Asteroids

215588 2003HF2 help

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

Orbital Properties

Epoch

61000.0

MJD

Orbit type

Apollo

Perihelion (q)

0.361

Aphelion (Q)

1.866

Eccentricity (e)

0.675

Inclination (i)

3.1

deg

Orbit period (P)

429.4

Earth MOID

0.00304

U parameter

0.0

Next Earth close approach

Date

2027-07-17

Nominal distance (from Earth center)

0.05387

8058946

Maximum Brightness

16.5

mag

Risk

Object is not in risk list

Physical Properties

Absolute Magnitude (H)

19.4

mag

Diameter

490

Taxonomic type

Rotation period (T)

Discovery Information

Discovery Date

2003-04-24

Observatory

Lowell Observatory-LONEOS

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

1.113910

1-sigma variation

1.722E-9

Unit

Eccentricity (e)

Value

0.675487

1-sigma variation

1.381E-8

Unit

Inclination (i)

Value

3.0541

1-sigma variation

3.149E-6

Unit

Long. of Ascending Node (Ω)

Value

189.8509

1-sigma variation

0.0001

Unit

Arg. of Perihelion (ω)

Value

231.0729

1-sigma variation

0.0001

Unit

Mean Anomaly (M)

Value

170.66238

1-sigma variation

0.00001

Unit

Perihelion distance

Value

0.361479

1-sigma variation

Unit

Aphelion distance

Value

1.866341

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

0.052456

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

-0.575851

1-sigma variation

Unit

MOID

Value

0.003040

1-sigma variation

Unit

Orbit Period

Value

429.4114

1-sigma variation

Unit

U parameter

Value

0.0

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	2.96594E-18	8.32738E-18	-1.91391E-15	-2.23673E-14	2.18001E-14	-1.15143E-14
e	8.32738E-18	1.90739E-16	-1.38692E-15	8.98563E-14	-1.07534E-13	-4.10611E-14
i	-1.91391E-15	-1.38692E-15	9.91330E-12	6.50970E-11	-6.52359E-11	7.48519E-12
Ω	-2.23673E-14	8.98563E-14	6.50970E-11	3.69954E-9	-3.71586E-9	7.59723E-11
ω	2.18001E-14	-1.07534E-13	-6.52359E-11	-3.71586E-9	3.73386E-9	-7.29292E-11
M	-1.15143E-14	-4.10611E-14	7.48519E-12	7.59723E-11	-7.29292E-11	4.51719E-11

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

0.1

Unit

mag

Source

[2]

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

19.411

Unit

mag

Source

[1]

Slope Parameter (G)

Value

0.15**

Unit

mag

Source

[1]

Albedo
Diameter

Size and albedo

Value

Unit

Source

Albedo

Value

0.12

Unit

Source

[2]

Diameter

Value

490

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

Radar R

Unit

Source

[3]

Download this part as:

Sources

No.	Name	Additional
[1]	ESA Aegis	ESA orbit determination and impact monitoring system
[2]	EARN	1.) Nugent, C.R. et al. (2015) Astrophys. J. 814_117 (13pp) (NEOWISE Reactivation Mission Year One: Preliminary Asteroid Diameters and Albedos)(201 NEOs)
[3]	EARN	1.) href="http://echo.jpl.nasa.gov/asteroids/index.html">JPL's NEO Radar Detection Program Webpage

Observational Information

Arc Length
Unobserved
Normalized RMS of residuals

Arc Information

Value

Unit

Source

Arc Length

Value

8029

Unit

Source

[1]

Unobserved

Value

501

Unit

Source

[1]

Normalized RMS of residuals

Value

0.62847

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

2002-05-10.31106

Unit

Source

[2]

Last Observation

Value

2024-05-03.58377

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

433 (7)

Unit

Source

[1]

Radar Summary

First Observation
Last Observation
Delay (Discarded)
Doppler (Discarded)
Total Optical Observations (Discarded)

Radar

Value

Unit

Source

First Observation

Value

2017-03-26

Unit

Source

[3]

Last Observation

Value

2017-04-01

Unit

Source

[3]

Delay (Discarded)

Value

11 (0)

Unit

Source

[1]

Doppler (Discarded)

Value

0 (0)

Unit

Source

[-]

Total Radar Observations (Discarded)

Value

11 (0)

Unit

Source

[1]

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
[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 215588 2003HF2 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	1953-07-15 03:27	< 1 min	0.0597249	0.0597090	0.0000053
EARTH	1960-07-21 09:08	< 1 min	0.1909452	0.1909281	0.0000057
MARS	1969-03-26 20:11	< 1 s	0.0453253	0.0453249	0.0000001
EARTH	1970-03-27 11:45	< 1 min	0.0103321	0.0103303	0.0000006
MARS	1978-08-21 16:29	< 1 s	0.0377832	0.0377824	0.0000003
EARTH	1980-07-14 15:38	< 1 min	0.0698897	0.0698887	0.0000003
MARS	1988-01-16 12:29	< 1 s	0.0335142	0.0335135	0.0000002
EARTH	1990-03-24 03:53	< 1 min	0.0975934	0.0975920	0.0000005
EARTH	1997-04-04 02:49	< 1 min	0.1991086	0.1991077	0.0000003
MARS	1997-06-12 08:26	< 1 s	0.0272930	0.0272928	0.0000001
EARTH	2000-07-09 02:15	< 1 s	0.1892403	0.1892397	0.0000002
MARS	2006-11-07 05:28	< 1 s	0.0296129	0.0296127	0.0000001
EARTH	2007-07-20 21:12	< 1 s	0.1178684	0.1178680	0.0000001
MARS	2016-04-03 02:54	< 1 s	0.0394869	0.0394867	0.0000001
EARTH	2017-03-28 19:41	< 1 s	0.0426842	0.0426842	0.0000000
MARS	2025-08-29 00:26	< 1 s	0.0399062	0.0399059	0.0000001
EARTH	2027-07-17 00:51	< 1 s	0.0538707	0.0538705	0.0000001
MARS	2035-01-23 21:40	< 1 s	0.0401291	0.0401286	0.0000002
EARTH	2037-03-25 14:53	< 1 min	0.0513013	0.0513001	0.0000004
MARS	2044-06-19 21:54	< 1 s	0.0475574	0.0475568	0.0000002
EARTH	2047-07-12 08:59	< 1 min	0.1400706	0.1400694	0.0000004
EARTH	2054-07-22 11:40	< 1 s	0.1745494	0.1745484	0.0000003
EARTH	2057-03-22 09:23	< 1 s	0.1929750	0.1929742	0.0000003
EARTH	2064-03-31 11:20	< 1 s	0.1075540	0.1075535	0.0000001
EARTH	2074-07-18 14:24	< 1 s	0.0593744	0.0593742	0.0000001
EARTH	2084-03-26 11:55	< 1 s	0.0276987	0.0276978	0.0000003
EARTH	2094-07-10 20:32	< 1 s	0.1735086	0.1735081	0.0000002
EARTH	2101-07-21 07:29	< 1 min	0.0996068	0.0996057	0.0000004
EARTH	2111-03-28 06:05	< 1 min	0.0320261	0.0320240	0.0000007
EARTH	2118-04-05 23:23	< 1 s	0.1936032	0.1936029	0.0000001

Download as:

Stationary Points

Ecc. an. ast.	Ecc. an. Earth	Distance in au	Classification
81.15885499	83.37418463	0.00310196	MINIMUM
277.64636028	192.32321693	0.05238069	MINIMUM
358.20954503	316.35192359	0.62687045	SADDLE
179.73443158	138.19851024	0.85613717	SADDLE
358.08308986	136.11458832	1.37318230	SADDLE
179.60918022	318.15121131	2.85353131	MAXIMUM

Download:

MOID Plots

Click on the images to zoom-in and zoom-out