RECON: TNO occultation with 341520

Event between (341520) Mors-Somnus and star GA1020:00527308 with event index number of 2527549

Geocentric closest approach at 2028/12/21 09:09:33 UTC

J2000 position of star is 04:42:03.2 +12:36:21
Equinox of date position of star is 04:43:24.4 +12:39:02
Stellar brightness G=17.0, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 99 degrees from the moon. Moon is 27% illuminated.
Apparent brightness V=21.5

[RECON map]
Object is 29.7 AU from the Sun and 28.7 AU from the Earth.
Apparent velocity is 22.6 km/sec on the sky relative to the star, or, 3.9 arcsec/hr.
The 1-sigma error in the time of the event is 104 seconds.
The 1-sigma cross-track error in the shadow position is 1117 km.
The sky-plane scale is 20849.6 km/arcsec.

The object has an absolute magnitude Hv=6.8
Diameter=257.0 km assuming a 5% albedo -- 11.6 sec chord
Diameter=104.9 km assuming a 30% albedo -- 4.8 sec chord
Dynamical classification is 3:2E
 
 
 
 
 
 

Star training set for 341520, (2028/12/21 09:05UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:37:35.2 +16:33:55  0.8  4.17  98
Bellatrix      05:26:41.2 +06:22:24  1.6 12.32 109
93 Tau         04:41:40.4 +12:15:08  5.4  0.64  98
PPM 120167     04:44:14.5 +12:21:50  8.4  0.33  99
341520         04:43:40.4 +12:39:33 17.0        99
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 31.7 km RECON observability=1.0 and success probability=0.0%

Site	Site mid-time (UT)	Sun alt (deg)	Sky	Moon	Star alt (deg)	Star az (deg)	Target	Observing Time (UT)	X-track (km)
Sleaford	09:07:19	-52.7	Dark	Down	33.4	245.1	Up	08:58:11 - 09:16:26	7932
Kamloops	09:07:31	-59.8	Dark	Down	41.8	231.1	Up	08:58:23 - 09:16:38	7716
Kelowna	09:07:27	-60.1	Dark	Down	41.8	232.6	Up	08:58:20 - 09:16:35	7648
Peachland	09:07:28	-60.3	Dark	Down	42.1	232.4	Up	08:58:20 - 09:16:35	7636
Summerland	09:07:27	-60.4	Dark	Down	42.1	232.6	Up	08:58:20 - 09:16:35	7624
Penticton	09:07:27	-60.4	Dark	Down	42.1	232.7	Up	08:58:19 - 09:16:34	7618
Oliver	09:07:26	-60.7	Dark	Down	42.3	233.0	Up	08:58:19 - 09:16:34	7586
Anarchist Mountain Observatory	09:07:25	-60.8	Dark	Down	42.3	233.3	Up	08:58:17 - 09:16:32	7572
Okanogan	09:07:25	-61.4	Dark	Down	42.8	233.6	Up	08:58:17 - 09:16:32	7512
Victoria	09:07:35	-62.6	Dark	Down	44.7	229.1	Up	08:58:27 - 09:16:42	7512
Brewster	09:07:24	-61.7	Dark	Down	43.1	233.5	Up	08:58:17 - 09:16:32	7487
Manson/Chelan	09:07:26	-62.0	Dark	Down	43.4	233.3	Up	08:58:18 - 09:16:33	7466
Wenatchee	09:07:25	-62.5	Dark	Down	43.8	233.5	Up	08:58:18 - 09:16:33	7422
Ellensburg	09:07:25	-62.9	Dark	Down	44.1	233.5	Up	08:58:17 - 09:16:32	7383
Yakima	09:07:24	-63.2	Dark	Down	44.4	233.8	Up	08:58:17 - 09:16:32	7345
Toppenish/White Swan	09:07:23	-63.3	Dark	Down	44.4	234.2	Up	08:58:16 - 09:16:31	7326
PNWRO	09:07:19	-63.0	Dark	Down	43.8	236.1	Up	08:58:11 - 09:16:26	7298
The Dalles	09:07:24	-64.3	Dark	Down	45.3	233.9	Up	08:58:17 - 09:16:32	7250
Maupin	09:07:23	-64.6	Dark	Down	45.5	234.4	Up	08:58:16 - 09:16:31	7211
Sisters	09:07:24	-65.5	Dark	Down	46.3	234.6	Up	08:58:16 - 09:16:31	7126
Bend	09:07:22	-65.6	Dark	Down	46.3	235.1	Up	08:58:15 - 09:16:30	7104
Oregon Observatory	09:07:22	-65.8	Dark	Down	46.5	235.1	Up	08:58:15 - 09:16:30	7087
Chiloquin	09:07:21	-67.0	Dark	Down	47.5	235.7	Up	08:58:14 - 09:16:29	6959
Klamath Falls	09:07:21	-67.2	Dark	Down	47.6	236.1	Up	08:58:13 - 09:16:28	6926
Cedarville	09:07:19	-67.0	Dark	Down	47.0	238.5	Up	08:58:11 - 09:16:26	6866
Dunrhomin	09:06:31	-58.4	Dark	Down	37.3	253.5	Up	08:57:24 - 09:15:39	6847
Nikitin	09:06:31	-58.5	Dark	Down	37.3	253.6	Up	08:57:24 - 09:15:39	6829
CU-SBO	09:06:32	-58.5	Dark	Down	37.4	253.6	Up	08:57:24 - 09:15:39	6822
Fall River/Burney	09:07:19	-67.9	Dark	Down	48.0	237.7	Up	08:58:12 - 09:16:27	6812
Gimple	09:07:19	-68.3	Dark	Down	48.2	239.1	Up	08:58:11 - 09:16:26	6726
Greenville	09:07:19	-68.4	Dark	Down	48.2	239.0	Up	08:58:11 - 09:16:26	6725
Quincy	09:07:19	-68.5	Dark	Down	48.3	239.2	Up	08:58:11 - 09:16:26	6705
Portola	09:07:19	-68.3	Dark	Down	48.1	239.8	Up	08:58:11 - 09:16:26	6696
Reno	09:07:19	-68.2	Dark	Down	47.8	240.8	Up	08:58:11 - 09:16:26	6674
Carson City	09:07:19	-68.4	Dark	Down	47.9	241.2	Up	08:58:11 - 09:16:26	6638
Yerington	09:07:19	-68.1	Dark	Down	47.6	242.0	Up	08:58:11 - 09:16:26	6624
Gardnerville	09:07:19	-68.5	Dark	Down	48.0	241.4	Up	08:58:11 - 09:16:26	6615
Hawthorne	09:07:19	-68.1	Dark	Down	47.4	243.0	Up	08:58:11 - 09:16:26	6583
Lee Vining	09:07:19	-68.8	Dark	Down	48.0	243.0	Up	08:58:11 - 09:16:26	6523
Bishop	09:07:19	-68.7	Dark	Down	47.8	244.4	Up	08:58:11 - 09:16:26	6470
Beatty	09:06:57	-67.9	Dark	Down	46.8	246.3	Up	08:57:50 - 09:16:05	6422
Patrick	09:06:47	-66.6	Dark	Down	45.3	250.3	Up	08:57:39 - 09:15:54	6290
Laughlin/Bullhead City	09:06:49	-67.2	Dark	Down	45.9	249.9	Up	08:57:41 - 09:15:56	6260
Lake Havasu City	09:06:46	-67.3	Dark	Down	45.9	250.8	Up	08:57:39 - 09:15:54	6192
Wildwood	09:07:19	-70.5	Dark	Down	49.3	247.5	Up	08:58:11 - 09:16:26	6140
George/Scottsdale	09:06:38	-65.7	Dark	Down	44.2	253.5	Up	08:57:31 - 09:15:46	6131
Idyllwild	09:06:53	-69.4	Dark	Down	48.0	249.5	Up	08:57:46 - 09:16:01	6098
Calipatria	09:06:48	-68.7	Dark	Down	47.3	251.2	Up	08:57:41 - 09:15:56	6042
Yuma	09:06:45	-68.2	Dark	Down	46.7	252.3	Up	08:57:38 - 09:15:53	6004

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 341520, (2028/12/21 09:05UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:35:55.3 +16:30:29  0.8  4.17  98
Bellatrix      05:25:07.8 +06:20:58  1.6 12.32 109
93 Tau         04:40:03.4 +12:11:51  5.4  0.64  98
PPM 120167     04:42:37.4 +12:18:40  8.4  0.33  99
341520         04:42:03.2 +12:36:21 17.0        99
Positions are for J2000

Event circumstances last updated at 2024/03/08 03:00:20 UT

RECON