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Minor planet follow-up portal
v. 3.17.1
439437 (2013 NK4)
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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,V45,V47; (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: 2026-Apr-30 07:02
Orbital Elements
MPC Minor Planet
Epoch of elements (MJD)
61161.0
May 1, 2026
Orbital inclination in deg
6.54753
Longitude of Ascending Node (deg)
33.69266
Arg of perihelion (deg)
50.59985
Eccentricity
0.549923
Mean distance (AU)
1.0226421
Mean Anomaly (deg)
47.62687
Absolute Magnitude (H)
18.98
Slope Parameter (G)
0.15
Albedo (average)
0.17
Albedo (range)
0.01 - 0.60
Diameter in meters (average)
568
Diameter in meters
(range)
274 - 2126
Physical Parameters
Absolute Magnitude
E2025L19
18.93
Diameter
Initial Diameter Guess using H=18.98 and albedo=0.14 (0.01 to 0.5)
MPC Default
568.15 m
+1558.0 / -268.0
Follow-up Details
Number of observations
627
Arc length (days)
4748.00
Time since last observation (days)
336.29
Spectroscopy Details
Known Taxonomies
None
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