2018 BE7 - an old comet?

Sam Deen has identified another  "imposter trojoan": 2018 BE7 

Andrew Walker has also analyzed its orbital characteristics.

I describe here the result of a backward simulation that shows that this object (as well as 2015 OL106) has 

the potential to be an old comet...not clear to me if this is just due to the high orbit uncertainty.

(2018 BE7)

Classification: Jupiter Trojan          SPK-ID: 3799005

[ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Close-Approach Data ]

Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB Reference: JPL 2 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .2517145998227567 0.00044326   a 5.27745894489277 0.0010489 au q 3.949045478498058 0.0015619 au i 31.00080732455304 0.005232 deg node 359.9407079502051 0.015479 deg peri 92.1666975695555 0.20747 deg M 84.22380191004567 0.089188 deg tp 2457964.480181911063 (2017-Jul-29.98018191) 1.3392 TDB period 4428.286613211319 12.12 1.3202 0.003615 d yr n .08129555095326904 2.4237e-05 deg/d Q 6.605872411287481 0.0013129 au

Orbit Determination Parameters    # obs. used (total)      24      data-arc span      38 days      first obs. used      2017-12-30      last obs. used      2018-02-06      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      5      norm. resid. RMS      .47737      source      ORB      producer      Otto Matic      solution date      2018-Mar-12 02:55:18   Additional Information  Earth MOID = 3.14677 au   Jupiter MOID = .0750553 au   T_jup = 2.657

Clones generation

	Clones			Target
	mean	sd		mean	sd
q	3.94904546224	0.00156467669		3.9490454785	0.0015619
e	0.25172016357	0.00044422146		0.25171459982	0.00044326
i	31.00103111513	0.00522676417		31.00080732455	0.005232
peri	92.15222161758	0.20728675619		92.16669756956	0.20747
node	359.94053458161	0.01544262868		359.9407079502	0.015479
tp	2457964.37314359	1.33721191964		2457964.48018191	1.3392

100 clones were generated as above

Simulation parameters

Simulator Mercury6 by J. E. Chambers.

)---------------------------------------------------------------------

) Important integration parameters:

)---------------------------------------------------------------------

 algorithm (MVS, BS, BS2, RADAU, HYBRID etc) = BS

 start time (days)= 2459167.50000

 stop time (days) = -1d8

 output interval (days) = 100

 timestep (days) = 0.05

 accuracy parameter=1.d-12

ejection distance (AU)= 100

Simulation Results

64 out of 100 clones entered the solar system from a distance greater than 100 AU