(294003) 2007 TN89 versus 2020 OJ94

This is a potentially interesting couple (future studies may confirm if these two asteroids separated from a common body or not).

Clones Generation

I generated 100 clones for each asteroid trying to achieve the same orbital parameters distribution as the real asteroids (data from JPL - Small-Body Database Lookup)

2007 TN89

	Clones			Target
	mean	sd		mean	sd
q	2.68037919449023	1.02422758252756e-07		2.68037919030732	1.0278e-07
e	0.0332834075416157	3.72583687170622e-08		0.0332834084098655	3.723e-08
i	4.87064454567147	4.91926754962451e-06		4.87064467562245	4.9051e-06
peri	119.704478491351	9.26537293487407e-05		119.70447923946	9.1341e-05
node	165.541938400386	5.00609236406486e-05		165.541939646563	4.9617e-05
tp	2460623.98663213	0.000350292088224234		2460623.98664169	0.00035377

2020 OJ94

	Clones			Target
	mean	sd		mean	sd
q	2.68031516329671	5.80931724850316e-07		2.68031508062098	5.8247e-07
e	0.0332987005798029	2.12854522457715e-07		0.0332987315205281	2.1173e-07
i	4.8708823913187	1.03347748674252e-05		4.87088223032125	1.0457e-05
peri	119.702555842119	0.000210522154416148		119.70257257331	0.00021113
node	165.541174514102	0.000118615308715787		165.541191321507	0.00011803
tp	2460627.54541522	0.000804795345716826		2460627.54557597	0.00080474

Simulation

The backward simulationwas done with Mercury 6 software taking into account all planets + Ceres + Pallas + Vesta:

)O+_06 Integration parameters  (WARNING: Do not delete this line!!)

) Lines beginning with `)' are ignored.

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

) Important integration parameters:

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

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

 start time (days)= 2460125.5

 stop time (days) = -1d8

 output interval (days) = 100

 timestep (days) = 0.05

 accuracy parameter=1.d-12

Results

After the simulation finished, I compared all the 100x100=10^4 clone couples to determine the behaviour of the "best" couples sorting them by minimum relative velocity.

The top 10 couples behaved like this (relative distance in km, relative velocity in m/s):

           Year relative_Distance relative_Velocity

 1:  -79283.756          3578.058             0.008

 2: -167296.514         10004.868             0.008

 3: -144257.301          7417.041             0.009

 4: -101207.820          4225.343             0.009

 5:  -95159.236          4890.873             0.015

 6: -133453.520          5479.847             0.017

 7: -143202.385          4896.550             0.017

 8: -111727.954          6362.393             0.020

 9: -101200.975          5827.283             0.020

10: -225280.730         11845.825             0.020

The best couple (row 1) is this one: