C/1999 N2 (Lynn)
| Parameter |
Value |
| Designation |
C/1999 N2 (Lynn) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
1999-07-23T01:12:49.584960Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:30:01Z |
| Obs used |
203 |
| NEO |
- |
| M1 |
10.200 |
| K1 |
7.000 |
| PC |
0.030 |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
1999-08-07.0000000 |
| e |
0.99743788 |
| q (au) |
0.761284 |
| a (au) |
297.130861 |
| i (deg) |
111.655898 |
| Ω (om, deg) |
254.675893 |
| ω (w, deg) |
357.834196 |
| M (ma, deg) |
0.002877 |
Magnitude
Scatter + Global Linear
$$
M_a = (9.119 + 3.568\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
9.119 |
| n |
3.568 |
| gf |
0.800 |
| gb |
-0.711 |
| k |
0.800 |
| δ90 |
1.362 |
| 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
Ephemeris
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-02-03 00:00 |
05:09:02.70 |
+37:52:52.0 |
HIP 24013 |
14.29 |
| 2026-02-03 12:00 |
05:09:00.88 |
+37:52:41.2 |
HIP 24013 |
14.35 |
| 2026-02-04 00:00 |
05:08:59.08 |
+37:52:30.4 |
HIP 24013 |
14.41 |
| 2026-02-04 12:00 |
05:08:57.30 |
+37:52:19.6 |
HIP 24013 |
14.48 |
| 2026-02-05 00:00 |
05:08:55.55 |
+37:52:08.8 |
HIP 24013 |
14.56 |
| 2026-02-05 12:00 |
05:08:53.82 |
+37:51:57.9 |
HIP 24013 |
14.65 |
| 2026-02-06 00:00 |
05:08:52.12 |
+37:51:47.1 |
HIP 24013 |
14.74 |
| 2026-02-06 12:00 |
05:08:50.44 |
+37:51:36.2 |
HIP 24013 |
14.83 |
| 2026-02-07 00:00 |
05:08:48.79 |
+37:51:25.3 |
HIP 24013 |
14.94 |
| 2026-02-07 12:00 |
05:08:47.16 |
+37:51:14.4 |
HIP 24013 |
15.04 |
| 2026-02-08 00:00 |
05:08:45.55 |
+37:51:03.4 |
HIP 24013 |
15.16 |
| 2026-02-08 12:00 |
05:08:43.97 |
+37:50:52.5 |
HIP 24013 |
15.27 |
| 2026-02-09 00:00 |
05:08:42.41 |
+37:50:41.5 |
HIP 24013 |
15.39 |
| 2026-02-09 12:00 |
05:08:40.88 |
+37:50:30.5 |
HIP 24013 |
15.51 |
| 2026-02-10 00:00 |
05:08:39.37 |
+37:50:19.6 |
HIP 24013 |
15.64 |
| 2026-02-10 12:00 |
05:08:37.89 |
+37:50:08.6 |
HIP 24013 |
15.77 |
| 2026-02-11 00:00 |
05:08:36.44 |
+37:49:57.5 |
HIP 24013 |
15.90 |
| 2026-02-11 12:00 |
05:08:35.01 |
+37:49:46.5 |
HIP 24013 |
16.03 |
| 2026-02-12 00:00 |
05:08:33.60 |
+37:49:35.5 |
HIP 24013 |
16.16 |
| 2026-02-12 12:00 |
05:08:32.22 |
+37:49:24.5 |
HIP 24013 |
16.30 |
| 2026-02-13 00:00 |
05:08:30.87 |
+37:49:13.4 |
HIP 24013 |
16.44 |
| 2026-02-13 12:00 |
05:08:29.54 |
+37:49:02.4 |
HIP 24013 |
16.57 |
| 2026-02-14 00:00 |
05:08:28.24 |
+37:48:51.3 |
HIP 24013 |
16.71 |
| 2026-02-14 12:00 |
05:08:26.96 |
+37:48:40.3 |
HIP 24013 |
16.85 |
| 2026-02-15 00:00 |
05:08:25.71 |
+37:48:29.2 |
HIP 24013 |
16.99 |
| 2026-02-15 12:00 |
05:08:24.49 |
+37:48:18.1 |
HIP 24013 |
17.12 |
| 2026-02-16 00:00 |
05:08:23.29 |
+37:48:07.1 |
HIP 24013 |
17.26 |
| 2026-02-16 12:00 |
05:08:22.12 |
+37:47:56.0 |
HIP 24013 |
17.40 |
| 2026-02-17 00:00 |
05:08:20.97 |
+37:47:44.9 |
HIP 24013 |
17.53 |
| 2026-02-17 12:00 |
05:08:19.86 |
+37:47:33.9 |
HIP 24013 |
17.67 |
| 2026-02-18 00:00 |
05:08:18.76 |
+37:47:22.8 |
HIP 24013 |
17.80 |
| 2026-02-18 12:00 |
05:08:17.70 |
+37:47:11.7 |
HIP 24013 |
17.93 |
| 2026-02-19 00:00 |
05:08:16.66 |
+37:47:00.7 |
HIP 24013 |
18.07 |
| 2026-02-19 12:00 |
05:08:15.65 |
+37:46:49.6 |
HIP 24013 |
18.19 |
| 2026-02-20 00:00 |
05:08:14.66 |
+37:46:38.6 |
HIP 24013 |
18.32 |
| 2026-02-20 12:00 |
05:08:13.70 |
+37:46:27.5 |
HIP 24013 |
18.45 |
| 2026-02-21 00:00 |
05:08:12.77 |
+37:46:16.5 |
HIP 24013 |
18.57 |
| 2026-02-21 12:00 |
05:08:11.86 |
+37:46:05.5 |
HIP 24013 |
18.69 |
| 2026-02-22 00:00 |
05:08:10.99 |
+37:45:54.5 |
HIP 24013 |
18.81 |
| 2026-02-22 12:00 |
05:08:10.14 |
+37:45:43.5 |
HIP 24013 |
18.92 |
| 2026-02-23 00:00 |
05:08:09.31 |
+37:45:32.5 |
HIP 24013 |
19.04 |
| 2026-02-23 12:00 |
05:08:08.51 |
+37:45:21.5 |
HIP 24013 |
19.15 |
| 2026-02-24 00:00 |
05:08:07.74 |
+37:45:10.5 |
HIP 24013 |
19.26 |