Hippo

00426, 1897 RA, 1897RA, I97R00A

All data for this body: [vot]

MPC data
Name (number) Hippo (426)
a 2.88728
e 0.10638
i / sin(i) 19.5017 / 0.33383
q 2.58012
Q 3.19443
ω 221.3923
Node 311.3067
m 171.1669
n 0.2009
Epoch 2460800.5
nobs 5492
nopp 60
Years observed 1897-2025
rms 0.67
Best values
[raw, vot]

Value Standard error
Parent
 
ap 2.889
ep 0.175
sin(ip) 0.349
G 0.150
H 8.560
Mass 1.544e+18 5.216e+17
D 123.63 0.629
pV 0.049 0.0019
Value
Rotational Period 67.500
Period quality 3
Spectral Class C
Spectral Class Score 36.444
Proper elements data
[raw, vot]

ap ep sin(ip) Author Reference Method
2.8892 0.1747 0.3492 Novakovic_Radovic_Todovic 2003A&A...403.1165K Numeric-Nov-2024
Mass data
[raw, vot]

Value Uncertainty up Uncertainty down Author Reference Method
1.5377e+18 7.3759e+17 7.3759e+17 Fienga INPOP19a Ephem
1.5500e+18 Folkner 2014IPNPR.196C...1F Ephem
Diameter data
[raw, vot]

Value Uncertainty up Uncertainty down Author Reference Method
107.33 4.405 4.405 Ryan&Woodward 2010AJ....140..933R IRAS-STM
113.90 1.330 1.330 Masiero 2014ApJ...791..121M NEATM
115.95 1.166 1.166 Masiero 2011ApJ...741...68M NEATM
118.60 nan nan Ali-Lagoa 2016A&A...591A..14A NEATM
118.78 39.470 39.470 Nugent 2016AJ....152...63N NEATM
121.29 2.250 2.250 Usui 2011PASJ...63.1117U NEATM
121.65 40.520 40.520 Masiero 2020PSJ.....1....5M NEATM
125.57 39.180 39.180 Masiero 2020PSJ.....1....5M NEATM
127.10 3.500 3.500 Tedesco 2002AJ....123.1056T STM
127.53 33.520 33.520 Masiero 2020PSJ.....1....5M NEATM
127.57 12.760 12.760 Ali-Lagoa 2018A&A...612A..85A NEATM
128.71 44.980 44.980 Masiero 2021PSJ.....2..162M NEATM
130.36 49.750 49.750 Nugent 2016AJ....152...63N NEATM
131.67 6.140 6.140 Ryan&Woodward 2010AJ....140..933R IRAS-NEATM
137.56 1.080 1.080 Masiero 2012ApJ...759L...8M NEATM
Albedo data
[raw, vot]

Value Uncertainty up Uncertainty down Author Reference Method
0.039 0.0230 0.0230 Masiero 2020PSJ.....1....5M NEATM
0.039 0.0180 0.0320 Masiero 2021PSJ.....2..162M NEATM
0.039 0.0340 0.0340 Masiero 2020PSJ.....1....5M NEATM
0.040 0.0090 0.0090 Masiero 2012ApJ...759L...8M NEATM
0.040 0.0500 0.0500 Nugent 2016AJ....152...63N NEATM
0.041 0.0380 0.0380 Masiero 2020PSJ.....1....5M NEATM
0.044 0.0041 0.0041 Ryan&Woodward 2010AJ....140..933R IRAS-NEATM
0.044 0.0090 0.0090 Ali-Lagoa 2018A&A...612A..85A NEATM
0.047 0.0030 0.0030 Tedesco 2002AJ....123.1056T STM
0.050 0.0400 0.0400 Nugent 2016AJ....152...63N NEATM
0.056 0.0061 0.0061 Masiero 2011ApJ...741...68M NEATM
0.060 0.0200 0.0200 Masiero 2014ApJ...791..121M NEATM
0.066 0.0052 0.0052 Ryan&Woodward 2010AJ....140..933R IRAS-STM
G data
[raw, vot]

Value Uncertainty up Uncertainty down Author Reference Method
0.15 MPC-2023-12-94 MPC-2023-12-94 Phot
H data
[raw, vot]

Value Uncertainty up Uncertainty down Author Reference Method
8.56 MPC-2023-12-04 MPC-2023-12-04 Phot
Periods
[raw, vot]

Value Quality Side real or Synodic Author Reference Method
32.0 2 Synodic Mohamed 1995AJ....109.1877M Lightcurve
34.3 2 Synodic Pray 2006MPBu...33....4P Lightcurve
66.78 2 Synodic Polakis 2021MPBu...48...23P Lightcurve
67.5 2 Sidereal Durech 2023A&A...675A..24D Model
67.504 2 Sidereal Durech 2018A&A...617A..57D Model
67.504 2 Sidereal Durech 2019A&A...631A...2D Model
67.52 3 Synodic Pilcher 2021MPBu...48....4P Lightcurve
67.5309 2 Synodic Pal 2020ApJS..247...26P Lightcurve
8.18 1 Synodic Behrend LCDB Lightcurve
Spectral Class Data
[raw, vot]

Class 1 Class 2 Probability of Class 1 Probability of Class 2 Taxonomy Wavelength Author Reference Method
B Bus-DeMeo VISNIR Clark 2010JGRE..115.6005C SPEC
B Tholen VIS Tatsumi 2022A&A...664A.107T SPEC
B 0.960000 Mahlke VISNIR Mahlke 2022A&A...665A..26M SPEC
C Bus-DeMeo VISNIR Hasegawa 2024AJ....167..224H SPEC
C Tholen VIS Tatsumi 2022A&A...664A.107T SPEC
C 0.768 Bus-Demeo VIS Sergeyev 2022A&A...658A.109S PHOT
C C 0.0160 0.0040 Bus-Demeo VIS Sergeyev 2021A&A...652A..59S PHOT
C P 0.820000 0.170000 Mahlke VISNIR Mahlke 2022A&A...665A..26M SPEC
F Tholen VIS Tatsumi 2022A&A...664A.107T SPEC
G Tholen VIS Tatsumi 2022A&A...664A.107T SPEC
S P 0.660000 0.310000 Mahlke VIS Mahlke 2022A&A...665A..26M SPEC
X Bus VIS Lazzaro 2004Icar..172..179L SPEC
X Tholen VIS Lazzaro 2004Icar..172..179L SPEC