RECON: TNO occultation with 8405

Event between (8405) Asbolus and star GA1280:01699400 with event index number of 178101

Geocentric closest approach at 2019/01/31 09:52:54 UTC

J2000 position of star is 04:52:50.6 +39:59:55
Equinox of date position of star is 04:54:07.2 +40:01:41
Stellar brightness G=16.0, use SENSEUP=128
Star is 159 degrees from the moon. Moon is 17% illuminated.
TNO apparent brightness V=22.7

[RECON map]
TNO is 22.0 AU from the Sun and 21.4 AU from the Earth.
The TNO is moving 14.9 km/sec on the sky relative to the star, or, 3.4 arcsec/hr.
The 1-sigma error in the time of the event is 187 seconds.
The 1-sigma cross-track error in the shadow position is 1772 km.
The sky-plane scale is 15550.2 km/arcsec.

The TNO has an absolute magnitude Hv=9.1
Diameter=91.2 km assuming a 5% albedo -- 6.1 sec chord
Diameter=37.2 km assuming a 30% albedo -- 2.5 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 

Star training set for 8405, (2019/01/31 09:53UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:37:01.1 +16:32:46  0.8 23.78 167
3Iot Aur       04:58:14.4 +33:11:40  2.7  6.88 165
5 Aur          05:01:37.2 +39:25:19  6.4  1.56 160
PPM 047520     04:57:50.8 +40:11:52  8.0  0.72 159
PPM 047462     04:55:15.3 +40:02:09  9.7  0.21 159
8405           04:54:09.8 +40:01:45 16.0       159
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 4.8 sigma about the mid-time.
The median site spacing is 21.9 km RECON observability=0.7 and success probability=0.4%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Penticton 10:16:01 -49.3 Dark Down 28.4 299.5 Low 10:01:01 - 10:31:01 -5471
Oroville 10:15:59 -49.6 Dark Down 28.0 299.8 Low 10:00:59 - 10:30:59 -5522
Tonasket 10:15:59 -49.8 Dark Down 27.9 300.0 Low 10:00:59 - 10:30:59 -5544
Okanogan 10:15:58 -50.0 Dark Down 27.8 300.0 Low 10:00:58 - 10:30:58 -5581
Niwot 10:15:24 -44.9 Dark Down 14.7 310.4 Really Low 10:00:24 - 10:30:24 -5611
Brewster 10:15:58 -50.3 Dark Down 27.8 300.0 Low 10:00:58 - 10:30:58 -5614
Manson/Chelan 10:15:58 -50.6 Dark Down 27.9 299.9 Low 10:00:58 - 10:30:58 -5649
Entiat 10:15:58 -50.8 Dark Down 27.8 300.0 Low 10:00:58 - 10:30:58 -5672
Wenatchee 10:15:57 -51.0 Dark Down 27.8 300.0 Low 10:00:57 - 10:30:57 -5700
Ellensburg 10:15:57 -51.4 Dark Down 27.7 300.1 Low 10:00:57 - 10:30:57 -5748
Pasco 10:15:53 -51.1 Dark Down 26.5 301.2 Low 10:00:53 - 10:30:53 -5759
PNWRO 10:15:52 -51.2 Dark Down 26.2 301.4 Low 10:00:52 - 10:30:52 -5772
Yakima 10:15:56 -51.7 Dark Down 27.5 300.3 Low 10:00:56 - 10:30:56 -5787
George/Umatilla 10:15:52 -51.5 Dark Down 26.4 301.2 Low 10:00:52 - 10:30:52 -5799
Toppenish/White Swan 10:15:55 -51.7 Dark Down 27.3 300.5 Low 10:00:55 - 10:30:55 -5800
Goldendale 10:15:55 -52.3 Dark Down 27.3 300.5 Low 10:00:55 - 10:30:55 -5869
The Dalles 10:15:55 -52.7 Dark Down 27.4 300.4 Low 10:00:55 - 10:30:55 -5906
Maupin 10:15:54 -52.9 Dark Down 27.1 300.6 Low 10:00:54 - 10:30:54 -5941
Madras/Culver 10:15:52 -53.2 Dark Down 26.9 300.8 Low 10:00:52 - 10:30:52 -5994
Redmond 10:15:52 -53.5 Dark Down 26.7 301.0 Low 10:00:52 - 10:30:52 -6030
Sisters 10:15:53 -53.7 Dark Down 27.0 300.7 Low 10:00:53 - 10:30:53 -6045
Bend 10:15:52 -53.7 Dark Down 26.7 301.0 Low 10:00:52 - 10:30:52 -6056
Oregon Observatory 10:15:52 -53.9 Dark Down 26.7 301.0 Low 10:00:52 - 10:30:52 -6078
La Pine/Gilchrist 10:15:52 -54.0 Dark Down 26.6 301.0 Low 10:00:52 - 10:30:52 -6100
North Lake 10:15:50 -54.0 Dark Down 26.0 301.5 Low 10:00:50 - 10:30:50 -6116
Paisley 10:15:48 -54.1 Dark Down 25.5 301.9 Low 10:00:48 - 10:30:48 -6152
Lakeview 10:15:47 -54.3 Dark Down 25.1 302.2 Low 10:00:47 - 10:30:47 -6192
Chiloquin 10:15:51 -54.9 Dark Down 26.3 301.3 Low 10:00:51 - 10:30:51 -6221
Cedarville 10:15:46 -54.5 Dark Down 24.6 302.6 Low 10:00:46 - 10:30:46 -6246
Klamath Falls 10:15:50 -55.1 Dark Down 26.0 301.5 Low 10:00:50 - 10:30:50 -6250
Tulelake 10:15:49 -55.1 Dark Down 25.7 301.8 Low 10:00:49 - 10:30:49 -6263
Fall River/Burney 10:15:48 -55.5 Dark Down 25.2 302.2 Low 10:00:48 - 10:30:48 -6345
Susanville 10:15:45 -55.4 Dark Down 24.4 302.8 Low 10:00:45 - 10:30:45 -6372
Gimple 10:15:45 -55.7 Dark Down 24.3 302.8 Low 10:00:45 - 10:30:45 -6408
Greenville 10:15:45 -55.8 Dark Down 24.4 302.7 Low 10:00:45 - 10:30:45 -6411
Reno 10:15:42 -55.4 Dark Down 23.4 303.5 Low 10:00:42 - 10:30:42 -6416
Portola 10:15:44 -55.6 Dark Down 23.9 303.1 Low 10:00:44 - 10:30:44 -6421
Tonopah 10:15:35 -54.3 Dark Down 20.9 305.1 Low 10:00:35 - 10:30:35 -6429
Quincy 10:15:46 -55.9 Dark Down 24.3 302.8 Low 10:00:46 - 10:30:46 -6430
Yerington 10:15:40 -55.2 Dark Down 22.6 304.0 Low 10:00:40 - 10:30:40 -6437
Carson City 10:15:42 -55.5 Dark Down 23.1 303.6 Low 10:00:42 - 10:30:42 -6448
Hawthorne 10:15:39 -55.1 Dark Down 22.0 304.3 Low 10:00:39 - 10:30:39 -6455
Gardnerville 10:15:41 -55.6 Dark Down 23.0 303.7 Low 10:00:41 - 10:30:41 -6469
DCO 10:15:27 -52.4 Dark Down 16.5 307.7 Really Low 10:00:27 - 10:30:27 -6486
Indian Springs 10:15:32 -53.8 Dark Down 19.0 306.2 Really Low 10:00:32 - 10:30:32 -6487
Patrick 10:15:28 -52.9 Dark Down 17.1 307.3 Really Low 10:00:28 - 10:30:28 -6497
Henderson 10:15:30 -53.5 Dark Down 18.2 306.7 Really Low 10:00:30 - 10:30:30 -6500
Beatty 10:15:33 -54.5 Dark Down 19.9 305.7 Really Low 10:00:33 - 10:30:33 -6513
Kingman/Dolan Springs 10:15:27 -53.1 Dark Down 17.1 307.3 Really Low 10:00:27 - 10:30:27 -6527
Lee Vining 10:15:39 -55.7 Dark Down 22.0 304.3 Low 10:00:39 - 10:30:39 -6531
Searchlight/Boulder City 10:15:30 -53.6 Dark Down 17.9 306.8 Really Low 10:00:30 - 10:30:30 -6548
Bishop 10:15:37 -55.4 Dark Down 21.2 304.8 Low 10:00:37 - 10:30:37 -6551
Laughlin/Bullhead City 10:15:29 -53.5 Dark Down 17.5 307.1 Really Low 10:00:29 - 10:30:29 -6556
Mohave Valley 10:15:29 -53.6 Dark Down 17.3 307.1 Really Low 10:00:29 - 10:30:29 -6581
Lake Havasu City 10:15:28 -53.5 Dark Down 16.9 307.3 Really Low 10:00:28 - 10:30:28 -6603
Lone Pine 10:15:35 -55.5 Dark Down 20.6 305.2 Low 10:00:35 - 10:30:35 -6605
Parker 10:15:26 -53.6 Dark Down 16.7 307.4 Really Low 10:00:26 - 10:30:26 -6633
Blythe 10:15:28 -54.0 Dark Down 16.5 307.4 Really Low 10:00:28 - 10:30:28 -6696
Yuma 10:15:27 -54.3 Dark Down 16.0 307.6 Really Low 10:00:27 - 10:30:27 -6781
Calipatria 10:15:28 -54.9 Dark Down 16.9 307.2 Really Low 10:00:28 - 10:30:28 -6791
Idyllwild 10:15:30 -55.6 Dark Down 18.0 306.6 Really Low 10:00:30 - 10:30:30 -6799
CPSLO 10:15:39 -58.0 Dark Down 21.5 304.6 Low 10:00:39 - 10:30:39 -6852
Wildwood 10:15:35 -56.9 Dark Down 19.5 305.7 Really Low 10:00:35 - 10:30:35 -6863

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 8405, (2019/01/31 09:53UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:35:55.3 +16:30:30  0.8 23.78 167
3Iot Aur       04:56:59.6 +33:09:58  2.7  6.88 165
5 Aur          05:00:18.3 +39:23:41  6.4  1.56 160
PPM 047520     04:56:31.4 +40:10:09  8.0  0.72 159
PPM 047462     04:53:56.1 +40:00:22  9.7  0.21 159
8405           04:52:50.6 +39:59:55 16.0       159
Positions are for J2000

Event circumstances last updated at 2018/06/11 19:34:18 UT

Marc W. Buie, Southwest Research Institute

RECON