| Parameter |
Value |
| Designation |
C/1950 K1 (Minkowski) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
1951-01-15T01:00:02.396160Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:29:09Z |
| Obs used |
32 |
| NEO |
- |
| M1 |
- |
| K1 |
- |
| PC |
- |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
1951-02-12.0000000 |
| e |
1.00121746 |
| q (au) |
2.572332 |
| a (au) |
-2112.865342 |
| i (deg) |
144.155299 |
| Ω (om, deg) |
38.890420 |
| ω (w, deg) |
192.467845 |
| M (ma, deg) |
0.000284 |
Magnitude
Scatter + Global Linear
$$
M_a = (5.948 + 2.647\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
5.948 |
| n |
2.647 |
| gf |
0.952 |
| gb |
-0.765 |
| k |
0.984 |
| δ90 |
1.000 |
| 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
Residuals (Piecewise)
$$\epsilon = a \log_{10} r_{\mathrm{au}} + b$$
| Start (UTC) |
End (UTC) |
a |
b |
| 1950-06-06 |
1951-01-14 |
+2.1156 |
-1.155 |
| 1951-01-19 |
1951-06-30 |
+15.8103 |
-6.727 |
log10 r = log10(heliocentric distance / AU), Δ = geocentric distance (AU)
Ephemeris
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-09-20 00:00 |
02:51:43.39 |
+12:40:39.7 |
HIP 13201 |
26.84 |
| 2026-09-20 12:00 |
02:51:42.56 |
+12:40:35.4 |
HIP 13201 |
26.64 |
| 2026-09-21 00:00 |
02:51:41.72 |
+12:40:31.0 |
HIP 13201 |
26.43 |
| 2026-09-21 12:00 |
02:51:40.87 |
+12:40:26.6 |
HIP 13201 |
26.22 |
| 2026-09-22 00:00 |
02:51:40.02 |
+12:40:22.2 |
HIP 13201 |
26.01 |
| 2026-09-22 12:00 |
02:51:39.16 |
+12:40:17.8 |
HIP 13201 |
25.80 |
| 2026-09-23 00:00 |
02:51:38.29 |
+12:40:13.4 |
HIP 13201 |
25.58 |
| 2026-09-23 12:00 |
02:51:37.41 |
+12:40:08.9 |
HIP 13201 |
25.37 |
| 2026-09-24 00:00 |
02:51:36.53 |
+12:40:04.4 |
HIP 13201 |
25.15 |
| 2026-09-24 12:00 |
02:51:35.64 |
+12:39:59.9 |
HIP 13201 |
24.93 |
| 2026-09-25 00:00 |
02:51:34.74 |
+12:39:55.3 |
HIP 13201 |
24.71 |
| 2026-09-25 12:00 |
02:51:33.84 |
+12:39:50.7 |
HIP 13201 |
24.49 |
| 2026-09-26 00:00 |
02:51:32.93 |
+12:39:46.1 |
HIP 13201 |
24.26 |
| 2026-09-26 12:00 |
02:51:32.01 |
+12:39:41.5 |
HIP 13201 |
24.04 |
| 2026-09-27 00:00 |
02:51:31.08 |
+12:39:36.9 |
HIP 13201 |
23.81 |
| 2026-09-27 12:00 |
02:51:30.15 |
+12:39:32.2 |
HIP 13201 |
23.58 |
| 2026-09-28 00:00 |
02:51:29.21 |
+12:39:27.5 |
HIP 13201 |
23.35 |
| 2026-09-28 12:00 |
02:51:28.26 |
+12:39:22.8 |
HIP 13201 |
23.12 |
| 2026-09-29 00:00 |
02:51:27.31 |
+12:39:18.1 |
HIP 13201 |
22.89 |
| 2026-09-29 12:00 |
02:51:26.35 |
+12:39:13.3 |
HIP 13201 |
22.66 |
| 2026-09-30 00:00 |
02:51:25.39 |
+12:39:08.5 |
HIP 13201 |
22.42 |
| 2026-09-30 12:00 |
02:51:24.41 |
+12:39:03.7 |
HIP 13201 |
22.19 |
| 2026-10-01 00:00 |
02:51:23.44 |
+12:38:58.9 |
HIP 13201 |
21.95 |
| 2026-10-01 12:00 |
02:51:22.45 |
+12:38:54.0 |
HIP 13201 |
21.71 |
| 2026-10-02 00:00 |
02:51:21.46 |
+12:38:49.2 |
HIP 13201 |
21.47 |
| 2026-10-02 12:00 |
02:51:20.46 |
+12:38:44.3 |
HIP 13201 |
21.23 |
| 2026-10-03 00:00 |
02:51:19.46 |
+12:38:39.4 |
HIP 13201 |
20.99 |
| 2026-10-03 12:00 |
02:51:18.45 |
+12:38:34.5 |
HIP 13201 |
20.74 |
| 2026-10-04 00:00 |
02:51:17.43 |
+12:38:29.5 |
HIP 13201 |
20.50 |
| 2026-10-04 12:00 |
02:51:16.41 |
+12:38:24.6 |
HIP 13201 |
20.25 |
| 2026-10-05 00:00 |
02:51:15.38 |
+12:38:19.6 |
HIP 13201 |
20.01 |
| 2026-10-05 12:00 |
02:51:14.35 |
+12:38:14.6 |
HIP 13201 |
19.76 |
| 2026-10-06 00:00 |
02:51:13.31 |
+12:38:09.6 |
HIP 13201 |
19.51 |
| 2026-10-06 12:00 |
02:51:12.26 |
+12:38:04.5 |
HIP 13201 |
19.26 |
| 2026-10-07 00:00 |
02:51:11.21 |
+12:37:59.5 |
HIP 13201 |
19.01 |
| 2026-10-07 12:00 |
02:51:10.16 |
+12:37:54.4 |
HIP 13201 |
18.76 |
| 2026-10-08 00:00 |
02:51:09.09 |
+12:37:49.3 |
HIP 13201 |
18.51 |
| 2026-10-08 12:00 |
02:51:08.03 |
+12:37:44.2 |
HIP 13201 |
18.26 |
| 2026-10-09 00:00 |
02:51:06.95 |
+12:37:39.1 |
HIP 13201 |
18.01 |
| 2026-10-09 12:00 |
02:51:05.88 |
+12:37:34.0 |
HIP 13201 |
17.75 |
| 2026-10-10 00:00 |
02:51:04.79 |
+12:37:28.9 |
HIP 13201 |
17.50 |
| 2026-10-10 12:00 |
02:51:03.70 |
+12:37:23.7 |
HIP 13201 |
17.24 |
| 2026-10-11 00:00 |
02:51:02.61 |
+12:37:18.6 |
HIP 13201 |
16.99 |