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Minor planet follow-up portal
v. 3.15.2
2009 HC21
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Type
NEO (Apollo)
Status
Not Following
Source
Yarkovsky
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)
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Last Update: 2024-Dec-09 19:42
Orbital Elements
MPC Minor Planet
Epoch of elements (MJD)
60400.0
March 31, 2024
Orbital inclination in deg
19.3542
Longitude of Ascending Node (deg)
213.29095
Arg of perihelion (deg)
126.90504
Eccentricity
0.1569589
Mean distance (AU)
1.1682581
Mean Anomaly (deg)
184.71518
Absolute Magnitude (H)
22.1
Slope Parameter (G)
0.15
Albedo (average)
0.17
Albedo (range)
0.01 - 0.60
Diameter in meters (average)
135
Diameter in meters
(range)
65 - 505
Physical Parameters
Diameter
Initial Diameter Guess using H=22.1 and albedo=0.14 (0.01 to 0.5)
MPC Default
135.04 m
+370.0 / -64.0
Absolute Magnitude
MPO740171
22.1
Follow-up Details
Number of observations
72
Arc length (days)
1799.00
Time since last observation (days)
3737.26
Spectroscopy Details
Known Taxonomies
None
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