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v. 3.14.2
2021 SY4
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Name
P21lca6 → 2021 SY4
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-Oct-05 13:31
Orbital Elements
MPC Minor Planet
Epoch of elements (MJD)
59474.0
Sept. 17, 2021
Orbital inclination in deg
21.71468
Longitude of Ascending Node (deg)
222.68483
Arg of perihelion (deg)
91.70535
Eccentricity
0.3032755
Mean distance (AU)
1.9494372
Mean Anomaly (deg)
28.28252
Absolute Magnitude (H)
20.2
Slope Parameter (G)
0.15
Albedo (average)
0.17
Albedo (range)
0.01 - 0.60
Diameter in meters (average)
324
Diameter in meters
(range)
156 - 1212
Physical Parameters
Diameter
Initial Diameter Guess using H=20.2 and albedo=0.14 (0.01 to 0.5)
MPC Default
323.94 m
+888.0 / -153.0
Follow-up Details
NEOCP
digest2
score
78
Number of observations
9
Arc length (days)
17.16
Time since last observation (days)
1.43
Spectroscopy Details
Known Taxonomies
None
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