메타데이터
| 항목 |
값 |
| Designation |
C/2014 Q3 (Borisov) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2014-11-19T01:37:12.034560Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:32:59Z |
| Obs used |
766 |
| NEO |
- |
| M1 |
8.800 |
| K1 |
22.000 |
| PC |
0.030 |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2014-10-19.0000000 |
| e |
0.94206319 |
| q (au) |
1.647407 |
| a (au) |
28.434555 |
| i (deg) |
89.948878 |
| Ω (om, deg) |
63.129517 |
| ω (w, deg) |
47.380883 |
| M (ma, deg) |
359.798051 |
밝기
산란 + 전체 선형
$$
M_a = (13.028 + 2.018\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
13.028 |
| n |
2.018 |
| 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 |
| 2014-08-22 |
2014-11-18 |
+16.4094 |
-4.762 |
| 2014-11-19 |
2015-03-24 |
+26.2508 |
-7.298 |
log10 r = log10(태양거리/AU), Δ = 지구거리(AU)
천체력
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-03-26 00:00 |
15:49:45.15 |
-45:26:50.2 |
HIP 77574 |
6.11 |
| 2026-03-26 12:00 |
15:49:40.95 |
-45:27:14.0 |
HIP 77574 |
6.95 |
| 2026-03-27 00:00 |
15:49:36.69 |
-45:27:37.6 |
HIP 77574 |
7.79 |
| 2026-03-27 12:00 |
15:49:32.38 |
-45:28:00.8 |
HIP 77574 |
8.64 |
| 2026-03-28 00:00 |
15:49:28.03 |
-45:28:23.8 |
HIP 77574 |
9.49 |
| 2026-03-28 12:00 |
15:49:23.62 |
-45:28:46.6 |
HIP 77574 |
10.35 |
| 2026-03-29 00:00 |
15:49:19.16 |
-45:29:09.0 |
HIP 77574 |
11.22 |
| 2026-03-29 12:00 |
15:49:14.65 |
-45:29:31.2 |
HIP 77574 |
12.09 |
| 2026-03-30 00:00 |
15:49:10.08 |
-45:29:53.1 |
HIP 77574 |
12.97 |
| 2026-03-30 12:00 |
15:49:05.47 |
-45:30:14.7 |
HIP 77574 |
13.86 |
| 2026-03-31 00:00 |
15:49:00.81 |
-45:30:36.0 |
HIP 77574 |
14.75 |
| 2026-03-31 12:00 |
15:48:56.11 |
-45:30:57.0 |
HIP 77574 |
15.64 |
| 2026-04-01 00:00 |
15:48:51.35 |
-45:31:17.8 |
HIP 77574 |
16.54 |
| 2026-04-01 12:00 |
15:48:46.54 |
-45:31:38.3 |
HIP 77574 |
17.45 |
| 2026-04-02 00:00 |
15:48:41.69 |
-45:31:58.5 |
HIP 77574 |
18.36 |
| 2026-04-02 12:00 |
15:48:36.79 |
-45:32:18.4 |
HIP 77574 |
19.28 |
| 2026-04-03 00:00 |
15:48:31.84 |
-45:32:38.0 |
HIP 77574 |
20.20 |
| 2026-04-03 12:00 |
15:48:26.84 |
-45:32:57.3 |
HIP 77574 |
21.13 |
| 2026-04-04 00:00 |
15:48:21.80 |
-45:33:16.3 |
HIP 77574 |
22.07 |
| 2026-04-04 12:00 |
15:48:16.71 |
-45:33:35.0 |
HIP 77574 |
23.01 |
| 2026-04-05 00:00 |
15:48:11.58 |
-45:33:53.5 |
HIP 77574 |
23.95 |
| 2026-04-05 12:00 |
15:48:06.40 |
-45:34:11.6 |
HIP 77574 |
24.90 |
| 2026-04-06 00:00 |
15:48:01.17 |
-45:34:29.4 |
HIP 77574 |
25.86 |
| 2026-04-06 12:00 |
15:47:55.90 |
-45:34:46.9 |
HIP 77574 |
26.82 |
| 2026-04-07 00:00 |
15:47:50.59 |
-45:35:04.2 |
HIP 77574 |
27.79 |
| 2026-04-07 12:00 |
15:47:45.23 |
-45:35:21.1 |
HIP 77145 |
28.66 |
| 2026-04-08 00:00 |
15:47:39.83 |
-45:35:37.7 |
HIP 77145 |
27.77 |
| 2026-04-08 12:00 |
15:47:34.38 |
-45:35:54.0 |
HIP 77145 |
26.88 |
| 2026-04-09 00:00 |
15:47:28.89 |
-45:36:10.0 |
HIP 77145 |
25.98 |
| 2026-04-09 12:00 |
15:47:23.36 |
-45:36:25.7 |
HIP 77145 |
25.09 |
| 2026-04-10 00:00 |
15:47:17.79 |
-45:36:41.1 |
HIP 77145 |
24.19 |
| 2026-04-10 12:00 |
15:47:12.18 |
-45:36:56.1 |
HIP 77145 |
23.30 |
| 2026-04-11 00:00 |
15:47:06.52 |
-45:37:10.9 |
HIP 77145 |
22.40 |
| 2026-04-11 12:00 |
15:47:00.83 |
-45:37:25.3 |
HIP 77145 |
21.51 |
| 2026-04-12 00:00 |
15:46:55.09 |
-45:37:39.4 |
HIP 77145 |
20.63 |
| 2026-04-12 12:00 |
15:46:49.32 |
-45:37:53.2 |
HIP 77145 |
19.75 |
| 2026-04-13 00:00 |
15:46:43.50 |
-45:38:06.7 |
HIP 77145 |
18.88 |
| 2026-04-13 12:00 |
15:46:37.65 |
-45:38:19.8 |
HIP 77145 |
18.02 |
| 2026-04-14 00:00 |
15:46:31.75 |
-45:38:32.6 |
HIP 77145 |
17.17 |
| 2026-04-14 12:00 |
15:46:25.82 |
-45:38:45.1 |
HIP 77145 |
16.34 |
| 2026-04-15 00:00 |
15:46:19.85 |
-45:38:57.3 |
HIP 77145 |
15.52 |
| 2026-04-15 12:00 |
15:46:13.85 |
-45:39:09.2 |
HIP 77145 |
14.73 |
| 2026-04-16 00:00 |
15:46:07.81 |
-45:39:20.7 |
HIP 77145 |
13.97 |