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Minor planet follow-up portal
v. 3.17.0
137126 (1999 CF9)
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Type
NEO (Apollo) [PHA]
Status
Actively Following
Characterization Target
Source
Goldstone
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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Measurements
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Last Update: 2025-Dec-31 19:28
Orbital Elements
MPC Minor Planet
Epoch of elements (MJD)
61036.0
Dec. 27, 2025
Orbital inclination in deg
5.54393
Longitude of Ascending Node (deg)
156.84508
Arg of perihelion (deg)
90.61267
Eccentricity
0.6008209
Mean distance (AU)
1.7700524
Mean Anomaly (deg)
103.20505
Absolute Magnitude (H)
18.15
Slope Parameter (G)
0.15
Albedo (average)
0.17
Albedo (range)
0.01 - 0.60
Diameter in meters (average)
833
Diameter in meters
(range)
402 - 3115
Physical Parameters
Diameter
Initial Diameter Guess using H=18.15 and albedo=0.14 (0.01 to 0.5)
MPC Default
832.65 m
+2283.0 / -392.0
Absolute Magnitude
MPO902571
18.06
Follow-up Details
Number of observations
965
Arc length (days)
7670.00
Time since last observation (days)
2.81
Spectroscopy Details
(Plots)
SMASS Spectra
NIR
Known Taxonomies
None
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