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