Minor Planet Occultations Observed from 2010 to present.
- recorded byTim Haymes (England, UK)


Last Updated 2022 April 18th

HISTORY: Read about this observers equipment evolution from 1980-2020

Update: From 2019-Nov-30, the OTA is a Celestron 11 on EQ6Pro working at about F5.6. Then from January 2020, I started using the USB3 QHY174m-GPS camera recording to W10 laptop. The WAT-910HX video is still the more sensitive detector andis reserved for more demanding events, but is less convenient to control. In the last few years there has been a Pro-Am collaboration ( Lucky-Star ) to which amateurs can send observations of special interest.


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.


Instrument Setup for video recorded events.


Table:
Colour code to exposure times: Blue = with a 300mm F4 reflector, Yellow = with a 203mm F4 Schmidt Newtonian, Red = 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 dM

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
(334)
Chicago

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

March
8

(1093)
Freda

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

April
2

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


Jul
22

(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
(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
(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
(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 - hooraa !
Nov
30
(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
(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
(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
(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

(110989)
2001US197

unexpected +ve

0.75 +/- 0.1
0.9 s
12 / 19
7

0.1 s
qhygps

 

 

Nov
11

(70008)
1998 XA53


two chords from UK

1.30 +/-0.2
1.4 s
13 / 18
4

0.4 s
qhygps

difficult conditions


7
(total 53) 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
(1076)
Viola


1.3 +/- 0.1

2.8 s
13.8 /14.5
0.9

0.2
qhygps

Mar 13
(1342) Brabantia

From the Pulsar observatory.

0.81 +/-0.06

1.0 s
10.3/15
5.5
0.05
qhygps
Apr
17
(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

(2363)
Cebriones

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

0.4
ghygps

Jun
10

(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

(212)
Medea

O?

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

0.5
qhygps


Pyote reports:
possible false positive

Aug 23

(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 s

qhygps

 

Sept
20

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

1.0 s
qhygps


Oct 06

(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
s
qhygps

 

 

 

 


10
(total 63) Positive Events 2022 (so far)

Date
Body
Prediction
Report

Measured
duration

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


14 s

16
14 / 12.5
0.1

0.33
qhygps

Jan
12

(5022)
Roccapalumba
(Home STN)

1.36 s

2.3
11 / 16
6
0.08
qhygps
Jan 12
(5022)
Roccapalumba
(Mobile STN)

2.00s
2.3
11 / 16
6

0.08 Wat910HX

Jan
17

(37081)
2000 UW59


0.78 s
0.7
13 / 17
4

0.12
Wat910HX


Jan
27

(212)
Medea


48 +/-5
46
13 / 16
0.1

0.5
QHYgps

Jan
29

(1654)
Bojeva


1.45
2.5
14 / 16
2.1

0.1
QHYgps

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

Mar
18

(115416)
2003 SP299

0.49
1.3
13 / 19
5.9

0.16
QHYgps

Apr
02

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

Apr 15

(22) Kalliope
4.56
7
13.6 / 11.7
0.3

0.25
QHYgps

May
21

(912) America
0.98
1.0
11.4 /16
5.0

 

0.05
QHYgps