Light curves of asteroid periods found in 2008. All period are light time corrected.
The criteria for target selection in Kingsgrove observatory were
mainly for its favourable opposition brightness and also its
southerly location due to local restrictions to the observatory’s northern
horizon. Observing is useful for photometry in dark sky(moonless) to about
14.5magnitude. Leura observatory limiting magnitude is 17.5magnitude with
precision of <0.03m.
1. SCT 0.25m f/5.2 (Meade focal reducer) , CCD Camera SBIG ST402ME
Location E19
2. SCT 0.35m f/7 (Lumicon Giant Easy Guider reducer) , CCD camera SBIG ST 9 XE Location E17
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.
| 178 Belisana* |
|
Date range: 31/08 - 22/09 Period: 12.3264h + 0.0008h
Amplitude: 0.22m + 0.02m |
H=9.38: D=41.68: Albedo=0.180: Class=S PA=17.9
LPAB=19.2:BPAB =-1.5 |
Second attempt for 178 Belisana on its 2008 apparition. This time
observations will be by Frederick Pilcher from Organ Mesa observatory
USA along with another observer,Vladimir
Benishek from Serbia. We will form a long baseline that
will resolve the ambiguity that was found in the
2007 apparition published in MPB 35-3.
178 Belisana mean PAB in 2007 is 246.5. A difference of about 130 deg from
2008 apparition. If in 2007 the aspect is pole-on then the 2008 apparition
the asteroid is tilted at about 45 latitude. Which means that as
observations progressed through opposition this year, amplitude will be
reduced further and eventually the first harmonic will start to dominate
showing only a monomodal lightcurve. My data obtained on 31/08 and 01/09
was linked by using the same comparison stars on both nights. The current lightcurve is most likely be bimodal. |
| 226 Weringia* |
 |
Date range: 06/11 - 22/12 Period: 11.149h + 0.002h
Amplitude: 0.15m + 0.02m |
H = 9.70:D = 48.25: Albedo = 0.100: Class = SC PA=10.4, 6.9, 10.9
Lpab=65 : Bpab=-18 |
Returning follow up target. Previous work Oey(2007) suggest a period of
11.240h +/- 0.002h |
| 315 Constantia* |
 |
Date range: 02/07 - 03/07(1) Period: 5.345h +
0.003h
Amplitude: 0.60m + 0.02m |
H = 13.20: D=7.18: Albedo = 0.180: Class=S PA= 19.5
LPAB= 246 : BPAB=3 |
Target of opportunity in the same field as 2066 Palala. Previous period
derived by Behrend
et al.(2008) at 5.37h with U=2- with amplitude of 0.11m showing a
monomodal light curve indicating a polar orientation. Current work showing a
more favourable orientation showing a large amplitude bimodal lightcurve . |
| 357 Ninina |
 |
Date (2007): 13/07 - 11/08 Period : 53.63h + 0.02h
Amplitude: 0.24m + 0.02m
Date (2008): 08/10 - 12/10
Period: insufficient data
Amplitude : insufficient data |
H= 8.72: D= 99.5km: Albedo= 0.058: Class= C PA(07) = 7, 1, 3
Lpab(07)= 310: Bpab= 3
PA(08)= 19
Lpab(08)=50: Bpab= -15 |
The low amplitude and unclear period obtained for the 6 hour session in
2008 shows no changes compare to the 2007 result. The lack of clear light
curve shape and the availability of the new Canopus version 9.5.0.10 with the
comp star selector module prompt me to reprocess the data. Once internally linked to the correct zero
point, the analysis showing the period of 53.63h in contrast with the
previously found period of 34.97h by Behrend et al. Further observation will
be conducted to determine the correct period during the next apparition/opposition
on the 27th Jan 2010. |
| 552 Sigelinde* |
 |
Date range:11/04/08 - 03/05/08 (1) Period: 17.156h + 0.002h
Amplitude: 0.18m +
0.03m |
H=9.39: D=73km: Albedo=0.058: Class=C PA=14.2 - 8.9 LPAB=240: BPAB=
-5 |
CALL targets and the usual selection criteria. |
| 677 Aaltje* |
 |
Date range: 15/07 - 29/08 Period: 16.6076h + 0.0006h
Amplitude: 0.30m + 0.02m |
H=9.70: D= 63 : Albedo= 0.058: Class = C PA= 15.9
LPAB= 339.8
BPAB= 8.4 |
Call target in 2007. Followed up work in 2008 apparition.
The 2007 data was plagued with numerous background stars and the inevitable
short sessions. The 2008 data taken on 15/07 and 17/07 were linked using the same
comparison stars. So does the data on 17/07 and that on 18/07. This confined
the period to 16.7 and later confirmed with subsequent collection of data.
The bimodal light curve formed fit well with a period of 16.6076h. |
| 741 Botolphia |
 |
Date range: 30/05 - 31/05(1) Period: 23.24h
Amplitude: 0.2m |
|
CALL target. |
| 788 Hohensteina* |
 |
Date range: 11/04/08 - 31/05/08(1) Period : 37.176h + 0.004h Amplitude:
0.18m + 0.03m |
H = 8.3 : Dia= 120 : Albedo = 0.058 : Class = C PA (2008): 8.2 - 12.8 LPAB(2008):
220 BPAB(2008): 12 |
CALL targets. Previous data shows a period of
11.16h+/-0.09h(Behrend
et al.(2008)). Work in collaboration
with Dr. Michael
Fauerbach. 3 nights of combined long
run between US and Australia allow us to constrain the period to the one
described here. Any further refinement of period has to be done in the next
apparition perhaps with collaboration with even wider geographical location.
Indication of NPA rotation (Harris private
correspondence). |
| 929 Algunde* |
 |
Date range: 30/07 - 02/08 Period: 3.3110h + 0.0008h
Amplitude: 0.13m + 0.02m |
H = 12.10: Dia = 11.91: Albedo = 0.180 : Class =S PA: 15
LPAB = 340: BPAB =8.5 |
PSABA target. Second apparation. |
| 1122 Neith* |
 |
Date range:31/08 - 29/09 Period: 12.599h + 0.006h
Amplitude: 0.08m + 0.02m |
H=11.10:Dia=18.88: Albedo=0.180:Class=S PA=18.2
LPAB = 6.7:BPAB=-6.1 CALL target |
Since observations/project was completed for 788 Hohensteina, work
has been done revolving around multiple sessions with common comparison
stars ie internal linkages spanning multiple sessions. The criteria to start
an observation of a target will be to begin around 1-2 months prior to
opposition. During this time the asteroid is in the inflection path toward
retrograde motion and it appear stationary for a few days. If the target
turn out to be a slow rotator, the few continuous observing sessions can be
linked and amplitude with the initial segment of the light curve can also be
determined.
Session 883 consist of data from 31/08 and 01/09, session 898 consist of
data from 10/09 and 11/09. Current observing run includes 178 Belisana, 2543 Machada, 4332 Milton |
| 1449 Virtanen* |
 |
Date range: 30/05 - 08/07 (1) Period: 30.495h +
0.005h
Amplitude: 0.60m + 0.02m |
H = 12.4: Dia = 10.37: Albedo = 0.180 : Class =S PA = 5.8
- 22.8
LPAB = 245.1 - 250.6
BPAB = 7.2 - 4.5 |
CALL target. Long period. Period constrained when multiple sessions were
linked together due to target slow movement sharing common comparison stars. |
| 1563 Noel* |
 |
Number of sessions:3 Date range: 03/04 - 05/04 (2)
Period: 3.5490h + 0.0008h
Amplitude: 0.15m +
0.02m |
H=13.30:Dia=6.85: Albedo=0.180:Class=S
PA=4:
LPAB=198: BPAB=5
Data Points:167
|
Photometric Survey for Asynchronous Binary Asteroid target. |
| 1638 Ruanda* |
 |
Number of sessions: 5
Date range: 11/05 - 23/06 (1)
Period: 4.2397h + 0.0002h
Amplitude: 0.10m + 0.02m |
H=11.50:D=21.06: Albedo=0.100:Class=SC PA=11.2 - 0.2 - 9.9
LPAB=251 - 254
BPAB=0
Data Points: 247
|
Call target. No known period. Fit well into a trimodal curve. Initially
shown to be a bimodal light curve of period 3.157h appear to be caused by
significant error from earlier poor quality data. This also caused the
false detection of an event. |
| 1785 Wurm* |
 |
Number of sessions: 2 Date range: 03/03 - 06/03 (2)
Period: 3.2696h + 0.0004h
Amplitude: 0.30m +
0.01m |
H=13.2:D=7.18: Albedo=0.180: Class=S PA=5:
LPAB=171: BPAB=-5
Data Points:161
|
Photometric Survey for Asynchronous Binary Asteroid target. |
| 1836 Komarov* |
 |
Date range: 11/07 - 15/07 (1) Period: 8.081h +
0.002h
Amplitude: 0.39m + 0.02m |
H = 11.30: Dia = 23.10 : Albedo = 0.100 : Class = SC PA =3
LPAB = 287.7 : BPAB = 2.5 |
CALL target. |
| 2193 Jackson* |
 |
Date range: 12/04 - 29/04 (1) Period: 4.7541h + 0.0005h
Amplitude: 0.23m +
0.03m |
H=10.30: D=48km: Albedo=0.058: Class=C PA= 9.8 - 3.3 LPAB=226: BPAB=
-1 |
CALL target. No previous known period. Observation finalised with U=3 |
| 2066 Palala* |
 |
Date range: 27/06 - 03/07(1) Period: 9.730h +
0.002h
Amplitude: 0.65m + 0.03m |
H=12.50: D=19km~: Albedo= 0.0491: Class=S PA= 17.6-19.8
LPAB= 246: BPAB= 3.4 |
CALL target. No previous known period. |
| 2478 Tokai |
 |
Date range: 27/06/08 - 21/07/08 (2) Period: 25.88h + 0.01h
Amplitude(prim): 0.40m
Date range:26/01/07 - 05/02/07 (2)
|
H=12.8: D=8.63km: Albedo = 0.180: Class =S PA = 9.7 - 3.8
LPAB = 293 : BPAB = 5 |
PSABA target. Synchronous binary follow up work. |
| 2543 Machado |
 |
Period: 5.308h + 0.003h Amplitude: 0.02m |
H=11:Dia=34.82: Albedo=0.058: Class=C PA=17.0
LPAB=8.1:BPAB=-13.2 |
Amplitude is very low at about 0.02m. Period is difficult to determine.
Better precision data was obtained on 20-09-08 with a session length of
7.5h. While large spread still present(0.02m), it shows an amplitude of
0.02m with bimodal curve and if it was a polar aspect in 2007, the amplitude
should be different and larger in 2008. Therefore with such persistent low
amplitude a longer period light curve may be more likely. Further
observations should be done to constrain the synodic period. |
| 2777 Shuksin |
 |
Date range: 27/08- 28/08 Period: 3.87h + 0.02h
Amplitude: 0.05m + 0.03m |
H = 13.10: Dia= 7.51: Albedo= 0.180: Class=S PA=14.7
Lpab=6.6 :Bpab= -3.8 |
Target in the same field as 15268 1990 WF3. Only managed to cover the 2
nights. Period could either be the 3.88h or possibly long rotation period of
more than 100h based on data supplied by R. Stephens. Other collaborators
are S. Gajdos and P. Kusnirak, |
| 3576 Galina* |
 |
Date range:01/10-08/10 Period: 5.910h + 0.003h
Amplitude: 0.04m + 0.01m |
H=13.10:D=7.51: Albedo=0.180:Class=S PA=3
LPAB= 9 BPAB=
-3 |
PSABA target. |
| 4182 Mount Locke* |
 |
Date range: 13/08 - 02/09 Period: 3.0175h + 0.0003h
Amplitude: 0.15m + 0.03m |
H=12.20:D=15.26km: Albedo=0.100:Class=SC PA= 5.0 - 9.2
LPAB=323 : BPAB=9.5 |
Target was suggested by Behrend as a suspect binary. attenuation noted
at the end of session 868 is associated with poor atmospheric condition at
an altitude of about 30deg. This color effect was later reprocessed and
removed that eventually neutralise the light curve. |
| 4332 Milton* |
 |
Date range: 31/08 - 11/09 Period: 3.2978h + 0.0003h
Amplitude: 0.30 +
0.05m |
H=11.90: D=13.06km: Albedo=0.180: Class=S PA=28 - 24
Lpab=18 - 21: Bpab= -10 |
CALL target. No specific aim accept that its part of observations with
178 Belisana. |
| 5034 Joeharrington* |
 |
Date range:02/05 - 06/05(1) Period: 8.417 + 0.004h
Amplitude:0.35m + 0.03m |
H= 12.9: D= 8.24: Albedo= 0.180:
Class= S PA=8
LPAB=233 : BPAB=-6.3 |
CALL target. No previous known period. |
| 5315 Nunes* |
 |
Date range: 23/06 - 26/06(1) Period: 2.798h +
0.003h
Amplitude: 0.24h + 0.03h |
H = 12.9 : D= 8.24 Albedo = 0.180: Class = S
PA = 18 : Lpab=247 Bpab= 4 |
CALL target. No previous known period |
| 5481 Kiuchi |
 |
P_Orb =20.895h + 0.003h P_1= 3.6199h +
0.0003h
Amplitude_1: 0.05 + 0.02mag
Amplitude_Orb: |
Number of sessions: Data Points:
Data range: 13/03/07 - 05/04/07 (2) |
Photometric Survey for Asynchronous Binary Asteroid target. Its a
confirmed binary. |
| 5905 Johnson* |
 |
Date range: 28/08 - 30/08 Period: 3.487h + 0.003h
Amplitude: 0.10m +
0.03m |
H= 13.2: Dia= 7.18: albedo= 0.180: Class=S PA = 31
Lpab= 281 : Bpab=16 |
PSABA target. Asynchronous Binary asteroid follow up work. Data
published in MPB Volume 36 issue 3 |
| 7516 Kranj* |
 |
Number sessions: 17 Date range: 12/04 - 13/05 (2)
Period: 3.9676h + 0.0002h
Amplitude: 0.18h +
0.03h |
H=13.20:Dia=7.18: Albedo=0.180:Class=S PA=19.4 - 8.1
LPAB=233.9 - 237.7 BPAB=8.5 - 10.5
Data Points: 991 |
Photometric Survey for Asynchronous Binary Asteroid target. A suspect
binary but no follow up confirmation even after numerous
observations from Leura observatory and other observatories. |
| 7965 Katsuhiko* |
 |
Date range: 28/06 - 08/07 (1) Period: 5.3899h +
0.0004h
Amplitude: 0.40m + 0.02m |
(+)H=12 : Dia = 21.02 : Albedo = 0.0634 : Class = S
PA=15.0 - 12.1
LPAB = 285 : BPAB = 19-16 |
Collaboration with Greg Crawford and targets suggested by Colin
Bembrick |
| 8567 1996 HW1 |
 |
Date range:01/10 - 09/10(1) Period: 8.7546h +
0.0003h
Amplitude: 1.0m + 0.1m |
H=15.30:Dia=2.73: Albedo=0.180:Class=S PA=24
LPAB=21.1-26.5: BPAB=-8.6-(-11.9) |
Work in collaboration with Vladimir Benishek from Serbia. |
| 13189 1997 AF13* |
 |
Date range: 21/06 - 26/06 (2) Period: 5.9371h + 0.0006h
Amplitude: 1.1m +
0.1m |
H = 14 : Dia = 4.96 : Albedo = 0.180 : Class = S PA = 11.7
LPAB = 243 : BPAB = 7 |
PSABA target. |
| 15268 1990 WF3 |
  |
Date range: 24/09 - 09/10(2) P1: 2.4225h + 0.0003h
Porb: 25.08h + 0.01h
|
H=14.2:Dia=4.53: Albedo=0.180 PA=4.7 - 6.0
LPAB=6.7 - 8.5
BPAB =-2.8 - (-3.2) |
Photometric Survey of Asynchronous Binary Asteroid. Confirmed binary
with orbital parameters as above. |
| 15515 1999 VN80 |
 |
Data range: 30/07 - 04/08 Period : 4.175h + 0.002h
Amplitude: 0.38m + 0.02m |
H =13.90 : Dia = 9.16: Albedo = 0.058 : Class =C PA = 17
LPAB = 57: BPAB=-3
|
Target in the same field while observing 929 Algunde. Data combined with
those obtained by Jozef Vilagi from Modra observatory. |
| 23046 1999 XN28 |
 |
Date range:24/08 - 28/08 Period: 2.792h + 0.003h
Amplitude: 0.40m + 0.05m |
H = 14.20: Dia=7.98: Albedo=0.058:Class=C PA= 13
Lpab=7: Bpab=-3 |
Target of opportunity, in the same field as 15268 1990 WF3. Relatively
faint at Instrumental magnitude of 18 with amplitude about 0.4m. Period
derived as 2.792h . Collaborate with S.Gajdos from Modra |
| 34155 2000 QJ22* |
 |
Date range: 25/10 - 08/12 Period: 3.0087h + 0.0002h
Amplitude: 0.10m + 0.03m |
H = 13.30:Dia = 6.85: Albedo = 0.180 : Class = S PA= 15 -
19
Lpab= 44 -50: Bpab= -16 |
PSABA. |
| 35107 1991 VH |
 |
Date range: 15/12 - 14/01 P_1: 2.6238h + 0.0001h
Porb: 32.82h + 0.03h
|
H = 16.90: Dia = 1.31: Albedo = 0.180 : Class = S
PA= 49.7 - 38.2 - 40
Lpab= 83 - 97
Bpab=-36 - (-13) |
PSABA. Binary asteroid follow up observation on subsequent apparitions.
Previous apparition were 1997 and 2003. Noted the low amplitude nature of
the lightcurve suggesting pole-on orientation. |
| 153591
2001 SN 263* |
 |
Date range: 13/03 - 31/03 (1) Period: 3.4251h + 0.0002h
Amplitude: 0.10m +
0.05m |
H = 16.32 : Dia = 1.71: Albedo = 0.180 : Class = S PA
=26.7 - 24.8
LPAB = 169 - 185.1
BPAB = -15.9 - (-16.3) |
Photometric Survey for Asynchronous Binary Asteroid target |
