메타데이터
| 항목 |
값 |
| Designation |
C/2012 F3 (PANSTARRS) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2015-04-06T16:44:17.200320Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:32:06Z |
| Obs used |
1763 |
| NEO |
- |
| M1 |
8.100 |
| K1 |
7.500 |
| PC |
0.030 |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2014-11-27.0000000 |
| e |
1.00163676 |
| q (au) |
3.456939 |
| a (au) |
-2112.060187 |
| i (deg) |
11.354698 |
| Ω (om, deg) |
164.617309 |
| ω (w, deg) |
104.020514 |
| M (ma, deg) |
-0.001327 |
밝기
산란 + 전체 선형
$$
M_a = (11.830 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
11.830 |
| n |
2.000 |
| gf |
1.000 |
| gb |
-0.609 |
| 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 |
| 2012-01-19 |
2015-04-02 |
+2.7355 |
-2.126 |
| 2015-04-10 |
2016-06-05 |
-2.9643 |
+1.982 |
| 2016-06-05 |
2016-09-23 |
-1.7407 |
+1.316 |
| 2016-09-23 |
2017-10-17 |
+7.8916 |
-5.843 |
log10 r = log10(태양거리/AU), Δ = 지구거리(AU)
천체력
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-07-29 00:00 |
03:09:14.28 |
+07:30:11.2 |
HIP 14640 |
2.72 |
| 2026-07-29 12:00 |
03:09:15.75 |
+07:30:04.8 |
HIP 14640 |
2.78 |
| 2026-07-30 00:00 |
03:09:17.18 |
+07:29:58.3 |
HIP 14640 |
2.87 |
| 2026-07-30 12:00 |
03:09:18.58 |
+07:29:51.6 |
HIP 14640 |
3.00 |
| 2026-07-31 00:00 |
03:09:19.94 |
+07:29:44.8 |
HIP 14640 |
3.15 |
| 2026-07-31 12:00 |
03:09:21.27 |
+07:29:37.7 |
HIP 14640 |
3.33 |
| 2026-08-01 00:00 |
03:09:22.56 |
+07:29:30.5 |
HIP 14640 |
3.53 |
| 2026-08-01 12:00 |
03:09:23.81 |
+07:29:23.1 |
HIP 14640 |
3.73 |
| 2026-08-02 00:00 |
03:09:25.03 |
+07:29:15.5 |
HIP 14640 |
3.95 |
| 2026-08-02 12:00 |
03:09:26.21 |
+07:29:07.8 |
HIP 14640 |
4.17 |
| 2026-08-03 00:00 |
03:09:27.36 |
+07:28:59.8 |
HIP 14640 |
4.39 |
| 2026-08-03 12:00 |
03:09:28.47 |
+07:28:51.8 |
HIP 14640 |
4.61 |
| 2026-08-04 00:00 |
03:09:29.54 |
+07:28:43.5 |
HIP 14640 |
4.84 |
| 2026-08-04 12:00 |
03:09:30.58 |
+07:28:35.1 |
HIP 14640 |
5.06 |
| 2026-08-05 00:00 |
03:09:31.57 |
+07:28:26.5 |
HIP 14640 |
5.28 |
| 2026-08-05 12:00 |
03:09:32.54 |
+07:28:17.7 |
HIP 14640 |
5.50 |
| 2026-08-06 00:00 |
03:09:33.46 |
+07:28:08.7 |
HIP 14640 |
5.71 |
| 2026-08-06 12:00 |
03:09:34.35 |
+07:27:59.6 |
HIP 14640 |
5.92 |
| 2026-08-07 00:00 |
03:09:35.20 |
+07:27:50.3 |
HIP 14640 |
6.12 |
| 2026-08-07 12:00 |
03:09:36.02 |
+07:27:40.9 |
HIP 14640 |
6.32 |
| 2026-08-08 00:00 |
03:09:36.79 |
+07:27:31.2 |
HIP 14640 |
6.51 |
| 2026-08-08 12:00 |
03:09:37.53 |
+07:27:21.4 |
HIP 14640 |
6.70 |
| 2026-08-09 00:00 |
03:09:38.24 |
+07:27:11.5 |
HIP 14640 |
6.88 |
| 2026-08-09 12:00 |
03:09:38.90 |
+07:27:01.4 |
HIP 14640 |
7.06 |
| 2026-08-10 00:00 |
03:09:39.53 |
+07:26:51.1 |
HIP 14640 |
7.23 |
| 2026-08-10 12:00 |
03:09:40.12 |
+07:26:40.6 |
HIP 14640 |
7.40 |
| 2026-08-11 00:00 |
03:09:40.67 |
+07:26:30.0 |
HIP 14640 |
7.56 |
| 2026-08-11 12:00 |
03:09:41.19 |
+07:26:19.2 |
HIP 14640 |
7.71 |
| 2026-08-12 00:00 |
03:09:41.66 |
+07:26:08.2 |
HIP 14640 |
7.86 |
| 2026-08-12 12:00 |
03:09:42.10 |
+07:25:57.1 |
HIP 14640 |
8.00 |
| 2026-08-13 00:00 |
03:09:42.50 |
+07:25:45.8 |
HIP 14640 |
8.14 |
| 2026-08-13 12:00 |
03:09:42.86 |
+07:25:34.4 |
HIP 14640 |
8.27 |
| 2026-08-14 00:00 |
03:09:43.19 |
+07:25:22.8 |
HIP 14640 |
8.40 |
| 2026-08-14 12:00 |
03:09:43.48 |
+07:25:11.0 |
HIP 14640 |
8.52 |
| 2026-08-15 00:00 |
03:09:43.73 |
+07:24:59.1 |
HIP 14640 |
8.64 |
| 2026-08-15 12:00 |
03:09:43.94 |
+07:24:47.0 |
HIP 14640 |
8.75 |
| 2026-08-16 00:00 |
03:09:44.11 |
+07:24:34.8 |
HIP 14640 |
8.86 |
| 2026-08-16 12:00 |
03:09:44.24 |
+07:24:22.4 |
HIP 14640 |
8.97 |
| 2026-08-17 00:00 |
03:09:44.34 |
+07:24:09.9 |
HIP 14640 |
9.07 |
| 2026-08-17 12:00 |
03:09:44.40 |
+07:23:57.2 |
HIP 14640 |
9.16 |
| 2026-08-18 00:00 |
03:09:44.42 |
+07:23:44.3 |
HIP 14640 |
9.26 |
| 2026-08-18 12:00 |
03:09:44.40 |
+07:23:31.3 |
HIP 14640 |
9.35 |
| 2026-08-19 00:00 |
03:09:44.35 |
+07:23:18.2 |
HIP 14640 |
9.43 |