메타데이터
| 항목 |
값 |
| Designation |
C/2016 A1 (PANSTARRS) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2017-11-23T08:54:05.518080Z |
| Orbit solution date (soln_date, UTC) |
2022-07-19T01:12:15Z |
| Obs used |
2143 |
| NEO |
- |
| M1 |
6.400 |
| K1 |
9.250 |
| PC |
0.030 |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2017-11-13.0000000 |
| e |
1.00196775 |
| q (au) |
5.327762 |
| a (au) |
-2707.536844 |
| i (deg) |
121.185405 |
| Ω (om, deg) |
128.174457 |
| ω (w, deg) |
10.320070 |
| M (ma, deg) |
-0.000073 |
밝기
산란 + 전체 선형
$$
M_a = (5.402 + 3.724\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
5.402 |
| n |
3.724 |
| gf |
1.000 |
| gb |
-1.000 |
| 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 |
| 2016-01-01 |
2017-11-22 |
-2.3519 |
+1.891 |
| 2017-11-26 |
2019-03-10 |
-2.2345 |
+1.488 |
| 2019-03-10 |
2020-02-15 |
+16.2456 |
-13.536 |
log10 r = log10(태양거리/AU), Δ = 지구거리(AU)
천체력
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-05-12 00:00 |
21:56:56.04 |
+33:11:50.7 |
HIP 108403 |
12.53 |
| 2026-05-12 12:00 |
21:56:56.30 |
+33:12:42.1 |
HIP 108278 |
13.08 |
| 2026-05-13 00:00 |
21:56:56.50 |
+33:13:33.4 |
HIP 108278 |
12.52 |
| 2026-05-13 12:00 |
21:56:56.64 |
+33:14:24.6 |
HIP 108278 |
11.99 |
| 2026-05-14 00:00 |
21:56:56.73 |
+33:15:15.7 |
HIP 108278 |
11.49 |
| 2026-05-14 12:00 |
21:56:56.76 |
+33:16:06.6 |
HIP 108278 |
11.02 |
| 2026-05-15 00:00 |
21:56:56.73 |
+33:16:57.5 |
HIP 108278 |
10.59 |
| 2026-05-15 12:00 |
21:56:56.65 |
+33:17:48.2 |
HIP 108278 |
10.20 |
| 2026-05-16 00:00 |
21:56:56.51 |
+33:18:38.7 |
HIP 108278 |
9.86 |
| 2026-05-16 12:00 |
21:56:56.31 |
+33:19:29.1 |
HIP 108278 |
9.57 |
| 2026-05-17 00:00 |
21:56:56.05 |
+33:20:19.4 |
HIP 108278 |
9.34 |
| 2026-05-17 12:00 |
21:56:55.74 |
+33:21:09.5 |
HIP 108278 |
9.16 |
| 2026-05-18 00:00 |
21:56:55.37 |
+33:21:59.5 |
HIP 108278 |
9.05 |
| 2026-05-18 12:00 |
21:56:54.94 |
+33:22:49.3 |
HIP 108278 |
9.00 |
| 2026-05-19 00:00 |
21:56:54.45 |
+33:23:38.9 |
HIP 108278 |
9.02 |
| 2026-05-19 12:00 |
21:56:53.91 |
+33:24:28.4 |
HIP 108278 |
9.10 |
| 2026-05-20 00:00 |
21:56:53.31 |
+33:25:17.7 |
HIP 108278 |
9.24 |
| 2026-05-20 12:00 |
21:56:52.65 |
+33:26:06.8 |
HIP 108278 |
9.45 |
| 2026-05-21 00:00 |
21:56:51.93 |
+33:26:55.7 |
HIP 108278 |
9.70 |
| 2026-05-21 12:00 |
21:56:51.16 |
+33:27:44.4 |
HIP 108278 |
10.01 |
| 2026-05-22 00:00 |
21:56:50.33 |
+33:28:33.0 |
HIP 108278 |
10.37 |
| 2026-05-22 12:00 |
21:56:49.44 |
+33:29:21.3 |
HIP 108278 |
10.76 |
| 2026-05-23 00:00 |
21:56:48.49 |
+33:30:09.4 |
HIP 108278 |
11.19 |
| 2026-05-23 12:00 |
21:56:47.49 |
+33:30:57.3 |
HIP 108278 |
11.66 |
| 2026-05-24 00:00 |
21:56:46.43 |
+33:31:45.0 |
HIP 108278 |
12.15 |
| 2026-05-24 12:00 |
21:56:45.31 |
+33:32:32.5 |
HIP 108278 |
12.67 |
| 2026-05-25 00:00 |
21:56:44.13 |
+33:33:19.8 |
HIP 108278 |
13.20 |
| 2026-05-25 12:00 |
21:56:42.90 |
+33:34:06.9 |
HIP 108278 |
13.76 |
| 2026-05-26 00:00 |
21:56:41.61 |
+33:34:53.7 |
HIP 108278 |
14.34 |
| 2026-05-26 12:00 |
21:56:40.26 |
+33:35:40.3 |
HIP 108278 |
14.93 |
| 2026-05-27 00:00 |
21:56:38.86 |
+33:36:26.6 |
HIP 108278 |
15.54 |
| 2026-05-27 12:00 |
21:56:37.39 |
+33:37:12.7 |
HIP 108278 |
16.15 |
| 2026-05-28 00:00 |
21:56:35.87 |
+33:37:58.6 |
HIP 108278 |
16.78 |
| 2026-05-28 12:00 |
21:56:34.30 |
+33:38:44.2 |
HIP 108278 |
17.42 |
| 2026-05-29 00:00 |
21:56:32.66 |
+33:39:29.5 |
HIP 108278 |
18.06 |
| 2026-05-29 12:00 |
21:56:30.97 |
+33:40:14.6 |
HIP 108278 |
18.72 |
| 2026-05-30 00:00 |
21:56:29.22 |
+33:40:59.5 |
HIP 108278 |
19.38 |
| 2026-05-30 12:00 |
21:56:27.42 |
+33:41:44.0 |
HIP 108278 |
20.04 |
| 2026-05-31 00:00 |
21:56:25.56 |
+33:42:28.3 |
HIP 108278 |
20.71 |
| 2026-05-31 12:00 |
21:56:23.64 |
+33:43:12.3 |
HIP 108278 |
21.39 |
| 2026-06-01 00:00 |
21:56:21.66 |
+33:43:56.1 |
HIP 108278 |
22.08 |
| 2026-06-01 12:00 |
21:56:19.63 |
+33:44:39.5 |
HIP 108278 |
22.76 |
| 2026-06-02 00:00 |
21:56:17.54 |
+33:45:22.7 |
HIP 108278 |
23.46 |