2009 - Minor Planet Photometry

Go to content

2009

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

Celestron CGE

7 (GEG)

robofocus

ST9 XME

E17

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‚Äôs 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.

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.

PSABA: Photometric Survey of Asynchronous Binary Asteroids. CALL: Collaborative Asteroid Light curve Link


31 Euphrosyne*

Date range: 05/06 - 22/06 (1)
Period: 5.529h + 0.001h
Amplitude:0.10m + 0.01m
H=6.74: G=0.15: Dia=247.63: Albedo=0.058: Class = C:PA=8
LPAB=266: BPAB=-25

Work in collaboration with Frederick Pilcher for spin/shape model contribution.

1729 Beryl*

Date range:03/05 - 23/06(1)
Period: 4.8888h + 0.0003h
Amplitude: 0.18m + 0.02m
H=12.5: G=0.15: Dia=9.91: Albedo=0.18: Class =S:PA=11,2,18
LPAB=242: BPAB=-3

Selected from CALL website

2001 FE 90

Date Range: 01/07 - 03/07(1)
Period: 0.47713h + 0.00009h
Amplitude: 0.80m + 0.03m
H=20.7: G=0.15: Dia=0.23: Albedo=0.18: Class =S:PA=10,13
LPAB=274,282: BPAB=-1,-7

Initially prompted by Yurij Krugly from Kharkiv university. Later found to be a target (NEA) that the rest of the photometrist population has been following towards the end of June

2705 Wu*

Date Range: 28/07 - 11/09
Period: 150.51h + 0.08h
Amplitude: 1.2m + 0.1m
H=13.60: G=0.15: Dia=5.97: Albedo=0.18: Class =S:PA=13,4
LPAB=323: BPAB=-5

Asteroid selected from CALL website with no previous period determination done. Data were linked internally using Comp Star Selector feature in Canopus 9.5.0.10. Such a long period asteroid has high probability for showing a "tumbling"properties. (Harris 1994). The available data has shown that this target exhibited a Non principal axis rotation as defined in Pravec at al(2005)

3868 Mendoza

Date Range: 25/04 - 17/05(2)
Period: 2.7709h + 0.0003h
Amplitude: 0.05m + 0.05m
H = 13.00: G = 0.15: Dia = 7.87: Albedo =0.18: Class = S:PA = 5, 9
LPAB = 220: BPAB = 8

PSABA selectin. Binary discovery and  announcement

2965 Surikov*

Date range:09/08 - 18/08(1,2)
Period:9.061h + 0.003h
Amplitude:0.28m + 0.03m
H=13.60: G = 0.15: Dia=5.97 : Albedo =0.18: Class =S:PA = 9, 13
LPAB = 298 : BPAB = 2

PSABA selection

3076 Garber

Date range:  18/11 - 29/11(2)
Period: 2.6087h  + 0.0005h
amplitude: 0.15m + 0.03m H= 13.7 : G = 0.15 : Dia = 5.7 : Albedo = 0.18: Class =S:
PA = 5,10
LPAB= 54 : BPAB =-7

PSABA selection

3034 Climenhaga

Date range:10/06 - 20/08(1)
P_1 :2.73757h + 0.00003h
P_2: 18.9540h + 0.0005h
Amplitude: 0.13m + 0.02m
H= 12.30 : G = 0.15 : Dia = 10.86 : Albedo = 0.18: Class =S::PA = 29, 4,  6
LPAB= 309, 323 : BPAB = -6

PSABA selection. Secondary rotation period detected indicating the presence of a satellite where this secondary period is the rotation period of that satellite. Usually the satellite rotation period is synchronous with its orbital period. However currently no mutual events have been detected to confirm its existence.

4904 Makio*

Date Range: 05/03 - 21/03(1)
Period: 7.830h + 0.003h
Amplitude : 0.10m + 0.02m
H = 12.60 : G =0.15 : Dia= 9.46: Albedo = 0.18: Class = S:PA=9
LPAB = 162 : BPAB = -13
CALL Selection

19483 1998 HA 116*

Date range: 30/01 - 05/02(2)
Period: 2.721h + 0.001h
Amplitude: 0.08m + 0.05m
H=13.7 : Dia=5.7 : Albedo 0.180 : Class =S:PA = 6
LPAB = 133: BPAB = -10

11116 1996 EK*

Date Range: 15/03 - 24/03(2)
Period: 4.401h + 0.002h
Amplitude: 0.06m + 0.02m
H =  14.2: G = 0.15: Dia = 4.53: Albedo= 0.18: Class = S:PA= 6, 11
LPAB= 168: BPAB= 4

In the same field of view as another target.

55760 1992 BL1*

Date Range: 21/11 - 16/12(1)
Period: 8.0813h + 0.0004h
Amplitude: 0.32m + 0.03m
H =  12.9: G = 0.15: Dia =8.24: Albedo= 0.18: Class = S":PA= 32
LPAB= 45,54 BPAB= -36

CALL target

2543 Machado

Date range: 31/08/2008 - 27/09/2008(1)
Period: 31.72 + 0.03h
Amplitude: 0.15m + 0.05m
H=11:Dia=34.82: Albedo=0.058: Class=C:PA=17.0
LPAB=8.1:BPAB=-13.2

Light curve data from 2008 is reprocessed with Canopus V9.5.0.10 and using Comp Star Selector feature to determine its nightly zero point. This was selected due to its low amplitude determined from last year reduction result. The 0.15m amplitude is relatively low for this longish period target resulting in this unambiguous result. The next opposition on 1st Jan 2010 and the following few apparitions will be a northern hemisphere target.

Back to content | Back to main menu