| Parameter |
Value |
| Designation |
C/2024 V1 (Borisov) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2025-04-04T02:28:15.268800Z |
| Orbit solution date (soln_date, UTC) |
2025-06-26T10:13:10Z |
| Obs used |
422 |
| NEO |
- |
| M1 |
13.600 |
| K1 |
9.250 |
| PC |
- |
| Discovery observation (MPC, UTC) |
2024-11-08T01:11:04.704000Z |
| Discovery magnitude (MPC) |
19.30 G |
| Discovery observatory (MPC) |
L51 · MARGO, Nauchnyi |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
2025-02-14.0000000 |
| e |
0.99016034 |
| q (au) |
2.318468 |
| a (au) |
235.624767 |
| i (deg) |
54.623265 |
| Ω (om, deg) |
328.195162 |
| ω (w, deg) |
168.663803 |
| M (ma, deg) |
359.986619 |
Magnitude
Scatter + Global Linear
$$
M_a = (14.076 + 4.289\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
14.076 |
| n |
4.289 |
| gf |
1.000 |
| gb |
-0.585 |
| 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) |
| 2026-05-12 00:00 |
10:43:05.59 |
-68:22:45.4 |
HIP 52637 |
21.37 |
| 2026-05-12 12:00 |
10:42:57.01 |
-68:19:08.2 |
HIP 52637 |
19.68 |
| 2026-05-13 00:00 |
10:42:49.05 |
-68:15:30.6 |
HIP 52637 |
18.53 |
| 2026-05-13 12:00 |
10:42:41.70 |
-68:11:52.8 |
HIP 52637 |
18.03 |
| 2026-05-14 00:00 |
10:42:34.97 |
-68:08:14.8 |
HIP 52637 |
18.22 |
| 2026-05-14 12:00 |
10:42:28.84 |
-68:04:36.6 |
HIP 52637 |
19.09 |
| 2026-05-15 00:00 |
10:42:23.31 |
-68:00:58.3 |
HIP 52637 |
20.53 |
| 2026-05-15 12:00 |
10:42:18.38 |
-67:57:19.9 |
HIP 52637 |
22.45 |
| 2026-05-16 00:00 |
10:42:14.04 |
-67:53:41.4 |
HIP 52637 |
24.72 |
| 2026-05-16 12:00 |
10:42:10.28 |
-67:50:02.9 |
HIP 52637 |
27.25 |
| 2026-05-17 00:00 |
10:42:07.10 |
-67:46:24.5 |
HIP 52445 |
29.77 |
| 2026-05-17 12:00 |
10:42:04.50 |
-67:42:46.1 |
HIP 52445 |
26.30 |
| 2026-05-18 00:00 |
10:42:02.47 |
-67:39:07.7 |
HIP 52445 |
22.87 |
| 2026-05-18 12:00 |
10:42:01.00 |
-67:35:29.5 |
HIP 52445 |
19.50 |
| 2026-05-19 00:00 |
10:42:00.09 |
-67:31:51.5 |
HIP 52445 |
16.23 |
| 2026-05-19 12:00 |
10:41:59.73 |
-67:28:13.7 |
HIP 52445 |
13.12 |
| 2026-05-20 00:00 |
10:41:59.92 |
-67:24:36.1 |
HIP 52445 |
10.32 |
| 2026-05-20 12:00 |
10:42:00.65 |
-67:20:58.8 |
HIP 52445 |
8.15 |
| 2026-05-21 00:00 |
10:42:01.92 |
-67:17:21.8 |
HIP 52445 |
7.20 |
| 2026-05-21 12:00 |
10:42:03.72 |
-67:13:45.1 |
HIP 52445 |
7.91 |
| 2026-05-22 00:00 |
10:42:06.04 |
-67:10:08.8 |
HIP 52445 |
9.94 |
| 2026-05-22 12:00 |
10:42:08.88 |
-67:06:32.9 |
HIP 52445 |
12.66 |
| 2026-05-23 00:00 |
10:42:12.24 |
-67:02:57.4 |
HIP 52445 |
15.71 |
| 2026-05-23 12:00 |
10:42:16.10 |
-66:59:22.4 |
HIP 52445 |
18.94 |
| 2026-05-24 00:00 |
10:42:20.46 |
-66:55:47.8 |
HIP 52540 |
20.15 |
| 2026-05-24 12:00 |
10:42:25.33 |
-66:52:13.7 |
HIP 52540 |
17.25 |
| 2026-05-25 00:00 |
10:42:30.68 |
-66:48:40.2 |
HIP 52540 |
14.62 |
| 2026-05-25 12:00 |
10:42:36.51 |
-66:45:07.3 |
HIP 52540 |
12.45 |
| 2026-05-26 00:00 |
10:42:42.83 |
-66:41:34.9 |
HIP 52540 |
10.99 |
| 2026-05-26 12:00 |
10:42:49.62 |
-66:38:03.2 |
HIP 52540 |
10.55 |
| 2026-05-27 00:00 |
10:42:56.89 |
-66:34:32.0 |
HIP 52540 |
11.26 |
| 2026-05-27 12:00 |
10:43:04.61 |
-66:31:01.6 |
HIP 52540 |
12.91 |
| 2026-05-28 00:00 |
10:43:12.80 |
-66:27:31.8 |
HIP 52540 |
15.22 |
| 2026-05-28 12:00 |
10:43:21.44 |
-66:24:02.7 |
HIP 52540 |
17.92 |
| 2026-05-29 00:00 |
10:43:30.52 |
-66:20:34.3 |
HIP 52540 |
20.86 |
| 2026-05-29 12:00 |
10:43:40.06 |
-66:17:06.7 |
HIP 52286 |
19.56 |
| 2026-05-30 00:00 |
10:43:50.03 |
-66:13:39.8 |
HIP 52286 |
18.70 |
| 2026-05-30 12:00 |
10:44:00.43 |
-66:10:13.8 |
HIP 52286 |
18.57 |
| 2026-05-31 00:00 |
10:44:11.27 |
-66:06:48.5 |
HIP 52286 |
19.17 |
| 2026-05-31 12:00 |
10:44:22.52 |
-66:03:24.1 |
HIP 52766 |
19.95 |
| 2026-06-01 00:00 |
10:44:34.20 |
-66:00:00.5 |
HIP 52766 |
17.66 |
| 2026-06-01 12:00 |
10:44:46.30 |
-65:56:37.7 |
HIP 52766 |
15.82 |
| 2026-06-02 00:00 |
10:44:58.80 |
-65:53:15.9 |
HIP 52766 |
14.59 |