2015 OL106 - an old comet?

See Sam Deen's message thread in MPML about 2015 OL106  being an "imposter trojan". 

I performed a simulation with 100 clones trying to achieve the same nominal orbital parameters and uncertainty as below.

From Horizons web interface:

(2015 OL106) Classification: Jupiter Trojan          SPK-ID: 3928029 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Close-Approach Data ] [ show orbit diagram ] Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB Reference: JPL 2 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .2863714556023872 9.3239e-06   a 5.270192122670955 0.0001095 au q 3.760959533197438 2.9098e-05 au i 21.4224769951995 5.1601e-05 deg node 359.8294629245777 4.4923e-05 deg peri 313.6982197132379 0.0021834 deg M 145.9574151264247 0.0056942 deg tp 2457208.814574639116 (2015-Jul-05.31457464) 0.014075 TDB period 4419.143436948574 12.10 0.13773 0.0003771 d yr n .0814637508685576 2.5389e-06 deg/d Q 6.779424712144472 0.00014086 au   Orbit Determination Parameters    # obs. used (total)      39      data-arc span      850 days (2.33 yr)      first obs. used      2015-07-26      last obs. used      2017-11-22      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      4      norm. resid. RMS      .68872      source      ORB      producer      Otto Matic      solution date      2020-Mar-16 17:29:21   Additional Information  Earth MOID = 2.79199 au   Jupiter MOID = .530935 au   T_jup = 2.783

PL Small-Body Database Browser

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	Clones			Target
	mean	sd		mean	sd
q	3.76096161305	2.919293e-05		3.7609595332	2.9098e-05
e	0.28637206423	9.3409e-06		0.2863714556	9.3239e-06
i	21.42247962456	5.175126e-05		21.4224769952	5.1601e-05
peri	313.69838452814	0.00218824566		313.69821971324	0.0021834
node	359.82946145114	4.488101e-05		359.82946292458	4.4923e-05
tp	2457208.81561007	0.01411030776		2457208.81457464	0.014075

Simulation done with Mercury6 software with these parameters:

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

The simultion resuls are as follows:

78 clones arrived into the solar system from a distance greater than 100 AU

So it seems that this asteroid has the potential to be an old comet!

Cheers,

Alessandro Odasso