• 2025-06-16 14:23 UTC
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Schedule Observations Schedule Spectroscopic Observations
NameX74756 → C/2021 S4
Type Comet
Status Actively Following
Characterization Target
Source LOOK Project
Check Spectroscopic Feasibility Create LC Plot
Recent Blocks Scheduled
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Measurements
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Last Update: 2025-Apr-28 07:03
Orbital Elements
MPC Comet
Epoch of elements (MJD)
60800.0 May 5, 2025
Orbital inclination in deg 17.47914
Longitude of Ascending Node (deg) 5.45598
Arg of perihelion (deg) 73.03233
Eccentricity 0.9573773
Perihelion distance (AU) 6.6914418
Epoch of perihelion Jan. 3, 2024, 6:51 p.m.
Epoch of perihelion (MJD) 60312.78546
Total Magnitude (M1) 6.4
Slope Parameter (k1) 9.25
Physical Parameters
Reciprocal of semimajor axis E2025-GB9
0.00668 au +/- 0.0000008
+/- 0.0000008
PC autocmod 3.0f

75
0.03
K2 autocmod 3.0f

75
5.0
M2 from 6 observations, autocmod 3.0f

75
10.1 +/- 0.4
K1 autocmod 3.0f

75
9.25
M1 from 1096 observations, assumed slope, autocmod 3.0f

75
6.4 +/- 0.7
Diameter Initial Diameter Guess using H=11.4 and albedo=0.14 (0.01 to 0.5)

MPC Default
18640.65 m +51106.0 / -8777.0
Follow-up Details
NEOCP digest2 score 35
Number of observations 1152
Arc length (days) 1299.00
Time since last observation (days) 13.29
Spectroscopy Details
Known Taxonomies None