| Parameter |
Value |
| Designation |
C/1936 K1 (Peltier) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
1936-07-08T23:00:20.085120Z |
| Orbit solution date (soln_date, UTC) |
2024-02-20T20:16:47Z |
| Obs used |
113 |
| NEO |
- |
| M1 |
6.600 |
| K1 |
18.000 |
| PC |
- |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
1936-07-04.0000000 |
| e |
0.99195459 |
| q (au) |
1.099880 |
| a (au) |
136.709018 |
| i (deg) |
78.547416 |
| Ω (om, deg) |
134.940673 |
| ω (w, deg) |
148.477869 |
| M (ma, deg) |
359.996943 |
Magnitude
Scatter + Global Linear
$$
M_a = (6.033 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
6.033 |
| 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
Ephemeris
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-09-20 00:00 |
07:54:26.08 |
-19:43:28.9 |
HIP 38606 |
3.73 |
| 2026-09-20 12:00 |
07:54:26.67 |
-19:43:39.8 |
HIP 38606 |
3.96 |
| 2026-09-21 00:00 |
07:54:27.24 |
-19:43:50.6 |
HIP 38606 |
4.18 |
| 2026-09-21 12:00 |
07:54:27.81 |
-19:44:01.5 |
HIP 38606 |
4.40 |
| 2026-09-22 00:00 |
07:54:28.37 |
-19:44:12.5 |
HIP 38606 |
4.63 |
| 2026-09-22 12:00 |
07:54:28.92 |
-19:44:23.4 |
HIP 38606 |
4.85 |
| 2026-09-23 00:00 |
07:54:29.46 |
-19:44:34.4 |
HIP 38606 |
5.07 |
| 2026-09-23 12:00 |
07:54:29.99 |
-19:44:45.4 |
HIP 38606 |
5.29 |
| 2026-09-24 00:00 |
07:54:30.51 |
-19:44:56.4 |
HIP 38606 |
5.51 |
| 2026-09-24 12:00 |
07:54:31.03 |
-19:45:07.5 |
HIP 38606 |
5.73 |
| 2026-09-25 00:00 |
07:54:31.53 |
-19:45:18.5 |
HIP 38606 |
5.94 |
| 2026-09-25 12:00 |
07:54:32.02 |
-19:45:29.6 |
HIP 38606 |
6.16 |
| 2026-09-26 00:00 |
07:54:32.51 |
-19:45:40.8 |
HIP 38606 |
6.37 |
| 2026-09-26 12:00 |
07:54:32.99 |
-19:45:51.9 |
HIP 38606 |
6.59 |
| 2026-09-27 00:00 |
07:54:33.45 |
-19:46:03.1 |
HIP 38606 |
6.80 |
| 2026-09-27 12:00 |
07:54:33.91 |
-19:46:14.2 |
HIP 38606 |
7.01 |
| 2026-09-28 00:00 |
07:54:34.36 |
-19:46:25.4 |
HIP 38606 |
7.22 |
| 2026-09-28 12:00 |
07:54:34.79 |
-19:46:36.6 |
HIP 38606 |
7.43 |
| 2026-09-29 00:00 |
07:54:35.22 |
-19:46:47.9 |
HIP 38606 |
7.64 |
| 2026-09-29 12:00 |
07:54:35.64 |
-19:46:59.1 |
HIP 38606 |
7.85 |
| 2026-09-30 00:00 |
07:54:36.05 |
-19:47:10.4 |
HIP 38606 |
8.06 |
| 2026-09-30 12:00 |
07:54:36.45 |
-19:47:21.7 |
HIP 38606 |
8.26 |
| 2026-10-01 00:00 |
07:54:36.84 |
-19:47:33.0 |
HIP 38606 |
8.47 |
| 2026-10-01 12:00 |
07:54:37.22 |
-19:47:44.3 |
HIP 38606 |
8.67 |
| 2026-10-02 00:00 |
07:54:37.59 |
-19:47:55.6 |
HIP 38606 |
8.88 |
| 2026-10-02 12:00 |
07:54:37.95 |
-19:48:06.9 |
HIP 38606 |
9.08 |
| 2026-10-03 00:00 |
07:54:38.31 |
-19:48:18.2 |
HIP 38606 |
9.28 |
| 2026-10-03 12:00 |
07:54:38.65 |
-19:48:29.6 |
HIP 38606 |
9.48 |
| 2026-10-04 00:00 |
07:54:38.98 |
-19:48:40.9 |
HIP 38606 |
9.68 |
| 2026-10-04 12:00 |
07:54:39.30 |
-19:48:52.3 |
HIP 38606 |
9.88 |
| 2026-10-05 00:00 |
07:54:39.61 |
-19:49:03.7 |
HIP 38606 |
10.07 |
| 2026-10-05 12:00 |
07:54:39.91 |
-19:49:15.0 |
HIP 38606 |
10.27 |
| 2026-10-06 00:00 |
07:54:40.20 |
-19:49:26.4 |
HIP 38606 |
10.46 |
| 2026-10-06 12:00 |
07:54:40.49 |
-19:49:37.8 |
HIP 38606 |
10.66 |
| 2026-10-07 00:00 |
07:54:40.76 |
-19:49:49.2 |
HIP 38606 |
10.85 |
| 2026-10-07 12:00 |
07:54:41.02 |
-19:50:00.6 |
HIP 38606 |
11.04 |
| 2026-10-08 00:00 |
07:54:41.27 |
-19:50:12.0 |
HIP 38606 |
11.23 |
| 2026-10-08 12:00 |
07:54:41.51 |
-19:50:23.4 |
HIP 38606 |
11.42 |
| 2026-10-09 00:00 |
07:54:41.74 |
-19:50:34.8 |
HIP 38606 |
11.61 |
| 2026-10-09 12:00 |
07:54:41.96 |
-19:50:46.2 |
HIP 38606 |
11.80 |
| 2026-10-10 00:00 |
07:54:42.17 |
-19:50:57.6 |
HIP 38606 |
11.99 |
| 2026-10-10 12:00 |
07:54:42.37 |
-19:51:09.0 |
HIP 38606 |
12.17 |
| 2026-10-11 00:00 |
07:54:42.56 |
-19:51:20.4 |
HIP 38606 |
12.36 |