Asteroids

2016XA2 help

Last update: 2025-09-10 00:30 UTC

Orbital Properties

Epoch

61000.0

MJD

Orbit type

Apollo

Perihelion (q)

0.510

Aphelion (Q)

3.592

Eccentricity (e)

0.751

Inclination (i)

7.0

deg

Orbit period (P)

1072.7

Earth MOID

0.00089

U parameter

7.6

Next Earth close approach

Date

2049-07-07

Nominal distance (from Earth center)

0.13473

20155902

Maximum Brightness

20.6

mag

Risk

Object is not in risk list

Physical Properties

Absolute Magnitude (H)

21.6

mag

Diameter

130 - 290*

Taxonomic type

Rotation period (T)

Discovery Information

Discovery Date

2016-12-04

Observatory

Space Surveillance Telescope, Atom Site

ORBIT VISUALISATION TOOLS

External links

Proper elements

Epoch

Near present day

Near middle of observation arc

Orbit properties

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

Value

1-sigma variation

Unit

Epoch

Value

61000.0000

1-sigma variation

Unit

MJD

Semimajor Axis

Value

2.050834

1-sigma variation

0.001361

Unit

Eccentricity (e)

Value

0.751267

1-sigma variation

0.000252

Unit

Inclination (i)

Value

7.0233

1-sigma variation

0.0031

Unit

Long. of Ascending Node (Ω)

Value

262.7034

1-sigma variation

0.0065

Unit

Arg. of Perihelion (ω)

Value

276.6748

1-sigma variation

0.0104

Unit

Mean Anomaly (M)

Value

356.92455

1-sigma variation

1.10231

Unit

Perihelion distance

Value

0.510109

1-sigma variation

Unit

Aphelion distance

Value

3.591558

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

-0.195380

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

-0.005967

1-sigma variation

Unit

MOID

Value

0.000889

1-sigma variation

Unit

Orbit Period

Value

1072.7391

1-sigma variation

Unit

U parameter

Value

7.6

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	1.85119E-6	3.43383E-7	4.19029E-6	-8.87482E-6	1.41847E-5	-1.49979E-3
e	3.43383E-7	6.36985E-8	7.77358E-7	-1.64632E-6	2.63192E-6	-2.78201E-4
i	4.19029E-6	7.77358E-7	9.48942E-6	-2.00938E-5	3.21310E-5	-3.39487E-3
Ω	-8.87482E-6	-1.64632E-6	-2.00938E-5	4.25539E-5	-6.80303E-5	7.19017E-3
ω	1.41847E-5	2.63192E-6	3.21310E-5	-6.80303E-5	1.08871E-4	-1.14921E-2
M	-1.49979E-3	-2.78201E-4	-3.39487E-3	7.19017E-3	-1.14921E-2	1.21509E0

Date of computation: 2025-09-10 00:30 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

21.582

Unit

mag

Source

[1]

Slope Parameter (G)

Value

0.15**

Unit

mag

Source

[1]

Albedo
Diameter

Size and albedo

Value

Unit

Source

Albedo

Value

0.05 - 0.25

Unit

Source

[2]

Diameter

Value

130 - 290*

Unit

Source

[2]

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 Aegis	ESA orbit determination and impact monitoring system
[2]	Estimation	Estimated from absolute magnitude

Observational Information

Arc Length
Unobserved
Normalized RMS of residuals

Arc Information

Value

Unit

Source

Arc Length

Value

Unit

Source

[1]

Unobserved

Value

3194

Unit

Source

[1]

Normalized RMS of residuals

Value

0.541182

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

2016-11-19.4368

Unit

Source

[2]

Last Observation

Value

2016-12-22.42888

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

92 (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

[-]

Last Observation

Value

Unit

Source

[-]

Delay (Discarded)

Value

0 (0)

Unit

Source

[-]

Doppler (Discarded)

Value

0 (0)

Unit

Source

[-]

Total Radar Observations (Discarded)

Value

0 (0)

Unit

Source

[-]

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

Sources

No.	Name	Additional
[1]	ESA Aegis	ESA orbit determination and impact monitoring system
[2]	MPC	Minor Planet Center: https://www.minorplanetcenter.net

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 2016XA2 from 1950 to 2125

Body	Date in UTC	Time uncert. in min	Nominal distance in au	Min. possible distance in au	Distance uncert. in au
EARTH	1954-12-19 08:08	> 1 d	0.0443688	0.0026211	0.0310428
EARTH	1957-12-08 19:37	> 1 d	0.1539361	0.0198315	0.0447758
EARTH	2002-07-07 13:13	> 1 d	0.1550513	0.0319283	0.0872081
EARTH	2005-06-17 16:49	> 1 d	0.1861285	0.0349541	0.0720869
EARTH	2016-12-22 13:45	< 1 min	0.1433186	0.1431606	0.0000527
EARTH	2049-07-07 06:31	> 1 w	0.1347339	0.0364328	0.1631410
EARTH	2063-12-06 18:53	> 1 d	0.1608622	0.0008070	0.1424907
EARTH	2093-07-09 18:50	> 1 d	0.1844304	0.0394482	0.1419977
EARTH	2096-06-17 20:29	> 1 w	0.1881374	0.0410486	0.1605243
15 Eunomia	2105-08-25 05:15	> 1 d	0.0101851	0.0061682	0.0936602
EARTH	2107-12-24 09:23	> 1 w	0.1282147	0.0047343	0.2152811

Download as:

Stationary Points

Ecc. an. ast.	Ecc. an. Earth	Distance in au	Classification
313.78906897	340.38011937	0.00094053	MINIMUM
47.56510441	175.90668189	0.03370009	MINIMUM
1.34893225	78.99902611	0.49412034	SADDLE
1.51187617	259.42088959	1.51064610	SADDLE
180.18893335	257.53104239	2.59791635	SADDLE
180.24266716	77.54965463	4.58155970	MAXIMUM

Download:

MOID Plots

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