Asteroids

2016HF2 help

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

Orbital Properties

Epoch

61000.0

MJD

Orbit type

Aten

Perihelion (q)

0.795

Aphelion (Q)

1.181

Eccentricity (e)

0.195

Inclination (i)

5.1

deg

Orbit period (P)

358.5

Earth MOID

0.00396

U parameter

6.2

Next Earth close approach

Date

2070-04-25

Nominal distance (from Earth center)

0.11724

17538535

Maximum Brightness

24.6

mag

Risk

Object is not in risk list

Physical Properties

Absolute Magnitude (H)

26.1

mag

Diameter

16 - 40*

Taxonomic type

Rotation period (T)

Discovery Information

Discovery Date

2016-04-25

Observatory

Catalina Sky 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

0.987688

1-sigma variation

0.000033

Unit

Eccentricity (e)

Value

0.195454

1-sigma variation

0.000119

Unit

Inclination (i)

Value

5.1320

1-sigma variation

0.0033

Unit

Long. of Ascending Node (Ω)

Value

33.6849

1-sigma variation

0.0016

Unit

Arg. of Perihelion (ω)

Value

70.4982

1-sigma variation

0.0050

Unit

Mean Anomaly (M)

Value

356.12733

1-sigma variation

0.14252

Unit

Perihelion distance

Value

0.794640

1-sigma variation

Unit

Aphelion distance

Value

1.180736

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

-0.102185

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

0.009007

1-sigma variation

Unit

MOID

Value

0.003963

1-sigma variation

Unit

Orbit Period

Value

358.5321

1-sigma variation

Unit

U parameter

Value

6.2

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	1.09366E-9	3.92759E-9	1.09259E-7	5.20451E-8	-1.66391E-7	-4.71311E-6
e	3.92759E-9	1.41575E-8	3.93748E-7	1.87332E-7	-5.99805E-7	-1.69253E-5
i	1.09259E-7	3.93748E-7	1.09513E-5	5.21063E-6	-1.66819E-5	-4.70836E-4
Ω	5.20451E-8	1.87332E-7	5.21063E-6	2.48026E-6	-7.93656E-6	-2.24283E-4
ω	-1.66391E-7	-5.99805E-7	-1.66819E-5	-7.93656E-6	2.54119E-5	7.17034E-4
M	-4.71311E-6	-1.69253E-5	-4.70836E-4	-2.24283E-4	7.17034E-4	2.03112E-2

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

26.076

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

16 - 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

Unit

Source

[1]

Unobserved

Value

3420

Unit

Source

[1]

Normalized RMS of residuals

Value

0.440412

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

2016-04-25.20712

Unit

Source

[2]

Last Observation

Value

2016-05-04.19044

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

77 (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 2016HF2 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	1975-04-25 09:29	336.3	0.1021931	0.0656907	0.0121720
EARTH	1976-04-21 10:46	149.9	0.0114508	0.0054507	0.0116492
EARTH	1977-03-07 12:38	> 1 w	0.1573142	0.1345844	0.0076495
EARTH	1977-05-22 10:26	> 1 d	0.1378223	0.1167463	0.0071195
EARTH	1978-07-01 18:33	> 1 d	0.1831532	0.1798625	0.0011226
EARTH	1978-12-18 05:16	> 1 w	0.1987256	0.1938770	0.0016839
EARTH	1979-08-13 05:18	> 1 d	0.1623943	0.1514700	0.0036487
EARTH	1979-11-09 22:10	> 1 d	0.1510074	0.1378670	0.0045959
EARTH	1980-09-26 21:02	1075.7	0.0546191	0.0512749	0.0027334
EARTH	1981-09-17 05:13	481.2	0.1383956	0.1173449	0.0071252
EARTH	2015-04-27 08:40	10.1	0.1584439	0.1577275	0.0002388
EARTH	2016-04-21 14:25	< 1 min	0.0118785	0.0118542	0.0000081
EARTH	2017-04-28 18:28	98.9	0.0902811	0.0897644	0.0001723
EARTH	2018-02-19 06:26	570.9	0.1762949	0.1760331	0.0000873
EARTH	2018-06-03 14:07	422.8	0.1603577	0.1600845	0.0000912
EARTH	2019-07-01 08:38	653.4	0.1873682	0.1871394	0.0000764
EARTH	2019-12-26 09:30	960.0	0.1992306	0.1985707	0.0002203
EARTH	2020-07-28 01:17	939.9	0.1822848	0.1811867	0.0003661
EARTH	2020-11-29 02:32	1147.1	0.1748661	0.1734105	0.0004869
EARTH	2021-10-26 02:37	1046.6	0.1211815	0.1181994	0.0010009
EARTH	2022-09-29 05:21	203.8	0.0491019	0.0480700	0.0004153
EARTH	2023-09-22 02:06	144.1	0.1063874	0.1011733	0.0017510
EARTH	2070-04-25 15:35	962.8	0.1172379	0.0582719	0.0196647
EARTH	2071-04-22 06:48	624.8	0.0110886	0.0038785	0.0178601
EARTH	2072-04-21 05:46	> 1 d	0.0465876	0.0044024	0.0499587
EARTH	2073-05-04 22:45	> 1 mo	0.1091240	0.0229839	0.0894062
EARTH	2074-02-24 16:07	> 1 mo	0.1678291	0.0464137	0.0747487
EARTH	2074-05-29 08:40	> 1 mo	0.1549164	0.0642891	0.0769665
EARTH	2075-02-02 19:55	> 1 mo	0.1905168	0.0523174	0.0464161
EARTH	2075-06-17 18:41	> 1 mo	0.1811163	0.1099379	0.0511102
EARTH	2076-01-15 16:16	> 1 mo	0.1991869	0.1827344	0.0147927
EARTH	2076-07-04 12:17	> 1 mo	0.1925925	0.1827531	0.0123837
EARTH	2076-12-28 10:53	> 1 mo	0.1968106	0.1845134	0.0263503
EARTH	2077-07-22 12:23	> 1 mo	0.1905094	0.1069563	0.0452859
EARTH	2077-12-10 20:05	> 1 mo	0.1838381	0.1494167	0.0825217
EARTH	2078-08-12 18:37	> 1 mo	0.1728169	0.0251264	0.1483669
EARTH	2078-11-21 06:02	> 1 mo	0.1586469	0.1136676	0.1714519
EARTH	2079-10-27 15:26	> 1 mo	0.1181486	0.0722192	0.3177209
EARTH	2080-10-05 00:27	> 1 mo	0.0639621	0.0454847	0.3561533
EARTH	2081-09-28 14:08	> 1 mo	0.0477552	0.0437210	0.2268198
EARTH	2082-09-24 04:52	> 1 mo	0.1022491	0.0446538	0.6067380
EARTH	2083-09-20 07:48	> 1 mo	0.1741046	0.0462159	0.7196708

Download as:

Stationary Points

Ecc. an. ast.	Ecc. an. Earth	Distance in au	Classification
95.72246673	107.87875222	0.00468503	MINIMUM
271.70770862	263.38559184	0.04752034	MINIMUM
184.10083577	185.30532783	0.18923044	SADDLE
3.73410784	6.29300287	0.20351162	SADDLE
0.67034129	182.61981762	1.80946859	SADDLE
179.78246268	1.69935811	2.16255055	MAXIMUM

Download:

MOID Plots

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