메타데이터
| 항목 |
값 |
| Designation |
C/2023 F2 (SOHO) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2023-03-21T03:59:23.654400Z |
| Orbit solution date (soln_date, UTC) |
2025-02-28T10:03:47Z |
| Obs used |
82 |
| NEO |
- |
| M1 |
20.800 |
| K1 |
10.000 |
| PC |
- |
| Discovery observation (MPC, UTC) |
2023-03-21T00:06:17.568000Z |
| Discovery magnitude (MPC) |
4.90 V |
| Discovery observatory (MPC) |
249 · SOHO |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2023-03-21.0000000 |
| e |
1.01189649 |
| q (au) |
0.034240 |
| a (au) |
-2.878182 |
| i (deg) |
72.567452 |
| Ω (om, deg) |
71.422437 |
| ω (w, deg) |
57.765098 |
| M (ma, deg) |
-0.033557 |
밝기
산란 + 전체 선형
$$
M_a = (20.000 + 3.781\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
20.000 |
| n |
3.781 |
| gf |
0.800 |
| gb |
-1.000 |
| k |
0.800 |
| δ90 |
1.000 |
| 파라미터 |
기호 |
범위 |
설명 |
| 태양·지구거리 1 AU에서의 절대등급 |
H0 |
-5 to 20 |
혜성의 고유 밝기 |
| 광도 기울기 파라미터 |
n |
2 to 6 |
태양거리 변화에 따른 밝기 변화율 |
| 전방 산란 비대칭 계수 |
gf |
0.8 to 1 |
전방 산란의 강도 |
| 후방 산란 비대칭 계수 |
gb |
-1 to -0.5 |
후방 산란의 강도 |
| 분할 계수 |
k |
0.8 to 1 |
전·후방 산란 기여도 비율 |
| 먼지/가스 밝기 비 |
δ90 |
1 to 10 |
코마에서 먼지 산란 대비 가스 방출의 상대 기여 |
참고: EPSC-DPS2025-160
천체력
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-07-29 00:00 |
17:32:33.92 |
-70:04:58.9 |
HIP 85953 |
9.60 |
| 2026-07-29 12:00 |
17:32:19.56 |
-70:04:04.4 |
HIP 85953 |
10.09 |
| 2026-07-30 00:00 |
17:32:05.36 |
-70:03:09.4 |
HIP 85953 |
10.77 |
| 2026-07-30 12:00 |
17:31:51.31 |
-70:02:14.0 |
HIP 85953 |
11.60 |
| 2026-07-31 00:00 |
17:31:37.41 |
-70:01:18.1 |
HIP 85649 |
10.45 |
| 2026-07-31 12:00 |
17:31:23.66 |
-70:00:21.8 |
HIP 85649 |
8.96 |
| 2026-08-01 00:00 |
17:31:10.08 |
-69:59:25.0 |
HIP 85649 |
7.48 |
| 2026-08-01 12:00 |
17:30:56.65 |
-69:58:27.9 |
HIP 85649 |
6.02 |
| 2026-08-02 00:00 |
17:30:43.37 |
-69:57:30.2 |
HIP 85649 |
4.57 |
| 2026-08-02 12:00 |
17:30:30.26 |
-69:56:32.2 |
HIP 85649 |
3.16 |
| 2026-08-03 00:00 |
17:30:17.30 |
-69:55:33.8 |
HIP 85649 |
1.86 |
| 2026-08-03 12:00 |
17:30:04.50 |
-69:54:34.9 |
HIP 85649 |
1.13 |
| 2026-08-04 00:00 |
17:29:51.86 |
-69:53:35.7 |
HIP 85649 |
1.84 |
| 2026-08-04 12:00 |
17:29:39.39 |
-69:52:36.1 |
HIP 85649 |
3.13 |
| 2026-08-05 00:00 |
17:29:27.07 |
-69:51:36.1 |
HIP 85649 |
4.51 |
| 2026-08-05 12:00 |
17:29:14.92 |
-69:50:35.7 |
HIP 85649 |
5.92 |
| 2026-08-06 00:00 |
17:29:02.92 |
-69:49:35.0 |
HIP 85649 |
7.34 |
| 2026-08-06 12:00 |
17:28:51.10 |
-69:48:33.9 |
HIP 85649 |
8.76 |
| 2026-08-07 00:00 |
17:28:39.43 |
-69:47:32.4 |
HIP 85649 |
10.18 |
| 2026-08-07 12:00 |
17:28:27.93 |
-69:46:30.6 |
HIP 85649 |
11.60 |
| 2026-08-08 00:00 |
17:28:16.59 |
-69:45:28.4 |
HIP 85649 |
13.02 |
| 2026-08-08 12:00 |
17:28:05.42 |
-69:44:25.9 |
HIP 85649 |
14.43 |
| 2026-08-09 00:00 |
17:27:54.42 |
-69:43:23.1 |
HIP 85649 |
15.83 |
| 2026-08-09 12:00 |
17:27:43.58 |
-69:42:20.0 |
HIP 85649 |
17.23 |
| 2026-08-10 00:00 |
17:27:32.91 |
-69:41:16.6 |
HIP 85649 |
18.63 |
| 2026-08-10 12:00 |
17:27:22.40 |
-69:40:12.8 |
HIP 85649 |
20.02 |
| 2026-08-11 00:00 |
17:27:12.06 |
-69:39:08.8 |
HIP 85473 |
19.28 |
| 2026-08-11 12:00 |
17:27:01.90 |
-69:38:04.4 |
HIP 85473 |
18.47 |
| 2026-08-12 00:00 |
17:26:51.90 |
-69:36:59.8 |
HIP 85473 |
17.73 |
| 2026-08-12 12:00 |
17:26:42.06 |
-69:35:54.9 |
HIP 85473 |
17.06 |
| 2026-08-13 00:00 |
17:26:32.40 |
-69:34:49.7 |
HIP 85473 |
16.46 |
| 2026-08-13 12:00 |
17:26:22.91 |
-69:33:44.3 |
HIP 85473 |
15.95 |
| 2026-08-14 00:00 |
17:26:13.59 |
-69:32:38.6 |
HIP 85473 |
15.54 |
| 2026-08-14 12:00 |
17:26:04.43 |
-69:31:32.7 |
HIP 85093 |
14.89 |
| 2026-08-15 00:00 |
17:25:55.45 |
-69:30:26.5 |
HIP 85093 |
13.74 |
| 2026-08-15 12:00 |
17:25:46.64 |
-69:29:20.1 |
HIP 85093 |
12.64 |
| 2026-08-16 00:00 |
17:25:37.99 |
-69:28:13.5 |
HIP 85093 |
11.61 |
| 2026-08-16 12:00 |
17:25:29.52 |
-69:27:06.6 |
HIP 85093 |
10.66 |
| 2026-08-17 00:00 |
17:25:21.22 |
-69:25:59.6 |
HIP 85093 |
9.82 |
| 2026-08-17 12:00 |
17:25:13.09 |
-69:24:52.3 |
HIP 85093 |
9.11 |
| 2026-08-18 00:00 |
17:25:05.13 |
-69:23:44.9 |
HIP 85093 |
8.56 |
| 2026-08-18 12:00 |
17:24:57.33 |
-69:22:37.2 |
HIP 85093 |
8.21 |
| 2026-08-19 00:00 |
17:24:49.71 |
-69:21:29.4 |
HIP 85093 |
8.07 |