137P/Shoemaker-Levy 2

Metadata

Parameter Value
Designation 137P/Shoemaker-Levy 2
Type P
Perihelion (tp_cal, UTC) 2018-12-14T01:58:07.469760Z
Orbit solution date (soln_date, UTC) 2026-06-18T16:12:29Z
Obs used 1230
NEO -
M1 15.400
K1 4.500
PC -
Osculating Elements
Parameter Value
Epoch (epoch_cal, TDB) 2015-12-22.0000000
e 0.57204950
q (au) 1.933411
a (au) 4.517839
i (deg) 4.850317
Ω (om, deg) 233.073500
ω (w, deg) 140.986329
M (ma, deg) 248.321485

Magnitude

137P/Shoemaker-Levy 2 · Magnitude (Full range)

Scatter + Global Linear

$$ M_a = (H_0 + n\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta $$ $$ \theta = 180^\circ - \alpha $$ $$ \Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b) $$ $$ \Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1 $$

Model Parameters

Parameter Value
H0 -
n -
gf -
gb -
k -
δ90 -
Parameter Symbol Range Description
Absolute magnitude at 1 AU from Sun and Earth H0 -5 to 20 Intrinsic brightness of the comet
Photometric slope parameter n 2 to 6 Rate of brightness change with heliocentric distance
Forward scattering asymmetry factor gf 0.8 to 1 Degree of forward scattering
Backward scattering asymmetry factor gb -1 to -0.5 Degree of backward scattering
Partitioning coefficient k 0.8 to 1 Ratio between forward/backward scattering contributions
Dust-to-gas brightness ratio δ90 1 to 10 Relative contribution of dust scattering to gas emission

Reference: EPSC-DPS2025-160

Finding Chart

137P/Shoemaker-Levy 2 · Next 30 Days

Ephemeris

Date/Time (UTC) RA (J2000) Dec (J2000) Nearest HIP Dist from HIP (arcmin)
2026-07-29 00:00 14:53:35.17 -16:13:59.1 HIP 72947 16.31
2026-07-29 12:00 14:53:38.13 -16:14:03.5 HIP 72947 15.70
2026-07-30 00:00 14:53:41.27 -16:14:08.8 HIP 72947 15.05
2026-07-30 12:00 14:53:44.60 -16:14:14.8 HIP 72947 14.37
2026-07-31 00:00 14:53:48.11 -16:14:21.7 HIP 72947 13.66
2026-07-31 12:00 14:53:51.81 -16:14:29.3 HIP 72947 12.93
2026-08-01 00:00 14:53:55.68 -16:14:37.8 HIP 72947 12.18
2026-08-01 12:00 14:53:59.75 -16:14:47.1 HIP 72947 11.42
2026-08-02 00:00 14:54:03.99 -16:14:57.2 HIP 72947 10.66
2026-08-02 12:00 14:54:08.42 -16:15:08.1 HIP 72947 9.92
2026-08-03 00:00 14:54:13.02 -16:15:19.9 HIP 72947 9.20
2026-08-03 12:00 14:54:17.81 -16:15:32.4 HIP 72947 8.55
2026-08-04 00:00 14:54:22.78 -16:15:45.7 HIP 72947 8.00
2026-08-04 12:00 14:54:27.93 -16:15:59.8 HIP 72947 7.58
2026-08-05 00:00 14:54:33.26 -16:16:14.7 HIP 72947 7.35
2026-08-05 12:00 14:54:38.77 -16:16:30.4 HIP 72947 7.35
2026-08-06 00:00 14:54:44.46 -16:16:46.9 HIP 72947 7.59
2026-08-06 12:00 14:54:50.33 -16:17:04.2 HIP 72947 8.09
2026-08-07 00:00 14:54:56.38 -16:17:22.2 HIP 72947 8.82
2026-08-07 12:00 14:55:02.61 -16:17:41.1 HIP 72947 9.74
2026-08-08 00:00 14:55:09.01 -16:18:00.7 HIP 72947 10.84
2026-08-08 12:00 14:55:15.59 -16:18:21.1 HIP 72947 12.07
2026-08-09 00:00 14:55:22.35 -16:18:42.2 HIP 72947 13.42
2026-08-09 12:00 14:55:29.29 -16:19:04.2 HIP 72947 14.87
2026-08-10 00:00 14:55:36.40 -16:19:26.8 HIP 72947 16.40
2026-08-10 12:00 14:55:43.69 -16:19:50.3 HIP 72947 18.01
2026-08-11 00:00 14:55:51.15 -16:20:14.5 HIP 72947 19.70
2026-08-11 12:00 14:55:58.79 -16:20:39.5 HIP 73161 19.34
2026-08-12 00:00 14:56:06.60 -16:21:05.2 HIP 73161 17.53
2026-08-12 12:00 14:56:14.59 -16:21:31.6 HIP 73161 15.72
2026-08-13 00:00 14:56:22.75 -16:21:58.8 HIP 73161 13.90
2026-08-13 12:00 14:56:31.08 -16:22:26.7 HIP 73161 12.10
2026-08-14 00:00 14:56:39.59 -16:22:55.4 HIP 73161 10.36
2026-08-14 12:00 14:56:48.26 -16:23:24.7 HIP 73161 8.75
2026-08-15 00:00 14:56:57.11 -16:23:54.8 HIP 73161 7.39
2026-08-15 12:00 14:57:06.13 -16:24:25.7 HIP 73161 6.47
2026-08-16 00:00 14:57:15.31 -16:24:57.2 HIP 73161 6.25
2026-08-16 12:00 14:57:24.67 -16:25:29.4 HIP 73191 6.19
2026-08-17 00:00 14:57:34.19 -16:26:02.3 HIP 73191 5.37
2026-08-17 12:00 14:57:43.88 -16:26:36.0 HIP 73191 5.52
2026-08-18 00:00 14:57:53.74 -16:27:10.3 HIP 73191 6.62
2026-08-18 12:00 14:58:03.76 -16:27:45.3 HIP 73191 8.33
2026-08-19 00:00 14:58:13.95 -16:28:21.0 HIP 73191 10.39