Asteroid and Minor Planet Occultations from1979 to present.
observed byT. Haymes


Page Updated 2024 Feb 04

HISTORY: Equipment evolution from 1980-2020

Update: From January 2020, I use a C11 XLT on EQ8 with USB3 QHY174m-GPS camera recording to W10.

About : The start and end time of an occultation is found from the light curve shown in the table. Timings are made to an accuray of 0.1 sec (typically), or better if the observing conditions allow. The occultation is recorded by video with GPS time inserted on the frames, which is then analysed using Tangra. There is a user summary here on You Tube


Bar Graph: The proportion in green are the +ve events.
Planetary satellites are in yellow: Titan/28Sgr in 1989 July, and Triton in 2017 Oct.


Table:
Colour code to exposure times: Blue = with a 300mm F4 reflector, Yellow = with a 203mm F4 Schmidt Newtonian, Green = C11 SCT at F/6
dM = drop in magnitudes, from (Asteroid+Star) to Asteroid. From April 2020 the QHY174m-GPS "qhygps" is used in place of WAT910HX.
( bracketed ) = total chords year on year

4 (4) Positive events 2010:

Date
Body
Prediction
Link to report
Observed
duration
Maximum
duration
Magnitude
Star / Astrd

Magnitude
drop

Exposure
Light curve

Chords

Feb 20
(130) Elektra
10.7
16.2 s
11.5 / 12.2
0.9
0.16
Mar 01
(532) Herculina
5.8
23.0 s
10.0 / 8.9
0.33
0.64
One observer
Jun 05
(80) Sappho
6.72
8.1 s
10.7 / 11.7
1.4
0.16
Oct 31
(213) Lilaea
7.1
5.9 s
10.8 / 12.8
2.2
0.64
One Observer

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5 (9) Positive Events 2011:

Date
Body
Prediction
Link to report
Observed
duration
Maximum
duration
Magnitude
Star / Astrd

Magnitude
drop

Exposure
Light curve
Chords
Feb 15
(106) Dione
21.76
36.6
12.7 / 12.3
0.6
0.32
May 03
(42) ISIS
1.76
4.6 s
11.5 / 13.3
2.0
0.16
Sep 14
(48) Doris
14.40
16.3 s
12.3 / 11.2
0.3
0.32
Nov 25
(83) Beartrix
3.84
8.1 s
13.0 / 12.2
0.4
0.16
Chords
Dec 18
(1796) Riga
3.44
8.6 s
11.9 / 16.0
4.1
0.16
Chords

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1 (10) Positive Event 2012:

Date
Body
Prediction
Link to Report
Observed duration
Maximum duration
Magnitude
Star / Astrd
Magnitude drop
Exposure
Light curve
Chords
Feb 23
(41) Daphne
13.6
22.1 s
12.3 / 11.6
0.5
0.16
- - - - - - - - - - -

Positive Events 2013 - NONE

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3 (13) Positive Events 2014

Date
Body
Prediction
Link to Report
Observed duration
Maximum duration
Magnitude
Star / Astrd
Magnitude drop
Exposure
Light curve
Chords
Jan 17
(56)
Melete

Report

1.2
10.2 s
12.0 / 13.1
1.4
0.16
Apr 18
(386)
Siegena

Report

13.8
14.6 s
12.6 / 13.0
(r) 0.9
0.16
One observer

Apr
18

(241)
Germania


NEG
8.5 s
11.9 / 13.7
2.1
0.16

Sept
02

(391)
Ingeborg
-
2.2
2.7 s
12.4 / 12.6
0.9
0.16
Recorded by Adrian Jones

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2 (15) Positive Events 2015:

Date
Body
Prediction
Link to Report

Observed
duration

Maximum
duration
Magnitude
Star / Astrd
Magnitude
drop
Exposure
Light curve
Chords
Sept 30
(275) Sapientia
14.7
18s
7.9 / 13.0
5.0
0.08s

Analysis

Dec 20

6.2
7.3s
9.6 / 13.5
3.9
0.04s

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4 (19) Positive Events 2016:

Date
Body
Prediction
Link to Report

Observed
duration

Maximum
duration
Magnitude
Star / Astrd
Magnitude
drop
Exposure
Light curve
Notes
Feb
16

(423 )
Diotima

29.2
30
13.0 /11.9
0.5
0.16s


8" LXD55
May 23
(583)
Klotilde
1.8
7.2
9.0 / 13.5
3.5
0.08s

Aug 09
(107)
Camilla
18.9
22.9
14 / 12.8
0.4

 

0.08s

 

Oct
10
(268)
Adorea
3.1
3.7
14 / 12.3
1.5

 

0.08s

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5 (24) Positive Events 2017:

Date
Body
Prediction
Link to Report

Observed
duration

Maximum
duration
Magnitude
Star / Astrd
Magnitude
drop
Exposure
Light curve
Notes
Feb
07

(690) Wratislavia

8.4
14.7
12.8/13.1
0.7
0.32


Sep
24
(31) Euphrosyne
7.4
12.2
12.7/11.6
0.3
0.04
Oct 05
TRITON

UTube
142
160
12.7/13.5
1.4

 

0.64

 

Nov
19

(18)
Melpomene
2.64
5
12 / 12.8
0.7

 

0.04

 

Nov 28
(377)
Campania


8.4
9
12 / 13
0.2

 

0.04

 


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8 (32) Positive Events 2018:

Date
Body
Prediction
Link to Report
Observed duration
Maximum duration
Magnitude
Star / Astrd
Magnitude drop(r)
Exposure
Light curve
Chords/Notes
April 21
(130)
Elektra
16.4
20
11.6 / 12.9
1.5
0.04
May 05
(74)
Galatea

7.42
9.5
12.9 / 13.4
0.8
0.08


OW observer chart
Euraster.net chords

Sep 06
(238)
Hypatia


Additional Notes

12.0
13.4
11.2 / 11.9
1.2
0.16


Strong twilight (Sun at -7 deg). Combined Mag 10.7, Barlow x2 used. Frame

Sept
23
(2875)
Largerkvist


Additional Note

0.60
1.0
11 / 16

0.4
Double Star
Comes

0.08

Frame


Sept 26
(1573) Vaisala
0.68
1.0
12 / 13
2.2
0.08

Shift indicated - only one observation in Moonlight
Oct
20
(27561) 2000 KJ1
Three observers got chords across this 20km object. The preliminary Occult profile is elongated.
2.12
2.0
13 / 17
4.0
0.16



Oct
29
(156) Xanthippe
The best UK event of 2018 with 14 observers positive
following an alert to BAA members.
5.70
7.0
12 / 14
2.3
0.04

Nov
02
(137) Maliboea

In strong twilight
4.64
6.0
12.6 / 13
0.5
0.16

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9 (total 41) Positive Events 2019:

Date
MInor Planet
Prediction
Report
Observed duration
Maximum duration
Magnitude
Star / Astrd
Magnitude drop
Exposure
Light curve
Chords
(credit: E. Frappa)
Feb 12
1- (334)
Chicago

W25 red filter used in error.
7.68
12 s
11.8 / 13.0
1.5
0.16

March
8

2- (1093) 2Freda

Laptop bat. failed so used a camcorder.
8.64
13 s
13.2 / 14.0
1.0
0.32

April
2

3- (554)
Paraga
8.6
8.1s
13.9 / 12.6
0.2
small mag. drop
0.16
May
20
4- (671)
Carnegia
1.8
2.0s
11 / 16
5.1
0.08


Jul
22

5- (580)
Selene

The mount was moved 4m East to avoid a tree. Long exposure and low altitude of 13 deg.
Report

0.9
3.0s
12 / 15
dM 2.7
0.32


At 13deg elevation

Jul
26
6- (489) Comacina

Poor weather forecast for this favourable event. Sky cleared 1hr before commencement
Report
youtube

 

11.06

 

10.0s
11 / 13
dM 2.2
0.04s

Jul
28
7- (586)
Thekla

Low altitude and noisy data. Lucky to record this at mag 13 in passing cloud. Report

8.0s
10.0s
13 / 14.5
dM 1.2
0.64s
Nov 07
8- (563)
Suleika
The small magnitude difference of only 0.1 made this a difficult observation. A small dip was recorded in the light curve =>
10 +/- 1s
14 s
14 / 11
dM 0.1
small mag. drop
0.16 s
FIRST Positive event from
Steeple Aston
Nov
30
9- (105)
Artemis
# 9
Using C11 at F4
11.2 s
12.1 s
13.5 / 13.5
dM 0.7
0.16 s
SECOND Positive event from SA.

Usng a C11

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5 (total 46) Positive Events 2020:

Date
Body
Prediction
Report

Observed
duration

Maximum
duration
Magnitude
Star / Astrd
Magnitude
drop
Exposure
Light curve
Notes
Mar 12
1- (996)
Hilaritas


Single frame D-R

 

0.2
Quite likely +ve, but NOT confirmed

2 s
12.9 / 14
3.7

0.2 s

Apr 15
2- (6723) Chrisclark

Cloud stayed away until the last min. The D event was recorded in cloud and the R was uncertain

1.25 +/- 0.4

1.4 s
10 / 17
7.4
0.1 s
qhygps

An observation from the Netherlands confirmed I had observed the same chord.
Jun
25
3- (121) Hermione
Observed at low elivation of 8 degress in the SE. A pole caused the shadow at start of recording.
7.5 +/- 1.1
14 s
11 / 12
0.3

0.64 s
qhygps

Sep
27

4- (110989)
2001US197

unexpected +ve

0.75 +/- 0.1
0.9 s
12 / 19
7

0.1 s
qhygps

 

 

Nov
11

5- (70008)
1998 XA53


two chords from UK

1.30 +/-0.2
1.4 s
13 / 18
4

0.4 s
qhygps

difficult conditions


9
(total 54) Positive Events 2021 - 2 were uncertain. [Table below]

Date
Body
Prediction
Report

Observed
duration

Maximum
duration
Mag.
Star / Astrd
Mag.
drop
Exposure
Light curve
Notes
Jan
22

1- (1076)
Viola


1.3 +/- 0.1

2.8 s
13.8 /14.5
0.9

0.2
qhygps

Mar 13
2- (1342) Brabantia

From the Pulsar observatory.

0.81 +/-0.06

1.0 s
10.3/15
5.5
0.05
qhygps
Apr
17
3- (103)
Hera

Chords
With fit to DAMIT
3D model

1.2 +/-0.3
4.0 s
13/14
0.7

0.15
qhygps

Jun
05

4- (2363)
Cebriones

LuckyStar
Uncertain in Twilight
- probable event
uncomfirmed.
3 ?
6 s
14.2/15.5
2.1

0.4
ghygps

Jun
10

5- (663)
Gerlinde

Low altitude in Del.
Chords
Started recording just in time!
9.5 +/-0.3
12 s
14.1/14.6
1.0

0.5
ghygps

Jly
29

6- (212)
Medea

O?

Difficult conditions
Alt/Az 23/078
in Moonlight and
low mag drop.
3.0 +/- 0.5
4.5 s
14.0/15.0
0.2

0.5
qhygps


Pyote reports:
possible false positive

Aug 23

7- (1434) Margot
S/N of 6 (good) and confirmed positive.
report
3.9 +/- 0.25
5.0 s
13.6/15.0
1.4


0.2

qhygps

 

Sept
20

8- 2002GZ32
Centaur for the lucky-star campaign
27s +/- 1
32 s
13.8 / 19
5

1.0
qhygps


Oct 06

9- (32) Pomona
The star and asteroid formed a pair until the separation closed up. The dip is seen in the blue light curve.
6.9 s +/- 0.2
6 s
12.5 / 13
0.3


0.1

qhygps

 

 

 

 


21
(total 75) Positive Events 2022 (to date)

Date
Body
Prediction
Report

Measured
duration

Maximum
duration
Mag.
Star / Astrd
Mag.
drop
Exposure
Light curve
Notes
Jan
05
1- (96)
Aegle


14 s

16 s
14 / 12.5
0.1

0.33
QHYgps

Jan
12

2- (5022)
Roccapalumba
(Home STN)

1.36 s

2.3 s
11 / 16
6
0.08
QHY gps
Jan 12
3- (5022)
Roccapalumba
(Mobile STN)

2.00s
2.3 s
11 / 16
6

0.08
Wat910HX

Jan
17

4- (37081)
2000 UW59


0.78 s
0.7 s
13 / 17

4

0.12
Wat910HX


Jan
27

5- (212)
Medea


48 +/-5
46 s
13 / 16
0.1

0.5
QHYgps

Jan
29

6- (1654)
Bojeva


1.45
2.5 s
14 / 16
2.1

0.1
QHYgps

Feb
25
7- (3572) Leogoldberg
2.50
2.0 s
13.5 / 15
3.8
0.2
QHYgps

Mar
18

8- (115416)
2003 SP299

0.49
1.3 s
13 / 19
5.9

0.16
QHYgps

Apr
02

9- (145)
Adeona
3.4
4.0 s
14 / 13
0.4
0.25
QHYgps

Apr 15

10- (22) Kalliope
4.56
7 s
13.6 / 11.7
0.3

0.25
QHYgps

May
21

11- (916) America
0.98
1.0 s
11.4 /17
6.0

0.05
QHYgps


Jun 11

12- (149) Medusa

(MOBILE STN)

1.60
+/-0.3
2.4 s
12.8 / 13
0.2

0.32
Wat910HX


Aug
11

13- (2241) Alcathous
Jupiter Trojan
No Times to report


5s ?
8.9 s
12 / 16
3.4

10 s
at 2305UT

Aug
27

14- (1021)
Flammario

3.5 s
4 s
13 / 14

0.7

0.33
QHYgps

Sep
01

15- (780)
Armenia
5.5 +/- 1
10.2 s
15 / 14
0.5

1.0
QHYgps


Sep
30

16- (1347)
Patria

2.18 s
2.0 s
13 / 16
3.0

0.1
QHYgps


Sep
30

17- (1021)
Flammario
6 s +/-1
6 s
12 / 13
0.4

0.2
QHYgps


Oct
03

18- (62029)
2000 RD55
1.28 s
1.4 s
13.7 / 16
3.9


0.16
QHYgps

 

Nov
25

19- (344) Desiderata
7 +/- 2.4
8.0
14.5 / 13

0.15

0.2
QHYgps

Dec
08

20- (8067) Helfenstein
0.42
2.0
12.2 / 16

3.5

0.1
QHYgps

Dec
26

21- (2669) Shostaovich
- 17Km diam.
1.2 +/- 0.1
1.6
13.8 / 17
3.5


0.25
QHYgps

 

13 (88) Positive Events 2023...

tr>
Date
Body
Prediction
Report
Observed duration
Maximum duration
Magnitude
Star / Astrd
Magnitude drop
Exposure
Light curve
Notes
Jan
10
1- (4471) Graculus
0.6 s
1 s
12 / 16
4.2

0.2
QHYgps

Jan 21
2- (505) Cava
9.3 s
13 s
13 / 11.4

0.2

0.1
QHYgps

Feb 10
3- (3687)
Dzus
2.00 s
2 s
13 / 16

3.6

0.2
QHYgps
Feb 19
4- (912) Maritima
6.5 s +/-1
9 s
15 / 14

0.2

0.5
QHYgps
Feb
26

5- (64)
Angelina

12.5 s
14 s
12 / 11

0.2

0.1
QHYgps
Mar
15
6- (393)
Lampetia

Through cloud, data almost lost
4.7 s
5 s
13 / 12

0.3

0.25
QHYgps
May
02
7- (618)
Elfriede
16 s
21 s
14 / 15

0.2

1.0
QHYgps
May
21

8- (5428)
Aizman
1.5 s
2.0 s

4.9

0.1
QHYgps
Aug
06
9- (275)
Sapientia
6.1 s
8 s
12.8 / 13

0.5

0.2
QHYgps

Oct
31
10- (5447)
Lallement
1.3 s
1.7 s
12.7 / 17

4.3

0.1
QHYgps


Nov
07
11- (541)
Deborah
1.6 s
5 s
13 / 15

1.7

0.33
QHYgps

Dec
12
12- (19748)
2000BD5
4.9 s
5 s
12.8 / 18

5

0.2
QHYgps


Dec
12
13- (319)
Leona +
Betelgeuse
5.3s
10 s
0.5 / 14

13

MOBILE 0.04
QHYgps
135 f2.8 lens



6 ( 94 ) Positive Events 2024...

Date
Body
Prediction
Report
Observed duration
Maximum duration
Magnitude
Star / Astrd
Magnitude drop
Exposure
Light curve
Notes
Jan
10
1- (4471) Graculus
0.6 s
1 s
12 / 16
4.2

0.2
QHYgps

Jan
09
2- (3614)
Tumilty
1.9 s
3 s
12.8 / 15.2

2.4

0.2
QHYgps

Jan
17

3- (694)
Ekard
4.82 s
8 s
13.9 / 14.1

0.6

0.2
QHYgps
Jan
18
4- (1712) Angola
2.7 s
4 s
14.8 / 15.3

0.9

0.5
QHYgps
Feb
0
1

5- (1264) Letaba

5.2 s
4.7 s
14.7 / 15.1

0.5

0.5
QHYgps
Feb 02
6- (26648) 2000 LY7
1.3 s
1.9 s
12.2 / 18.8

6.4

0.1
QHYgps