RECON: TNO occultation with 11UH411

Event between 11UH411 and star GA0980:00328151 with event index number of 1468432

Geocentric closest approach at 2025/10/19 11:01:26 UTC

J2000 position of star is 03:44:06.9 +08:53:55
Equinox of date position of star is 03:45:09.4 +08:57:30
Stellar brightness G=13.6, use SENSEUP=64
Star is 127 degrees from the moon. Moon is 4% illuminated.
TNO apparent brightness V=24.1

[RECON map]
TNO is 35.2 AU from the Sun and 34.3 AU from the Earth.
The TNO is moving 21.7 km/sec on the sky relative to the star, or, 3.1 arcsec/hr.
The 1-sigma error in the time of the event is 198 seconds.
The 1-sigma cross-track error in the shadow position is 2074 km.
The sky-plane scale is 24889.0 km/arcsec.

The TNO has an absolute magnitude Hv=8.6
Diameter=113.2 km assuming a 5% albedo -- 5.2 sec chord
Diameter=46.2 km assuming a 30% albedo -- 2.1 sec chord
Dynamical classification is SCATNEAR
 
 
 
 
 
 

Star training set for 11UH411, (2025/10/19 11:01UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:37:24.2 +16:33:34  0.8 14.74 113
Menkar         03:03:37.9 +04:11:22  2.5 11.45 137
30 Tau         03:49:41.3 +11:13:15  4.8  2.47 125
PPM 146841     03:44:00.9 +08:42:54  7.7  0.45 127
PPM 146863     03:45:28.1 +09:07:47  9.1  0.15 127
11UH411        03:45:30.7 +08:58:43 13.6       126
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 4.6 sigma about the mid-time.
The median site spacing is 20.3 km RECON observability=1.0 and success probability=15.7%

Site	Site mid-time (UT)	Sun alt (deg)	Sky	Moon	Star alt (deg)	Star az (deg)	Target	Observing Time (UT)	X-track (km)
Kelowna	10:59:10	-33.3	Dark	Down	46.5	205.6	Up	10:44:10 - 11:14:10	-1818
Summerland	10:59:11	-33.6	Dark	Down	46.8	205.4	Up	10:44:11 - 11:14:11	-1836
Penticton	10:59:10	-33.6	Dark	Down	46.9	205.6	Up	10:44:10 - 11:14:10	-1845
Okanagan Falls	10:59:10	-33.7	Dark	Down	47.0	205.6	Up	10:44:10 - 11:14:10	-1860
Oliver	10:59:11	-33.7	Dark	Down	47.2	205.7	Up	10:44:11 - 11:14:11	-1875
Anarchist Mountain Observatory	10:59:10	-33.7	Dark	Down	47.3	206.1	Up	10:44:10 - 11:14:10	-1895
Oroville	10:59:11	-33.8	Dark	Down	47.4	206.0	Up	10:44:11 - 11:14:11	-1900
Tonasket	10:59:11	-33.9	Dark	Down	47.6	206.1	Up	10:44:11 - 11:14:11	-1920
Okanogan	10:59:11	-34.1	Dark	Down	47.9	206.1	Up	10:44:11 - 11:14:11	-1945
Brewster	10:59:12	-34.4	Dark	Down	48.2	205.9	Up	10:44:12 - 11:14:12	-1963
Manson/Chelan	10:59:14	-34.7	Dark	Down	48.5	205.5	Up	10:44:14 - 11:14:14	-1971
Entiat	10:59:14	-34.8	Dark	Down	48.7	205.5	Up	10:44:14 - 11:14:14	-1988
Wenatchee	10:59:14	-35.0	Dark	Down	49.0	205.5	Up	10:44:14 - 11:14:14	-2008
Ellensburg	10:59:15	-35.3	Dark	Down	49.4	205.4	Up	10:44:15 - 11:14:15	-2038
Yakima	10:59:16	-35.5	Dark	Down	49.8	205.6	Up	10:44:16 - 11:14:16	-2073
Toppenish/White Swan	10:59:15	-35.5	Dark	Down	49.9	206.0	Up	10:44:15 - 11:14:15	-2097
Goldendale	10:59:17	-36.0	Dark	Down	50.6	205.6	Up	10:44:17 - 11:14:17	-2134
The Dalles	10:59:19	-36.3	Dark	Down	50.9	205.2	Up	10:44:19 - 11:14:19	-2143
Pasco	10:59:11	-34.7	Dark	Down	49.7	207.8	Up	10:44:11 - 11:14:11	-2145
George/Umatilla	10:59:12	-35.0	Dark	Down	50.0	207.7	Up	10:44:12 - 11:14:12	-2169
PNWRO	10:59:11	-34.7	Dark	Down	49.8	208.3	Up	10:44:11 - 11:14:11	-2174
Maupin	10:59:18	-36.4	Dark	Down	51.2	205.6	Up	10:44:18 - 11:14:18	-2184
Madras/Culver	10:59:19	-36.7	Dark	Down	51.7	205.8	Up	10:44:19 - 11:14:19	-2231
Sisters	10:59:21	-37.1	Dark	Down	52.2	205.3	Up	10:44:21 - 11:14:21	-2248
Redmond	10:59:20	-36.9	Dark	Down	52.1	206.0	Up	10:44:20 - 11:14:20	-2262
Bend	10:59:20	-37.0	Dark	Down	52.3	205.9	Up	10:44:20 - 11:14:20	-2277
Oregon Observatory	10:59:21	-37.2	Dark	Down	52.5	205.8	Up	10:44:21 - 11:14:21	-2289
La Pine/Gilchrist	10:59:21	-37.3	Dark	Down	52.7	205.8	Up	10:44:21 - 11:14:21	-2305
North Lake	10:59:20	-37.1	Dark	Down	52.9	207.0	Up	10:44:20 - 11:14:20	-2364
Chiloquin	10:59:23	-38.0	Dark	Down	53.8	205.9	Up	10:44:23 - 11:14:23	-2395
Paisley	10:59:19	-37.1	Dark	Down	53.3	207.9	Up	10:44:19 - 11:14:19	-2425
Klamath Falls	10:59:23	-38.1	Dark	Down	54.1	206.2	Up	10:44:23 - 11:14:23	-2429
Tulelake	10:59:23	-38.0	Dark	Down	54.2	206.9	Up	10:44:23 - 11:14:23	-2463
Lakeview	10:59:19	-37.2	Dark	Down	53.6	208.5	Up	10:44:19 - 11:14:19	-2478
Cedarville	10:59:19	-37.3	Dark	Down	54.2	209.2	Up	10:44:19 - 11:14:19	-2544
Fall River/Burney	10:59:23	-38.3	Dark	Down	55.0	207.6	Up	10:44:23 - 11:14:23	-2550
Susanville	10:59:22	-38.0	Dark	Down	55.3	209.2	Up	10:44:22 - 11:14:22	-2633
Greenville	10:59:23	-38.4	Dark	Down	55.6	208.9	Up	10:44:23 - 11:14:23	-2649
Gimple	10:59:23	-38.3	Dark	Down	55.6	209.1	Up	10:44:23 - 11:14:23	-2652
Quincy	10:59:23	-38.4	Dark	Down	55.8	209.1	Up	10:44:23 - 11:14:23	-2668
Portola	10:59:22	-38.1	Dark	Down	55.8	209.9	Up	10:44:22 - 11:14:22	-2695
Reno	10:59:20	-37.8	Dark	Down	55.7	211.2	Up	10:44:20 - 11:14:20	-2742
Carson City	10:59:20	-37.9	Dark	Down	56.0	211.5	Up	10:44:20 - 11:14:20	-2776
Gardnerville	10:59:20	-37.9	Dark	Down	56.2	211.8	Up	10:44:20 - 11:14:20	-2801
Yerington	10:59:18	-37.5	Dark	Down	55.9	212.7	Up	10:44:18 - 11:14:18	-2816
Hawthorne	10:59:17	-37.2	Dark	Down	56.1	213.9	Up	10:44:17 - 11:14:17	-2877
Lee Vining	10:59:19	-37.8	Dark	Down	56.8	213.6	Up	10:44:19 - 11:14:19	-2915
Tonopah	10:59:12	-36.3	Dark	Down	55.9	216.5	Up	10:44:12 - 11:14:12	-2968
Bishop	10:59:17	-37.4	Dark	Down	57.0	215.2	Up	10:44:17 - 11:14:17	-2997
Lone Pine	10:59:17	-37.4	Dark	Down	57.4	216.5	Up	10:44:17 - 11:14:17	-3082
Beatty	10:59:12	-36.3	Dark	Down	56.6	218.2	Up	10:44:12 - 11:14:12	-3095
Niwot	10:58:31	-26.9	Dark	Down	48.0	230.7	Up	10:43:31 - 11:13:31	-3117
CPSLO	10:59:28	-39.8	Dark	Down	59.7	213.4	Up	10:44:28 - 11:14:28	-3119
SwRI	10:58:31	-27.0	Dark	Down	48.1	230.7	Up	10:43:31 - 11:13:31	-3125
Indian Springs	10:59:09	-35.6	Dark	Down	56.3	220.2	Up	10:44:09 - 11:14:09	-3162
Henderson	10:59:06	-35.2	Dark	Down	56.3	221.7	Up	10:44:06 - 11:14:06	-3237
Searchlight/Boulder City	10:59:06	-35.3	Dark	Down	56.7	222.4	Up	10:44:06 - 11:14:06	-3296
Wildwood	10:59:21	-38.5	Dark	Down	59.7	218.1	Up	10:44:21 - 11:14:21	-3308
Patrick	10:59:03	-34.5	Dark	Down	56.2	224.0	Up	10:44:03 - 11:14:03	-3335
Laughlin/Bullhead City	10:59:06	-35.1	Dark	Down	56.7	223.2	Up	10:44:06 - 11:14:06	-3337
Kingman/Dolan Springs	10:59:04	-34.7	Dark	Down	56.4	223.9	Up	10:44:04 - 11:14:04	-3351
Mohave Valley	10:59:06	-35.1	Dark	Down	56.9	223.5	Up	10:44:06 - 11:14:06	-3364
DCO	10:59:01	-34.0	Dark	Down	56.0	225.3	Up	10:44:01 - 11:14:01	-3388
Idyllwild	10:59:15	-37.1	Dark	Down	59.0	221.5	Up	10:44:15 - 11:14:15	-3408
Lake Havasu City	10:59:06	-35.0	Dark	Down	57.1	224.3	Up	10:44:06 - 11:14:06	-3412
Parker	10:59:06	-35.1	Dark	Down	57.3	224.7	Up	10:44:06 - 11:14:06	-3448
Blythe	10:59:08	-35.4	Dark	Down	57.8	224.9	Up	10:44:08 - 11:14:08	-3491
Calipatria	10:59:12	-36.3	Dark	Down	58.7	224.0	Up	10:44:12 - 11:14:12	-3509
Yuma	10:59:09	-35.7	Dark	Down	58.5	225.9	Up	10:44:09 - 11:14:09	-3582

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 11UH411, (2025/10/19 11:01UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:35:55.3 +16:30:30  0.8 14.74 113
Menkar         03:02:16.8 +04:05:21  2.5 11.45 137
30 Tau         03:48:16.3 +11:08:35  4.8  2.47 125
PPM 146841     03:42:37.2 +08:38:04  7.7  0.45 127
PPM 146863     03:44:04.2 +09:02:59  9.1  0.15 127
11UH411        03:44:06.9 +08:53:55 13.6       127
Positions are for J2000

Event circumstances last updated at 2019/03/23 22:45:51 UT

RECON