RECON: TNO occultation with 05UN524

Event between 05UN524 and star UC4-647-039174 with event index number of 93425

Geocentric closest approach at 2017/12/30 08:44:45 UTC

J2000 position of star is 06:35:29.3 +39:15:33
Equinox of date position of star is 06:36:43.7 +39:14:37
Stellar brightness R=15.5, use SENSEUP=128
Star is 42 degrees from the moon. Moon is 89% illuminated.
TNO apparent brightness V=22.0

[RECON map]
TNO is 18.7 AU from the Sun and 17.8 AU from the Earth.
The TNO is moving 23.1 km/sec on the sky relative to the star, or, 6.4 arcsec/hr.
The 1-sigma error in the time of the event is 773 seconds.
The 1-sigma cross-track error in the shadow position is 2232 km.
The sky-plane scale is 12908.1 km/arcsec.

The TNO has an absolute magnitude Hv=9.3
Diameter=84.3 km assuming a 5% albedo -- 3.7 sec chord
Diameter=34.4 km assuming a 30% albedo -- 1.5 sec chord
Dynamical classification is CENTAURR

Star training set for 05UN524, (2017/12/30 08:45UT)
Object            RA         Dec     mag  sep  mel
Pollux         07:46:24.9 +27:58:53  1.1 18.31  54
34Bet Aur      06:00:51.0 +44:56:50  1.9  8.76  39
51 Aur         06:39:54.3 +39:22:24  5.7  0.63  43
PPM 071777     06:34:56.6 +39:25:52  8.1  0.39  42
PPM 071837     06:37:25.2 +38:56:17 10.0  0.33  42
PPM 071804     06:36:01.2 +39:00:08 10.2  0.28  42
05UN524        06:36:44.1 +39:14:37 15.5        42
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 1.2 sigma about the mid-time.
The median site spacing is 24.1 km RECON observability=1.0 and success probability=14.1%

Site Site mid-time
(UT) Sun alt
(deg) Sky Moon Star alt
(deg) Star az
(deg) Target Observing Time
(UT) X-track
(km)

Oroville 08:44:14 -62.8 Dark Up 77.2 225.3 Up 08:29:14 - 08:59:14 3575

Tonasket 08:44:13 -63.0 Dark Up 77.4 226.0 Up 08:29:13 - 08:59:13 3550

Okanogan 08:44:13 -63.3 Dark Up 77.7 226.7 Up 08:29:13 - 08:59:13 3512

Brewster 08:44:14 -63.6 Dark Up 77.9 227.1 Up 08:29:14 - 08:59:14 3480

Manson/Chelan 08:44:15 -63.9 Dark Up 78.3 226.7 Up 08:29:15 - 08:59:15 3451

Entiat 08:44:15 -64.2 Dark Up 78.5 227.3 Up 08:29:15 - 08:59:15 3427

Wenatchee 08:44:15 -64.4 Dark Up 78.7 227.9 Up 08:29:15 - 08:59:15 3398

Ellensburg 08:44:15 -64.9 Dark Up 79.1 228.8 Up 08:29:15 - 08:59:15 3350

Yakima 08:44:15 -65.2 Dark Up 79.3 230.4 Up 08:29:15 - 08:59:15 3306

Pasco 08:44:10 -65.2 Dark Up 78.8 235.9 Up 08:29:10 - 08:59:10 3294

Toppenish/White Swan 08:44:14 -65.4 Dark Up 79.4 231.8 Up 08:29:14 - 08:59:14 3286

PNWRO 08:44:09 -65.3 Dark Up 78.8 237.5 Up 08:29:09 - 08:59:09 3272

George/Umatilla 08:44:10 -65.5 Dark Up 79.1 236.7 Up 08:29:10 - 08:59:10 3255

Goldendale 08:44:15 -66.0 Dark Up 80.0 232.9 Up 08:29:15 - 08:59:15 3219

The Dalles 08:44:16 -66.3 Dark Up 80.3 232.8 Up 08:29:16 - 08:59:16 3189

Maupin 08:44:15 -66.7 Dark Up 80.5 235.1 Up 08:29:15 - 08:59:15 3145

Madras/Culver 08:44:14 -67.2 Dark Up 80.8 237.8 Up 08:29:14 - 08:59:14 3086

Redmond 08:44:14 -67.5 Dark Up 81.0 239.5 Up 08:29:14 - 08:59:14 3046

Sisters 08:44:16 -67.6 Dark Up 81.3 238.2 Up 08:29:16 - 08:59:16 3042

Bend 08:44:14 -67.8 Dark Up 81.2 240.3 Up 08:29:14 - 08:59:14 3021

Oregon Observatory 08:44:15 -68.0 Dark Up 81.4 240.9 Up 08:29:15 - 08:59:15 3000

Niwot 08:43:15 -62.9 Dark Up 70.2 275.9 Up 08:28:15 - 08:58:15 2987

La Pine/Gilchrist 08:44:15 -68.2 Dark Up 81.5 241.9 Up 08:29:15 - 08:59:15 2977

North Lake 08:44:12 -68.4 Dark Up 81.3 246.1 Up 08:29:12 - 08:59:12 2940

Paisley 08:44:10 -68.8 Dark Up 81.3 250.4 Up 08:29:10 - 08:59:10 2886

Chiloquin 08:44:15 -69.3 Dark Up 82.2 247.9 Up 08:29:15 - 08:59:15 2850

Lakeview 08:44:09 -69.2 Dark Up 81.3 253.9 Up 08:29:09 - 08:59:09 2835

Klamath Falls 08:44:14 -69.6 Dark Up 82.3 250.5 Up 08:29:14 - 08:59:14 2814

Tulelake 08:44:13 -69.8 Dark Up 82.2 253.1 Up 08:29:13 - 08:59:13 2790

Cedarville 08:44:08 -69.7 Dark Up 81.3 258.4 Up 08:29:08 - 08:59:08 2767

Fall River/Burney 08:44:12 -70.6 Dark Up 82.3 259.7 Up 08:29:12 - 08:59:12 2693

Susanville 08:44:08 -70.9 Dark Up 81.9 265.2 Up 08:29:08 - 08:59:08 2638

Gimple 08:44:09 -71.2 Dark Up 82.0 267.0 Up 08:29:09 - 08:59:09 2604

Greenville 08:44:09 -71.2 Dark Up 82.1 266.9 Up 08:29:09 - 08:59:09 2603

Quincy 08:44:09 -71.4 Dark Up 82.1 268.3 Up 08:29:09 - 08:59:09 2581

Portola 08:44:07 -71.3 Dark Up 81.8 269.6 Up 08:29:07 - 08:59:07 2576

Reno 08:44:04 -71.3 Dark Up 81.3 271.7 Up 08:29:04 - 08:59:04 2559

Carson City 08:44:04 -71.6 Dark Up 81.2 274.1 Up 08:29:04 - 08:59:04 2521

Yerington 08:44:02 -71.5 Dark Up 80.7 275.4 Up 08:29:02 - 08:59:02 2512

Gardnerville 08:44:03 -71.8 Dark Up 81.2 275.6 Up 08:29:03 - 08:59:03 2495

Hawthorne 08:43:59 -71.6 Dark Up 80.3 278.2 Up 08:28:59 - 08:58:59 2473

Tonopah 08:43:53 -71.3 Dark Up 79.1 280.6 Up 08:28:53 - 08:58:53 2452

Lee Vining 08:44:00 -72.3 Dark Up 80.5 281.6 Up 08:29:00 - 08:59:00 2402

Bishop 08:43:57 -72.5 Dark Up 79.9 284.7 Up 08:28:57 - 08:58:57 2352

Beatty 08:43:51 -71.9 Dark Up 78.5 286.2 Up 08:28:51 - 08:58:51 2338

Indian Springs 08:43:46 -71.6 Dark Up 77.6 287.1 Up 08:28:46 - 08:58:46 2328

Henderson 08:43:43 -71.5 Dark Up 76.9 289.0 Up 08:28:43 - 08:58:43 2287

Lone Pine 08:43:55 -72.9 Dark Up 79.4 288.4 Up 08:28:55 - 08:58:55 2277

Patrick 08:43:38 -71.2 Dark Up 75.8 290.9 Up 08:28:38 - 08:58:38 2248

DCO 08:43:37 -70.9 Dark Up 75.2 291.6 Up 08:28:37 - 08:58:37 2234

Searchlight/Boulder City 08:43:42 -71.8 Dark Up 76.7 291.3 Up 08:28:42 - 08:58:42 2227

Kingman/Dolan Springs 08:43:39 -71.4 Dark Up 75.9 291.8 Up 08:28:39 - 08:58:39 2220

Laughlin/Bullhead City 08:43:41 -71.8 Dark Up 76.3 292.2 Up 08:28:41 - 08:58:41 2204

Mohave Valley 08:43:40 -72.0 Dark Up 76.2 293.2 Up 08:28:40 - 08:58:40 2175

Lake Havasu City 08:43:39 -72.0 Dark Up 75.8 294.5 Up 08:28:39 - 08:58:39 2139

Parker 08:43:38 -72.2 Dark Up 75.7 295.8 Up 08:28:38 - 08:58:38 2102

CPSLO 08:44:03 -75.2 Dark Up 80.8 298.5 Up 08:29:03 - 08:59:03 2084

Blythe 08:43:39 -72.7 Dark Up 75.7 297.9 Up 08:28:39 - 08:58:39 2039

Idyllwild 08:43:47 -74.1 Dark Up 77.2 299.8 Up 08:28:47 - 08:58:47 1999

Wildwood 08:43:54 -75.0 Dark Up 78.7 300.9 Up 08:28:54 - 08:58:54 1995

Calipatria 08:43:41 -73.6 Dark Up 76.1 300.6 Up 08:28:41 - 08:58:41 1963

Yuma 08:43:38 -73.2 Dark Up 75.2 301.0 Up 08:28:38 - 08:58:38 1939

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 05UN524, (2017/12/30 08:45UT)
Object            RA         Dec     mag  sep  mel
Pollux         07:45:18.1 +28:01:33  1.1 18.31  54
34Bet Aur      05:59:31.6 +44:56:51  1.9  8.76  39
51 Aur         06:38:39.5 +39:23:25  5.7  0.63  43
PPM 071777     06:33:41.7 +39:26:46  8.1  0.39  42
PPM 071837     06:36:10.7 +38:57:14 10.0  0.33  42
PPM 071804     06:34:46.6 +39:01:04 10.2  0.28  42
05UN524        06:35:29.3 +39:15:33 15.5        42
Positions are for J2000

Event circumstances last updated at 2017/12/02 17:09:32 UT

Marc W. Buie, Southwest Research Institute

RECON

Site	Site mid-time (UT)	Sun alt (deg)	Sky	Moon	Star alt (deg)	Star az (deg)	Target	Observing Time (UT)	X-track (km)
Oroville	08:44:14	-62.8	Dark	Up	77.2	225.3	Up	08:29:14 - 08:59:14	3575
Tonasket	08:44:13	-63.0	Dark	Up	77.4	226.0	Up	08:29:13 - 08:59:13	3550
Okanogan	08:44:13	-63.3	Dark	Up	77.7	226.7	Up	08:29:13 - 08:59:13	3512
Brewster	08:44:14	-63.6	Dark	Up	77.9	227.1	Up	08:29:14 - 08:59:14	3480
Manson/Chelan	08:44:15	-63.9	Dark	Up	78.3	226.7	Up	08:29:15 - 08:59:15	3451
Entiat	08:44:15	-64.2	Dark	Up	78.5	227.3	Up	08:29:15 - 08:59:15	3427
Wenatchee	08:44:15	-64.4	Dark	Up	78.7	227.9	Up	08:29:15 - 08:59:15	3398
Ellensburg	08:44:15	-64.9	Dark	Up	79.1	228.8	Up	08:29:15 - 08:59:15	3350
Yakima	08:44:15	-65.2	Dark	Up	79.3	230.4	Up	08:29:15 - 08:59:15	3306
Pasco	08:44:10	-65.2	Dark	Up	78.8	235.9	Up	08:29:10 - 08:59:10	3294
Toppenish/White Swan	08:44:14	-65.4	Dark	Up	79.4	231.8	Up	08:29:14 - 08:59:14	3286
PNWRO	08:44:09	-65.3	Dark	Up	78.8	237.5	Up	08:29:09 - 08:59:09	3272
George/Umatilla	08:44:10	-65.5	Dark	Up	79.1	236.7	Up	08:29:10 - 08:59:10	3255
Goldendale	08:44:15	-66.0	Dark	Up	80.0	232.9	Up	08:29:15 - 08:59:15	3219
The Dalles	08:44:16	-66.3	Dark	Up	80.3	232.8	Up	08:29:16 - 08:59:16	3189
Maupin	08:44:15	-66.7	Dark	Up	80.5	235.1	Up	08:29:15 - 08:59:15	3145
Madras/Culver	08:44:14	-67.2	Dark	Up	80.8	237.8	Up	08:29:14 - 08:59:14	3086
Redmond	08:44:14	-67.5	Dark	Up	81.0	239.5	Up	08:29:14 - 08:59:14	3046
Sisters	08:44:16	-67.6	Dark	Up	81.3	238.2	Up	08:29:16 - 08:59:16	3042
Bend	08:44:14	-67.8	Dark	Up	81.2	240.3	Up	08:29:14 - 08:59:14	3021
Oregon Observatory	08:44:15	-68.0	Dark	Up	81.4	240.9	Up	08:29:15 - 08:59:15	3000
Niwot	08:43:15	-62.9	Dark	Up	70.2	275.9	Up	08:28:15 - 08:58:15	2987
La Pine/Gilchrist	08:44:15	-68.2	Dark	Up	81.5	241.9	Up	08:29:15 - 08:59:15	2977
North Lake	08:44:12	-68.4	Dark	Up	81.3	246.1	Up	08:29:12 - 08:59:12	2940
Paisley	08:44:10	-68.8	Dark	Up	81.3	250.4	Up	08:29:10 - 08:59:10	2886
Chiloquin	08:44:15	-69.3	Dark	Up	82.2	247.9	Up	08:29:15 - 08:59:15	2850
Lakeview	08:44:09	-69.2	Dark	Up	81.3	253.9	Up	08:29:09 - 08:59:09	2835
Klamath Falls	08:44:14	-69.6	Dark	Up	82.3	250.5	Up	08:29:14 - 08:59:14	2814
Tulelake	08:44:13	-69.8	Dark	Up	82.2	253.1	Up	08:29:13 - 08:59:13	2790
Cedarville	08:44:08	-69.7	Dark	Up	81.3	258.4	Up	08:29:08 - 08:59:08	2767
Fall River/Burney	08:44:12	-70.6	Dark	Up	82.3	259.7	Up	08:29:12 - 08:59:12	2693
Susanville	08:44:08	-70.9	Dark	Up	81.9	265.2	Up	08:29:08 - 08:59:08	2638
Gimple	08:44:09	-71.2	Dark	Up	82.0	267.0	Up	08:29:09 - 08:59:09	2604
Greenville	08:44:09	-71.2	Dark	Up	82.1	266.9	Up	08:29:09 - 08:59:09	2603
Quincy	08:44:09	-71.4	Dark	Up	82.1	268.3	Up	08:29:09 - 08:59:09	2581
Portola	08:44:07	-71.3	Dark	Up	81.8	269.6	Up	08:29:07 - 08:59:07	2576
Reno	08:44:04	-71.3	Dark	Up	81.3	271.7	Up	08:29:04 - 08:59:04	2559
Carson City	08:44:04	-71.6	Dark	Up	81.2	274.1	Up	08:29:04 - 08:59:04	2521
Yerington	08:44:02	-71.5	Dark	Up	80.7	275.4	Up	08:29:02 - 08:59:02	2512
Gardnerville	08:44:03	-71.8	Dark	Up	81.2	275.6	Up	08:29:03 - 08:59:03	2495
Hawthorne	08:43:59	-71.6	Dark	Up	80.3	278.2	Up	08:28:59 - 08:58:59	2473
Tonopah	08:43:53	-71.3	Dark	Up	79.1	280.6	Up	08:28:53 - 08:58:53	2452
Lee Vining	08:44:00	-72.3	Dark	Up	80.5	281.6	Up	08:29:00 - 08:59:00	2402
Bishop	08:43:57	-72.5	Dark	Up	79.9	284.7	Up	08:28:57 - 08:58:57	2352
Beatty	08:43:51	-71.9	Dark	Up	78.5	286.2	Up	08:28:51 - 08:58:51	2338
Indian Springs	08:43:46	-71.6	Dark	Up	77.6	287.1	Up	08:28:46 - 08:58:46	2328
Henderson	08:43:43	-71.5	Dark	Up	76.9	289.0	Up	08:28:43 - 08:58:43	2287
Lone Pine	08:43:55	-72.9	Dark	Up	79.4	288.4	Up	08:28:55 - 08:58:55	2277
Patrick	08:43:38	-71.2	Dark	Up	75.8	290.9	Up	08:28:38 - 08:58:38	2248
DCO	08:43:37	-70.9	Dark	Up	75.2	291.6	Up	08:28:37 - 08:58:37	2234
Searchlight/Boulder City	08:43:42	-71.8	Dark	Up	76.7	291.3	Up	08:28:42 - 08:58:42	2227
Kingman/Dolan Springs	08:43:39	-71.4	Dark	Up	75.9	291.8	Up	08:28:39 - 08:58:39	2220
Laughlin/Bullhead City	08:43:41	-71.8	Dark	Up	76.3	292.2	Up	08:28:41 - 08:58:41	2204
Mohave Valley	08:43:40	-72.0	Dark	Up	76.2	293.2	Up	08:28:40 - 08:58:40	2175
Lake Havasu City	08:43:39	-72.0	Dark	Up	75.8	294.5	Up	08:28:39 - 08:58:39	2139
Parker	08:43:38	-72.2	Dark	Up	75.7	295.8	Up	08:28:38 - 08:58:38	2102
CPSLO	08:44:03	-75.2	Dark	Up	80.8	298.5	Up	08:29:03 - 08:59:03	2084
Blythe	08:43:39	-72.7	Dark	Up	75.7	297.9	Up	08:28:39 - 08:58:39	2039
Idyllwild	08:43:47	-74.1	Dark	Up	77.2	299.8	Up	08:28:47 - 08:58:47	1999
Wildwood	08:43:54	-75.0	Dark	Up	78.7	300.9	Up	08:28:54 - 08:58:54	1995
Calipatria	08:43:41	-73.6	Dark	Up	76.1	300.6	Up	08:28:41 - 08:58:41	1963
Yuma	08:43:38	-73.2	Dark	Up	75.2	301.0	Up	08:28:38 - 08:58:38	1939