Schedule Observations Schedule Spectroscopic Observations
NameP11bX5O → C/2021 A9
Type Comet (Hyperbolic)
Status Actively Following
Characterization Target
Source LOOK Project
Check Spectroscopic Feasibility Create LC Plot
Recent Blocks Scheduled
Measurements
Show Measurements
Plot Visibility
Last Update: 2025-Dec-24 20:22
Orbital Elements
MPC Comet
Epoch of elements (MJD)
61000.0 Nov. 21, 2025
Orbital inclination in deg 158.01782
Longitude of Ascending Node (deg) 314.85166
Arg of perihelion (deg) 211.66254
Eccentricity 0.9998229
Perihelion distance (AU) 7.7652616
Epoch of perihelion Dec. 4, 2023, 7:25 a.m.
Epoch of perihelion (MJD) 60282.30958
Total Magnitude (M1) 6.6
Slope Parameter (k1) 9.25
Physical Parameters
M1 from 397 observations, assumed slope, autocmod 3.0g

59
6.6 +/- 0.7
Reciprocal of semimajor axis E2025-X35
0.000078 au +/- 0.0000013
+/- 0.0000013
K1 autocmod 3.0g

59
9.25
Diameter Initial Diameter Guess using H=11.1 and albedo=0.14 (0.01 to 0.5)

MPC Default
21402.33 m +58678.0 / -10077.0
Follow-up Details
NEOCP digest2 score 35
Number of observations 483
Arc length (days) 1807.00
Time since last observation (days) 30.10
Spectroscopy Details
Known Taxonomies None