메타데이터
| 항목 |
값 |
| Designation |
C/2020 PV6 (PANSTARRS) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2021-09-25T23:59:11.313600Z |
| Orbit solution date (soln_date, UTC) |
2024-07-30T14:57:24Z |
| Obs used |
1749 |
| NEO |
- |
| M1 |
7.500 |
| K1 |
17.250 |
| PC |
0.030 |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2021-09-30.0000000 |
| e |
0.94495091 |
| q (au) |
2.295631 |
| a (au) |
41.701535 |
| i (deg) |
128.239287 |
| Ω (om, deg) |
329.143872 |
| ω (w, deg) |
71.380642 |
| M (ma, deg) |
0.014642 |
밝기
산란 + 전체 선형
$$
M_a = (6.667 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
6.667 |
| n |
6.000 |
| gf |
1.000 |
| gb |
-0.998 |
| k |
1.000 |
| δ90 |
10.000 |
| 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
잔차 (구간 선형)
$$\epsilon = a \log_{10} r_{\mathrm{au}} + b$$
| 시작일 (UTC) |
끝 (UTC) |
a |
b |
| 2021-05-30 |
2021-09-22 |
+4.0425 |
-1.521 |
| 2021-09-26 |
2022-05-23 |
+13.2958 |
-5.599 |
log10 r = log10(태양거리/AU), Δ = 지구거리(AU)
천체력
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-06-01 00:00 |
08:24:17.87 |
-00:28:24.2 |
HIP 41230 |
21.43 |
| 2026-06-01 12:00 |
08:24:21.77 |
-00:28:18.4 |
HIP 41230 |
21.01 |
| 2026-06-02 00:00 |
08:24:25.73 |
-00:28:13.1 |
HIP 41313 |
20.38 |
| 2026-06-02 12:00 |
08:24:29.74 |
-00:28:08.2 |
HIP 41313 |
19.38 |
| 2026-06-03 00:00 |
08:24:33.79 |
-00:28:03.7 |
HIP 41313 |
18.37 |
| 2026-06-03 12:00 |
08:24:37.90 |
-00:27:59.7 |
HIP 41313 |
17.35 |
| 2026-06-04 00:00 |
08:24:42.05 |
-00:27:56.0 |
HIP 41313 |
16.32 |
| 2026-06-04 12:00 |
08:24:46.26 |
-00:27:52.8 |
HIP 41313 |
15.28 |
| 2026-06-05 00:00 |
08:24:50.51 |
-00:27:50.0 |
HIP 41313 |
14.23 |
| 2026-06-05 12:00 |
08:24:54.81 |
-00:27:47.6 |
HIP 41313 |
13.17 |
| 2026-06-06 00:00 |
08:24:59.15 |
-00:27:45.7 |
HIP 41313 |
12.11 |
| 2026-06-06 12:00 |
08:25:03.54 |
-00:27:44.1 |
HIP 41313 |
11.05 |
| 2026-06-07 00:00 |
08:25:07.98 |
-00:27:43.0 |
HIP 41313 |
9.98 |
| 2026-06-07 12:00 |
08:25:12.47 |
-00:27:42.3 |
HIP 41313 |
8.91 |
| 2026-06-08 00:00 |
08:25:17.00 |
-00:27:42.0 |
HIP 41313 |
7.85 |
| 2026-06-08 12:00 |
08:25:21.58 |
-00:27:42.2 |
HIP 41313 |
6.81 |
| 2026-06-09 00:00 |
08:25:26.20 |
-00:27:42.7 |
HIP 41313 |
5.80 |
| 2026-06-09 12:00 |
08:25:30.87 |
-00:27:43.7 |
HIP 41313 |
4.85 |
| 2026-06-10 00:00 |
08:25:35.58 |
-00:27:45.1 |
HIP 41313 |
4.02 |
| 2026-06-10 12:00 |
08:25:40.33 |
-00:27:46.9 |
HIP 41313 |
3.40 |
| 2026-06-11 00:00 |
08:25:45.13 |
-00:27:49.2 |
HIP 41313 |
3.13 |
| 2026-06-11 12:00 |
08:25:49.97 |
-00:27:51.9 |
HIP 120004 |
3.30 |
| 2026-06-12 00:00 |
08:25:54.85 |
-00:27:54.9 |
HIP 120004 |
3.69 |
| 2026-06-12 12:00 |
08:25:59.77 |
-00:27:58.5 |
HIP 120004 |
4.41 |
| 2026-06-13 00:00 |
08:26:04.74 |
-00:28:02.4 |
HIP 120004 |
5.33 |
| 2026-06-13 12:00 |
08:26:09.75 |
-00:28:06.8 |
HIP 120004 |
6.37 |
| 2026-06-14 00:00 |
08:26:14.79 |
-00:28:11.6 |
HIP 120004 |
7.50 |
| 2026-06-14 12:00 |
08:26:19.88 |
-00:28:16.8 |
HIP 120004 |
8.67 |
| 2026-06-15 00:00 |
08:26:25.01 |
-00:28:22.4 |
HIP 120004 |
9.88 |
| 2026-06-15 12:00 |
08:26:30.17 |
-00:28:28.5 |
HIP 41425 |
10.51 |
| 2026-06-16 00:00 |
08:26:35.38 |
-00:28:34.9 |
HIP 41425 |
9.80 |
| 2026-06-16 12:00 |
08:26:40.62 |
-00:28:41.8 |
HIP 41425 |
9.23 |
| 2026-06-17 00:00 |
08:26:45.90 |
-00:28:49.2 |
HIP 41425 |
8.81 |
| 2026-06-17 12:00 |
08:26:51.21 |
-00:28:56.9 |
HIP 41425 |
8.59 |
| 2026-06-18 00:00 |
08:26:56.56 |
-00:29:05.1 |
HIP 41425 |
8.58 |
| 2026-06-18 12:00 |
08:27:01.95 |
-00:29:13.6 |
HIP 41425 |
8.78 |
| 2026-06-19 00:00 |
08:27:07.38 |
-00:29:22.6 |
HIP 41425 |
9.20 |
| 2026-06-19 12:00 |
08:27:12.84 |
-00:29:32.1 |
HIP 41425 |
9.79 |
| 2026-06-20 00:00 |
08:27:18.33 |
-00:29:41.9 |
HIP 41425 |
10.55 |
| 2026-06-20 12:00 |
08:27:23.86 |
-00:29:52.2 |
HIP 41425 |
11.43 |
| 2026-06-21 00:00 |
08:27:29.42 |
-00:30:02.8 |
HIP 41425 |
12.41 |
| 2026-06-21 12:00 |
08:27:35.01 |
-00:30:13.9 |
HIP 41425 |
13.48 |
| 2026-06-22 00:00 |
08:27:40.63 |
-00:30:25.4 |
HIP 41425 |
14.62 |