2014 - Minor Planet Photometry

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2014

Photometry


Obs Code

Name

Longitude

Latitude

Altitude

Time (UT)

E17

Leura

150d 20' 30"

-33d 42' 22"

950m

+10h

E19

Kingsgrove

151d 5' 45"

-33d 56' 51"

60m

+10h

Q68

BMO

150d 20' 30"

-33d 42' 22"

950m

+10h

Telescope

Mount

f/ratio

Focuser

Camera

Location

SCT 0.25m

G11 Gemini v2

5.2

none

ST402ME

E19

SCT 0.35m

Paramount MX

6

TCF

ST8XME

E17

CDK 0.61m

MI-1250 Fork

6.8

Planewave

U16M

Q68

Bracket next to Date Range indicate the location and system used. All period are light time corrected. An asterisk (*) after the name indicate published light curve in Minor Planet Bulletin.
Text colour correlate to the instrument system used for data aquisition.
PSABA: Photometric Survey of Asynchronous Binary Asteroids CALL: Collaborative Asteroid Light curve Link

1796 Riga. Equal amount of sessions were used to observe this target using the 0.35m and 0.25m telescope.the internal linkages were used.

1741 Giclas

788 Hohensteina

This target was worked on in 2008 by Oey et al. The result at the time without the benefit of CSS (internal linkages) show a period of 37.176h. The 2014 apparition show a clear sign of tumbling. I invite more observation for the next apparition for a campaign to get a sufficient number data for period analysis for tumbling.

788 Hohenstaina 43h
788 Hohenstaina 33h

2110 Moore-Sitterly

A paired asteriod. This study is part of the PSABA observing campaign to learn about the evolution of binary asteroid formations. One observation per lunation frequency

749 Malzovia

2691 Sersic
Primary period

2691 Sersic. Long period showing events of the binary asteroid eclipses

1706 Dieckvoss. Data was mainly obtained using the 0.35m telescope supported by 0.25m telescope on 3 occasions. some data points from 0.25m has  to be deleted due to poor  accuracy.

1796_Riga. Most sessions (8) were taken using the 0.25m scope and the later 7 sessions were with 0.35m scope. The zero point was adjusted on some session.

2002 Eurler

3309 Brorfelde

4563 Kahnia

Single periodic.
PSABA target

2478 Tokai. Part observations was to support during the binary asteroid event.
The light curve only represents the dip during 0.25 phase and 0.75 phase. Orbital period is shown.

4765 Wasserburg

Showed a much lower amplitude than in the previous apparitions. The current aspect is not far from pole-on.

5647 1990 TZ
Canopus CSS does not show a reliable and correct internal linkages. Fortunately the night starting from January 28th and for the next consecutive nights ending on the 1st of February, the asteroid is in a stationary position. That allow differential photometry work to be done using same comparison stars. The result show the period of 6.13h for assumed bimodal light curve with no noticable vertical displacement.
The light curve was measured for the month of January only obtaining an amplitude of 0.11m. With such low amplitude, the period may not be unique.  However data obtained on 13/11/14 and 13/12/08 show an amplitude at lease 0.4mag making the minor planet nature more uniquely bimodal.

There appears to have a long period component within the lightcurve. however we are unable to identify it with the available data. The corresponding data are linked using common comparison stars because the asteroid is in stationary motion.

4555 1987 QL

this light curve showing characteristics of 2 periodic system.  Unable to resolve it at current data.

5647 1990 TZ
Larger amplitude of at least 0.4m for the november and december data suggest a reasonable bimodal asteroid of period 6.13h

5510 1988 RF7

One session data only. Derived period is an indication only.

6944 1979 MR3.

8107 1995 BR4

PSABA

6181 Bobweber

10208 Germanicus

PSABA target. Started by Ondrejov and the data was taken supposed to be completely within an event. However the following data obtained here has not captured any of the events yet. More data is needed in future apparition.

8091 1992 BG. Most observations were done using the  0.61m telescope with 2 sessions supported by 0.35m scope.

10597 1996 TR10

18082_2000_GB136
The target has been found to be in commensurate with earth 24h rotation after 4 sessions of observations.
this target will need to be revisited with collaborative effort from different geographical locations. Observed mainly with 0.35m telescope but supported with the 0.61m on the last session.

18787 Kathermann. Taken mainly with C14 telescope but supported by CDK24

20470 1999 NZ5

Only 1 session obtained and provisional period is shown.
PSABA target. No deviation seen.

25327 1999 JB63

27300 2000 AA168

39796 1997 TD

56436 2000 GZ46

PSABA target but cannot get sufficient data to provide a reliable solution.

388468 2007 DB83

C_2014_E2_Jacques.
My novice attempt to observe  this comet's rotational period.
As can be seen form this light curve , it has a very small amplitude supporting the view (private communication with Dr. Pravec) that the gas and dust forming the coma has overwhelm the variation in the brightness as the comet rotate.
comets will be observable for photometric data only when they are not active.

No.

Asteroid

H

Period

PE

Amplitude

AE

diameter

Class

PA

LPAB

BPAB

788

Hohensteina

8.60

37.7

0.1

0.2

0.05

105.15

C

13.4, 16.5

274

17

749

Malzovia

11.82

5.9275

0.0002

0.30

0.02

13.55

S

10.7

245

6.4

1706

Dieckvoss

12.90

2.58944

0.00005

0.12

0.03

8.26

C

13.0, 11.0

217.2, 220.2

-2.6, -2.3

1741

Giclas

11.40

3.107

0.001

0.12

0.02

28.96

S

4.1

160.9

3.4

1796

Riga

9.84

22.226

0.001

0.40

0.05

59.40

S

7.3, 15.0

142

-20, -15.8

2002

Eurler

12.30

5.993

0.004

0.30

0.02

10.86

S

20

298

10

2110

Moore-Sitterly

13.20

3.34

0.02

0.51

0.02

7.18

S

24.5

321.6

0.3

2691

Sersic

13.10

37.72

0.1

0.2

0.05

7.51

S

26.5, 24.5

198.2, 204.6

-3.3

2478

Tokai

12.00

25.97 (Porb)

0.01

1.0

0.01

12.47

S

7.0, 10.0

206.9, 207.2

-1.8, -1.6

4555

1987 QL

13.80

2.8848

0.0002

0.26

0.02

5.44

S

6.4, 30.6

307.9, 328.1

6.4, -0.8

4563

Kahnia

13.20

12.416

0.002

0.44

0.01

7.18

S

7.4, 4.9

18.6, 19.5

-6.6, -6.8

4765

Wasserburg

13.70

3.6280

0.0005

0.07

0.02

5.70

S

17.3, 11.3, 11.7

45.7, 45.8

-21, -16.8

5647

1990 TZ

12.00

6.13979

0.00001

0.11

0.02

12.47

S

13.9, 26.5

88.7, 96.2

-14.3, -24

5510

1988 RF7

13.40

3.21

0.45

0.05

0.01

6.54

S

24.8

347.4

-6.6

6181

Bobweber

12.50

2.7576

0.0001

0.15

0.01

6.25

S

4.4, 17.7

101.7, 104.7

4.4, 1.7

6944

1979 MR3

14.20

2.9126

0.0002

0.16

0.05

4.53

S

8.6, 20.2

245.6, 248.4

8.9, 7.3

8091

1992 BG

13.70

8.5626

0.0003

1.11

0.05

5.70

S

21.4, 10.1

246.7, 250.4

13.6, 14.2

8107 1995 BR4 13.80 6.9786 0.0005 0.38 0.02 5.44 S 13.0, 4.3, 7.2 104, 105.6 -7.6, -6.4

10208

Germanicus

14.40

3.1291

0.0002

0.10

0.02

4.13

S

8.2, 4.9

45.6, 46.6

0.2, -0.6

10597

1996 TR10

13.00

6.5969

0.0003

0.30

0.01

7.87

S

12.5, 8.9, 12.5

228.4, 230.2

13.3, 14.8

18082

2000 GB136

14.20

11.94

0.02

0.73

0.05

4.53

S

17.0, 14.8

278.7, 279.4

-3.2, -3.6

18787

Kathermann

14.60

41.801

0.004

1.00

0.05

3.77

S

5.9, 22.1

213.6.219.5

7.6, 2.9

25327

1999 JB63

13.90

6.7165

0.0006

0.63

0.05

5.20

S

7.3, 9.8

213.7, 214.6

11.5, 9.9

20470

1999 NZ5

13.50

3.634

0.028

0.24

0.02

6.25

S

14.8

299.8

12.5

27300

2000 AA168

13.70

6.3207

0.0005

0.93

0.02

5.70

S

7.5

247.1

12.8

39796

1997 TD

15.70

3.854

0.002

0.09

0.02

2.27

S

28.6

44.3

-19.7

56436

2000 GZ46

14.70

3.92

0.05

0.23

0.04

3.60

S

7.1

307.3

8.1

388468

2007 DB83

18.29

5.4138

0.0002

1.00

0.03

0.69

S

22.6, 0.3, 3.8

223.6, 236.5

11.5, -1.6

 
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