Asteroids

2016HF2

Last update: 2022-10-07 16:03 UTC

Orbital Properties

Epoch

59800.0

MJD

Orbit type

Aten

Perihelion (q)

0.795

Aphelion (Q)

1.182

Eccentricity (e)

0.196

Inclination (i)

5.1

deg

Orbit period (P)

358.9

Earth MOID

0.00572

U parameter

5.6

Next Earth close approach

Date

2023-09-22

Nominal distance (from Earth center)

0.10639

15915750

Maximum Brightness

124.8

mag

Risk

Object is not in risk list

Object is not in priority list

Physical Properties

Absolute Magnitude (H)

26.2

mag

Diameter

21*

Taxonomic type

Rotation period (T)

Discovery Information

Discovery Date

2016-04-25

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

59800.0000

1-sigma variation

Unit

MJD

Semimajor Axis

Value

0.988414

1-sigma variation

0.000013

Unit

Eccentricity (e)

Value

0.195607

1-sigma variation

0.000120

Unit

Inclination (i)

Value

5.1020

1-sigma variation

0.0035

Unit

Ascending Node (Ω)

Value

33.9561

1-sigma variation

0.0007

Unit

Arg. of Perihelion (ω)

Value

70.1629

1-sigma variation

0.0028

Unit

Mean Anomaly (M)

Value

231.93799

1-sigma variation

0.08022

Unit

Perihelion

Value

0.795073

1-sigma variation

Unit

Aphelion

Value

1.181755

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

-0.101546

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

0.013070

1-sigma variation

Unit

MOID

Value

0.005717

1-sigma variation

Unit

Orbit Period

Value

358.9273

1-sigma variation

Unit

U parameter

Value

5.6

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	1.80227E-10	1.60496E-9	4.73230E-8	8.93411E-9	3.78603E-8	-1.07670E-6
e	1.60496E-9	1.43828E-8	4.23899E-7	7.99147E-8	3.35744E-7	-9.60225E-6
i	4.73230E-8	4.23899E-7	1.24940E-5	2.35564E-6	9.90232E-6	-2.83098E-4
Ω	8.93411E-9	7.99147E-8	2.35564E-6	4.44339E-7	1.87122E-6	-5.34286E-5
ω	3.78603E-8	3.35744E-7	9.90232E-6	1.87122E-6	7.97547E-6	-2.25965E-4
M	-1.07670E-6	-9.60225E-6	-2.83098E-4	-5.34286E-5	-2.25965E-4	6.43455E-3

Date of computation: 2022-09-20 15:08 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

26.176

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

21*

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

2348

Unit

Source

[1]

Astrometry Summary

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

Optical

Value

Unit

Source

RMS of Residuals

Value

0.440579

Unit

arcsec

Source

[1]

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

[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 2016HF2 from 1950 to 2122

Body	Date in UTC	Time uncert. in min	Nominal distance in au	Min. possibile distance in au	Distance uncert. in au
EARTH	1975-04-25 09:29	336.5	0.1021733	0.0546503	0.0121757
EARTH	1976-04-21 10:47	150.3	0.0114319	0.0054157	0.0116406
EARTH	1977-03-07 12:53	> 1 w	0.1573018	0.1324199	0.0076497
EARTH	1977-05-22 10:18	> 1 d	0.1378107	0.1145177	0.0071190
EARTH	1978-07-01 18:28	> 1 d	0.1831514	0.1797553	0.0011229
EARTH	1978-12-18 05:22	> 1 w	0.1987283	0.1936223	0.0016833
EARTH	1979-08-13 05:11	> 1 d	0.1624002	0.1510823	0.0036475
EARTH	1979-11-09 22:17	> 1 d	0.1510149	0.1365620	0.0045949
EARTH	1980-09-26 21:05	1075.7	0.0546236	0.0509819	0.0027349
EARTH	1981-09-17 05:15	481.2	0.1383840	0.1150838	0.0071248
EARTH	2015-04-27 08:41	10.1	0.1584443	0.1577273	0.0002388
EARTH	2016-04-21 14:27	< 1 min	0.0118785	0.0118542	0.0000081
EARTH	2017-04-28 18:29	98.9	0.0902814	0.0897643	0.0001723
EARTH	2018-02-19 06:27	570.9	0.1762950	0.1760347	0.0000873
EARTH	2018-06-03 14:09	422.8	0.1603578	0.1600856	0.0000912
EARTH	2019-07-01 08:40	653.4	0.1873680	0.1871388	0.0000764
EARTH	2019-12-26 09:30	960.0	0.1992303	0.1985683	0.0002203
EARTH	2020-07-28 01:19	939.9	0.1822842	0.1811830	0.0003661
EARTH	2020-11-29 02:33	1147.1	0.1748654	0.1733994	0.0004869
EARTH	2021-10-26 02:37	1046.6	0.1211799	0.1181420	0.0010009
EARTH	2022-09-29 05:22	203.8	0.0491012	0.0478405	0.0004152
EARTH	2023-09-22 02:06	144.1	0.1063902	0.1010074	0.0017511
EARTH	2070-04-25 15:35	962.9	0.1172059	0.0039164	0.0196659
EARTH	2071-04-22 06:48	624.6	0.0110596	0.0038664	0.0178539
EARTH	2072-04-21 05:43	> 1 d	0.0465063	0.0039435	0.0502033
EARTH	2073-05-04 21:06	> 1 mo	0.1089785	0.0039527	0.0898449
EARTH	2074-02-24 18:28	> 1 mo	0.1677074	0.0039939	0.0751829
EARTH	2074-05-29 06:49	> 1 mo	0.1547912	0.0039918	0.0773829
EARTH	2075-02-02 22:07	> 1 mo	0.1904412	0.0041454	0.0467249
EARTH	2075-06-17 16:38	> 1 mo	0.1810330	0.0039985	0.0514763
EARTH	2076-01-15 18:42	> 1 mo	0.1991627	0.1473948	0.0150380
EARTH	2076-07-04 09:52	> 1 mo	0.1925721	0.1497164	0.0127165
EARTH	2076-12-28 13:44	> 1 mo	0.1968532	0.0890900	0.0261330
EARTH	2077-07-22 09:18	> 1 mo	0.1905826	0.0045569	0.0449400
EARTH	2077-12-10 23:32	> 1 mo	0.1839719	0.0048518	0.0823185
EARTH	2078-08-12 13:46	> 1 mo	0.1730573	0.0039785	0.1478016
EARTH	2078-11-21 10:41	> 1 mo	0.1589250	0.0039662	0.1712182
EARTH	2079-10-27 22:54	> 1 mo	0.1186639	0.0439944	0.3171944
EARTH	2080-10-05 03:34	> 1 mo	0.0645434	0.0435231	0.3600251
EARTH	2081-09-28 15:53	> 1 mo	0.0473940	0.0439186	0.2181605
EARTH	2082-09-24 06:30	> 1 mo	0.1012616	0.0439747	0.6098503
EARTH	2083-09-20 09:26	> 1 mo	0.1729302	0.0438387	0.7273696

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