| Parameter |
Value |
| Designation |
C/2001 N2 (LINEAR) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2002-08-19T15:57:25.813440Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:30:10Z |
| Obs used |
884 |
| NEO |
- |
| M1 |
11.600 |
| K1 |
4.500 |
| PC |
- |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
2002-03-18.0000000 |
| e |
1.00105829 |
| q (au) |
2.668513 |
| a (au) |
-2521.533796 |
| i (deg) |
138.543532 |
| Ω (om, deg) |
52.803642 |
| ω (w, deg) |
151.896075 |
| M (ma, deg) |
-0.001204 |
Magnitude
Scatter + Global Linear
$$
M_a = (10.423 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
10.423 |
| n |
2.000 |
| 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 |
| 2001-07-11 |
2002-03-19 |
+6.0608 |
-3.799 |
| 2002-03-19 |
2002-08-17 |
-14.8317 |
+6.318 |
| 2002-08-19 |
2003-06-08 |
+6.3253 |
-2.392 |
log10 r = log10(heliocentric distance / AU), Δ = geocentric distance (AU)
Ephemeris
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-07-29 00:00 |
06:40:55.37 |
-09:47:45.3 |
HIP 32078 |
18.24 |
| 2026-07-29 12:00 |
06:40:57.58 |
-09:47:55.9 |
HIP 32078 |
17.66 |
| 2026-07-30 00:00 |
06:40:59.79 |
-09:48:06.6 |
HIP 32078 |
17.09 |
| 2026-07-30 12:00 |
06:41:01.99 |
-09:48:17.5 |
HIP 32078 |
16.52 |
| 2026-07-31 00:00 |
06:41:04.17 |
-09:48:28.6 |
HIP 32078 |
15.95 |
| 2026-07-31 12:00 |
06:41:06.35 |
-09:48:39.8 |
HIP 32078 |
15.38 |
| 2026-08-01 00:00 |
06:41:08.51 |
-09:48:51.1 |
HIP 32078 |
14.82 |
| 2026-08-01 12:00 |
06:41:10.67 |
-09:49:02.6 |
HIP 32078 |
14.26 |
| 2026-08-02 00:00 |
06:41:12.82 |
-09:49:14.2 |
HIP 32078 |
13.70 |
| 2026-08-02 12:00 |
06:41:14.95 |
-09:49:26.0 |
HIP 32078 |
13.14 |
| 2026-08-03 00:00 |
06:41:17.07 |
-09:49:37.9 |
HIP 32078 |
12.58 |
| 2026-08-03 12:00 |
06:41:19.18 |
-09:49:50.0 |
HIP 32078 |
12.03 |
| 2026-08-04 00:00 |
06:41:21.29 |
-09:50:02.2 |
HIP 32078 |
11.48 |
| 2026-08-04 12:00 |
06:41:23.37 |
-09:50:14.6 |
HIP 32078 |
10.93 |
| 2026-08-05 00:00 |
06:41:25.45 |
-09:50:27.0 |
HIP 32078 |
10.38 |
| 2026-08-05 12:00 |
06:41:27.52 |
-09:50:39.7 |
HIP 32078 |
9.84 |
| 2026-08-06 00:00 |
06:41:29.57 |
-09:50:52.5 |
HIP 32078 |
9.30 |
| 2026-08-06 12:00 |
06:41:31.61 |
-09:51:05.4 |
HIP 32078 |
8.76 |
| 2026-08-07 00:00 |
06:41:33.64 |
-09:51:18.4 |
HIP 32078 |
8.23 |
| 2026-08-07 12:00 |
06:41:35.66 |
-09:51:31.6 |
HIP 32078 |
7.70 |
| 2026-08-08 00:00 |
06:41:37.67 |
-09:51:45.0 |
HIP 32078 |
7.18 |
| 2026-08-08 12:00 |
06:41:39.66 |
-09:51:58.4 |
HIP 32078 |
6.67 |
| 2026-08-09 00:00 |
06:41:41.64 |
-09:52:12.0 |
HIP 32078 |
6.16 |
| 2026-08-09 12:00 |
06:41:43.61 |
-09:52:25.8 |
HIP 32078 |
5.65 |
| 2026-08-10 00:00 |
06:41:45.56 |
-09:52:39.6 |
HIP 32078 |
5.16 |
| 2026-08-10 12:00 |
06:41:47.50 |
-09:52:53.6 |
HIP 32078 |
4.68 |
| 2026-08-11 00:00 |
06:41:49.43 |
-09:53:07.8 |
HIP 32078 |
4.22 |
| 2026-08-11 12:00 |
06:41:51.34 |
-09:53:22.0 |
HIP 32078 |
3.78 |
| 2026-08-12 00:00 |
06:41:53.24 |
-09:53:36.4 |
HIP 32078 |
3.37 |
| 2026-08-12 12:00 |
06:41:55.13 |
-09:53:51.0 |
HIP 32078 |
3.00 |
| 2026-08-13 00:00 |
06:41:57.00 |
-09:54:05.6 |
HIP 32078 |
2.68 |
| 2026-08-13 12:00 |
06:41:58.85 |
-09:54:20.4 |
HIP 32078 |
2.44 |
| 2026-08-14 00:00 |
06:42:00.70 |
-09:54:35.3 |
HIP 32078 |
2.30 |
| 2026-08-14 12:00 |
06:42:02.52 |
-09:54:50.3 |
HIP 32078 |
2.27 |
| 2026-08-15 00:00 |
06:42:04.34 |
-09:55:05.5 |
HIP 32078 |
2.36 |
| 2026-08-15 12:00 |
06:42:06.14 |
-09:55:20.7 |
HIP 32078 |
2.56 |
| 2026-08-16 00:00 |
06:42:07.92 |
-09:55:36.1 |
HIP 32078 |
2.83 |
| 2026-08-16 12:00 |
06:42:09.69 |
-09:55:51.6 |
HIP 32078 |
3.17 |
| 2026-08-17 00:00 |
06:42:11.44 |
-09:56:07.3 |
HIP 32078 |
3.54 |
| 2026-08-17 12:00 |
06:42:13.18 |
-09:56:23.0 |
HIP 32078 |
3.95 |
| 2026-08-18 00:00 |
06:42:14.90 |
-09:56:38.9 |
HIP 32078 |
4.37 |
| 2026-08-18 12:00 |
06:42:16.61 |
-09:56:54.8 |
HIP 32078 |
4.81 |
| 2026-08-19 00:00 |
06:42:18.30 |
-09:57:10.9 |
HIP 32078 |
5.26 |