메타데이터
| 항목 |
값 |
| Designation |
C/2021 N3 (PANSTARRS) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2020-08-19T14:19:37.767360Z |
| Orbit solution date (soln_date, UTC) |
2022-12-28T10:18:08Z |
| Obs used |
77 |
| NEO |
- |
| M1 |
7.200 |
| K1 |
12.500 |
| PC |
- |
| Discovery observation (MPC, UTC) |
2021-07-13T12:22:01.401600Z |
| Discovery magnitude (MPC) |
20.56 w |
| Discovery observatory (MPC) |
F51 · Pan-STARRS 1, Haleakala |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2022-04-13.0000000 |
| e |
0.96427540 |
| q (au) |
5.711157 |
| a (au) |
159.866205 |
| i (deg) |
26.748126 |
| Ω (om, deg) |
337.494113 |
| ω (w, deg) |
304.695943 |
| M (ma, deg) |
0.293248 |
밝기
산란 + 전체 선형
$$
M_a = (4.887 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
4.887 |
| n |
6.000 |
| gf |
0.872 |
| gb |
-0.960 |
| k |
1.000 |
| 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) |
| 2026-09-20 00:00 |
00:59:59.52 |
+29:27:36.2 |
HIP 4517 |
27.62 |
| 2026-09-20 12:00 |
00:59:52.61 |
+29:27:27.3 |
HIP 4517 |
26.15 |
| 2026-09-21 00:00 |
00:59:45.68 |
+29:27:18.0 |
HIP 4517 |
24.68 |
| 2026-09-21 12:00 |
00:59:38.72 |
+29:27:08.1 |
HIP 4517 |
23.22 |
| 2026-09-22 00:00 |
00:59:31.73 |
+29:26:57.6 |
HIP 4517 |
21.76 |
| 2026-09-22 12:00 |
00:59:24.72 |
+29:26:46.6 |
HIP 4517 |
20.31 |
| 2026-09-23 00:00 |
00:59:17.69 |
+29:26:35.1 |
HIP 4517 |
18.87 |
| 2026-09-23 12:00 |
00:59:10.64 |
+29:26:23.0 |
HIP 4517 |
17.44 |
| 2026-09-24 00:00 |
00:59:03.57 |
+29:26:10.3 |
HIP 4517 |
16.04 |
| 2026-09-24 12:00 |
00:58:56.47 |
+29:25:57.2 |
HIP 4517 |
14.66 |
| 2026-09-25 00:00 |
00:58:49.36 |
+29:25:43.5 |
HIP 4517 |
13.32 |
| 2026-09-25 12:00 |
00:58:42.23 |
+29:25:29.3 |
HIP 4517 |
12.04 |
| 2026-09-26 00:00 |
00:58:35.08 |
+29:25:14.5 |
HIP 4517 |
10.84 |
| 2026-09-26 12:00 |
00:58:27.91 |
+29:24:59.2 |
HIP 4517 |
9.75 |
| 2026-09-27 00:00 |
00:58:20.73 |
+29:24:43.4 |
HIP 4517 |
8.81 |
| 2026-09-27 12:00 |
00:58:13.53 |
+29:24:27.1 |
HIP 4517 |
8.08 |
| 2026-09-28 00:00 |
00:58:06.31 |
+29:24:10.3 |
HIP 4517 |
7.63 |
| 2026-09-28 12:00 |
00:57:59.08 |
+29:23:52.9 |
HIP 4517 |
7.50 |
| 2026-09-29 00:00 |
00:57:51.83 |
+29:23:35.0 |
HIP 4517 |
7.72 |
| 2026-09-29 12:00 |
00:57:44.58 |
+29:23:16.6 |
HIP 4517 |
8.26 |
| 2026-09-30 00:00 |
00:57:37.31 |
+29:22:57.7 |
HIP 4517 |
9.07 |
| 2026-09-30 12:00 |
00:57:30.02 |
+29:22:38.3 |
HIP 4517 |
10.08 |
| 2026-10-01 00:00 |
00:57:22.73 |
+29:22:18.3 |
HIP 4517 |
11.24 |
| 2026-10-01 12:00 |
00:57:15.43 |
+29:21:57.9 |
HIP 4517 |
12.51 |
| 2026-10-02 00:00 |
00:57:08.12 |
+29:21:36.9 |
HIP 4517 |
13.87 |
| 2026-10-02 12:00 |
00:57:00.80 |
+29:21:15.5 |
HIP 4517 |
15.28 |
| 2026-10-03 00:00 |
00:56:53.47 |
+29:20:53.6 |
HIP 4517 |
16.74 |
| 2026-10-03 12:00 |
00:56:46.13 |
+29:20:31.1 |
HIP 4517 |
18.24 |
| 2026-10-04 00:00 |
00:56:38.79 |
+29:20:08.2 |
HIP 4517 |
19.77 |
| 2026-10-04 12:00 |
00:56:31.44 |
+29:19:44.8 |
HIP 4517 |
21.32 |
| 2026-10-05 00:00 |
00:56:24.09 |
+29:19:20.9 |
HIP 4517 |
22.89 |
| 2026-10-05 12:00 |
00:56:16.73 |
+29:18:56.5 |
HIP 4517 |
24.47 |
| 2026-10-06 00:00 |
00:56:09.37 |
+29:18:31.6 |
HIP 4517 |
26.07 |
| 2026-10-06 12:00 |
00:56:02.00 |
+29:18:06.3 |
HIP 4517 |
27.68 |
| 2026-10-07 00:00 |
00:55:54.64 |
+29:17:40.4 |
HIP 4378 |
29.22 |
| 2026-10-07 12:00 |
00:55:47.28 |
+29:17:14.2 |
HIP 4378 |
29.82 |
| 2026-10-08 00:00 |
00:55:39.91 |
+29:16:47.4 |
HIP 4197 |
29.59 |
| 2026-10-08 12:00 |
00:55:32.55 |
+29:16:20.2 |
HIP 4196 |
27.96 |
| 2026-10-09 00:00 |
00:55:25.19 |
+29:15:52.5 |
HIP 4196 |
26.30 |
| 2026-10-09 12:00 |
00:55:17.83 |
+29:15:24.4 |
HIP 4196 |
24.65 |
| 2026-10-10 00:00 |
00:55:10.47 |
+29:14:55.8 |
HIP 4196 |
23.00 |
| 2026-10-10 12:00 |
00:55:03.12 |
+29:14:26.8 |
HIP 4196 |
21.35 |
| 2026-10-11 00:00 |
00:54:55.77 |
+29:13:57.3 |
HIP 4196 |
19.70 |