C/1932 P1 (Peltier-Whipple)
| 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) |
| 2026-02-03 00:00 |
10:56:34.23 |
-29:10:42.9 |
HIP 53561 |
12.47 |
| 2026-02-03 12:00 |
10:56:32.84 |
-29:10:43.7 |
HIP 53561 |
12.73 |
| 2026-02-04 00:00 |
10:56:31.45 |
-29:10:44.3 |
HIP 53561 |
12.99 |
| 2026-02-04 12:00 |
10:56:30.05 |
-29:10:44.8 |
HIP 53561 |
13.26 |
| 2026-02-05 00:00 |
10:56:28.64 |
-29:10:45.1 |
HIP 53561 |
13.53 |
| 2026-02-05 12:00 |
10:56:27.23 |
-29:10:45.4 |
HIP 53561 |
13.80 |
| 2026-02-06 00:00 |
10:56:25.81 |
-29:10:45.4 |
HIP 53561 |
14.08 |
| 2026-02-06 12:00 |
10:56:24.38 |
-29:10:45.4 |
HIP 53561 |
14.36 |
| 2026-02-07 00:00 |
10:56:22.95 |
-29:10:45.2 |
HIP 53561 |
14.65 |
| 2026-02-07 12:00 |
10:56:21.51 |
-29:10:45.0 |
HIP 53561 |
14.94 |
| 2026-02-08 00:00 |
10:56:20.06 |
-29:10:44.5 |
HIP 53561 |
15.23 |
| 2026-02-08 12:00 |
10:56:18.61 |
-29:10:44.0 |
HIP 53561 |
15.52 |
| 2026-02-09 00:00 |
10:56:17.16 |
-29:10:43.3 |
HIP 53561 |
15.82 |
| 2026-02-09 12:00 |
10:56:15.69 |
-29:10:42.5 |
HIP 53561 |
16.12 |
| 2026-02-10 00:00 |
10:56:14.23 |
-29:10:41.5 |
HIP 53561 |
16.42 |
| 2026-02-10 12:00 |
10:56:12.75 |
-29:10:40.4 |
HIP 53561 |
16.72 |
| 2026-02-11 00:00 |
10:56:11.28 |
-29:10:39.2 |
HIP 53561 |
17.03 |
| 2026-02-11 12:00 |
10:56:09.79 |
-29:10:37.9 |
HIP 53561 |
17.34 |
| 2026-02-12 00:00 |
10:56:08.31 |
-29:10:36.4 |
HIP 53561 |
17.65 |
| 2026-02-12 12:00 |
10:56:06.81 |
-29:10:34.8 |
HIP 53561 |
17.97 |
| 2026-02-13 00:00 |
10:56:05.32 |
-29:10:33.1 |
HIP 53561 |
18.29 |
| 2026-02-13 12:00 |
10:56:03.81 |
-29:10:31.2 |
HIP 53561 |
18.60 |
| 2026-02-14 00:00 |
10:56:02.31 |
-29:10:29.2 |
HIP 53561 |
18.92 |
| 2026-02-14 12:00 |
10:56:00.80 |
-29:10:27.1 |
HIP 53561 |
19.25 |
| 2026-02-15 00:00 |
10:55:59.28 |
-29:10:24.8 |
HIP 53561 |
19.57 |
| 2026-02-15 12:00 |
10:55:57.76 |
-29:10:22.4 |
HIP 53561 |
19.90 |
| 2026-02-16 00:00 |
10:55:56.24 |
-29:10:19.9 |
HIP 53561 |
20.23 |
| 2026-02-16 12:00 |
10:55:54.71 |
-29:10:17.3 |
HIP 53561 |
20.56 |
| 2026-02-17 00:00 |
10:55:53.18 |
-29:10:14.5 |
HIP 53561 |
20.89 |
| 2026-02-17 12:00 |
10:55:51.64 |
-29:10:11.6 |
HIP 53561 |
21.22 |
| 2026-02-18 00:00 |
10:55:50.11 |
-29:10:08.6 |
HIP 53561 |
21.55 |
| 2026-02-18 12:00 |
10:55:48.57 |
-29:10:05.4 |
HIP 53561 |
21.89 |
| 2026-02-19 00:00 |
10:55:47.02 |
-29:10:02.2 |
HIP 53561 |
22.23 |
| 2026-02-19 12:00 |
10:55:45.47 |
-29:09:58.7 |
HIP 53561 |
22.57 |
| 2026-02-20 00:00 |
10:55:43.92 |
-29:09:55.2 |
HIP 53561 |
22.91 |
| 2026-02-20 12:00 |
10:55:42.37 |
-29:09:51.5 |
HIP 53561 |
23.25 |
| 2026-02-21 00:00 |
10:55:40.81 |
-29:09:47.8 |
HIP 53561 |
23.59 |
| 2026-02-21 12:00 |
10:55:39.25 |
-29:09:43.8 |
HIP 53561 |
23.94 |
| 2026-02-22 00:00 |
10:55:37.69 |
-29:09:39.8 |
HIP 53561 |
24.28 |
| 2026-02-22 12:00 |
10:55:36.13 |
-29:09:35.6 |
HIP 53561 |
24.63 |
| 2026-02-23 00:00 |
10:55:34.56 |
-29:09:31.3 |
HIP 53561 |
24.98 |
| 2026-02-23 12:00 |
10:55:32.99 |
-29:09:26.9 |
HIP 53561 |
25.33 |
| 2026-02-24 00:00 |
10:55:31.42 |
-29:09:22.4 |
HIP 53561 |
25.68 |