Asteroids

2017UJ2

Last update: 2023-06-03 23:50 UTC

Orbital Properties

Epoch

60000.0

MJD

Orbit type

Apollo

Perihelion (q)

0.916

Aphelion (Q)

1.328

Eccentricity (e)

0.184

Inclination (i)

0.5

deg

Orbit period (P)

434.0

Earth MOID

0.00017

U parameter

6.3

Next Earth close approach

Date

2023-06-07

Nominal distance (from Earth center)

0.01405

2101672

Maximum Brightness

124.4

mag

Risk

Object is in risk list

Object is in priority list

Physical Properties

Absolute Magnitude (H)

30.9

mag

Diameter

2.4*

Taxonomic type

Rotation period (T)

Discovery Information

Discovery Date

2017-10-21

Observatory

Catalina Sky Survey

Orbit Visualiser

Click the button to start Orbit Visualiser

External links

Proper elements

Epoch

Near present day

Near middle of observation arc

Orbit properties

Epoch
Semimajor Axis
Eccentricity (e)
Inclination (i)
Ascending Node (Ω)
Arg. of Perihelion (ω)
Mean Anomaly (M)
Perihelion
Aphelion
Asc. Node-Earth Sep.
Desc. Node-Earth Sep.
MOID
Orbit Period
U parameter

Value

1-sigma variation

Unit

Epoch

Value

60000.0000

1-sigma variation

Unit

MJD

Semimajor Axis

Value

1.121830

1-sigma variation

0.000052

Unit

Eccentricity (e)

Value

0.183635

1-sigma variation

0.000064

Unit

Inclination (i)

Value

0.5245

1-sigma variation

0.0001

Unit

Ascending Node (Ω)

Value

28.3622

1-sigma variation

0.0003

Unit

Arg. of Perihelion (ω)

Value

297.4534

1-sigma variation

0.0020

Unit

Mean Anomaly (M)

Value

224.64448

1-sigma variation

0.11515

Unit

Perihelion

Value

0.915823

1-sigma variation

Unit

Aphelion

Value

1.327837

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

0.003021

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

0.180233

1-sigma variation

Unit

MOID

Value

0.000167

1-sigma variation

Unit

Orbit Period

Value

433.9992

1-sigma variation

Unit

U parameter

Value

6.3

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	2.67386E-9	3.28381E-9	2.43318E-9	-1.62746E-8	-9.63075E-8	-5.95417E-6
e	3.28381E-9	4.04000E-9	2.79204E-9	-2.00142E-8	-1.19866E-7	-7.31172E-6
i	2.43318E-9	2.79204E-9	8.95033E-9	-1.38275E-8	-4.62193E-8	-5.43503E-6
Ω	-1.62746E-8	-2.00142E-8	-1.38275E-8	9.95781E-8	5.91490E-7	3.62381E-5
ω	-9.63075E-8	-1.19866E-7	-4.62193E-8	5.91490E-7	3.83131E-6	2.14302E-4
M	-5.95417E-6	-7.31172E-6	-5.43503E-6	3.62381E-5	2.14302E-4	1.32588E-2

Date of computation: 2023-05-08 23:51 UTC

Note: The ASCII file is in a format suitable for Orbfit input.

Download ASCII file:

Physical properties

Rotation Period
Quality
Amplitude
Rotation Direction
Spinvector L
Spinvector B

Rotational properties

Value

Unit

Source

Rotation Period

Value

Unit

Source

[-]

Quality

Value

Unit

Source

[-]

Amplitude

Value

Unit

mag

Source

[-]

Rotation Direction

Value

Unit

Source

[-]

Spinvector L

Value

Unit

Source

[-]

Spinvector B

Value

Unit

Source

[-]

Taxonomy
Taxonomy (all)

Taxonomy

Value

Unit

Source

Taxonomy

Value

Unit

Source

[-]

Taxonomy (all)

Value

Unit

Source

[-]

Absolute Magnitude (H)
Slope Parameter (G)

H / G

Value

Unit

Source

Absolute Magnitude (H)

Value

30.881

Unit

mag

Source

[1]

Slope Parameter (G)

Value

0.15**

Unit

mag

Source

[1]

[2]

Albedo
Diameter

Size and albedo

Value

Unit

Source

Albedo

Value

Unit

Source

[-]

Diameter

Value

2.4*

Unit

Source

[3]

Color Index Information

Color Index Information

Value

Unit

Source

Color Index Information

Value

Unit

mag

Source

[-]

Sightings

Sightings

Value

Unit

Source

Sightings

Value

Unit

Source

[-]

Download this part as:

Sources

No.	Name	Additional
[1]	ESA ODIM	ESA orbit determination and impact monitoring system
[2]	NEODyS	NEO Dynamic Site: https://newton.spacedys.com/neodys2
[3]	Estimation	Estimated from absolute magnitude

Observational Information

Arc Length
Unobserved

Arc Information

Value

Unit

Source

Arc Length

Value

Unit

Source

[1]

Unobserved

Value

2051

Unit

Source

[1]

Astrometry Summary

RMS of Residuals
First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

RMS of Residuals

Value

0.488792

Unit

arcsec

Source

[1]

First Observation

Value

2017-10-21.35974

Unit

Source

[2]

Last Observation

Value

2017-10-22.43424

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

27 (0)

Unit

Source

[1]

Radar Summary

First Observation
Last Observation
Delay (Discarded)
Doppler (Discarded)
Total Optical Observations (Discarded)

Radar

Value

Unit

Source

First Observation

Value

Unit

Source

[3]

Last Observation

Value

Unit

Source

[3]

Delay (Discarded)

Value

0 (0)

Unit

Source

[1]

Doppler (Discarded)

Value

0 (0)

Unit

Source

[1]

Total Radar Observations (Discarded)

Value

0 (0)

Unit

Source

[1]

Note: The ASCII file is in a format suitable for Orbfit input.

Sources

No.	Name	Additional
[1]	ESA ODIM	ESA orbit determination and impact monitoring system
[2]	MPC	Minor Planet Center: https://www.minorplanetcenter.net
[3]	JPL Radar Observations	Jet Propulsion Laboratory: https://ssd.jpl.nasa.gov/dat/radar_data_ast.txt

Computation parameters

As seen from:

Initial Date: *

Final Date: *

Output option:

One line per time step

Time step:*

* - these fields are required

Close approaches for 2017UJ2 from 1950 to 2123

Body	Date in UTC	Time uncert. in min	Nominal distance in au	Min. possibile distance in au	Distance uncert. in au
EARTH	1962-03-20 06:18	> 1 mo	0.1720285	0.1243995	0.8496215
EARTH	1962-10-10 21:04	> 1 mo	0.0881664	0.0097562	1.7560906
EARTH	1977-05-03 21:09	> 1 d	0.1280973	0.0414878	0.1345896
EARTH	1978-10-20 09:47	1343.5	0.0086004	0.0010371	0.0139931
EARTH	1996-04-29 02:55	304.0	0.1016756	0.0671780	0.0120839
EARTH	1997-03-04 15:53	> 1 w	0.1846976	0.1694644	0.0054098
EARTH	1997-10-12 08:04	> 1 d	0.0864171	0.0433701	0.0144158
EARTH	2016-04-28 04:32	55.2	0.0366475	0.0365917	0.0000268
EARTH	2017-10-20 14:06	< 1 min	0.0001196	0.0001194	0.0000001
EARTH	2023-06-07 06:55	413.8	0.0140488	0.0082789	0.0022438
EARTH	2030-10-29 22:02	> 1 d	0.0783554	0.0018682	0.0344588
EARTH	2036-05-27 14:45	> 1 d	0.1595902	0.0514367	0.0361201
EARTH	2043-10-17 20:50	> 1 w	0.0310115	0.0008530	0.0299195
EARTH	2056-06-06 12:51	> 1 w	0.0092721	0.0069168	0.1462309
EARTH	2063-06-05 02:27	> 1 mo	0.0281801	0.0070141	0.9241410
EARTH	2078-11-08 15:52	> 1 mo	0.1788716	0.0052566	9.7224670
EARTH	2085-10-25 07:48	> 1 mo	0.0162713	0.0034656	11.8263522
EARTH	2092-05-31 09:25	> 1 mo	0.0538606	0.0067555	162.1477190
EARTH	2100-10-25 01:32	> 1 mo	0.0256552	0.0044452	20.0578121
EARTH	2115-06-02 17:21	> 1 mo	0.0305979	0.0064137	460.1274343
EARTH	2123-06-14 07:35	> 1 mo	0.0465487	0.0064352	1955.0813460

Download as:

2017UJ2

Date in UTC	MJD	σ	σ_imp	Distance ± Width in RE	Stretching in RE/σ	IP	Exp. energy	PS
2061-05-18.446	73962.446	-1.590	0.000	2.23 ± 0.030	2.54E7	6.69E-9	1.90E-12	-11.08
2075-10-26.321	79236.321	-1.607	0.000	0.86 ± 0.054	2.49E7	1.93E-8	5.49E-12	-10.76
2087-10-23.583	83616.583	-1.656	0.000	1.82 ± 0.022	1.62E7	1.98E-8	5.61E-12	-10.84
2089-10-22.835	84346.835	-1.651	0.000	1.34 ± 0.025	2.07E7	1.91E-8	5.43E-12	-10.87
2090-06-02.520	84569.520	4.017	0.000	0.82 ± 0.074	8.26E6	6.70E-11	1.90E-14	-13.32
2092-06-18.200	85316.200	2.209	0.000	0.93 ± 0.522	1.05E7	1.46E-8	4.16E-12	-10.99
2097-06-21.720	87145.720	-0.592	0.000	0.70 ± 0.109	1.92E7	7.84E-8	2.23E-11	-10.30
2102-06-23.495	88972.495	0.183	0.000	1.10 ± 0.089	3.86E7	4.70E-8	1.33E-11	-10.55
2112-06-22.662	92624.662	-0.025	0.000	1.04 ± 0.411	4.49E6	3.68E-7	1.04E-10	-9.70
2117-05-24.888	94421.888	1.305	1.182	2.36 ± 6.490	8.41E7	3.97E-10	1.11E-13	-12.70
2118-05-27.723	94789.723	1.485	0.000	1.01 ± 1.052	8.64E6	5.48E-8	1.56E-11	-10.56
2119-05-26.455	95153.455	0.250	0.000	0.04 ± 0.000	4.10E8	4.44E-9	1.26E-12	-11.65
2120-06-04.553	95528.553	0.909	0.000	0.88 ± 0.376	1.89E7	6.44E-8	1.83E-11	-10.50
2121-10-25.618	96036.618	-1.607	0.000	1.95 ± 0.045	5.21E8	5.82E-10	1.65E-13	-12.55


Based on 27 optical observations (of which 0 are rejected as outliers) from 2017/10/21.360 to 2017/10/22.434.
Coordinates are given on the Target Plane.
Unit is one Earth radius, but impact cross section has radius between 2.36 and 2.36 Earth radii.
Coordinates for LOV = EQU scaled= 1 second= F.
Aegis software version= 4.0, Date of computation=20220725 001935.808 UTC.

Download this part as:

Download Impactor Table as: