Asteroids

516155 2016DP help

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

Orbital Properties

Epoch

61000.0

MJD

Orbit type

Apollo

Perihelion (q)

0.535

Aphelion (Q)

1.511

Eccentricity (e)

0.477

Inclination (i)

13.3

deg

Orbit period (P)

377.7

Earth MOID

0.03200

U parameter

0.5

Next Earth close approach

Date

2025-11-24

Nominal distance (from Earth center)

0.032

4787020

Maximum Brightness

16.8

mag

Risk

Object is not in risk list

Physical Properties

Absolute Magnitude (H)

mag

Diameter

260 - 600*

Taxonomic type

Rotation period (T)

Discovery Information

Discovery Date

2016-02-18

Observatory

Mt. Lemmon Survey

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

1.022578

1-sigma variation

6.592E-9

Unit

Eccentricity (e)

Value

0.477280

1-sigma variation

1.115E-7

Unit

Inclination (i)

Value

13.3261

1-sigma variation

3.099E-6

Unit

Long. of Ascending Node (Ω)

Value

54.3551

1-sigma variation

1.408E-5

Unit

Arg. of Perihelion (ω)

Value

254.0067

1-sigma variation

1.292E-5

Unit

Mean Anomaly (M)

Value

54.25144

1-sigma variation

0.00002

Unit

Perihelion distance

Value

0.534522

1-sigma variation

Unit

Aphelion distance

Value

1.510633

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

-0.079785

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

-0.314576

1-sigma variation

Unit

MOID

Value

0.031999

1-sigma variation

Unit

Orbit Period

Value

377.6964

1-sigma variation

Unit

U parameter

Value

0.5

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	4.34544E-17	6.87621E-16	7.17190E-15	1.27631E-14	-6.80381E-15	-1.30623E-13
e	6.87621E-16	1.24432E-14	1.32594E-13	9.30377E-14	-6.31379E-14	-1.95189E-12
i	7.17190E-15	1.32594E-13	9.60623E-12	1.79153E-11	-1.48799E-11	-2.48746E-11
Ω	1.27631E-14	9.30377E-14	1.79153E-11	1.98132E-10	-1.71926E-10	-7.71058E-11
ω	-6.80381E-15	-6.31379E-14	-1.48799E-11	-1.71926E-10	1.66813E-10	2.78693E-11
M	-1.30623E-13	-1.95189E-12	-2.48746E-11	-7.71058E-11	2.78693E-11	4.50492E-10

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

20.042

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

260 - 600*

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

[-]

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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

3235

Unit

Source

[1]

Unobserved

Value

315

Unit

Source

[1]

Normalized RMS of residuals

Value

0.553673

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

2016-02-18.50112

Unit

Source

[2]

Last Observation

Value

2024-12-27.412361

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

477 (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 516155 2016DP 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	1954-04-11 02:24	< 1 min	0.1510943	0.1510912	0.0000011
VENUS	1956-05-28 18:12	< 1 min	0.0333627	0.0333428	0.0000066
EARTH	1963-11-22 23:06	< 1 min	0.0502723	0.0502630	0.0000031
EARTH	1964-11-29 21:03	< 1 min	0.1628598	0.1628490	0.0000036
VENUS	1968-12-24 08:20	< 1 min	0.0468358	0.0468315	0.0000014
EARTH	1985-04-03 02:16	< 1 min	0.1773168	0.1773163	0.0000002
VENUS	1985-04-26 19:14	< 1 min	0.0202054	0.0202045	0.0000003
EARTH	1986-04-15 02:23	< 1 min	0.1766703	0.1766699	0.0000001
EARTH	1994-11-20 01:07	< 1 min	0.1352645	0.1352609	0.0000012
EARTH	1995-11-27 04:56	< 1 min	0.0806072	0.0806036	0.0000012
EARTH	2016-04-09 03:24	< 1 min	0.1444705	0.1444703	0.0000001
EARTH	2025-11-24 00:55	< 1 min	0.0319993	0.0319991	0.0000001
VENUS	2033-12-01 06:50	< 1 min	0.0072513	0.0072483	0.0000010
EARTH	2045-04-04 20:18	< 1 min	0.1608032	0.1607994	0.0000012
EARTH	2053-11-19 17:38	< 1 min	0.1392857	0.1392723	0.0000045
EARTH	2054-11-27 18:11	< 1 min	0.0977717	0.0977585	0.0000044
VENUS	2070-03-20 17:19	< 1 min	0.0254896	0.0254756	0.0000046
EARTH	2073-04-06 22:35	< 1 s	0.1469102	0.1469098	0.0000001
EARTH	2081-11-21 23:49	< 1 min	0.0651983	0.0651723	0.0000087
EARTH	2082-12-01 04:32	< 1 min	0.1778982	0.1778666	0.0000105
VENUS	2086-10-28 16:01	1.3	0.0107182	0.0106754	0.0000143
EARTH	2100-04-11 18:39	10.2	0.1462495	0.1461568	0.0000311
EARTH	2107-11-20 22:12	3.9	0.1531672	0.1526402	0.0001757
EARTH	2108-11-28 06:51	10.3	0.0985295	0.0980106	0.0001730
VENUS	2123-05-27 11:07	8.6	0.0430968	0.0429560	0.0000474

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Stationary Points

Ecc. an. ast.	Ecc. an. Earth	Distance in au	Classification
84.38860016	319.98961516	0.03202618	MINIMUM
278.96685242	95.56353978	0.14415028	MINIMUM
1.24747537	208.72513575	0.50750571	SADDLE
182.08224987	26.68985077	0.59174006	SADDLE
359.61355265	25.80857325	1.51120809	SADDLE
178.86526490	204.74260057	2.50997198	MAXIMUM

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MOID Plots

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