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Minor planet follow-up portal
v. 3.14.2
2021 GR4
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Name
C5D7HR2 → 2021 GR4
Type
NEO
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-Apr-09 02:07
Orbital Elements
MPC Minor Planet
Epoch of elements (MJD)
59312.0
April 8, 2021
Orbital inclination in deg
19.1808
Longitude of Ascending Node (deg)
25.32772
Arg of perihelion (deg)
241.32192
Eccentricity
0.4091752
Mean distance (AU)
1.4238236
Mean Anomaly (deg)
330.38129
Absolute Magnitude (H)
25.2
Slope Parameter (G)
0.15
Albedo (average)
0.17
Albedo (range)
0.01 - 0.60
Diameter in meters (average)
32
Diameter in meters
(range)
16 - 121
Physical Parameters
Diameter
Initial Diameter Guess using H=25.2 and albedo=0.14 (0.01 to 0.5)
MPC Default
32.39 m
+89.0 / -15.0
Follow-up Details
NEOCP
digest2
score
76
Number of observations
20
Arc length (days)
1.69
Time since last observation (days)
0.08
Spectroscopy Details
Known Taxonomies
None
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