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Minor planet follow-up portal
v. 3.17.1a
31720 (1999 JW59)
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Type
Asteroid (Main-Belt)
Status
Actively Following
Characterization Target
Source
LCOGT
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)
ELP 0.4m - V98; (TEMP; McDonald, Texas)
ELP 0.4m - V99; (TEMP; 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: 2025-Dec-31 20:14
Orbital Elements
MPC Minor Planet
Epoch of elements (MJD)
61033.0
Dec. 24, 2025
Orbital inclination in deg
10.5202
Longitude of Ascending Node (deg)
217.69749
Arg of perihelion (deg)
69.85153
Eccentricity
0.1494061
Mean distance (AU)
3.0784098
Mean Anomaly (deg)
290.19741
Absolute Magnitude (H)
14.41
Slope Parameter (G)
0.15
Albedo (average)
0.17
Albedo (range)
0.01 - 0.60
Diameter in meters (average)
4661
Diameter in meters
(range)
2251 - 17439
Physical Parameters
Absolute Magnitude
E2025G08
14.18
Diameter
urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)
6.416 km
+/- 0.227
Albedo
urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)
0.118
+/- 0.025
Follow-up Details
Number of observations
865
Arc length (days)
7670.00
Time since last observation (days)
2522.09
Spectroscopy Details
Known Taxonomies
None
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