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44 Nysa (A857 KA)
Classification: Main-belt Asteroid          SPK-ID: 2000044
[ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ hide orbit diagram ]

For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 120 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1479927772388983 3.311e-08  
a 2.424859144674044 3.7473e-09 au
q 2.065997505440593 8.0037e-08 au
i 3.710079304891163 3.6674e-06 deg
node 131.4947791790636 5.1134e-05 deg
peri 343.8644776040374 5.2328e-05 deg
M 186.5544315519276 1.1984e-05 deg
tp 2459664.990702464440
(2022-Mar-26.49070246)		 4.6378e-05 TDB
period 1379.203026215207
3.78		 3.197e-06
8.753e-09		 d
yr
n .261020308944585 6.0505e-10 deg/d
Q 2.783720783907496 4.3018e-09 au
   Orbit Determination Parameters
   # obs. used (total)      2810  
   data-arc span      57237 days (156.71 yr)  
   first obs. used      1864-03-02  
   last obs. used      2020-11-16  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .56161  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Dec-18 01:50:36  

Additional Information
 Earth MOID = 1.08264 au 
 Jupiter MOID = 2.30431 au 
 T_jup = 3.493 
[ hide covariance matrix ]
Orbital Elements at Epoch 2451960.5 (2001-Feb-20.0) TDB
Reference: JPL 120 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1482812110386707 3.3299e-08  
q 2.064574364971669 8.0563e-08 au
tp 2451390.246933629026
(1999-Jul-30.74693363)		 4.2207e-05 TDB
node 131.6138548816164 5.1304e-05 deg
peri 342.639572304991 5.2466e-05 deg
i 3.702396208551551 3.6647e-06 deg
   Orbit Determination Parameters
   # obs. used (total)      2810  
   data-arc span      57237 days (156.71 yr)  
   first obs. used      1864-03-02  
   last obs. used      2020-11-16  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .56161  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Dec-18 01:50:36  

Additional Information
 Jupiter MOID = 2.30431 au 
 T_jup = 3.493 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.108803641345685E-15 -2.680821665541758E-15 -4.580967995501662E-14 -7.559859166386256E-16 -9.337122217634708E-15 -2.606069073085349E-16
q -2.680821665541758E-15 6.490416799890868E-15 1.17117356996658E-13 1.682392945794413E-15 2.5038034224076E-14 6.731171493615294E-16
tp -4.580967995501662E-14 1.17117356996658E-13 1.781431833515085E-9 1.882967922145193E-13 4.727602756289407E-10 -1.881454602141152E-13
node -7.559859166386256E-16 1.682392945794413E-15 1.882967922145193E-13 2.632127912364191E-9 -2.626362539398591E-9 -1.401634238254696E-11
peri -9.337122217634708E-15 2.5038034224076E-14 4.727602756289407E-10 -2.626362539398591E-9 2.752633668618391E-9 1.395045304126777E-11
i -2.606069073085349E-16 6.731171493615294E-16 -1.881454602141152E-13 -1.401634238254696E-11 1.395045304126777E-11 1.343038133414617E-11

[ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 6.9   n/a MPO492748 IRAS observations used: 18
magnitude slope G 0.46   n/a PDS3 (MPC 17257) Fit
diameter diameter 70.64 km 4.0 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 18
rotation period rot_per 6.422 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List:
[Bianchi, E.; Padova, E. (1920) Mem. Soc. Astron. Ital. 1, 56-65.]
[Padova, E. (1921) Mem. Soc. Astron. Ital. 2, 82.]
[Groeneveld, I.; Kuiper, G.P. (1954) Astrophys. J. 120, 529-546.]
[Shatzel, A.V. (1954) Astrophys. J. 120, 547-550.]
[Cailliate, C. (1956) Publ. Observ. Lyon 3, fasc. 28.]
[Chang, Y.C.; Chang, C.-s. (1962) Acta Astron. Sin. 10, 101-111.]
[Gehrels, T.; Owings, D. (1962) Astrophys. J. 135, 906-924.]
[Yang, X.-y.; Zhang, Y.-y.; Li, X.-q. (1965) Acta Astron. Sin. 13, 66-74.]
[Zappala, V.; van Houten-Groeneveld, I. (1979) Icarus 40, 289-296.]
[Birch, P.V.; Tedesco, E.F.; Taylor, R.C.; Binzel, R.P.; et al. (1983) Icarus 54, 1-12.]
[Harris, A.W.; Young, J.W. (1983) Icarus 54, 59-109.]
[Magnusson, P. (1983) in Asteroids, Comets, Meteors. C.-I. Lagerkvist, H. Rickman, eds. Uppsala, pp. 77-85.]
[Taylor, R.C.; Tedesco, E.F. (1983) Icarus 54, 13-22.]
[Magnusson, P. (1986) Icarus 68, 1-39.]
[Di Martino, M.; Zappala, V.; De Sanctis, G.; Cacciatori, S. (1987) Icarus 69, 338-353.]
[Lagerkvist, C.-I.; Williams, I.P. (1987) Astron. Astrophys. Suppl. Ser. 68, 295-315.]
[Lagerkvist, C.I.; Magnusson, P.; Williams, I.P.; Buontempo, M.E.; et al. (1988) Astron. Astrophys. Suppl. Ser. 73, 395-405.]
[Harris, A.W.; Young, J.W.; Contreiras, L.; Dockweiler, T.; et al. (1989) Icarus 81, 365-374.]
[Lagerkvist, C.I.; Magnusson, P.; Williams, I.P.; Buontempo, M.E.; et al. (1989) Astron. Astrophys. Suppl. Ser. 78, 519-532.]
[De Angelis, G. (1993) Planet. Space Sci. 41, 285-290.]
[Kaasalainen, M.; Torppa, J.; Piironen, J. (2002) Astron. Astrophys. 383, L19-L22.]
[Behrend, R. (2007) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Rosenbush, V.K.; Shevchenko, V.G.; Kiselev, N.N.; Sergeev, A.V.; et al. (2009) Icarus 201, 655-665.]
[Shevchenko, V.G.; Velichko, F.P.; Checha, V.A.; Krugly, Y.N. (2014) Minor Planet Bull. 41, 195-198.]
[Behrend, R. (2019) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Cellino, A.; Hestroffer, D.; Lu, X.-P.; Muinonen, K.; Tanga, P. (2019) Astron. Astrophys. 631, A67.]
geometric albedo albedo 0.482   0.031 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  
B-V BV 0.703   0.020 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=19; phase (min.=4.95, mean=15.61, max.=27.78) deg.
U-B UB 0.245   0.030 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=18; phase (min.=5.27, mean=17.16, max.=27.78) deg.
Tholen spectral type spec_T E   n/a EAR-A-5-DDR-TAXONOMY-V4.0 used 7 color indices; used ground-based radiometric albedo
SMASSII spectral type spec_B Xc   n/a EAR-A-5-DDR-TAXONOMY-V4.0 based on a high-resolution spectrum by Xu et al. (1995) or Bus and Binzel (2002)

44 Nysa (A857 KA)          Discovered 1857-May-27 by Goldschmidt, H. at Paris
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ hide close-approach data ]
Close-Approach Data   ...sorted by Date/Time (TDB)
Date/Time (TDB) Time Uncertainty
(days_HH:MM)		 Body Nominal Distance (au) Minimum Distance (au) Maximum Distance (au) V-relative (km/s) V-infinity (km/s) JD (TDB) Time Uncertainty (minutes) Semi-major axis (km) Semi-minor axis (km) range-LOV angle (deg) N-sigma BP Orbit Ref. Reference Modified
2014-Aug-13 11:10 < 00:01 Iris 0.0480144110071121 0.0480139643272001 0.0480148576900505 5.33935599398785 5.33935597156388 2456882.965390078 0.151929832987724 39.8480384027278 18.2180864625335 68.8233052150158 373249.744952209 T 120 CATAB v2.0f-lin.ifort 2020-Dec-18 01:50:44 2020-Dec-18 01:50

Alternate Designations
 A857 KA = 1977 CE 
[ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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