 | -78.7 | Dark | Down | 50.5 | 110.7 | Up | 07:49:13 - 08:16:54 | -250 |
| Blythe | 08:02:48 | -78.4 | Dark | Down | 53.8 | 113.9 | Up | 07:48:57 - 08:16:38 | -264 |
| Idyllwild | 08:02:56 | -78.8 | Dark | Down | 52.1 | 112.0 | Up | 07:49:06 - 08:16:47 | -272 |
| Calipatria | 08:02:52 | -79.1 | Dark | Down | 53.2 | 112.4 | Up | 07:49:01 - 08:16:42 | -326 |
| Yuma | 08:02:48 | -79.2 | Dark | Down | 54.1 | 112.7 | Up | 07:48:57 - 08:16:38 | -364 |
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 79360, (2017/01/02 08:00UT) Object RA Dec mag sep mel Regulus 10:08:22.0 +11:58:02 1.3 9.95 179 PPM 126361 09:21:15.3 +15:22:17 6.4 2.08 169 PPM 126463 09:26:56.7 +14:18:10 7.6 0.40 171 PPM 126475 09:27:41.9 +14:22:42 11.1 0.24 171 79360 09:28:36.3 +14:16:59 14.3 171 Positions are for J2000
Event circumstances last updated at 2016/09/14 16:04:36 UT
Marc W. Buie, Southwest Research Institute