Asteroids

2014HB177 help

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

Orbital Properties

Epoch

61000.0

MJD

Orbit type

Apollo

Perihelion (q)

0.897

Aphelion (Q)

1.331

Eccentricity (e)

0.195

Inclination (i)

3.5

deg

Orbit period (P)

429.6

Earth MOID

0.00003

U parameter

6.3

Next Earth close approach

Date

2034-05-06

Nominal distance (from Earth center)

0.00147

220402

Maximum Brightness

16.1

mag

Risk

Object is in risk list

Physical Properties

Absolute Magnitude (H)

28.1

mag

Diameter

6 - 14*

Taxonomic type

Rotation period (T)

Discovery Information

Discovery Date

2014-04-29

Observatory

Pan-STARRS 1, Haleakala

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

1.114252

1-sigma variation

0.000048

Unit

Eccentricity (e)

Value

0.194659

1-sigma variation

0.000052

Unit

Inclination (i)

Value

3.4741

1-sigma variation

0.0017

Unit

Long. of Ascending Node (Ω)

Value

45.1164

1-sigma variation

0.0102

Unit

Arg. of Perihelion (ω)

Value

251.6250

1-sigma variation

0.0040

Unit

Mean Anomaly (M)

Value

240.98313

1-sigma variation

0.25613

Unit

Perihelion distance

Value

0.897353

1-sigma variation

Unit

Aphelion distance

Value

1.331152

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

0.150922

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

-0.000084

1-sigma variation

Unit

MOID

Value

0.000028

1-sigma variation

Unit

Orbit Period

Value

429.6094

1-sigma variation

Unit

U parameter

Value

6.3

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	2.29026E-9	2.49219E-9	7.98844E-8	-4.88566E-7	1.92271E-7	-1.22575E-5
e	2.49219E-9	2.71258E-9	8.69384E-8	-5.31641E-7	2.09363E-7	-1.33382E-5
i	7.98844E-8	8.69384E-8	2.78661E-6	-1.70412E-5	6.70878E-6	-4.27541E-4
Ω	-4.88566E-7	-5.31641E-7	-1.70412E-5	1.04223E-4	-4.10155E-5	2.61480E-3
ω	1.92271E-7	2.09363E-7	6.70878E-6	-4.10155E-5	1.61716E-5	-1.02904E-3
M	-1.22575E-5	-1.33382E-5	-4.27541E-4	2.61480E-3	-1.02904E-3	6.56019E-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

28.144

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

6 - 14*

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

Unit

Source

[1]

Unobserved

Value

4190

Unit

Source

[1]

Normalized RMS of residuals

Value

0.387523

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

2014-04-29.36076

Unit

Source

[2]

Last Observation

Value

2014-05-05.03469

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

36 (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 2014HB177 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	1955-05-17 03:22	> 1 mo	0.0567445	0.0038374	14.4084366
EARTH	1968-09-27 07:49	> 1 mo	0.0439665	0.0404429	0.9790215
EARTH	1974-05-07 05:54	> 1 d	0.0042937	0.0000459	0.0141741
EARTH	1980-09-19 20:55	1150.7	0.0495878	0.0450145	0.0028824
EARTH	1991-04-24 17:32	439.0	0.1756652	0.1538117	0.0072847
EARTH	1997-07-06 06:46	> 1 d	0.1188370	0.1163074	0.0008587
EARTH	2003-10-02 04:54	272.3	0.1561624	0.1425508	0.0045559
EARTH	2014-05-06 07:27	< 1 min	0.0033386	0.0033361	0.0000009
EARTH	2021-09-22 21:01	1124.0	0.0722117	0.0636585	0.0029156
MOON	2034-05-05 15:41	705.8	0.0000560	0.0000495	0.0038989
EARTH	2034-05-06 06:40	1403.2	0.0014733	0.0014630	0.0010040
EARTH	2044-10-14 10:24	> 1 mo	0.0425293	0.0179361	117.5158762
EARTH	2053-04-20 23:39	> 1 mo	0.1607069	0.0349170	38.6350290
EARTH	2053-06-21 06:23	> 1 mo	0.1275127	0.0386288	18.4244795
EARTH	2062-04-26 10:42	> 1 mo	0.1672805	0.0018993	53.8548992
EARTH	2063-10-20 09:00	> 1 mo	0.0367289	0.0181853	57.8792795
EARTH	2072-08-23 07:12	> 1 mo	0.1369537	0.0423317	10.2603949
EARTH	2072-11-14 02:52	> 1 mo	0.1753532	0.0480788	25.0204524
EARTH	2081-06-13 07:52	> 1 mo	0.1165109	0.0302870	66.1433981
EARTH	2090-05-02 13:06	> 1 mo	0.0619037	0.0011200	177.5575092
EARTH	2091-10-26 13:12	> 1 mo	0.1507095	0.0168268	145.5717551
EARTH	2100-09-22 01:11	> 1 mo	0.1040328	0.0045727	83.2144419
EARTH	2109-06-16 07:06	> 1 mo	0.1194416	0.0265313	169.2461885
EARTH	2118-04-30 05:55	> 1 mo	0.1247647	0.0002096	470.2585778
EARTH	2119-10-24 11:54	> 1 mo	0.0856618	0.0170008	457.8081937

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Stationary Points

Ecc. an. ast.	Ecc. an. Earth	Distance in au	Classification
299.06527486	122.45094728	0.00044129	MINIMUM
61.15726311	266.93871351	0.03764268	MINIMUM
1.08066182	196.05709335	0.13059825	SADDLE
180.04348950	14.31012121	0.35315067	SADDLE
358.97282060	13.43176967	1.88070928	SADDLE
179.01726294	193.47102417	2.34595448	MAXIMUM

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MOID Plots

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

Level lines of the squared distance function

2014HB177

Date in UTC	MJD	σ	Distance ± Width in RE	Stretching in RE	IP	Impact energy	PS
2059-05-04.037	73217.037	0.125	1.06 ± 0.027	2.87E6	5.73E-7	1.08E-2	-7.83
2079-11-07.213	80709.213	0.081	0.32 ± 0.506	1.71E8	9.28E-9	1.08E-2	-9.83
2085-05-03.941	82713.941	0.103	1.12 ± 0.014	7.24E5	1.98E-6	1.08E-2	-7.53
2097-05-03.575	87096.575	0.114	0.58 ± 0.000	1.33E7	1.23E-7	1.08E-2	-8.81
2098-05-03.738	87461.738	0.107	1.88 ± 0.016	8.02E6	2.04E-7	1.08E-2	-8.60
2099-05-04.170	87827.170	0.106	0.23 ± 0.014	1.08E7	1.52E-7	1.08E-2	-8.73
2110-05-05.818	91845.818	0.085	0.04 ± 3.507	1.24E9	4.75E-10	1.08E-2	-11.30


Based on 36 optical observations (of which 0 are rejected as outliers) from 2014/04/29.361 to 2014/05/05.035.
Coordinates are given on the Target Plane.
Unit is one Earth radius, but impact cross section has radius between 2.09 and 2.09 Earth radii.
Coordinates for LOV = EQU scaled= 1 second= F.
AstOD software version= 4.0, Date of computation=20250805 130500.123 UTC.

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