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v. 3.14.2
2021 JM4
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Name
P11g90N → 2021 JM4
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: 2021-May-11 16:55
Orbital Elements
MPC Minor Planet
Epoch of elements (MJD)
59344.0
May 10, 2021
Orbital inclination in deg
24.89419
Longitude of Ascending Node (deg)
126.52024
Arg of perihelion (deg)
263.36536
Eccentricity
0.2015717
Mean distance (AU)
1.9149321
Mean Anomaly (deg)
205.93136
Absolute Magnitude (H)
18.7
Slope Parameter (G)
0.15
Albedo (average)
0.17
Albedo (range)
0.01 - 0.60
Diameter in meters (average)
646
Diameter in meters
(range)
312 - 2418
Physical Parameters
Diameter
Initial Diameter Guess using H=18.7 and albedo=0.14 (0.01 to 0.5)
MPC Default
646.34 m
+1772.0 / -304.0
Follow-up Details
NEOCP
digest2
score
44
Number of observations
10
Arc length (days)
5.92
Time since last observation (days)
0.55
Spectroscopy Details
Known Taxonomies
None
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