| Parameter |
Value |
| Designation |
C/1993 Q1 (Mueller) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
1994-03-26T06:39:06.874560Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:29:47Z |
| Obs used |
495 |
| NEO |
- |
| M1 |
9.800 |
| K1 |
4.500 |
| PC |
- |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
1993-10-28.0000000 |
| e |
1.00032242 |
| q (au) |
0.967251 |
| a (au) |
-2999.968986 |
| i (deg) |
105.026500 |
| Ω (om, deg) |
193.788984 |
| ω (w, deg) |
261.032961 |
| M (ma, deg) |
-0.000895 |
Magnitude
Scatter + Global Linear
$$
M_a = (8.169 + 4.619\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
8.169 |
| n |
4.619 |
| gf |
1.000 |
| gb |
-0.687 |
| k |
0.800 |
| δ90 |
10.000 |
| 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 |
| 1992-09-28 |
1993-12-09 |
-0.3959 |
+0.181 |
| 1993-12-09 |
1994-02-02 |
+0.8399 |
-0.656 |
| 1994-04-01 |
1994-07-02 |
+14.9311 |
-0.152 |
log10 r = log10(heliocentric distance / AU), Δ = geocentric distance (AU)
Ephemeris
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-06-01 00:00 |
13:42:02.46 |
+60:14:27.4 |
HIP 67002 |
14.80 |
| 2026-06-01 12:00 |
13:41:59.61 |
+60:14:10.9 |
HIP 67002 |
15.03 |
| 2026-06-02 00:00 |
13:41:56.77 |
+60:13:54.2 |
HIP 67002 |
15.26 |
| 2026-06-02 12:00 |
13:41:53.97 |
+60:13:37.2 |
HIP 67002 |
15.50 |
| 2026-06-03 00:00 |
13:41:51.18 |
+60:13:20.1 |
HIP 67002 |
15.74 |
| 2026-06-03 12:00 |
13:41:48.42 |
+60:13:02.8 |
HIP 67002 |
15.99 |
| 2026-06-04 00:00 |
13:41:45.69 |
+60:12:45.3 |
HIP 67002 |
16.25 |
| 2026-06-04 12:00 |
13:41:42.98 |
+60:12:27.5 |
HIP 67002 |
16.50 |
| 2026-06-05 00:00 |
13:41:40.29 |
+60:12:09.6 |
HIP 67002 |
16.77 |
| 2026-06-05 12:00 |
13:41:37.63 |
+60:11:51.5 |
HIP 67002 |
17.03 |
| 2026-06-06 00:00 |
13:41:35.00 |
+60:11:33.2 |
HIP 67002 |
17.31 |
| 2026-06-06 12:00 |
13:41:32.39 |
+60:11:14.7 |
HIP 67002 |
17.58 |
| 2026-06-07 00:00 |
13:41:29.80 |
+60:10:56.0 |
HIP 67002 |
17.86 |
| 2026-06-07 12:00 |
13:41:27.25 |
+60:10:37.2 |
HIP 67002 |
18.14 |
| 2026-06-08 00:00 |
13:41:24.72 |
+60:10:18.1 |
HIP 67002 |
18.43 |
| 2026-06-08 12:00 |
13:41:22.21 |
+60:09:58.9 |
HIP 67002 |
18.71 |
| 2026-06-09 00:00 |
13:41:19.73 |
+60:09:39.4 |
HIP 67002 |
19.00 |
| 2026-06-09 12:00 |
13:41:17.28 |
+60:09:19.8 |
HIP 67002 |
19.30 |
| 2026-06-10 00:00 |
13:41:14.86 |
+60:09:00.0 |
HIP 67002 |
19.59 |
| 2026-06-10 12:00 |
13:41:12.46 |
+60:08:40.0 |
HIP 67002 |
19.89 |
| 2026-06-11 00:00 |
13:41:10.09 |
+60:08:19.9 |
HIP 67002 |
20.19 |
| 2026-06-11 12:00 |
13:41:07.75 |
+60:07:59.6 |
HIP 67002 |
20.49 |
| 2026-06-12 00:00 |
13:41:05.43 |
+60:07:39.0 |
HIP 67002 |
20.80 |
| 2026-06-12 12:00 |
13:41:03.15 |
+60:07:18.4 |
HIP 67002 |
21.11 |
| 2026-06-13 00:00 |
13:41:00.89 |
+60:06:57.5 |
HIP 67002 |
21.41 |
| 2026-06-13 12:00 |
13:40:58.66 |
+60:06:36.5 |
HIP 67002 |
21.72 |
| 2026-06-14 00:00 |
13:40:56.45 |
+60:06:15.3 |
HIP 67002 |
22.04 |
| 2026-06-14 12:00 |
13:40:54.28 |
+60:05:54.0 |
HIP 67002 |
22.35 |
| 2026-06-15 00:00 |
13:40:52.13 |
+60:05:32.4 |
HIP 67002 |
22.66 |
| 2026-06-15 12:00 |
13:40:50.02 |
+60:05:10.7 |
HIP 67002 |
22.98 |
| 2026-06-16 00:00 |
13:40:47.93 |
+60:04:48.9 |
HIP 67002 |
23.30 |
| 2026-06-16 12:00 |
13:40:45.87 |
+60:04:26.9 |
HIP 67002 |
23.62 |
| 2026-06-17 00:00 |
13:40:43.84 |
+60:04:04.7 |
HIP 67002 |
23.94 |
| 2026-06-17 12:00 |
13:40:41.84 |
+60:03:42.4 |
HIP 67002 |
24.26 |
| 2026-06-18 00:00 |
13:40:39.87 |
+60:03:20.0 |
HIP 67002 |
24.58 |
| 2026-06-18 12:00 |
13:40:37.93 |
+60:02:57.3 |
HIP 67002 |
24.90 |
| 2026-06-19 00:00 |
13:40:36.01 |
+60:02:34.6 |
HIP 67002 |
25.23 |
| 2026-06-19 12:00 |
13:40:34.13 |
+60:02:11.6 |
HIP 67002 |
25.55 |
| 2026-06-20 00:00 |
13:40:32.28 |
+60:01:48.6 |
HIP 67002 |
25.88 |
| 2026-06-20 12:00 |
13:40:30.46 |
+60:01:25.4 |
HIP 67002 |
26.20 |
| 2026-06-21 00:00 |
13:40:28.66 |
+60:01:02.0 |
HIP 67002 |
26.53 |
| 2026-06-21 12:00 |
13:40:26.90 |
+60:00:38.6 |
HIP 67002 |
26.86 |
| 2026-06-22 00:00 |
13:40:25.17 |
+60:00:14.9 |
HIP 66988 |
26.93 |