| Parameter |
Value |
| Designation |
C/1932 P1 (Peltier-Whipple) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
1932-09-01T20:28:52.584960Z |
| Orbit solution date (soln_date, UTC) |
2023-12-04T20:32:29Z |
| Obs used |
56 |
| NEO |
- |
| M1 |
8.100 |
| K1 |
38.250 |
| PC |
- |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
1932-08-31.0000000 |
| e |
0.97689337 |
| q (au) |
1.037233 |
| a (au) |
44.888968 |
| i (deg) |
71.723285 |
| Ω (om, deg) |
345.466351 |
| ω (w, deg) |
38.467110 |
| M (ma, deg) |
359.993926 |
Magnitude
Scatter + Global Linear
$$
M_a = (7.490 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
7.490 |
| n |
6.000 |
| gf |
1.000 |
| gb |
-0.500 |
| 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) |
| 2026-03-26 00:00 |
10:53:58.33 |
-29:01:25.3 |
HIP 53161 |
34.73 |
| 2026-03-26 12:00 |
10:53:56.87 |
-29:01:14.4 |
HIP 53161 |
34.71 |
| 2026-03-27 00:00 |
10:53:55.42 |
-29:01:03.4 |
HIP 53161 |
34.70 |
| 2026-03-27 12:00 |
10:53:53.98 |
-29:00:52.3 |
HIP 53161 |
34.70 |
| 2026-03-28 00:00 |
10:53:52.54 |
-29:00:41.1 |
HIP 53161 |
34.70 |
| 2026-03-28 12:00 |
10:53:51.10 |
-29:00:29.8 |
HIP 53161 |
34.71 |
| 2026-03-29 00:00 |
10:53:49.68 |
-29:00:18.5 |
HIP 53161 |
34.73 |
| 2026-03-29 12:00 |
10:53:48.25 |
-29:00:07.1 |
HIP 53161 |
34.74 |
| 2026-03-30 00:00 |
10:53:46.84 |
-28:59:55.6 |
HIP 53161 |
34.77 |
| 2026-03-30 12:00 |
10:53:45.43 |
-28:59:44.1 |
HIP 53161 |
34.80 |
| 2026-03-31 00:00 |
10:53:44.03 |
-28:59:32.4 |
HIP 53161 |
34.84 |
| 2026-03-31 12:00 |
10:53:42.63 |
-28:59:20.7 |
HIP 53161 |
34.88 |
| 2026-04-01 00:00 |
10:53:41.24 |
-28:59:09.0 |
HIP 53161 |
34.92 |
| 2026-04-01 12:00 |
10:53:39.86 |
-28:58:57.1 |
HIP 53161 |
34.98 |
| 2026-04-02 00:00 |
10:53:38.48 |
-28:58:45.2 |
HIP 53161 |
35.03 |
| 2026-04-02 12:00 |
10:53:37.11 |
-28:58:33.3 |
HIP 53161 |
35.10 |
| 2026-04-03 00:00 |
10:53:35.75 |
-28:58:21.2 |
HIP 53161 |
35.16 |
| 2026-04-03 12:00 |
10:53:34.39 |
-28:58:09.1 |
HIP 53161 |
35.24 |
| 2026-04-04 00:00 |
10:53:33.04 |
-28:57:56.9 |
HIP 53161 |
35.31 |
| 2026-04-04 12:00 |
10:53:31.70 |
-28:57:44.7 |
HIP 53161 |
35.40 |
| 2026-04-05 00:00 |
10:53:30.37 |
-28:57:32.4 |
HIP 53221 |
35.19 |
| 2026-04-05 12:00 |
10:53:29.04 |
-28:57:20.0 |
HIP 53221 |
34.95 |
| 2026-04-06 00:00 |
10:53:27.72 |
-28:57:07.6 |
HIP 53221 |
34.71 |
| 2026-04-06 12:00 |
10:53:26.41 |
-28:56:55.1 |
HIP 53221 |
34.47 |
| 2026-04-07 00:00 |
10:53:25.11 |
-28:56:42.6 |
HIP 53221 |
34.24 |
| 2026-04-07 12:00 |
10:53:23.81 |
-28:56:30.0 |
HIP 53221 |
34.00 |
| 2026-04-08 00:00 |
10:53:22.52 |
-28:56:17.3 |
HIP 53221 |
33.76 |
| 2026-04-08 12:00 |
10:53:21.24 |
-28:56:04.6 |
HIP 53221 |
33.53 |
| 2026-04-09 00:00 |
10:53:19.97 |
-28:55:51.8 |
HIP 53221 |
33.30 |
| 2026-04-09 12:00 |
10:53:18.71 |
-28:55:39.0 |
HIP 53221 |
33.07 |
| 2026-04-10 00:00 |
10:53:17.45 |
-28:55:26.1 |
HIP 53221 |
32.84 |
| 2026-04-10 12:00 |
10:53:16.21 |
-28:55:13.2 |
HIP 53221 |
32.61 |
| 2026-04-11 00:00 |
10:53:14.97 |
-28:55:00.2 |
HIP 53221 |
32.38 |
| 2026-04-11 12:00 |
10:53:13.74 |
-28:54:47.1 |
HIP 53221 |
32.15 |
| 2026-04-12 00:00 |
10:53:12.52 |
-28:54:34.0 |
HIP 53221 |
31.93 |
| 2026-04-12 12:00 |
10:53:11.30 |
-28:54:20.9 |
HIP 53221 |
31.71 |
| 2026-04-13 00:00 |
10:53:10.10 |
-28:54:07.7 |
HIP 53221 |
31.48 |
| 2026-04-13 12:00 |
10:53:08.90 |
-28:53:54.5 |
HIP 53221 |
31.26 |
| 2026-04-14 00:00 |
10:53:07.72 |
-28:53:41.2 |
HIP 53221 |
31.04 |
| 2026-04-14 12:00 |
10:53:06.54 |
-28:53:27.9 |
HIP 53221 |
30.83 |
| 2026-04-15 00:00 |
10:53:05.37 |
-28:53:14.5 |
HIP 53221 |
30.61 |
| 2026-04-15 12:00 |
10:53:04.22 |
-28:53:01.1 |
HIP 53221 |
30.39 |
| 2026-04-16 00:00 |
10:53:03.07 |
-28:52:47.7 |
HIP 53221 |
30.18 |