| 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) |
| 2026-05-12 00:00 |
06:34:57.89 |
-09:54:43.3 |
HIP 31571 |
22.67 |
| 2026-05-12 12:00 |
06:34:59.57 |
-09:54:27.7 |
HIP 31571 |
22.21 |
| 2026-05-13 00:00 |
06:35:01.28 |
-09:54:12.3 |
HIP 31571 |
21.74 |
| 2026-05-13 12:00 |
06:35:03.00 |
-09:53:57.0 |
HIP 31571 |
21.28 |
| 2026-05-14 00:00 |
06:35:04.73 |
-09:53:41.8 |
HIP 31571 |
20.81 |
| 2026-05-14 12:00 |
06:35:06.48 |
-09:53:26.8 |
HIP 31571 |
20.34 |
| 2026-05-15 00:00 |
06:35:08.25 |
-09:53:11.9 |
HIP 31571 |
19.86 |
| 2026-05-15 12:00 |
06:35:10.03 |
-09:52:57.2 |
HIP 31571 |
19.39 |
| 2026-05-16 00:00 |
06:35:11.83 |
-09:52:42.6 |
HIP 31571 |
18.91 |
| 2026-05-16 12:00 |
06:35:13.64 |
-09:52:28.2 |
HIP 31571 |
18.44 |
| 2026-05-17 00:00 |
06:35:15.47 |
-09:52:13.9 |
HIP 31571 |
17.96 |
| 2026-05-17 12:00 |
06:35:17.31 |
-09:51:59.8 |
HIP 31571 |
17.48 |
| 2026-05-18 00:00 |
06:35:19.16 |
-09:51:45.8 |
HIP 31571 |
16.99 |
| 2026-05-18 12:00 |
06:35:21.03 |
-09:51:32.0 |
HIP 31571 |
16.51 |
| 2026-05-19 00:00 |
06:35:22.92 |
-09:51:18.3 |
HIP 31571 |
16.02 |
| 2026-05-19 12:00 |
06:35:24.82 |
-09:51:04.8 |
HIP 31571 |
15.54 |
| 2026-05-20 00:00 |
06:35:26.73 |
-09:50:51.4 |
HIP 31571 |
15.05 |
| 2026-05-20 12:00 |
06:35:28.66 |
-09:50:38.2 |
HIP 31571 |
14.56 |
| 2026-05-21 00:00 |
06:35:30.60 |
-09:50:25.2 |
HIP 31571 |
14.07 |
| 2026-05-21 12:00 |
06:35:32.55 |
-09:50:12.3 |
HIP 31571 |
13.58 |
| 2026-05-22 00:00 |
06:35:34.52 |
-09:49:59.6 |
HIP 31571 |
13.09 |
| 2026-05-22 12:00 |
06:35:36.50 |
-09:49:47.0 |
HIP 31571 |
12.60 |
| 2026-05-23 00:00 |
06:35:38.49 |
-09:49:34.6 |
HIP 31571 |
12.11 |
| 2026-05-23 12:00 |
06:35:40.50 |
-09:49:22.4 |
HIP 31571 |
11.62 |
| 2026-05-24 00:00 |
06:35:42.51 |
-09:49:10.3 |
HIP 31571 |
11.13 |
| 2026-05-24 12:00 |
06:35:44.54 |
-09:48:58.3 |
HIP 31571 |
10.64 |
| 2026-05-25 00:00 |
06:35:46.59 |
-09:48:46.6 |
HIP 31571 |
10.16 |
| 2026-05-25 12:00 |
06:35:48.64 |
-09:48:35.0 |
HIP 31571 |
9.68 |
| 2026-05-26 00:00 |
06:35:50.71 |
-09:48:23.5 |
HIP 31571 |
9.20 |
| 2026-05-26 12:00 |
06:35:52.79 |
-09:48:12.2 |
HIP 31571 |
8.72 |
| 2026-05-27 00:00 |
06:35:54.88 |
-09:48:01.1 |
HIP 31571 |
8.25 |
| 2026-05-27 12:00 |
06:35:56.98 |
-09:47:50.2 |
HIP 31571 |
7.79 |
| 2026-05-28 00:00 |
06:35:59.09 |
-09:47:39.4 |
HIP 31571 |
7.33 |
| 2026-05-28 12:00 |
06:36:01.22 |
-09:47:28.7 |
HIP 31571 |
6.88 |
| 2026-05-29 00:00 |
06:36:03.35 |
-09:47:18.3 |
HIP 31571 |
6.45 |
| 2026-05-29 12:00 |
06:36:05.50 |
-09:47:08.0 |
HIP 31571 |
6.04 |
| 2026-05-30 00:00 |
06:36:07.66 |
-09:46:57.9 |
HIP 31571 |
5.64 |
| 2026-05-30 12:00 |
06:36:09.82 |
-09:46:47.9 |
HIP 31571 |
5.27 |
| 2026-05-31 00:00 |
06:36:12.00 |
-09:46:38.1 |
HIP 31571 |
4.93 |
| 2026-05-31 12:00 |
06:36:14.19 |
-09:46:28.5 |
HIP 31571 |
4.64 |
| 2026-06-01 00:00 |
06:36:16.39 |
-09:46:19.0 |
HIP 31571 |
4.39 |
| 2026-06-01 12:00 |
06:36:18.60 |
-09:46:09.7 |
HIP 31571 |
4.20 |
| 2026-06-02 00:00 |
06:36:20.81 |
-09:46:00.6 |
HIP 31571 |
4.07 |