| Parameter |
Value |
| Designation |
C/1937 N1 (Finsler) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
1937-08-15T15:55:13.992960Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:29:05Z |
| Obs used |
25 |
| NEO |
- |
| M1 |
6.300 |
| K1 |
13.250 |
| PC |
- |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
1937-07-27.0000000 |
| e |
1.00037846 |
| q (au) |
0.862748 |
| a (au) |
-2279.646632 |
| i (deg) |
146.413356 |
| Ω (om, deg) |
59.419869 |
| ω (w, deg) |
114.832464 |
| M (ma, deg) |
-0.000178 |
Magnitude
Scatter + Global Linear
$$
M_a = (5.747 + 2.504\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
5.747 |
| n |
2.504 |
| gf |
1.000 |
| gb |
-0.500 |
| k |
1.000 |
| δ90 |
1.000 |
| 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
Ephemeris
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-03-26 00:00 |
08:20:56.39 |
-14:03:08.4 |
HIP 40896 |
18.83 |
| 2026-03-26 12:00 |
08:20:55.87 |
-14:02:59.1 |
HIP 40896 |
18.97 |
| 2026-03-27 00:00 |
08:20:55.35 |
-14:02:49.7 |
HIP 40896 |
19.11 |
| 2026-03-27 12:00 |
08:20:54.84 |
-14:02:40.4 |
HIP 40896 |
19.25 |
| 2026-03-28 00:00 |
08:20:54.34 |
-14:02:31.0 |
HIP 40896 |
19.39 |
| 2026-03-28 12:00 |
08:20:53.85 |
-14:02:21.6 |
HIP 40896 |
19.53 |
| 2026-03-29 00:00 |
08:20:53.36 |
-14:02:12.2 |
HIP 40896 |
19.68 |
| 2026-03-29 12:00 |
08:20:52.89 |
-14:02:02.8 |
HIP 40896 |
19.82 |
| 2026-03-30 00:00 |
08:20:52.42 |
-14:01:53.4 |
HIP 40896 |
19.97 |
| 2026-03-30 12:00 |
08:20:51.96 |
-14:01:44.0 |
HIP 40896 |
20.12 |
| 2026-03-31 00:00 |
08:20:51.51 |
-14:01:34.5 |
HIP 40896 |
20.27 |
| 2026-03-31 12:00 |
08:20:51.07 |
-14:01:25.1 |
HIP 40896 |
20.42 |
| 2026-04-01 00:00 |
08:20:50.64 |
-14:01:15.7 |
HIP 40896 |
20.57 |
| 2026-04-01 12:00 |
08:20:50.22 |
-14:01:06.3 |
HIP 40896 |
20.72 |
| 2026-04-02 00:00 |
08:20:49.80 |
-14:00:56.8 |
HIP 40896 |
20.87 |
| 2026-04-02 12:00 |
08:20:49.39 |
-14:00:47.4 |
HIP 40896 |
21.02 |
| 2026-04-03 00:00 |
08:20:49.00 |
-14:00:38.0 |
HIP 40896 |
21.17 |
| 2026-04-03 12:00 |
08:20:48.61 |
-14:00:28.5 |
HIP 40896 |
21.33 |
| 2026-04-04 00:00 |
08:20:48.23 |
-14:00:19.1 |
HIP 40896 |
21.48 |
| 2026-04-04 12:00 |
08:20:47.85 |
-14:00:09.7 |
HIP 40896 |
21.64 |
| 2026-04-05 00:00 |
08:20:47.49 |
-14:00:00.2 |
HIP 40896 |
21.79 |
| 2026-04-05 12:00 |
08:20:47.14 |
-13:59:50.8 |
HIP 40896 |
21.95 |
| 2026-04-06 00:00 |
08:20:46.79 |
-13:59:41.4 |
HIP 40885 |
21.87 |
| 2026-04-06 12:00 |
08:20:46.45 |
-13:59:32.0 |
HIP 40885 |
21.71 |
| 2026-04-07 00:00 |
08:20:46.13 |
-13:59:22.5 |
HIP 40885 |
21.54 |
| 2026-04-07 12:00 |
08:20:45.81 |
-13:59:13.1 |
HIP 40885 |
21.38 |
| 2026-04-08 00:00 |
08:20:45.50 |
-13:59:03.7 |
HIP 40885 |
21.21 |
| 2026-04-08 12:00 |
08:20:45.19 |
-13:58:54.3 |
HIP 40885 |
21.05 |
| 2026-04-09 00:00 |
08:20:44.90 |
-13:58:44.9 |
HIP 40885 |
20.88 |
| 2026-04-09 12:00 |
08:20:44.62 |
-13:58:35.6 |
HIP 40885 |
20.72 |
| 2026-04-10 00:00 |
08:20:44.34 |
-13:58:26.2 |
HIP 40885 |
20.56 |
| 2026-04-10 12:00 |
08:20:44.08 |
-13:58:16.8 |
HIP 40885 |
20.39 |
| 2026-04-11 00:00 |
08:20:43.82 |
-13:58:07.5 |
HIP 40885 |
20.23 |
| 2026-04-11 12:00 |
08:20:43.57 |
-13:57:58.1 |
HIP 40885 |
20.07 |
| 2026-04-12 00:00 |
08:20:43.34 |
-13:57:48.8 |
HIP 40885 |
19.91 |
| 2026-04-12 12:00 |
08:20:43.11 |
-13:57:39.4 |
HIP 40885 |
19.75 |
| 2026-04-13 00:00 |
08:20:42.88 |
-13:57:30.1 |
HIP 40885 |
19.59 |
| 2026-04-13 12:00 |
08:20:42.67 |
-13:57:20.8 |
HIP 40885 |
19.43 |
| 2026-04-14 00:00 |
08:20:42.47 |
-13:57:11.6 |
HIP 40885 |
19.27 |
| 2026-04-14 12:00 |
08:20:42.28 |
-13:57:02.3 |
HIP 40885 |
19.11 |
| 2026-04-15 00:00 |
08:20:42.09 |
-13:56:53.0 |
HIP 40885 |
18.96 |
| 2026-04-15 12:00 |
08:20:41.92 |
-13:56:43.8 |
HIP 40885 |
18.80 |
| 2026-04-16 00:00 |
08:20:41.75 |
-13:56:34.6 |
HIP 40885 |
18.64 |