| Parameter |
Value |
| Designation |
C/2007 M3 (LINEAR) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2007-09-04T15:02:43.900800Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:31:10Z |
| Obs used |
680 |
| NEO |
- |
| M1 |
10.000 |
| K1 |
8.750 |
| PC |
0.030 |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
2007-08-18.0000000 |
| e |
0.97975971 |
| q (au) |
3.468759 |
| a (au) |
171.378889 |
| i (deg) |
161.760899 |
| Ω (om, deg) |
41.620749 |
| ω (w, deg) |
125.739479 |
| M (ma, deg) |
359.992256 |
Magnitude
Scatter + Global Linear
$$
M_a = (5.660 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
5.660 |
| n |
6.000 |
| gf |
1.000 |
| gb |
-1.000 |
| k |
1.000 |
| 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 |
| 2006-11-12 |
2007-09-03 |
+12.7086 |
-6.767 |
| 2007-09-06 |
2008-07-01 |
+1.6882 |
-1.461 |
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 |
08:27:00.17 |
+00:38:35.6 |
HIP 41471 |
13.59 |
| 2026-06-01 12:00 |
08:27:01.77 |
+00:38:42.7 |
HIP 41471 |
13.26 |
| 2026-06-02 00:00 |
08:27:03.40 |
+00:38:49.6 |
HIP 41471 |
12.94 |
| 2026-06-02 12:00 |
08:27:05.05 |
+00:38:56.3 |
HIP 41471 |
12.63 |
| 2026-06-03 00:00 |
08:27:06.72 |
+00:39:02.9 |
HIP 41471 |
12.32 |
| 2026-06-03 12:00 |
08:27:08.41 |
+00:39:09.3 |
HIP 41471 |
12.02 |
| 2026-06-04 00:00 |
08:27:10.12 |
+00:39:15.6 |
HIP 41471 |
11.73 |
| 2026-06-04 12:00 |
08:27:11.85 |
+00:39:21.7 |
HIP 41471 |
11.44 |
| 2026-06-05 00:00 |
08:27:13.60 |
+00:39:27.6 |
HIP 41471 |
11.17 |
| 2026-06-05 12:00 |
08:27:15.36 |
+00:39:33.4 |
HIP 41471 |
10.91 |
| 2026-06-06 00:00 |
08:27:17.15 |
+00:39:39.1 |
HIP 41471 |
10.67 |
| 2026-06-06 12:00 |
08:27:18.96 |
+00:39:44.5 |
HIP 41471 |
10.44 |
| 2026-06-07 00:00 |
08:27:20.79 |
+00:39:49.9 |
HIP 41471 |
10.22 |
| 2026-06-07 12:00 |
08:27:22.63 |
+00:39:55.0 |
HIP 41471 |
10.03 |
| 2026-06-08 00:00 |
08:27:24.50 |
+00:40:00.0 |
HIP 41471 |
9.85 |
| 2026-06-08 12:00 |
08:27:26.38 |
+00:40:04.9 |
HIP 41471 |
9.70 |
| 2026-06-09 00:00 |
08:27:28.29 |
+00:40:09.6 |
HIP 41471 |
9.57 |
| 2026-06-09 12:00 |
08:27:30.21 |
+00:40:14.1 |
HIP 41471 |
9.47 |
| 2026-06-10 00:00 |
08:27:32.15 |
+00:40:18.5 |
HIP 41471 |
9.39 |
| 2026-06-10 12:00 |
08:27:34.10 |
+00:40:22.7 |
HIP 41471 |
9.34 |
| 2026-06-11 00:00 |
08:27:36.08 |
+00:40:26.8 |
HIP 41516 |
9.09 |
| 2026-06-11 12:00 |
08:27:38.07 |
+00:40:30.7 |
HIP 41516 |
8.71 |
| 2026-06-12 00:00 |
08:27:40.09 |
+00:40:34.4 |
HIP 41516 |
8.34 |
| 2026-06-12 12:00 |
08:27:42.11 |
+00:40:38.0 |
HIP 41516 |
7.99 |
| 2026-06-13 00:00 |
08:27:44.16 |
+00:40:41.4 |
HIP 41516 |
7.66 |
| 2026-06-13 12:00 |
08:27:46.23 |
+00:40:44.7 |
HIP 41516 |
7.35 |
| 2026-06-14 00:00 |
08:27:48.31 |
+00:40:47.8 |
HIP 41516 |
7.06 |
| 2026-06-14 12:00 |
08:27:50.40 |
+00:40:50.7 |
HIP 41516 |
6.80 |
| 2026-06-15 00:00 |
08:27:52.52 |
+00:40:53.5 |
HIP 41516 |
6.58 |
| 2026-06-15 12:00 |
08:27:54.65 |
+00:40:56.1 |
HIP 41516 |
6.39 |
| 2026-06-16 00:00 |
08:27:56.80 |
+00:40:58.5 |
HIP 41516 |
6.25 |
| 2026-06-16 12:00 |
08:27:58.96 |
+00:41:00.8 |
HIP 41516 |
6.15 |
| 2026-06-17 00:00 |
08:28:01.14 |
+00:41:03.0 |
HIP 41516 |
6.10 |
| 2026-06-17 12:00 |
08:28:03.34 |
+00:41:05.0 |
HIP 41516 |
6.11 |
| 2026-06-18 00:00 |
08:28:05.55 |
+00:41:06.8 |
HIP 41516 |
6.17 |
| 2026-06-18 12:00 |
08:28:07.78 |
+00:41:08.4 |
HIP 41516 |
6.27 |
| 2026-06-19 00:00 |
08:28:10.02 |
+00:41:09.9 |
HIP 41516 |
6.43 |
| 2026-06-19 12:00 |
08:28:12.27 |
+00:41:11.3 |
HIP 41516 |
6.64 |
| 2026-06-20 00:00 |
08:28:14.55 |
+00:41:12.4 |
HIP 41516 |
6.89 |
| 2026-06-20 12:00 |
08:28:16.83 |
+00:41:13.5 |
HIP 41516 |
7.18 |
| 2026-06-21 00:00 |
08:28:19.13 |
+00:41:14.3 |
HIP 41516 |
7.51 |
| 2026-06-21 12:00 |
08:28:21.45 |
+00:41:15.0 |
HIP 41516 |
7.87 |
| 2026-06-22 00:00 |
08:28:23.78 |
+00:41:15.6 |
HIP 41516 |
8.26 |