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C/2021 A9 (PANSTARRS)

Classification: Hyperbolic Comet SPK-ID: 1003760

[ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters ]

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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.

Orbital Elements at Epoch 2459241.5 (2021-Jan-27.0) TDB
Reference: JPL 4 (heliocentric ecliptic J2000)

Element	Value	Uncertainty (1-sigma)	Units
e	1.002678365307459	0.0033807
a	-2896.048809951662	3656	au
q	7.756676661282186	0.0028929	au
i	158.0230574182327	0.0091417	deg
node	314.8478352815558	0.011064	deg
peri	211.5219422434967	0.04139	deg
M	-.006573263737213396	0.01244	deg
t_p	2460280.907388374861 (2023-Dec-02.40738837)	1.1817	TDB
period	n/a n/a	n/a n/a	d yr
n	6.324049463888124E-6	1.1975e-05	deg/d
Q	n/a	n/a	au

Orbit Determination Parameters

# obs. used (total)	70
data-arc span	96 days
first obs. used	2020-12-12
last obs. used	2021-03-18
planetary ephem.	DE441
SB-pert. ephem.	SB441-N16
norm. resid. RMS	.29154
source	ORB
producer	Otto Matic
solution date	2021-Apr-15 23:34:17

Additional Information

Earth MOID = 6.79449 au

Jupiter MOID = 2.71744 au

[ show covariance matrix ]

[ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters ]

Physical Parameter Table

Parameter	Symbol	Value	Units	Sigma	Reference	Notes
comet total magnitude	M1	6.9		0.4	4	from 64 observations, assumed slope, autocmod 2.9c
comet total magnitude slope	K1	9.25		n/a	4	autocmod 2.9c

[ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters ]

2021-Apr-23 00:42 UT
(server date/time)

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