RECON: TNO occultation with 33128

Event between (33128) 98BU48 and star GA1000:03555311
Prediction offset applied: dra=0.0182s, ddec=-0.076", error=[194.794 km,24.8 sec] with event index number of 187876

Geocentric closest approach at 2019/05/01 03:39:25 UTC

J2000 position of star is 11:55:17.5 +11:23:51
Equinox of date position of star is 11:56:17.0 +11:17:24
Stellar brightness G=9.8, use SENSEUP=4
Star is 174 degrees from the moon. Moon is 14% illuminated.
TNO apparent brightness V=22.5

[RECON map]
TNO is 35.4 AU from the Sun and 34.7 AU from the Earth.
The TNO is moving 16.7 km/sec on the sky relative to the star, or, 2.4 arcsec/hr.
The 1-sigma error in the time of the event is 25 seconds.
The 1-sigma cross-track error in the shadow position is 195 km.
The sky-plane scale is 25186.9 km/arcsec.

The TNO has an absolute magnitude Hv=6.9
Diameter=251.2 km assuming a 5% albedo -- 15.0 sec chord
Diameter=102.6 km assuming a 30% albedo -- 6.1 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 

Star training set for 33128, (2019/05/01 03:39UT)
Object            RA         Dec     mag  sep  mel
Regulus        10:09:24.0 +11:52:19  1.3 26.17 153
Denebola       11:50:02.7 +14:27:50  2.1  3.52 171
6 Vir          11:56:02.6 +08:20:11  5.6  2.95 177
PPM 128637     11:55:06.7 +11:56:55  8.4  0.72 174
PPM 128662     11:56:48.5 +11:08:46  9.5  0.19 174
33128          11:56:17.0 +11:17:24  9.8       174
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 30.8 km RECON observability=0.2 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)
Kelowna	03:48:54	-5.7	CT	Down	47.4	146.9	Up	03:46:20 - 03:51:27	1663
Summerland	03:48:55	-5.7	CT	Down	47.5	146.3	Up	03:46:21 - 03:51:29	1633
Penticton	03:48:55	-5.8	CT	Down	47.6	146.4	Up	03:46:21 - 03:51:29	1628
Okanagan Falls	03:48:55	-5.9	CT	Down	47.8	146.3	Up	03:46:22 - 03:51:29	1611
Oliver	03:48:55	-6.0	NT	Down	47.9	146.2	Up	03:46:21 - 03:51:28	1596
Anarchist Mountain Observatory	03:48:55	-6.2	NT	Down	48.1	146.4	Up	03:46:21 - 03:51:28	1582
Oroville	03:48:54	-6.2	NT	Down	48.2	146.2	Up	03:46:20 - 03:51:28	1575
Tonasket	03:48:55	-6.3	NT	Down	48.4	146.1	Up	03:46:21 - 03:51:28	1553
Okanogan	03:48:55	-6.4	NT	Down	48.6	145.6	Up	03:46:21 - 03:51:29	1521
Brewster	03:48:57	-6.4	NT	Down	48.7	145.2	Up	03:46:23 - 03:51:31	1493
Manson/Chelan	03:48:58	-6.3	NT	Down	48.8	144.6	Up	03:46:24 - 03:51:32	1470
Entiat	03:48:59	-6.4	NT	Down	48.9	144.3	Up	03:46:25 - 03:51:32	1448
Wenatchee	03:48:58	-6.5	NT	Down	49.1	144.0	Up	03:46:24 - 03:51:32	1423
Ellensburg	03:49:00	-6.6	NT	Down	49.3	143.4	Up	03:46:27 - 03:51:34	1382
Yakima	03:49:00	-6.8	NT	Down	49.6	143.1	Up	03:46:27 - 03:51:34	1344
Pasco	03:48:55	-7.8	NT	Down	50.5	144.9	Up	03:46:21 - 03:51:28	1328
Toppenish/White Swan	03:49:00	-7.0	NT	Down	49.9	143.2	Up	03:46:26 - 03:51:34	1325
PNWRO	03:48:54	-8.0	NT	Down	50.8	145.0	Up	03:46:20 - 03:51:28	1307
George/Umatilla	03:48:56	-7.8	NT	Down	50.7	144.3	Up	03:46:22 - 03:51:29	1294
Goldendale	03:49:02	-7.0	NT	Down	50.2	142.2	Up	03:46:28 - 03:51:36	1268
The Dalles	03:49:04	-6.9	NT	Down	50.2	141.6	Up	03:46:30 - 03:51:38	1242
Maupin	03:49:03	-7.2	NT	Down	50.6	141.4	Up	03:46:29 - 03:51:37	1203
Madras/Culver	03:49:04	-7.4	NT	Down	51.0	140.9	Up	03:46:30 - 03:51:38	1150
Redmond	03:49:04	-7.6	NT	Down	51.2	140.6	Up	03:46:30 - 03:51:38	1115
Sisters	03:49:06	-7.3	NT	Down	51.0	140.1	Up	03:46:32 - 03:51:40	1113
Bend	03:49:05	-7.6	NT	Down	51.3	140.2	Up	03:46:31 - 03:51:39	1092
Oregon Observatory	03:49:06	-7.6	NT	Down	51.4	139.9	Up	03:46:32 - 03:51:40	1074
La Pine/Gilchrist	03:49:06	-7.6	NT	Down	51.5	139.7	Up	03:46:32 - 03:51:39	1053
North Lake	03:49:04	-8.2	NT	Down	52.1	140.1	Up	03:46:30 - 03:51:37	1018
Paisley	03:49:02	-8.7	NT	Down	52.7	140.2	Up	03:46:29 - 03:51:36	968
Niwot	03:47:51	-19.4	Dark	Down	60.4	163.5	Up	03:45:17 - 03:50:24	946
Chiloquin	03:49:08	-8.0	NT	Down	52.2	138.2	Up	03:46:34 - 03:51:42	940
SwRI	03:47:51	-19.5	Dark	Down	60.5	163.3	Up	03:45:17 - 03:50:24	934
Lakeview	03:49:01	-9.1	NT	Down	53.2	140.0	Up	03:46:28 - 03:51:35	921
Klamath Falls	03:49:08	-8.2	NT	Down	52.5	138.1	Up	03:46:34 - 03:51:42	908
Tulelake	03:49:07	-8.5	NT	Down	52.8	138.2	Up	03:46:33 - 03:51:40	885
Cedarville	03:49:01	-9.6	NT	Down	53.8	139.7	Up	03:46:27 - 03:51:35	858
Fall River/Burney	03:49:06	-9.0	NT	Down	53.5	137.5	Up	03:46:32 - 03:51:40	795
Susanville	03:49:03	-9.8	NT	Down	54.4	138.0	Up	03:46:30 - 03:51:37	741
Gimple	03:49:04	-9.8	NT	Down	54.5	137.4	Up	03:46:31 - 03:51:38	711
Greenville	03:49:05	-9.7	NT	Down	54.4	137.3	Up	03:46:31 - 03:51:39	710
Quincy	03:49:05	-9.8	NT	Down	54.6	137.1	Up	03:46:31 - 03:51:39	690
Portola	03:49:03	-10.2	NT	Down	54.9	137.7	Up	03:46:29 - 03:51:37	683
Reno	03:49:00	-10.8	NT	Down	55.5	138.4	Up	03:46:26 - 03:51:34	665
Carson City	03:49:00	-11.0	NT	Down	55.7	138.1	Up	03:46:26 - 03:51:34	629
Yerington	03:48:57	-11.5	NT	Down	56.2	138.8	Up	03:46:23 - 03:51:30	617
Gardnerville	03:49:00	-11.1	NT	Down	55.9	137.9	Up	03:46:26 - 03:51:33	605
Hawthorne	03:48:54	-12.1	AT	Down	56.8	139.1	Up	03:46:21 - 03:51:28	578
Tonopah	03:48:48	-13.2	AT	Down	57.9	140.8	Up	03:46:14 - 03:51:22	550
Lee Vining	03:48:57	-12.0	AT	Down	57.0	137.8	Up	03:46:23 - 03:51:31	514
Bishop	03:48:53	-12.8	AT	Down	57.8	138.3	Up	03:46:20 - 03:51:27	463
Beatty	03:48:46	-14.1	AT	Down	59.0	140.3	Up	03:46:12 - 03:51:19	439
Indian Springs	03:48:40	-15.0	AT	Down	59.8	141.7	Up	03:46:06 - 03:51:14	421
Lone Pine	03:48:52	-13.4	AT	Down	58.6	138.0	Up	03:46:18 - 03:51:25	390
Henderson	03:48:37	-15.8	AT	Down	60.5	142.3	Up	03:46:03 - 03:51:10	377
Patrick	03:48:31	-16.9	AT	Down	61.6	143.6	Up	03:45:57 - 03:51:04	331
Searchlight/Boulder City	03:48:36	-16.1	AT	Down	61.0	141.8	Up	03:46:02 - 03:51:10	320
DCO	03:48:27	-17.5	AT	Down	62.2	144.5	Up	03:45:53 - 03:51:01	311
Kingman/Dolan Springs	03:48:32	-16.9	AT	Down	61.7	143.0	Up	03:45:58 - 03:51:05	305
Laughlin/Bullhead City	03:48:34	-16.5	AT	Down	61.4	142.0	Up	03:46:00 - 03:51:08	294
Mohave Valley	03:48:34	-16.7	AT	Down	61.7	141.7	Up	03:46:00 - 03:51:08	267
Lake Havasu City	03:48:33	-17.1	AT	Down	62.1	141.7	Up	03:45:59 - 03:51:07	229
CPSLO	03:49:04	-12.3	AT	Down	58.0	132.6	Up	03:46:31 - 03:51:38	221
Parker	03:48:32	-17.3	AT	Down	62.4	141.3	Up	03:45:59 - 03:51:06	193
Blythe	03:48:34	-17.4	AT	Down	62.6	140.2	Up	03:46:00 - 03:51:08	134
Wildwood	03:48:54	-14.3	AT	Down	60.1	134.2	Up	03:46:20 - 03:51:28	123
Idyllwild	03:48:45	-15.8	AT	Down	61.4	136.7	Up	03:46:11 - 03:51:18	114
Calipatria	03:48:38	-17.0	AT	Down	62.5	137.9	Up	03:46:05 - 03:51:12	69
Yuma	03:48:34	-17.8	AT	Down	63.3	138.9	Up	03:46:00 - 03:51:07	38

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 33128, (2019/05/01 03:39UT)
Object            RA         Dec     mag  sep  mel
Regulus        10:08:22.0 +11:58:02  1.3 26.17 153
Denebola       11:49:02.9 +14:34:17  2.1  3.52 171
6 Vir          11:55:03.1 +08:26:38  5.6  2.95 177
PPM 128637     11:54:07.1 +12:03:22  8.4  0.72 174
PPM 128662     11:55:49.0 +11:15:14  9.5  0.19 174
33128          11:55:17.5 +11:23:51  9.8       174
Positions are for J2000

Event circumstances last updated at 2019/04/24 20:13:42 UT

RECON