RECON: TNO occultation with 5145

Event between (5145) Pholus and star GA0740:24291183 with event index number of 1717641

Geocentric closest approach at 2027/06/30 06:09:48 UTC

J2000 position of star is 18:51:24.5 -14:58:53
Equinox of date position of star is 18:52:48.3 -14:57:03
Stellar brightness G=16.8, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 122 degrees from the moon. Moon is 20% illuminated.
Apparent brightness V=22.0

[RECON map]
Object is 30.8 AU from the Sun and 29.8 AU from the Earth.
Apparent velocity is 26.0 km/sec on the sky relative to the star, or, 4.3 arcsec/hr.
The 1-sigma error in the time of the event is 127 seconds.
The 1-sigma cross-track error in the shadow position is 1507 km.
The sky-plane scale is 21634.9 km/arcsec.

The object has an absolute magnitude Hv=7.1
Diameter=229.1 km assuming a 5% albedo -- 8.9 sec chord
Diameter=93.5 km assuming a 30% albedo -- 3.7 sec chord
Dynamical classification is CENTAURR

Star training set for 5145, (2027/06/30 06:10UT)
Object            RA         Dec     mag  sep  mel
Antares        16:31:05.9 -26:29:26  0.9 34.99 156
Nunki          18:56:58.1 -26:15:36  2.0 11.35 123
PPM 235210     18:56:17.6 -15:34:00  4.8  1.01 121
PPM 235132     18:52:57.6 -14:38:58  8.4  0.30 122
PPM 235137     18:53:13.5 -15:08:58  9.5  0.21 122
5145           18:52:58.6 -14:56:49 16.8       121
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 20.3 km RECON observability=0.7 and success probability=17.0%

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

Sleaford 06:10:07 -13.7 AT Down 21.1 161.2 Low 05:59:02 - 06:21:11 -514

Kamloops 06:10:43 -12.0 NT Down 18.5 146.9 Really Low 05:59:39 - 06:21:48 -563

Kelowna 06:10:43 -12.9 AT Down 19.5 147.6 Really Low 05:59:39 - 06:21:48 -597

Peachland 06:10:44 -13.0 AT Down 19.4 147.3 Really Low 05:59:39 - 06:21:48 -602

Summerland 06:10:44 -13.1 AT Down 19.6 147.3 Really Low 05:59:39 - 06:21:48 -609

Penticton 06:10:44 -13.2 AT Down 19.7 147.4 Really Low 05:59:39 - 06:21:48 -612

Oliver 06:10:44 -13.5 AT Down 20.0 147.4 Really Low 05:59:40 - 06:21:49 -628

Anarchist Mountain Observatory 06:10:45 -13.7 AT Down 20.2 147.5 Low 05:59:40 - 06:21:49 -634

Okanogan 06:10:46 -14.2 AT Down 20.7 147.2 Low 05:59:42 - 06:21:51 -665

Victoria 06:10:55 -12.9 AT Down 19.1 143.6 Really Low 05:59:50 - 06:21:59 -667

Brewster 06:10:47 -14.4 AT Down 20.8 146.9 Low 05:59:43 - 06:21:52 -678

Manson/Chelan 06:10:49 -14.5 AT Down 20.9 146.6 Low 05:59:44 - 06:21:53 -689

Wenatchee 06:10:50 -14.9 AT Down 21.2 146.3 Low 05:59:45 - 06:21:54 -712

Ellensburg 06:10:51 -15.2 AT Down 21.5 146.0 Low 05:59:47 - 06:21:56 -733

Yakima 06:10:52 -15.5 AT Down 21.8 145.9 Low 05:59:47 - 06:21:56 -753

Toppenish/White Swan 06:10:52 -15.8 AT Down 22.0 146.0 Low 05:59:48 - 06:21:57 -763

PNWRO 06:10:49 -16.6 AT Down 22.9 147.4 Low 05:59:44 - 06:21:53 -779

The Dalles 06:10:55 -16.2 AT Down 22.4 145.1 Low 05:59:51 - 06:22:00 -805

Maupin 06:10:56 -16.6 AT Down 22.8 145.1 Low 05:59:52 - 06:22:01 -826

Sisters 06:10:58 -17.2 AT Down 23.3 144.4 Low 05:59:53 - 06:22:02 -875

Bend 06:10:57 -17.5 AT Down 23.6 144.6 Low 05:59:53 - 06:22:02 -886

Oregon Observatory 06:10:57 -17.6 AT Down 23.7 144.4 Low 05:59:53 - 06:22:02 -897

Chiloquin 06:10:57 -18.7 Dark Down 24.6 143.7 Low 05:59:53 - 06:22:02 -981

Klamath Falls 06:10:58 -19.0 Dark Down 24.9 143.7 Low 05:59:53 - 06:22:02 -1002

Cedarville 06:10:58 -20.2 Dark Down 26.1 145.0 Low 05:59:53 - 06:22:02 -1029

Fall River/Burney 06:10:57 -20.2 Dark Down 26.0 143.7 Low 05:59:53 - 06:22:02 -1074

Dunrhomin 06:10:19 -25.3 Dark Down 32.5 160.0 Up 05:59:14 - 06:21:23 -1117

Gimple 06:10:58 -21.1 Dark Down 27.0 143.9 Low 05:59:53 - 06:22:02 -1128

Nikitin 06:10:19 -25.5 Dark Down 32.6 160.0 Up 05:59:15 - 06:21:24 -1128

Greenville 06:10:58 -21.1 Dark Down 26.9 143.9 Low 05:59:53 - 06:22:02 -1129

CU-SBO 06:10:19 -25.6 Dark Down 32.7 159.9 Up 05:59:15 - 06:21:24 -1132

Quincy 06:10:57 -21.3 Dark Down 27.1 143.8 Low 05:59:53 - 06:22:02 -1143

Portola 06:10:58 -21.6 Dark Down 27.4 144.2 Low 05:59:53 - 06:22:02 -1144

Reno 06:10:58 -22.0 Dark Down 27.9 144.8 Low 05:59:53 - 06:22:02 -1154

Carson City 06:10:58 -22.4 Dark Down 28.2 144.7 Low 05:59:53 - 06:22:02 -1178

Yerington 06:10:58 -22.8 Dark Down 28.7 145.2 Low 05:59:53 - 06:22:02 -1184

Gardnerville 06:10:58 -22.6 Dark Down 28.4 144.7 Low 05:59:53 - 06:22:02 -1194

Hawthorne 06:10:58 -23.4 Dark Down 29.3 145.6 Low 05:59:53 - 06:22:02 -1210

Lee Vining 06:10:58 -23.7 Dark Down 29.5 145.0 Low 05:59:53 - 06:22:02 -1253

Bishop 06:10:57 -24.5 Dark Down 30.3 145.5 Up 05:59:53 - 06:22:02 -1287

Beatty 06:10:57 -25.5 Dark Down 31.5 147.0 Up 05:59:53 - 06:22:02 -1309

Patrick 06:10:52 -27.8 Dark Down 33.9 149.4 Up 05:59:48 - 06:21:57 -1408

Laughlin/Bullhead City 06:10:55 -27.8 Dark Down 33.9 148.6 Up 05:59:50 - 06:21:59 -1425

Lake Havasu City 06:10:55 -28.5 Dark Down 34.5 148.6 Up 05:59:50 - 06:21:59 -1472

George/Scottsdale 06:10:48 -30.0 Dark Down 36.2 151.0 Up 05:59:44 - 06:21:53 -1528

Wildwood 06:10:58 -27.3 Dark Down 32.9 144.1 Up 05:59:53 - 06:22:02 -1530

Idyllwild 06:10:58 -28.4 Dark Down 34.1 145.9 Up 05:59:53 - 06:22:02 -1532

Calipatria 06:10:58 -29.3 Dark Down 35.2 146.9 Up 05:59:53 - 06:22:02 -1570

Yuma 06:10:57 -30.0 Dark Down 35.9 147.6 Up 05:59:53 - 06:22:02 -1599

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 5145, (2027/06/30 06:10UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9 34.99 156
Nunki          18:55:15.9 -26:17:49  2.0 11.35 123
PPM 235210     18:54:43.1 -15:36:12  4.8  1.01 121
PPM 235132     18:51:23.7 -14:41:02  8.4  0.30 122
PPM 235137     18:51:39.3 -15:11:02  9.5  0.21 122
5145           18:51:24.5 -14:58:53 16.8       122
Positions are for J2000

Event circumstances last updated at 2024/06/21 21:29:30 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)
Sleaford	06:10:07	-13.7	AT	Down	21.1	161.2	Low	05:59:02 - 06:21:11	-514
Kamloops	06:10:43	-12.0	NT	Down	18.5	146.9	Really Low	05:59:39 - 06:21:48	-563
Kelowna	06:10:43	-12.9	AT	Down	19.5	147.6	Really Low	05:59:39 - 06:21:48	-597
Peachland	06:10:44	-13.0	AT	Down	19.4	147.3	Really Low	05:59:39 - 06:21:48	-602
Summerland	06:10:44	-13.1	AT	Down	19.6	147.3	Really Low	05:59:39 - 06:21:48	-609
Penticton	06:10:44	-13.2	AT	Down	19.7	147.4	Really Low	05:59:39 - 06:21:48	-612
Oliver	06:10:44	-13.5	AT	Down	20.0	147.4	Really Low	05:59:40 - 06:21:49	-628
Anarchist Mountain Observatory	06:10:45	-13.7	AT	Down	20.2	147.5	Low	05:59:40 - 06:21:49	-634
Okanogan	06:10:46	-14.2	AT	Down	20.7	147.2	Low	05:59:42 - 06:21:51	-665
Victoria	06:10:55	-12.9	AT	Down	19.1	143.6	Really Low	05:59:50 - 06:21:59	-667
Brewster	06:10:47	-14.4	AT	Down	20.8	146.9	Low	05:59:43 - 06:21:52	-678
Manson/Chelan	06:10:49	-14.5	AT	Down	20.9	146.6	Low	05:59:44 - 06:21:53	-689
Wenatchee	06:10:50	-14.9	AT	Down	21.2	146.3	Low	05:59:45 - 06:21:54	-712
Ellensburg	06:10:51	-15.2	AT	Down	21.5	146.0	Low	05:59:47 - 06:21:56	-733
Yakima	06:10:52	-15.5	AT	Down	21.8	145.9	Low	05:59:47 - 06:21:56	-753
Toppenish/White Swan	06:10:52	-15.8	AT	Down	22.0	146.0	Low	05:59:48 - 06:21:57	-763
PNWRO	06:10:49	-16.6	AT	Down	22.9	147.4	Low	05:59:44 - 06:21:53	-779
The Dalles	06:10:55	-16.2	AT	Down	22.4	145.1	Low	05:59:51 - 06:22:00	-805
Maupin	06:10:56	-16.6	AT	Down	22.8	145.1	Low	05:59:52 - 06:22:01	-826
Sisters	06:10:58	-17.2	AT	Down	23.3	144.4	Low	05:59:53 - 06:22:02	-875
Bend	06:10:57	-17.5	AT	Down	23.6	144.6	Low	05:59:53 - 06:22:02	-886
Oregon Observatory	06:10:57	-17.6	AT	Down	23.7	144.4	Low	05:59:53 - 06:22:02	-897
Chiloquin	06:10:57	-18.7	Dark	Down	24.6	143.7	Low	05:59:53 - 06:22:02	-981
Klamath Falls	06:10:58	-19.0	Dark	Down	24.9	143.7	Low	05:59:53 - 06:22:02	-1002
Cedarville	06:10:58	-20.2	Dark	Down	26.1	145.0	Low	05:59:53 - 06:22:02	-1029
Fall River/Burney	06:10:57	-20.2	Dark	Down	26.0	143.7	Low	05:59:53 - 06:22:02	-1074
Dunrhomin	06:10:19	-25.3	Dark	Down	32.5	160.0	Up	05:59:14 - 06:21:23	-1117
Gimple	06:10:58	-21.1	Dark	Down	27.0	143.9	Low	05:59:53 - 06:22:02	-1128
Nikitin	06:10:19	-25.5	Dark	Down	32.6	160.0	Up	05:59:15 - 06:21:24	-1128
Greenville	06:10:58	-21.1	Dark	Down	26.9	143.9	Low	05:59:53 - 06:22:02	-1129
CU-SBO	06:10:19	-25.6	Dark	Down	32.7	159.9	Up	05:59:15 - 06:21:24	-1132
Quincy	06:10:57	-21.3	Dark	Down	27.1	143.8	Low	05:59:53 - 06:22:02	-1143
Portola	06:10:58	-21.6	Dark	Down	27.4	144.2	Low	05:59:53 - 06:22:02	-1144
Reno	06:10:58	-22.0	Dark	Down	27.9	144.8	Low	05:59:53 - 06:22:02	-1154
Carson City	06:10:58	-22.4	Dark	Down	28.2	144.7	Low	05:59:53 - 06:22:02	-1178
Yerington	06:10:58	-22.8	Dark	Down	28.7	145.2	Low	05:59:53 - 06:22:02	-1184
Gardnerville	06:10:58	-22.6	Dark	Down	28.4	144.7	Low	05:59:53 - 06:22:02	-1194
Hawthorne	06:10:58	-23.4	Dark	Down	29.3	145.6	Low	05:59:53 - 06:22:02	-1210
Lee Vining	06:10:58	-23.7	Dark	Down	29.5	145.0	Low	05:59:53 - 06:22:02	-1253
Bishop	06:10:57	-24.5	Dark	Down	30.3	145.5	Up	05:59:53 - 06:22:02	-1287
Beatty	06:10:57	-25.5	Dark	Down	31.5	147.0	Up	05:59:53 - 06:22:02	-1309
Patrick	06:10:52	-27.8	Dark	Down	33.9	149.4	Up	05:59:48 - 06:21:57	-1408
Laughlin/Bullhead City	06:10:55	-27.8	Dark	Down	33.9	148.6	Up	05:59:50 - 06:21:59	-1425
Lake Havasu City	06:10:55	-28.5	Dark	Down	34.5	148.6	Up	05:59:50 - 06:21:59	-1472
George/Scottsdale	06:10:48	-30.0	Dark	Down	36.2	151.0	Up	05:59:44 - 06:21:53	-1528
Wildwood	06:10:58	-27.3	Dark	Down	32.9	144.1	Up	05:59:53 - 06:22:02	-1530
Idyllwild	06:10:58	-28.4	Dark	Down	34.1	145.9	Up	05:59:53 - 06:22:02	-1532
Calipatria	06:10:58	-29.3	Dark	Down	35.2	146.9	Up	05:59:53 - 06:22:02	-1570
Yuma	06:10:57	-30.0	Dark	Down	35.9	147.6	Up	05:59:53 - 06:22:02	-1599