| Parameter |
Value |
| Designation |
C/1960 Y1 (Candy) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
1961-02-10T23:12:09.239040Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:29:14Z |
| Obs used |
8 |
| NEO |
Yes |
| M1 |
- |
| K1 |
- |
| PC |
0.030 |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
1961-01-09.0000000 |
| e |
0.93033662 |
| q (au) |
1.046719 |
| a (au) |
15.025379 |
| i (deg) |
151.174695 |
| Ω (om, deg) |
177.293253 |
| ω (w, deg) |
138.764838 |
| M (ma, deg) |
359.442118 |
Magnitude
Scatter + Global Linear
$$
M_a = (7.452 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
7.452 |
| n |
6.000 |
| gf |
1.000 |
| gb |
-0.546 |
| k |
0.800 |
| 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 |
15:09:08.03 |
-44:33:37.1 |
HIP 74104 |
6.43 |
| 2026-03-26 12:00 |
15:09:00.17 |
-44:33:48.4 |
HIP 74104 |
5.69 |
| 2026-03-27 00:00 |
15:08:52.25 |
-44:33:59.2 |
HIP 74104 |
5.21 |
| 2026-03-27 12:00 |
15:08:44.26 |
-44:34:09.5 |
HIP 74104 |
5.10 |
| 2026-03-28 00:00 |
15:08:36.22 |
-44:34:19.3 |
HIP 74104 |
5.37 |
| 2026-03-28 12:00 |
15:08:28.10 |
-44:34:28.6 |
HIP 74104 |
5.99 |
| 2026-03-29 00:00 |
15:08:19.93 |
-44:34:37.4 |
HIP 74104 |
6.86 |
| 2026-03-29 12:00 |
15:08:11.70 |
-44:34:45.7 |
HIP 74104 |
7.91 |
| 2026-03-30 00:00 |
15:08:03.40 |
-44:34:53.5 |
HIP 74104 |
9.08 |
| 2026-03-30 12:00 |
15:07:55.04 |
-44:35:00.8 |
HIP 74104 |
10.34 |
| 2026-03-31 00:00 |
15:07:46.63 |
-44:35:07.5 |
HIP 74104 |
11.66 |
| 2026-03-31 12:00 |
15:07:38.15 |
-44:35:13.8 |
HIP 74104 |
13.02 |
| 2026-04-01 00:00 |
15:07:29.62 |
-44:35:19.5 |
HIP 74104 |
14.42 |
| 2026-04-01 12:00 |
15:07:21.03 |
-44:35:24.7 |
HIP 74043 |
15.29 |
| 2026-04-02 00:00 |
15:07:12.38 |
-44:35:29.4 |
HIP 74043 |
15.90 |
| 2026-04-02 12:00 |
15:07:03.67 |
-44:35:33.5 |
HIP 74043 |
16.64 |
| 2026-04-03 00:00 |
15:06:54.91 |
-44:35:37.1 |
HIP 74043 |
17.50 |
| 2026-04-03 12:00 |
15:06:46.10 |
-44:35:40.3 |
HIP 74043 |
18.46 |
| 2026-04-04 00:00 |
15:06:37.23 |
-44:35:42.8 |
HIP 74043 |
19.52 |
| 2026-04-04 12:00 |
15:06:28.31 |
-44:35:44.9 |
HIP 74043 |
20.65 |
| 2026-04-05 00:00 |
15:06:19.33 |
-44:35:46.4 |
HIP 74043 |
21.86 |
| 2026-04-05 12:00 |
15:06:10.30 |
-44:35:47.4 |
HIP 74043 |
23.12 |
| 2026-04-06 00:00 |
15:06:01.22 |
-44:35:47.8 |
HIP 74043 |
24.44 |
| 2026-04-06 12:00 |
15:05:52.09 |
-44:35:47.8 |
HIP 73878 |
24.48 |
| 2026-04-07 00:00 |
15:05:42.91 |
-44:35:47.1 |
HIP 73669 |
23.19 |
| 2026-04-07 12:00 |
15:05:33.68 |
-44:35:46.0 |
HIP 73669 |
21.55 |
| 2026-04-08 00:00 |
15:05:24.40 |
-44:35:44.3 |
HIP 73669 |
19.90 |
| 2026-04-08 12:00 |
15:05:15.07 |
-44:35:42.0 |
HIP 73669 |
18.24 |
| 2026-04-09 00:00 |
15:05:05.70 |
-44:35:39.3 |
HIP 73669 |
16.57 |
| 2026-04-09 12:00 |
15:04:56.28 |
-44:35:35.9 |
HIP 73669 |
14.89 |
| 2026-04-10 00:00 |
15:04:46.81 |
-44:35:32.1 |
HIP 73669 |
13.20 |
| 2026-04-10 12:00 |
15:04:37.30 |
-44:35:27.6 |
HIP 73669 |
11.51 |
| 2026-04-11 00:00 |
15:04:27.74 |
-44:35:22.7 |
HIP 73669 |
9.81 |
| 2026-04-11 12:00 |
15:04:18.14 |
-44:35:17.2 |
HIP 73669 |
8.10 |
| 2026-04-12 00:00 |
15:04:08.50 |
-44:35:11.1 |
HIP 73669 |
6.38 |
| 2026-04-12 12:00 |
15:03:58.82 |
-44:35:04.5 |
HIP 73669 |
4.66 |
| 2026-04-13 00:00 |
15:03:49.09 |
-44:34:57.3 |
HIP 73669 |
2.94 |
| 2026-04-13 12:00 |
15:03:39.33 |
-44:34:49.6 |
HIP 73669 |
1.25 |
| 2026-04-14 00:00 |
15:03:29.52 |
-44:34:41.4 |
HIP 73669 |
0.78 |
| 2026-04-14 12:00 |
15:03:19.68 |
-44:34:32.5 |
HIP 73669 |
2.41 |
| 2026-04-15 00:00 |
15:03:09.80 |
-44:34:23.2 |
HIP 73669 |
4.16 |
| 2026-04-15 12:00 |
15:02:59.89 |
-44:34:13.3 |
HIP 73669 |
5.93 |
| 2026-04-16 00:00 |
15:02:49.93 |
-44:34:02.8 |
HIP 73669 |
7.70 |