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v. 3.15.3
2011 YL9
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Name
WEBFE7D → 2011 YL9
Type
Asteroid
Status
Not Following
Source
Minor Planet Center
UTC date
------------ Any 1.0m ------------
LSC 1.0m - W85-87; (CTIO, Chile)
ELP 1.0m - V37,V39; (McDonald, Texas)
COJ 1.0m - Q63-64; (Siding Spring, Aust.)
CPT 1.0m - K91-93; (Sutherland, S. Africa)
TFN 1.0m - Z31,Z24; (Tenerife, Spain)
------------ Any 0.4m ------------
LSC 0.4m - W89,W79; (CTIO, Chile)
ELP 0.4m - V38; (McDonald, Texas)
OGG 0.4m - T03-04; (Maui, Hawaii)
COJ 0.4m - Q58-59; (Siding Spring, Aust.)
CPT 0.4m - L09; (Sutherland, S. Africa)
TFN 0.4m - Z17,Z21; (Tenerife, Spain)
------------ Any 2.0m ------------
FTS 2.0m - E10; (Siding Spring, Aust.) [MuSCAT4]
FTN 2.0m - F65; (Maui, Hawaii ) [MuSCAT3]
------------ Non LCO ------------
Mt John 1.8m - 474 (Mt John, NZ)
Site
Min Altitude
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Measurements
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Last Update: 2020-Jan-31 00:00
Orbital Elements
MPC Minor Planet
Epoch of elements (MJD)
59600.0
Jan. 21, 2022
Orbital inclination in deg
23.46169
Longitude of Ascending Node (deg)
81.22852
Arg of perihelion (deg)
350.89725
Eccentricity
0.0976528
Mean distance (AU)
1.9078334
Mean Anomaly (deg)
306.1015
Absolute Magnitude (H)
18.69
Slope Parameter (G)
0.15
Albedo (average)
0.17
Albedo (range)
0.01 - 0.60
Diameter in meters (average)
649
Diameter in meters
(range)
314 - 2430
Physical Parameters
Phase Slope
MPC Default
0.15
Diameter
Initial Diameter Guess using H=18.69 and albedo=0.14 (0.01 to 0.5)
MPC Default
649.32 m
+1780.0 / -306.0
Absolute Magnitude
MPC Default
18.69
Follow-up Details
Number of observations
110
Arc length (days)
2984.00
Time since last observation (days)
957.93
Spectroscopy Details
Known Taxonomies
None
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