메타데이터
| 항목 |
값 |
| Designation |
C/2021 O3 (PANSTARRS) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2022-04-21T00:59:54.507840Z |
| Orbit solution date (soln_date, UTC) |
2024-08-08T14:32:18Z |
| Obs used |
760 |
| NEO |
- |
| M1 |
13.600 |
| K1 |
4.500 |
| PC |
- |
| Discovery observation (MPC, UTC) |
2021-07-26T11:32:37.104000Z |
| Discovery magnitude (MPC) |
19.87 i |
| Discovery observatory (MPC) |
F51 · Pan-STARRS 1, Haleakala |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2021-10-30.0000000 |
| e |
1.00015130 |
| q (au) |
0.287322 |
| a (au) |
-1899.062785 |
| i (deg) |
56.772789 |
| Ω (om, deg) |
189.027335 |
| ω (w, deg) |
299.983286 |
| M (ma, deg) |
-0.002061 |
밝기
산란 + 전체 선형
$$
M_a = (15.384 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
15.384 |
| n |
2.000 |
| gf |
0.800 |
| gb |
-0.680 |
| k |
0.800 |
| 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 |
| 2021-07-26 |
2021-09-18 |
+2.7400 |
-1.427 |
| 2021-09-18 |
2021-11-07 |
+8.8781 |
-4.666 |
| 2021-11-07 |
2021-12-08 |
+4.2020 |
-2.285 |
| 2021-12-08 |
2022-04-19 |
+4.8581 |
-2.406 |
| 2022-04-22 |
2022-07-12 |
-0.0579 |
+1.173 |
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 |
19:42:04.94 |
+36:17:47.7 |
HIP 96924 |
3.35 |
| 2026-06-01 12:00 |
19:41:57.86 |
+36:18:50.0 |
HIP 96924 |
3.08 |
| 2026-06-02 00:00 |
19:41:50.73 |
+36:19:51.6 |
HIP 96924 |
3.75 |
| 2026-06-02 12:00 |
19:41:43.52 |
+36:20:52.5 |
HIP 96924 |
5.00 |
| 2026-06-03 00:00 |
19:41:36.26 |
+36:21:52.6 |
HIP 96924 |
6.51 |
| 2026-06-03 12:00 |
19:41:28.94 |
+36:22:52.0 |
HIP 96924 |
8.14 |
| 2026-06-04 00:00 |
19:41:21.55 |
+36:23:50.6 |
HIP 96924 |
9.82 |
| 2026-06-04 12:00 |
19:41:14.10 |
+36:24:48.4 |
HIP 96924 |
11.54 |
| 2026-06-05 00:00 |
19:41:06.60 |
+36:25:45.4 |
HIP 96924 |
13.28 |
| 2026-06-05 12:00 |
19:40:59.03 |
+36:26:41.7 |
HIP 96924 |
15.04 |
| 2026-06-06 00:00 |
19:40:51.41 |
+36:27:37.2 |
HIP 96924 |
16.81 |
| 2026-06-06 12:00 |
19:40:43.73 |
+36:28:31.8 |
HIP 96924 |
18.59 |
| 2026-06-07 00:00 |
19:40:35.98 |
+36:29:25.7 |
HIP 96924 |
20.38 |
| 2026-06-07 12:00 |
19:40:28.19 |
+36:30:18.8 |
HIP 96924 |
22.17 |
| 2026-06-08 00:00 |
19:40:20.33 |
+36:31:11.1 |
HIP 96924 |
23.97 |
| 2026-06-08 12:00 |
19:40:12.42 |
+36:32:02.5 |
HIP 96924 |
25.77 |
| 2026-06-09 00:00 |
19:40:04.46 |
+36:32:53.1 |
HIP 96924 |
27.58 |
| 2026-06-09 12:00 |
19:39:56.44 |
+36:33:42.9 |
HIP 96924 |
29.39 |
| 2026-06-10 00:00 |
19:39:48.37 |
+36:34:31.9 |
HIP 96670 |
28.93 |
| 2026-06-10 12:00 |
19:39:40.24 |
+36:35:20.1 |
HIP 96670 |
27.80 |
| 2026-06-11 00:00 |
19:39:32.06 |
+36:36:07.4 |
HIP 96670 |
26.75 |
| 2026-06-11 12:00 |
19:39:23.83 |
+36:36:53.8 |
HIP 96670 |
25.81 |
| 2026-06-12 00:00 |
19:39:15.55 |
+36:37:39.4 |
HIP 96670 |
24.98 |
| 2026-06-12 12:00 |
19:39:07.22 |
+36:38:24.2 |
HIP 96670 |
24.27 |
| 2026-06-13 00:00 |
19:38:58.83 |
+36:39:08.1 |
HIP 96670 |
23.69 |
| 2026-06-13 12:00 |
19:38:50.40 |
+36:39:51.1 |
HIP 96670 |
23.27 |
| 2026-06-14 00:00 |
19:38:41.93 |
+36:40:33.2 |
HIP 96670 |
23.00 |
| 2026-06-14 12:00 |
19:38:33.40 |
+36:41:14.5 |
HIP 96670 |
22.89 |
| 2026-06-15 00:00 |
19:38:24.83 |
+36:41:54.9 |
HIP 96670 |
22.94 |
| 2026-06-15 12:00 |
19:38:16.21 |
+36:42:34.4 |
HIP 96446 |
21.68 |
| 2026-06-16 00:00 |
19:38:07.55 |
+36:43:13.1 |
HIP 96446 |
20.14 |
| 2026-06-16 12:00 |
19:37:58.84 |
+36:43:50.8 |
HIP 96446 |
18.65 |
| 2026-06-17 00:00 |
19:37:50.09 |
+36:44:27.6 |
HIP 96446 |
17.22 |
| 2026-06-17 12:00 |
19:37:41.30 |
+36:45:03.6 |
HIP 96446 |
15.86 |
| 2026-06-18 00:00 |
19:37:32.46 |
+36:45:38.6 |
HIP 96446 |
14.60 |
| 2026-06-18 12:00 |
19:37:23.59 |
+36:46:12.7 |
HIP 96446 |
13.46 |
| 2026-06-19 00:00 |
19:37:14.68 |
+36:46:46.0 |
HIP 96446 |
12.49 |
| 2026-06-19 12:00 |
19:37:05.72 |
+36:47:18.3 |
HIP 96446 |
11.71 |
| 2026-06-20 00:00 |
19:36:56.73 |
+36:47:49.7 |
HIP 96446 |
11.19 |
| 2026-06-20 12:00 |
19:36:47.71 |
+36:48:20.2 |
HIP 96446 |
10.94 |
| 2026-06-21 00:00 |
19:36:38.64 |
+36:48:49.8 |
HIP 96446 |
11.00 |
| 2026-06-21 12:00 |
19:36:29.54 |
+36:49:18.4 |
HIP 96387 |
11.06 |
| 2026-06-22 00:00 |
19:36:20.41 |
+36:49:46.1 |
HIP 96387 |
9.43 |