Asteroids

2016YH help

Last update: 2026-01-02 13:01 UTC

Orbital Properties

Epoch

61000.0

MJD

Orbit type

Aten

Perihelion (q)

0.358

Aphelion (Q)

1.005

Eccentricity (e)

0.474

Inclination (i)

2.2

deg

Orbit period (P)

205.5

Earth MOID

0.00754

U parameter

0.5

Next Earth close approach

Date

2034-12-16

Nominal distance (from Earth center)

0.01951

2918809

Maximum Brightness

17.6

mag

Risk

Object is not in risk list

Physical Properties

Absolute Magnitude (H)

25.8

mag

Diameter

18 - 40*

Taxonomic type

Rotation period (T)

Discovery Information

Discovery Date

2016-12-18

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

0.681454

1-sigma variation

2.906E-10

Unit

Eccentricity (e)

Value

0.474186

1-sigma variation

4.528E-8

Unit

Inclination (i)

Value

2.2199

1-sigma variation

1.061E-5

Unit

Long. of Ascending Node (Ω)

Value

266.0055

1-sigma variation

1.254E-5

Unit

Arg. of Perihelion (ω)

Value

0.4114

1-sigma variation

3.536E-5

Unit

Mean Anomaly (M)

Value

130.12245

1-sigma variation

0.00008

Unit

Perihelion distance

Value

0.358318

1-sigma variation

Unit

Aphelion distance

Value

1.004590

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

-0.659214

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

0.020444

1-sigma variation

Unit

MOID

Value

0.007537

1-sigma variation

Unit

Orbit Period

Value

205.4722

1-sigma variation

Unit

U parameter

Value

0.5

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	8.44448E-20	-4.10888E-18	-1.23087E-15	5.64125E-16	8.26479E-16	-3.68976E-15
e	-4.10888E-18	2.04994E-15	5.20810E-14	-5.95670E-14	1.19223E-12	-2.83010E-12
i	-1.23087E-15	5.20810E-14	1.12588E-10	-8.49834E-11	6.68331E-11	4.70039E-11
Ω	5.64125E-16	-5.95670E-14	-8.49834E-11	1.57329E-10	-1.98996E-10	1.04837E-10
ω	8.26479E-16	1.19223E-12	6.68331E-11	-1.98996E-10	1.25029E-9	-2.63759E-9
M	-3.68976E-15	-2.83010E-12	4.70039E-11	1.04837E-10	-2.63759E-9	6.35538E-9

Date of computation: 2026-01-02 13:01 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

25.792

Unit

mag

Source

[1]

Slope Parameter (G)

Value

0.15**

Unit

Source

[1]

Albedo
Diameter

Size and albedo

Value

Unit

Source

Albedo

Value

0.05 - 0.25

Unit

Source

[2]

Diameter

Value

18 - 40*

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

3289

Unit

Source

[1]

Unobserved

Value

Unit

Source

[1]

Normalized RMS of residuals

Value

0.746966

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

2016-12-18.25291

Unit

Source

[2]

Last Observation

Value

2025-12-19.812707

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

123 (2)

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

Note: Ephemerides requests are limited to a maximum of 1000 points and a final date not exceeding 2040/12/31 00:00.

Close Approaches for 2016YH from 1950 to 2126

Body	Date in UTC	Time uncert. in min	Nominal distance in au	Min. possible distance in au	Distance uncert. in au
EARTH	1953-12-15 03:56	< 1 s	0.0189641	0.0189641	0.0000000
EARTH	1962-12-16 05:11	< 1 min	0.0194382	0.0194381	0.0000000
EARTH	1971-12-18 05:32	< 1 min	0.0202688	0.0202687	0.0000000
EARTH	1980-12-21 09:46	< 1 min	0.0195686	0.0195686	0.0000000
EARTH	1989-12-22 20:42	< 1 min	0.0187659	0.0187659	0.0000000
EARTH	1998-12-23 00:48	< 1 min	0.0188011	0.0188010	0.0000000
EARTH	2007-12-19 13:00	< 1 min	0.0208522	0.0208521	0.0000000
EARTH	2016-12-15 17:46	< 1 s	0.0197269	0.0197268	0.0000000
MERCURY	2017-10-11 11:51	< 1 min	0.0433935	0.0433915	0.0000007
MERCURY	2019-06-19 23:30	< 1 min	0.0350451	0.0350439	0.0000004
MERCURY	2021-02-25 12:16	< 1 min	0.0320803	0.0320801	0.0000001
MERCURY	2022-11-04 02:08	< 1 min	0.0346074	0.0346065	0.0000003
MERCURY	2024-07-12 21:43	< 1 min	0.0421727	0.0421711	0.0000005
EARTH	2025-12-15 18:01	< 1 s	0.0195061	0.0195061	0.0000000
EARTH	2034-12-16 03:41	< 1 s	0.0195110	0.0195110	0.0000000
EARTH	2043-12-18 20:25	< 1 min	0.0205526	0.0205525	0.0000000
EARTH	2052-12-19 21:51	< 1 min	0.0201406	0.0201405	0.0000000
EARTH	2061-12-22 04:55	< 1 min	0.0190174	0.0190174	0.0000000
EARTH	2070-12-21 15:01	< 1 min	0.0196285	0.0196285	0.0000000
EARTH	2079-12-20 18:08	< 1 min	0.0202350	0.0202349	0.0000000
EARTH	2088-12-16 18:17	< 1 min	0.0204872	0.0204871	0.0000000
EARTH	2097-12-14 04:08	< 1 min	0.0184642	0.0184641	0.0000000
MERCURY	2103-04-13 07:10	< 1 min	0.0445642	0.0445622	0.0000007
MERCURY	2104-12-19 16:00	< 1 min	0.0367830	0.0367816	0.0000005
MERCURY	2106-08-28 01:07	< 1 min	0.0325734	0.0325729	0.0000002
EARTH	2106-12-16 12:25	< 1 s	0.0193850	0.0193850	0.0000000
MERCURY	2108-05-05 06:51	< 1 min	0.0321686	0.0321683	0.0000001
MERCURY	2110-01-11 18:48	< 1 min	0.0349455	0.0349445	0.0000003
MERCURY	2111-09-20 08:39	< 1 min	0.0407833	0.0407819	0.0000005
MERCURY	2113-05-29 01:15	< 1 min	0.0482681	0.0482663	0.0000006
EARTH	2115-12-18 10:34	< 1 min	0.0201543	0.0201543	0.0000000
EARTH	2124-12-20 15:35	< 1 min	0.0202291	0.0202290	0.0000000

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Stationary Points

Ecc. an. ast.	Ecc. an. Earth	Distance in au	Classification
160.89264259	334.07586119	0.00753747	MINIMUM
199.94152477	357.13974900	0.00830035	MINIMUM
180.53251486	345.67139307	0.02049744	SADDLE
1.22840275	166.51185676	0.65931388	SADDLE
1.18687423	346.46179021	1.34238241	SADDLE
180.46124214	165.63762613	2.02218696	MAXIMUM

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MOID Plots

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