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Minor planet follow-up portal
v. 3.17.1
2026 HS4
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Schedule Spectroscopic Observations
Name
CEKPWC2 → 2026 HS4
Type
NEO
Status
Actively 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,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)
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Min Altitude
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Measurements
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Last Update: 2026-Apr-25 21:32
Orbital Elements
MPC Minor Planet
Epoch of elements (MJD)
61155.0
April 25, 2026
Orbital inclination in deg
26.44552
Longitude of Ascending Node (deg)
209.62823
Arg of perihelion (deg)
263.45001
Eccentricity
0.394613
Mean distance (AU)
1.169105
Mean Anomaly (deg)
53.61762
Absolute Magnitude (H)
25.1
Slope Parameter (G)
0.15
Albedo (average)
0.17
Albedo (range)
0.01 - 0.60
Diameter in meters (average)
34
Diameter in meters
(range)
16 - 127
Physical Parameters
Diameter
Initial Diameter Guess using H=25.1 and albedo=0.14 (0.01 to 0.5)
MPC Default
33.92 m
+93.0 / -16.0
Follow-up Details
NEOCP
digest2
score
79
Number of observations
26
Arc length (days)
1.71
Time since last observation (days)
0.34
Spectroscopy Details
Known Taxonomies
None
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